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MultiFlex CUB-II

Emerson MultiFlex CUB-II, MultiFlex CUB-TD Installation And Operation Manual

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026-1705 Rev 7 06-APR-2010
MultiFlex Condensing Unit Board
(CUB-II and CUB-TD) Installation and
Operation Manual
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3240 Town Point Drive NW Suite 100
Kennesaw, GA 30144, USA
Phone: 770-425-2724
ALL RIGHTS RESERVED The information contained in this manual has been carefully checked and is believed
to be accurate. However, Computer Process Controls, Inc. assumes no responsibility for any inaccuracies that may be contained herein. In no event will Computer Process Controls, Inc. be liable for any direct, indirect, special, incidental, or consequential damages resulting from any defect or omission in this manual, even if advised of the possibility of such damages. In the interest of continued product development, Com­puter Process Controls, Inc. reserves the right to make improvements to this manual, and the products described herein, at any time without notice or obligation.
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Table of Contents
1 OVERVIEW OF THE MULTIFLEX CUB-II AND CUB-TD.................................................................................. 1
1.1. T
HE MULTIFLEX CUB-II.............................................................................................................................................. 1
1.2. T
HE MULTIFLEX CUB-TD........................................................................................................................................... 1
2 MOUNTING AND POWERING.................................................................................................................................. 2
2.1. S
NAP-TRACK INSTALLATION........................................................................................................................................ 2
2.2. T
HE PLUG-IN OUTPUT BOARD ..................................................................................................................................... 3
2.3. P
OWERING THE MULTIFLEX CUB BOARD ................................................................................................................... 3
2.3.1. Choosing Transformer Sizes ................................................................................................................................. 4
2.3.2. MultiFlex CUB Power Wiring............................................................................................................................... 4
2.3.2.1. New-Style MultiFlex CUB Boards (With Isolated Power Supply)....................... .. ............................. .............................. 5
2.3.2.2. Old-Style MultiFlex CUB Boards (No Isolated Power Supply)......................................................................................... 5
2.3.3. Wire Types and Maximum Distances.................................................................................................................... 6
3 THE I/O NETWORK .................................................................................................................................................... 7
3.1. W
IRING TYPES.............................................................................................................................................................. 7
3.1.1. Daisy Chains......................................................................................................................................................... 7
3.1.2. Network ID Numbers............................................................................................................................................. 7
3.1.2.1. Numbering the MultiFlex
CUB ................................................................................................................................................................................................... 8
3.1.3. Setting the Baud Rate............................................................................................................................................ 8
3.1.4. Setting the Terminating Resistance Jumpers ........................................................................................................ 8
4 CUB INPUT AND OUTPUT SETUP..................................................................... ...................................................... 9
4.1. T
HE INPUTS................................................................................................................................................................... 9
4.1.1. Connecting Sensors to the MultiFlex CUB........................................................................................................... 9
4.1.1.1. Wiring.......................................... ........................... ........................... ................................................................................. 9
4.1.1.2. Sensor Wiring Types .......................................................................................................................................................... 9
4.1.1.3. Input Type Dip Switches .................................................................................................................................................... 9
4.1.2. Power Connection............................................................................................................................................... 10
4.1.2.1. Current Ratings for On-Board Power Sources.................................................................................................................. 10
4.1.2.2. Powering Sensors Requiring 24VAC Off the Power Transformer.............................................. ..................................... 10
4.1.3. MultiFlex CUB Fixed Input Locations................................................................................................................ 10
4.2. T
HE OUTPUTS ............................................................................................................................................................. 11
4.2.1. Relay Output Ratings and Fuse Protection......................................................................................................... 12
4.2.2. Wiring Outputs to Points..................................................................................................................................... 12
4.2.3. MultiFlex CUB Fixed Outputs............................................................................................................................ 12
5 BOARD STATUS LEDS ............................................................................................................................................. 13
5.1. S
TATUS LED................................................................. .................................. ............................................................ 13
5.2. T
X AND RX LEDS....................................................................................................................................................... 13
5.3. C
ODE A AND CODE B LEDS ...................................................................................................................................... 13
5.4. R
ELAY OUTPUT LEDS................................................................................................................................................ 14
6 MULTIFLEX CUB-II AND CUB-TD SOFTWARE OVERVIEW......................................................... ............... 15
6.1. C
OMPRESSOR CONTROL.............................................................................................................................................. 15
6.1.1. Suction Pressure Compressor Control................................................................................................................ 15
6.1.2. Case Temperature Compressor Control............................................................................................................. 15
6.1.2.1. Pump Down .. ........................... ..................................................... .................................................................................... 15
6.1.2.2. Fallback Pressure Setpoints ............................. ........................... ...................................................................................... 15
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6.2. CONDENSER FAN CONTROL ....................................................................................................................................... 16
6.2.1. Temperature Differential (TD) Strategy ............................................................................................................. 16
6.2.1.1. TD Control Fail-Safes..................... ........................... .. ........................... .......................................................................... 16
6.2.2. Pressure Control Strategy.................................................... .................................. ... .......................................... 16
6.2.3. Case Temperature Control.................................................................................................................................. 17
6.3. D
EFROST CONTROL .................................................................................................................................................... 17
6.3.1. Defrost Termination............................................................................................................................................ 17
6.4. S
ENSOR CONTROL ...................................................................................................................................................... 17
6.4.1. How Cut In/Cut Out Control Works .................................. ................................. ................................................ 17
6.4.2. Motor Room Temperature Control..................................................................................................................... 18
6.4.2.1. Exhaust Fan Control .................................................... ..................................................................................................... 18
6.4.2.2. Example of a Motor Room Zone Temperature Configuration ........ ........................... ...................................................... 18
6.5. ALARM CONDITIONS (SAFETY MODES) ..................................................................................................................... 19
6.5.1. High Discharge Trip Safety Mode...................................................................................................................... 19
6.5.2. Compressor Proof Fail Safety Mode .................................................................................................................. 19
6.5.3. Compressor Oil Failure Safety Mode................................................................. ................................................ 20
6.5.4. Phase Fail Mode................................................................................................................................................. 20
6.6. D
OOR SWITCHES AND CLEAN (WASH) SWITCHES ..................................................................................................... 20
6.6.1. Door Switches..................................................................................................................................................... 20
6.6.2. Clean (Wash) Switches........................................................................................................................................ 21
7 THE MULTIFLEX CUB E2/ EINSTEIN INTERFACE......................................................................................... 22
7.1. A
DDING/DELETING A CUB ........................................................................................................................................ 22
7.1.1. Adding a CUB......................................................................... ............................................................................ 22
7.1.2. Deleting a CUB................................................................................................................................................... 23
7.2. V
IEWING THE CUB STATUS SCREEN ......................................................................................................................... 23
7.2.1. Inputs and Setpoints............................................................................................................................................ 24
7.2.2. Sensor Control .................................................................................................................................................... 25
7.2.3. Outputs and Operational States.......................................................................................................................... 25
7.2.4. Defrost................................................................................................................................................................. 26
7.2.5. KW Usage ........................................................................................................................................................... 26
7.3. P
ROGRAMMING THE CUB USING THE E2 OR EINSTEIN FRONT PANEL..................................................................... 26
7.3.1. Screen 1: General ............................................................................................................................................... 27
7.3.2. Screen 2: Setpoints.............................................................................................................................................. 28
7.3.2.1. Temperature Differential (TD) ................................................................. ........................................................................ 30
7.3.2.2. Traditional Strategy ...................... .................................................................................................................................... 30
7.3.3. Screen 3: Inputs .................................................................................................................................................. 31
7.3.4. Screen 4: Aux Inputs........................................................................................................................................... 32
7.3.5. Screen 5: CUB Inputs ......................................................................................................................................... 32
7.3.6. Screen 6: Defrost ................................................................................................................................................ 34
7.3.7. Screen 7: Outputs................................................................................................................................................ 35
7.3.8. Screen 8: CUB Outputs....................................................................................................................................... 37
7.3.9. Screen 9: Sensor Control.................................................................................................................................... 38
7.3.10. Screen 10: Alarms............................................................................................................................................. 39
7.3.10.1. Oil Failure Alarm Setpoints............................................................................................................................................ 39
7.3.10.2. Discharge Pressure Alarm .............................................................................................................................................. 40
7.3.10.3. High/Low Suction Pressure Alarms ......... .. ........................... ......................................................................................... 41
7.3.10.4. Compressor Proof Alarms .............................................................................................................................................. 41
7.3.10.5. Phase Fail Shutdown....................................................................................................................................................... 42
7.3.10.6. Door Switch Alarms ....................................................................................................................................................... 42
7.3.10.7. Wash Active Alarms....................................................................................................................................................... 42
7.3.10.8. Case Temperature Alarms .............................................................................................................................................. 42
7.3.10.9. Suction Temperature Alarms.......................................................................................................................................... 43
7.3.10.10. TD Condenser Control Alarms..................................................................................................................................... 43
MultiFlex CUB-II and CUB-TD I&O Guide Table of Contents • vii
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8 THE MULTIFLEX CUB HAND-HELD INTERFACE........................................................................................... 44
8.1. CUB H
AND-HELD TERMINAL STATUS SCREENS ....................................................................................................... 44
8.1.1. Pressure Status.................................................................................................................................................... 44
8.1.2. Case Temp Status................................................................................................................................................ 44
8.1.3. Other Temperatures ............................................................................................................................................ 44
8.1.4. Input Summary Screen ........................................................................................................................................ 45
8.1.5. Outputs Summary Screen #1............................................................................................................................... 45
8.1.6. Outputs Summary Screen #2............................................................................................................................... 45
8.1.7. System Status....................................................................................................................................................... 45
8.1.8. Refrigeration Control Status............................................................................................................................... 45
8.2. A
LTERING CUB CONFIGURATION USING THE HAND-HELD TERMINAL.................................................................... 45
8.2.1. The Main Configuration Menu............................................................................................................................ 45
8.2.2. Navigation........................................................................................................................................................... 46
8.2.3. General Hand-Held Terminal Screens................................................................................................................ 46
8.2.3.1. Circuit Name......................................... ........................... ........................... ...................................................................... 46
8.2.3.2. Refrigerant Select................ ... .......................... ................................................................................................................. 47
8.2.3.3. Phase.................... ........................... .......................... ........................................................................................................ 47
8.2.3.4. Temp EU.................. ........................... ........................... .......................... ......................................................................... 47
8.2.3.5. Time and Date................................................................................................................................................................... 48
8.2.3.6. Daylight Savings Time ..................................................................................................................................................... 48
8.2.4. Setpoints Screens................................................................................................................................................. 48
8.2.4.1. Condenser Setpoints ......................................................................................................................................................... 49
8.2.4.2. TD Strat Info.......... ........................... ........................... ..................................................................................................... 49
8.2.4.3. TD Max............................................... ........................... .......................... ......................................................................... 49
8.2.4.4. Comb Method ........................................................... ........................... ............................................................................. 49
8.2.4.5. Min OFF/ON Times.......... ...................................................... .......................... ................................................................ 50
8.2.4.6. Condenser SPs .................................................................................................................................................................. 51
8.2.4.7. Condenser Fan 1 Setpoints ............................................................................................................................................... 51
8.2.4.8. Condenser Fan 2 Setpoints ............................................................................................................................................... 51
8.2.5. Alarm Setpoints Screens...................................................................................................................................... 52
8.2.5.1. Case Hi and Lo Temp ....................................................................................................................................................... 52
8.2.5.2. Phase Fail........ ...................................................... ........................... ................................................................................. 52
8.2.5.3. Shut Down On Proof......................................................................................................................................................... 52
8.2.5.4. Proof Failure ........ ........................... ..................................................... ............................................................................. 53
8.2.5.5. Oil Restart Delay .............................................................................................................................................................. 53
8.2.5.6. Digital Oil Failure............................................................................................................................................................. 53
8.2.5.7. High Discharge Alarm........................................................................... ........................................................................... 54
8.2.5.8. High Discharge Auto Resets............................................................................................................................................. 54
8.2.5.9. Door Switch.................. .......................... ........................... ........................... .................................................................... 54
8.2.5.10. Wash Switch ................................................................................................................................................................... 54
8.2.6. Defrost Setup Screens.......................................................................................................................................... 55
8.2.6.1. Defrost Type .......... .. ........................... .............................................................................................................................. 55
8.2.6.2. Fan Control .......... ................................................................................ ............................................................................. 55
8.2.6.3. Defrost Times ...................................................................... ........................... .................................................................. 56
8.2.6.4. Defrost Schedule Screens 1 and 2..................................................................................................................................... 56
8.2.7. Input Setup Screens............................................................................................................................................. 56
8.2.7.1. Input Setup ....................................................................................................................................................................... 56
8.2.8. Outputs Screens................................................................................................................................................... 58
8.2.9. Auxiliary Inputs Screens.................................................................... .................................................................. 58
8.2.9.1. Pulse KW Setup ..................................................... ........................... ............................................................................... 58
8.2.9.2. Analog KW Setup ............................................................................................................................................................ 58
8.2.9.3. Linear 1 and 2 Setup ......................................................................................................................................................... 58
8.2.10. Sensor Control Screens..................................................................................................................................... 59
8.2.10.1. Sensor Screen 1 (Name, Type) .......... ............................. ............................. .................................................................. 59
8.2.10.2. Sensor Screen 2 (Cut In/Out, Min ON/OFF).......... ............................. .. ............................. ............................................ 59
8.2.10.3. Sensor Screen 3 (Hi/Lo Alarm) ...................................................................................................................................... 60
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8.2.10.4. Sensor Control Screen 4 (Alarm Priority, Comb Method)............................................................................................. 60
APPENDIX A: TD QUICK START ..................................... .................................. ........................................................ 62
APPENDIX B: CASE TYPE DEFAULTS ................................................................ ..................................................... 68
MultiFlex CUB-II and CUB-TD I&O Guide Table of Contents • ix
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1 Overview of the Multi-
Flex CUB-II and CUB-TD
The MultiFlex CUB-II and CUB-TD boards are “smart” input/output boards designed to con­trol single condensing units. A single condens­ing unit is a self-contained compressor and condenser bearing unit which controls refrigera­tion in a single case line-up or walk-in cooler. The MultiFlex CUB-II controllers are capable of commanding compressors, condensers, refriger­ation, and defrost for a single condensing unit using on-board I/O and control algorithms. The CUB-TD controller is a more limited board that controls only condensers, using a temperature differential control strategy.
The MultiFlex’s I/O Points
The compact size of the MultiFlex allows technicians to easily field-mount the MultiFlex CUB-II and CUB-TD in a panel or enclosure close to the single condensing unit, allowing for easy local connection of sensors and transducers. The board has 16 analog inputs (for connection to vital input sources, such as suction pressure transducers and case temperature sensors) and eight relay outputs, rated 2.0 amps max, for acti­vating and deactivating compressors, defrost, and condenser fans.
Independent System Control
The MultiFlex CUB-II and CUB-TD con­trollers are equipped with software and an enhanced processor, which gives them the capa­bility of controlling independently without the need of a central controller (such as CPC’ s E2 or Einstein RX Refrigeration Controller). However, the CUB-II and CUB-TD are designed to inter­face with an E2 or Einstein for purposes of dis­playing status on status screens, reporting alarms, and recording logs. The CUB-II and CUB-TD may be configured either with a CPC Hand-Held T erminal (HHT) or through the E2 or Einstein front panel.
1.1. The MultiFlex CUB-II
The MultiFlex CUB-II controllers are capa­ble of handling all aspects of single condensing unit control, including compressors, condensers, refrigeration, and defrost, using on-board I/O and control algorithms. The CUB-II is capable of controlling one single-stage compressor, refrigeration and scheduled/terminated defrost in a case circuit with up to six temperature inputs, and condenser control using either a control by pressure strategy (activates up to two fans to maintain a set discharge pressure) or temperature differential strategy (activates up to four fans to maintain a set difference between the ambient temperature and the drop leg refrigerant temper­ature).
1.2. The MultiFlex CUB-TD
The MultiFlex CUB-TD is a “stripped” ver­sion of the MultiFlex CUB-II that includes only an algorithm for temperature differential (TD) condenser fan control. Up to four condensing unit fans are cycled on and off as required to meet compressor unit heat of rejection load. The TD algorithm subtracts plenum air temperature from the drop leg temperature and uses the dif­ference between the two temperatures as a con­trol value. If the difference is higher than the setpoint, the fans are staged on. If the difference is lower than the setpoint, the fans are staged off.
The temperature differential control capabili­ties of the CUB-TD are identical to those of a CUB-II operating in temperature differential mode, except the CUB-TD controls condensers only. The CUB-TD only has inputs for reading temperatures and outputs for controlling up to four fans. For control of any other single con­densing unit subsystem, a CUB-II will neces­sary.
The MultiFlex CUB-II Overview of the MultiFlex CUB-II and CUB-TD • 1
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2 Mounting and Power-
ing
The MultiFlex boards are usually mounted by the refrigeration equipment manufacturer. Therefore, the installer need only make the nec­essary connections between the boards and the site controller(s).
In some instances, an installer may be required to mount an I/O board. There are no restrictions on the location of these boards; how­ever, for ease of network configuration, it is rec­ommended that the boards be located adjacent to the E2 or Einstein. I/O boards may be mounted without an enclosure, but they should be mounted in a location that is not easily accessi­ble to avoid tampering or damage.
2.1. Snap-Track Installation
MultiFlex boards not supplied in a custom panel or other enclosure are supplied with a snap-track for easy installation. The insulation sheet and I/O board must be removed from the track before the track is mounted. The snap-track is mounted using the 0.1875” mounting slots. Figure 2-1 shows this installation procedure.
2 • MultiFlex CUB-II and CUB-TD I&O Guide 026-1705 Rev 7 06-APR-2010
Figure 2-1 - MultiFlex Snap-Track Mounting
Figure 2-2 provides mounting dimensions
for the MultiFlex board.
Figure 2-2 - MultiFlex Board Dimensions
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2.2. The Plug-In Output Board
The additional board makes the MultiFlex CUB boards considerably taller than the Multi­Flex 16 and other CPC I/O boards. If you will be mounting these boards in an enclosure, the board will need at least 2.5” of clearance between the baseboard and the panel door.
2.3. Powering the MultiFlex
CUB Board
WARNING: All models of MultiFlex require a 24V AC Class 2 input power source. The Multi­Flex CUB-II requires the power source to be non-center-tapped. Refer to Section 2.3.1.,
Choosing Transformer Sizes for center tap usage.
CPC supplies a wide variety of 24VAC trans­formers with varying sizes and either with or without center taps. Table 2-1 shows the trans- former sizes and whether they are center-tapped or non-center-tapped.
Figure 2-3 - Exploded View — MultiFlex CUB-II
The MultiFlex CUB has an output sub-board that plugs to the top of the baseboard. Typically, these boards are shipped with the output board pre-installed on the board using stand-offs, so no additional hardware setup should be necessary.
Xformer P/N VA Rating Primary Voltage Center Tap?
640-0041 50 VA 110 VAC No 640-0042 50 VA 220 VAC No 640-0056 56 VA Multi-tap (120/208/240 VAC) Yes 640-0050 75 VA 110 VAC No 640-0045 75 VA 220 VAC No 640-0080 80 VA Multi-tap (120/208/240 VAC) Yes
Table 2-1 - Transformers Compatible with Datalink Module
The Plug-In Output Board Mounting and Powering • 3
Page 14
2.3.1. Choosing Transformer Sizes
POWER LED
New Style
MultiFlex Board
(Top Left Corner)
NO POWER LED
Old Style
MultiFlex Board
(Top Left Corner)
24 VAC
24 VAC
In most site installations, a single trans-
former will power multiple devices. Choose a transformer with a VA rating large enough to power all devices that will be attached to it. Table 2-2 gives the VA ratings of the MultiFlex CUB in conjunction with other MultiFlex boards. Refer to your site controller’s manual for VA ratings of the other I/O boards that may be powered by one of these transformers.
Unit VA VAC Center-
Tapped?
MultiFlex 16 624Yes
MultiFlex 88,
88AO, 168,
and 168AO
MultiFlex RTU 15 24 NO MultiFlex CUB 15 24 NO
Table 2-2 - Device Power Requirements
15 24 NO
A new-style MultiFlex board has a green power LED located next to the 24VAC connec­tion terminal in the upper right corner of the cir­cuit board (see Figure 2-4 for reference).
2.3.2. MultiFlex CUB Power Wiring
The MultiFlex CUB boards do not use a cen­ter tap. Instead, the 0V terminal on the board should be connected to a separate earth ground.
Important! The rules that must be fol­lowed when connecting a MultiFlex CUB board to a transformer are different depend­ing on whether you have a "new style" Multi­Flex board with an isolated power supply (all MultiFlex boards shipped after November 1,
2002) or an "old style" MultiFlex board (all MultiFlex boards shipped before November 1, 2002).
Figure 2-4 - New-Style vs. Old-Style MultiFlex Board
If there is a green power LED next to the
connector, your MultiFlex is a new-style Multi-
Flex -- refer to Section 2.3.2.1., New-Style Mul­tiFlex CUB Boards (With Isolated Power Supply) for power wiring instructions.
If there is no green power LED next to the
connector, your MultiFlex is an old-style Multi-
Flex -- refer to Section 2.3.2.2., Old-Style Multi­Flex CUB Boards (No Isolated Power Supply)
for power wiring instructions.
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Page 15
2.3.2.1. New-Style MultiFlex CUB Boards
Earth ground. Use 14 AWG or larger. Keep as short as possible. Less than six inches is preferred.
(With Isolated Power Supply)
The new-style MultiFlex board can be con-
nected to any of the center-tapped transformers
mentioned in Table 2-2, provided the 0V termi-
nal of the board is connected to an earth ground.
NOTE: 14AWG or larger should be used for earth ground and the length should be kept short. Less than six inches is preferred.
A center-tapped transformer may power
both center-tapped and non-center-tapped
devices at the same time, as long as none of the
non-center-tapped MultiFlex boards are old-
style MultiFlex boards. If an old-style Multi-
Flex shares the same center-tapped transformer
as a device that uses the center tap, the old-style
MultiFlex will be damaged. Figure 2-5 shows
how to wire a non-center-tapped device to a cen-
ter-tapped transformer.
In addition, the MultiFlex CUB boards can
be powered by one of the 50VA or 75VA non­center-tapped transformers listed in Table 2-1 on page 3. Figure 2-6 shows how to wire the trans­formers to the MultiFlex boards.
Figure 2-6 - Non-Center-Tapped Transformer Wiring
2.3.2.2. Old-Style MultiFlex CUB Boards (No Isolated Power Supply)
Figure 2-5 - Wiring Non-Center-Tapped MultiFlex Boards to Transformers With a Center Tap
Like the new-style MultiFlex board, the old­style MultiFlex board can be connected to any of the center-tapped transformers mentioned in Table 2-2, provided you observe the following three rules:
Rule 1: Ground the 0V terminal on the old­style MultiFlex board to an earth ground.
Do not connect the center tap of the trans­former to the 0V terminal.
Rule 2: Do not power an old-style MultiFlex non-center-tapped board with a transformer that is also powering a center-tapped device.
This means you cannot connect an old-style MultiFlex non-center-tapped board to a trans­former that is powering a MultiFlex 16, 16AI, 8RO, 4AO, 8DO, or any previous generation CPC board that uses center-tapped power. Doing so will destroy the MultiFlex board.
Rule 3: The secondary of the transformer must not be grounded on any side.
Powering the MultiFlex CUB Board Mounting and Powering • 5
Page 16
Verify that neither side of the transformer secondary is connected to earth ground before powering the old-style MultiFlex board. A grounded secondary will damage the MultiFlex board.
In addition, the old-style MultiFlex CUB boards can be powered by one of the 50VA or 75VA non-center-tapped transformers listed in Table 2-1 on page 3. Figure 2-6 shows how to wire the transformers to the MultiFlex boards.
2.3.3. Wire Types and Maximum Dis-
tances
Use these formulas to determine if the wire
gauge you are using fits within specification:
14 AWG:
Feet = 1920/VA
18 AWG:
Feet = 739/VA (VA is the total VA rating of the I/O board s) For example, if you had an 80 VA load: 14 AWG: 24 ft 18 AWG: 9 ft (rounded down)
Figure 2-7 - Power Wire Lengths
For powering I/O boards, use only the listed wire types from Table 2-3. Three-conductor non- shielded cables are the recommended wire for connecting between the center-tapped trans­former and the I/O boards. Shielded cable should not be used for power wiring. The center tap should be wired with the third conductor to earth ground at the controller. (Use 14AWG and keep the length of wire short. Less than six inches is preferred).
Power Wiring Types
14 AWG Belden 9495 18 AWG Belden 9493
Table 2-3 - Power W iring Types
The wire length from the transformer and the number of boards connected to the same wire determines the type wire gauge used. In most cases, the distance between the I/O boards and the transformer that supplies power to them is not enough to be concerned with. But it is very important not exceed this maximum wire length or the boards will malfunction.
Sensors requiring 24VAC can be powered from the same transformer powering the input board as long as the resulting total load of both the input board(s) and the sensor(s) connected to the transformer does not exceed the trans­former’s VA rating, and the sensors have an iso­lated power supply . If the sensors do not have an isolated power supply, they could be damaged if connected with center-tapped or grounded sec­ondary transformers.
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3The I/O Network
Although the MultiFlex CUB can operate as a stand-alone controller, it relies on an E2, Ein­stein, or REFLECS unit for advanced features such as remote dial-in/dial-out, logging, and alarm control. All MultiFlex boards and control­lers use an RS485 Network connection to com­municate with an E2, Einstein, and REFLECS site controllers. Technicians who are familiar with CPC’s previous generation 16AI, 8IO, and ARTC boards will find the network setup proce­dure for the MultiFlex CUB boards to be very much the same.
3.1. Wiring Types
CPC specs Belden #8761 shielded twisted pair cables for use as I/O Network wiring (or Belden #82761 and Belden #88761 for plenum installations).
If the recommended cable is not available in your area, be sure the wiring meets or exceeds the following specs:
put communication boards, and terminates at the last input or output board on the network. A dia­gram of this network arrangement is shown in
Figure 3-1.
Figure 3-1 - I/O Network Configurations
3.1.2. Network ID Numbers
Each device on an RS485 segment has a net-
work dip switch that must be used to assign the board a unique network ID number.
The network ID number makes a board unique from other boards on the network of the same type. This allows the site controller to find it and communicate with it easily.
Shielded? Yes
Conductor Type Twisted Pair
Gauge 18 - 24 AWG
Capacitance between
signal wires
Capacitance between
signal and shield
Nominal Impedance 12050
Table 3-1 - RS485 I/O Network Wiring Specifications
31 pF/ft or less
59 pF/ft or less
3.1.1. Daisy Chains
The RS485 Input/Output (I/O) Network con­nects all input and output communication boards together in a single open communications loop. This loop, or “daisy chain,” connects the E2, Einstein, or REFLECS to multiple input and out-
Boards of the same type should be numbered in sequence, starting with one and continuing with two, three, and so forth.
Wiring Types The I/O Network • 7
Page 18
3.1.2.1. Numbering the MultiFlex CUB
The MultiFlex CUB is a unique board type on the RS485 Network by the CPC controllers. Each CUB that will be associated with an E2 or Einstein must have a unique number from 1 to 31, which is configured by setting the first five switches on dip switch bank S3.
3.1.4. Setting the Terminating Resis­tance Jumpers
All MultiFlex boards and other RS485 devices have a set of terminating resistance jumpers (one jumper for each wire lead). These jumpers are labeled JP2, JP3, and JP4 on the MultiFlex board.
The purpose of the jumpers is to indicate the two ends, or termination points, of the segment. On a daisy chain, one device at the beginning and one device on the end must be terminated by placing all three termination jumpers in the OUT (toward the left edge of the board) position. All other devices on the daisy chain must be set to the IN (toward the center of the board) position. Figure 3-3 shows the proper terminating resis­tance jumper settings for the E2, Einstein, and for all I/O boards.
Figure 3-2 - CUB-II Baud Rate Switches
3.1.3. Setting the Baud Rate
All I/O boards have dip switches that deter­mine the baud rate at which they communicate. Currently, the baud rate dip switch in network components may be set at either 9600 or 19200 baud. Either may be used — refer to your site controller’s user manual for the baud rate recom­mendation (currently 9600 baud for REFLECS, E2, and Einstein controllers).
On all MultiFlex boards, switches 6 and 7 on S3 are used to set the baud rate. T o communicate at 9600 baud, set switch #6 UP and #7 DOWN. For 19200 baud, set switch #6 DOWN and #7 UP. Refer to Figure 3-2 for a visual look at how the switches must be set.
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Figure 3-3 - I/O Network Termination Jumper Settings
Page 19
4 CUB Input and Output
Setup
4.1. The Inputs
4.1.1. Connecting Sensors to the MultiFlex CUB
Wiring an input to the input points on a Mul-
tiFlex board requires three steps:
1. Connect the sensor’s signal wires to the two
terminals of an input point.
2. Set the input type dip switch that corre-
sponds to the point being connected.
3. If necessary , connect the sensor to one of the
5V or 12V power terminals.
4.1.1.1. Wiring
An input point on a MultiFlex board consists
of two terminals, as shown in Figure 4-1. One of these terminals, labeled SIG, reads the signal from the sensor, while the other, labeled 0v is where the sensor’s ground and/or cable shield wire is connected.
All Pressure Transducers, Humidity Sensors, and Re­frigeration Transducers
Pressure and refrigeration transducers and humidity sensors are to be wired with shielded, 3 conductor, at least 22 GA wire (Belden #8771 or equivalent).
Dewpoint and Light Level Sensors
These sensors are to be wired with shielded, 4 conductor at least 22 GA wire (Belden # 8729 or equivalent).
4.1.1.3. Input Type Dip Switches
Each MultiFlex input point has an input type dip switch that must be set. Input type dip switches are located in the switch banks labeled S1 and S2.
The input type dip switch tells the input board whether or not the sensor connected to the point is a resistive type sensor. Generally, if the sensor or transducer supplies its own voltage signal to the point, the dip switch should be set to the LEFT position. If the sensor uses variable resistance and requires voltage to be supplied to it from the input point, set the dip switch to the RIGHT position. Dip switches for unused points should be set to the RIGHT position.
Figure 4-1 - Input Board Points
4.1.1.2. Sensor Wiring Types
Specific wiring types are required for each
type of sensor used with E2, Einstein, or RMCC.
All Analog Temperature Sensors and Air Flow Sen­sors
Temperature and air flow sensors are to be wired with shielded, 2 conductor, at least 22 GA wire (Belden # 8761 or equivalent).
The Inputs CUB Input and Output Setup • 9
Figure 4-2 - Input Type Dip Switches for CUB Board
Page 20
4.1.2. Power Connection
If power is needed to operate the sensor, four
points are provided on the MultiFlex board that supply DC power: one +12VDC point, and three +5VDC points. See Figure 4-3 for the location of these points.
Figure 4-3 - Input Board Power Sources
To connect to one of the DC power sources,
simply connect the sensor’s power wire to one of the terminals.
A sensor that requires 24VAC can be pow-
ered off the MultiFlex’s own 24VAC power con­nection. T o connect to the 24VAC power source, connect the sensor’s power wires to terminals AC1 and AC2.
4.1.2.1. Current Ratings for On-Board Power Sources
The maximum current that may be drawn from the +12VDC terminal is 100 milliamps. The maximum current that can be drawn from all three +5VDC terminals COMBINED is 50 milliamps.
4.1.2.2. Powering Sensors Requiring
24VAC Off the Power Transform­er
Some sensors that requires 24VAC can be powered off the MultiFlex’s own 24VAC power connection. To connect to the 24VAC power source, connect the sensor’s power wires to ter­minals AC1 and AC2.
This can only be done with sensors that keep the 24VAC signal isolated from its DC output signal (such as CPC’s Dewpoint Probe). If the output signal is not isolated from the 24VAC input, you must use a separate transformer.
4.1.3. MultiFlex CUB Fixed Input Lo-
cations
The MultiFlex CUB supports a large number of different types of input sources that might be found on a single condensing unit’s pressure control, condenser control, or refrigeration con­trol systems. Because input locations are speci­fied by the user in the system software, you can connect inputs from the condensing unit to any point on the CUB. However, to make setup eas­ier, the CUB has assigned default sensor loca­tions to a few of the inputs on the board.
Table 4-1 lists the inputs with assigned defaults. If you choose to not use the defaults listed, you may change any or all of them in the system software (see Section 7.3.3., Screen 3: Inputs and Section 8.2.7., Input Setup Screens).
CUB Input
Point
Number
1 Suction
2 Discharge
3 Oil Trans-
4 Case 1
16 Alarm
Label
Transducer
Transducer
ducer
Temp
Reset
Sensor to Connect
To This Point
0-100PSI Pressure Transducer, measuring suction pressure
0-500PSI Pressure Transducer, measuring discharge pressure
0-200PSI Pressure Transducer, for measur­ing oil pressure
Discharge air tempera­ture sensor for the cooler or case lineup
Digital contact closure (switch or push button) to reset alarms
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Table 4-1 - CUB Default Inputs
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4.2. The Outputs
The MultiFlex CUB has eight relays that
energize and de-energize to control output loads.
Decision #1 is made by setting the fail-safe
switch. This is a bank of eight switches on the
plug-in output module. Each switch corresponds
to an output on the board (switch #1 = output #1,
etc.).
When setting up an output on one of these re-
lays, you must make two important decisions:
1. Do you want an ON command from your controller to mean “energize the relay” or “de-energize the relay,” and
2. When the relay is de-energized, as is the case when the CUB goes offline or loses power, do you want the contacts to be OPEN or CLOSED?
HHT
Display
ON OFF
ON OFF
ON OFF
Contact
State
CLOSED OPEN
OPEN CLOSED
CLOSED OPEN
Equipment
State
ON OFF
OFF ON
OFF ON
Fail Safe
ON UP N.C
OFF UP N.O
OFF UP N.C.
Decision #2 is made either by setting a fail-
safe jumper (for the MultiFlex CUB) or by wir­ing the load to either the N.O. or N.C. terminals on the Form C contact (for the MultiFlex 16I8O).
T able 4-2 shows how the fail-safe s witch and
Form C contacts should be configured based on how you want the output to perform during both normal operation and during network/power loss.
Set Failsafe Switch
To:
Form C Contacts
Used:
ON OFF
ON OFF
ON OFF
Table 4-2 - Output Board Fail-Safe and Switch Settings
CLOSED OPEN
OPEN CLOSEDONOFF
CLOSED OPEN
OFF ON
ON OFF
ON DOWN N.O
OFF DOWN N.C
OFF DOWN N.O
The Outputs CUB Input and Output Setup • 11
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4.2.1. Relay Output Ratings and Fuse
RELAY IS
CLOSED
ON POWE R
FAILURE
RELAY IS
OPEN ON
POWER FAILURE
Protection
Each relay output on the MultiFlex Combi­nation I/O boards is rated for up to 240 VAC with a maximum current of 2 amps.
Table 4-1 lists the inputs with assigned
defaults. If you choose to not use the defaults listed, you may change any or all of them in the system software (see Section 7.3.7., Screen 7: Outputs and Section 8.2.8., Outputs Screens).
Each relay is fused with a 2 amp fast-blow 5mm x 20mm fuse, Bussman GMA-2 or equiva­lent.
4.2.2. Wiring Outputs to Points
The MultiFlex CUB has Form C relay con­tacts. Figure 4-4 shows how to wire the three­terminal Form C contact.
One wire of the two-wire connection should always be connected to the middle terminal. The second wire must either be connected to the N.C. terminal (if you want the path to be closed when the relay is de-energized) or the N.O. terminal (if you want the path to be open during power fail­ure).
N.C. N.O. N.C. N.O.
Figure 4-4 - Form C Contact Wiring
CUB
Output
Point
Number
1 Compres-
2 Defrost Electric defrost heaters
3 Condenser
8 Alarm Out-
Table 4-3 - CUB Default Outputs
Label
sor
Fan #1
put
Device to Connect
To This Point
Compressor
or hot gas valve Condenser fan (or 1st
condenser fan if multi­ple fans are present)
Digital contact closure that is ON when an alarm condition is active in the condens­ing unit.
4.2.3. MultiFlex CUB Fixed Outputs
The MultiFlex CUB supports a large number of different types of output devices that might be found on a single condensing unit’s pressure control, condenser control, or refrigeration con­trol systems. Because output locations are speci­fied by the user in the system software, you can connect outputs from the condensing unit to any point on the CUB. However, to make setup eas­ier, the CUB has assigned default sensor loca­tions to a few of the inputs on the board.
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5 Board Status LEDs
When a MultiFlex board is powered up, you
will be able to determine the operating status of
the board by observing its status LEDs. Figure
5-1 shows the location of the MultiFlex’s status
LEDs.
Figure 5-1 - MultiFlex Status LED Locations
5.1. Status LED
The Status LED blinks green once per sec­ond to show that the board is powered and oper­ational. If this light is dark, the board has likely lost power.
5.2. Tx and Rx LEDs
The Tx and Rx LEDs indicate when the Mul­tiFlex is sending or receiving messages on the RS485 Network.
The Tx LED blinks once every time the Mul­tiFlex sends a response to the E2, Einstein, or REFLECS. The Rx LED blinks once when the MultiFlex receives a message.
If the MultiFlex is connected to the network and set up to communicate with the controller, you should see these lights blinking regularly. If they do not, there may be a problem with the net­work.
5.3. Code A and Code B LEDs
All MultiFlex models except the MultiFlex 16 have two LEDs labeled Code A and Code B. These LEDs indicate failure conditions. When these LEDs are OFF, there are no failures active. When one or both of these LEDs are blinking, there are failure conditions. The rate of blinking indicates the type of failure:
Code A Failure Conditions
• Blinking fast (4 times/second) - There is a problem
with the flash memory or hardware clock on this board. This generally means the board is bad and must be replaced.
• Blinking slow (1 time/second) - The board is not re-
ceiving any messages addressed to it. This means ei-
Status LED Board Status LEDs • 13
Page 24
ther the I/O Network is down or it has not yet been commissioned in the E2, Einstein, or REFLECS Network Configuration screen.
Code B Failure Conditions
• Blinking 2 times/second - The battery on this board
that backs up the CUB configuration during power failures has failed. If you see this light flashing, the battery will need to be replaced to avoid loss of con­figuration.
Also, check the position of the Enable Battery jump­er, located at the bottom right of the board just un­derneath the output plug-in board. If this jumper is set to the DOWN position, move it to the UP posi­tion. This will enable the battery and should cause the Code B light to stop flashing.
5.4. Relay Output LEDs
Each relay output point on a MultiFlex has an indicator LED that shows the status of the output. This LED is lit to show the output is ON, and unlit to show the output is OFF.
The definition of ON and OFF in this case is determined by the position of the fail-safe dip switch (see Table 4-2). Therefore, if the output’s switch is UP, a lit LED means the path is CLOSED for N.C. contacts and OPEN for N.O. contacts.
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6 MultiFlex CUB-II and
CUB-TD Software Over­view
The CUB-II is capable of controlling all vital systems of a single condensing unit, including compressors, condenser fans, evaporators and case circuit systems. Extended logging and alarm control capabilities require connection to an E2 or Einstein RX refrigeration controller.
6.1. Compressor Control
Since a single condensing unit has a single compressor, the MultiFlex CUB-II’s pressure control strategy uses simple Cut In/Cut Out strategy for activating and deactivating the com­pressor. The compressor may be controlled either by suction pressure or case temperature.
setpoint plus one-half the deadband, the com­pressor will turn ON and will remain ON until the case temperature falls below the setpoint minus one-half the deadband.
NOTE: A suction transducer is required even for temperature control and is used to prevent the compressor from operating below the min­imum suction pressure setpoint.
6.1.2.1. Pump Down
If the CUB-II is using the Temperature strat­egy, it also has the option of using a special Pump Down mode to pump refrigerant out of the evaporator coil when going from Refrigeration to Idle or from Refrigeration to Defrost.
A Pump Down causes the refrigeration sole­noid to shut while keeping the compressor ON. The compressor will remain ON until the suction pressure drops below a minimum setpoint (or until a fail-safe time elapses).
6.1.1. Suction Pressure Compressor Control
Using the Suction Pressure Control strategy , the CUB-II compares the suction pressure to a set of Cut In/Cut Out setpoints. If the suction pressure rises higher than the Cut In setpoint, the compressor is activated and remains activated until the suction pressure falls below the Cut Out setpoint.
To prevent short-cycling of the compressor, minimum ON and OFF times may be used in this strategy.
6.1.2. Case Temperature Compres-
sor Control
Using the Case Temperature Control strat­egy, the CUB-II only activates the compressor when refrigeration is necessary in the case. This strategy uses a temperature setpoint and a dead­band. When the case temperature is above the
Idle Pump Down With Door Switches
If a door switch is available and Idle Pump Down mode is enabled, the CUB-II will do a Pump Down every time a door switch is acti­vated.
6.1.2.2. Fallback Pressure Setpoints
When in Temperature strategy, if the case temperature sensors fail or the CUB-II is other­wise unable to determine the case circuit air tem­perature, the CUB-II will cease operating in Case Temperature Compressor Control mode and use fallback suction pressure Cut In/Cut Out setpoints to control the compressor. This fall­back mode operates exactly like the Suction Pressure Compressor Control mode described in Section 6.1.1.
The CUB-II will continue to operate using the fallback pressure setpoints until a case tem­perature sensor value becomes available. The CUB-II will then resume Temperature strategy control.
Compressor Control MultiFlex CUB-II and CUB-TD Software Overview • 15
Page 26
6.2. Condenser Fan Control
6.2.1. Temperature Differential (TD) Strategy
Temperature differential strategy attempts to keep a minimum amount of difference between the temperature of the refrigerant and the ambi­ent temperature.
The CUB-II and CUB-TD temperature differ­ential strategy uses drop leg temperature for the refrigerant temperature and plenum temperature for the ambient temperature. The formula for determining the TD control value is:
TD = (dropleg temp) + (dropleg offset*) ­plenum temp.
* DropLeg Offset is a user-configured parameter to allow fine-tun­ing of the drop leg temperature measurement.
In TD condenser control operation, when the
TD rises above TD setpoint + (TD deadband /
2), an increase in fan capacity is called for. Simi­larly, when the TD drops below TD setpoint - (TD deadband / 2), a decrease in fan capacity is called for. TD can control up to four condenser fans.
6.2.1.1. TD Control Fail-Safes
TD control operates as explained in Section
6.2.1. as long as plenum and drop leg tempera-
ture inputs are available and the drop leg temper­ature remains within a minimum/maximum range configured by the user. Otherwise, TD control uses various fail-safe modes to maintain proper operation of condenser control.
Drop Leg Temperature Not Available
In the event drop leg temperature is not available (due to probe failure), all fan stages will be staged on.
Drop Leg Temperature Above Maximum Drop Leg Setpoint
If the drop leg temperature (DropLeg Temp) rises above the maximum drop leg temperature setpoint (DropLeg Max), an increase will be called for until DropLeg Temp drops below DropLeg Max. This protects against the possibil­ity of the DropLeg Temp rising too high as a result of high plenum temperature.
Drop Leg Temperature Below Minimum Drop Leg Setpoint
If the drop leg temperature drops below the minimum drop leg temperature setpoint (DropLeg Min) a decrease will be called for until DropLeg Temp rises above DropLeg Min. This protects against the possibility of the DropLeg Temp falling too low as a result of low plenum temperature.
Plenum Temperature Not Available
If plenum temperature is not available (due to probe or communication failure), control will be based on the DropLeg Min and Max set­points.
6.2.2. Pressure Control Strategy
Pressure control strategy uses Cut In/Cut Out setpoints for control based on discharge pres­sure. The CUB-II can control a maximum of two fans using this strategy. This strategy is not available in the CUB-TD.
Traditional strategy condenser fan control simply compares the value of the discharge pres­sure transducer to a set of Cut In/Cut Out set­points for each fan. If the discharge pressure rises above the Cut In setpoint for a fan, that fan will turn ON and will remain active until the dis­charge pressure falls below the fan’ s Cut Out set­points.
Condenser fans may be programmed with a minimum ON time to prevent short-cycling.
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6.2.3. Case Temperature Control
Case temperature control supports using a combination of up to six case temperature inputs as the control input. The CUB-II also supports multiple strategies for combining multiple case temp inputs, including minimum temp, maxi­mum temp, and average temp.
6.3. Defrost Control
The CUB-II controls scheduled defrosts for its case circuit, and supports both electric and off-cycle (or timed) defrost. Up to 12 daily scheduled defrost times can be programmed in the CUB-II memory. The CUB-II executes defrost cycles at each scheduled time.
6.3.1. Defrost Termination
6.4.1. How Cut In/Cut Out Control Works
Cut In/Cut Out setpoints work differently depending upon whether the Cut In/Cut Out set­point is higher.
Cut In Higher Than Cut Out
The CUB-II allows for defrost termination based on temperature or suction pressure. Tem­perature termination can use either a digital defrost sensor (or Klixon) or an analog termina­tion sensor, whose value is compared to the ter­mination setpoint. Suction pressure termination will terminate a defrost cycle when the suction pressure rises above a programmed suction pres­sure termination setpoint.
Defrost cycles may be programmed with a minimum defrost time and a maximum defrost time.
6.4. Sensor Control
The CUB-II provides for up to two generic Cut In/Cut Out control algorithms for use in con­trolling subsystems related to the condensing unit. Each sensor control application consists of an input (or a set of inputs combined into a sin­gle value), a set of Cut In/Cut Out setpoints, and a digital output that is controlled by comparing the input to the setpoints.
Figure 6-1 - Cut In Setpoint Higher than Cut Out
When the Cut In setpoint is higher than the Cut Out setpoint, the Sensor Control output turns ON when the sensor input goes higher than the Cut In setpoint. The Sensor Control output remains ON until the input falls below the Cut Out setpoint, at which time the output turns OFF . (See Figure 6-1 for an illustration).
Typical uses for a sensor control application on a CUB-II include: refrigerant leak detection, motor room temperature control, and case lights.
Defrost Control MultiFlex CUB-II and CUB-TD Software Overview • 17
Page 28
Cut In Lower Than Cut Out
Figure 6-2 - Cut In Setpoint Lower Than Cut Out
When the Cut In setpoint is lower than the
Cut Out setpoint, the Sensor Control output turns ON when the sensor input goes lower than the Cut In setpoint. The Sensor Control output remains ON until the input rises above the Cut Out setpoint, at which time the output turns OFF . (See Figure 6-2 for an illustration).
read this value into Global Data as SPARE ANLG02. All other CUB-IIs that are assigned to zone 2 will read SPARE ANLG02 as the motor room temp.
6.4.2.1. Exhaust Fan Control
The CUB-II in each zone that is reading the motor room temp may also use the input to per­form Cut In/Cut Out control of a single output. This can drive an exhaust fan or similar HVAC device.
6.4.2.2. Example of a Motor Room Zone
Temperature Configuration
An example of how motor room temperature zone control is shown in Figure 6-1. In this example, there are two motor rooms with five CUB-IIs each. Each motor room has an exhaust fan that is controlled by the same CUB-II that has the motor room temp probe. This fan is con­trolled entirely by the individual CUB-II.
6.4.2. Motor Room Temperature Control
Part of the capabilities of sensor control involves the control of temperature in a motor room.
The CUB-II takes a “zone control” approach to controlling motor room temperature. All the CUB-IIs attached to a single E2 or Einstein can be divided into up to four “zones” (physically, up to four different motor rooms). In each zone, one CUB-II must be set up with a sensor control input designated as “Motor Room Temp.” This temperature value is shared with E2 or Einstein’ s Global Data handler, and passed back down through Global Data to all CUB-IIs that share the same zone number.
In an E2 or Einstein that has CUB-II boards attached to it, the Global Data values SPARE ANLG01 through SP ARE ANLG04 are reserved for motor room temperatures in zones 1-4. If, for example, a CUB-II in zone 2 has a “Motor Room Temp” sensor control input, E2 or Einstein will
The motor room temperature for Zones 1 and 2 are passed to E2 or Einstein as the Global Data values SPARE ANLG01 and SPARE ANLG02. All the CUB-IIs in Zone 1 except the one with the sensor will read the SPARE ANLG01 Global Data value as their zone’s motor room temp, and will display this value on their HHT status screens.
WARNING: If you are using CUB-IIs, you cannot use Global Data’s SPARE ANLG 01
through 04 inputs for any purpose other than motor room temperature control. If you need to use some of Global Data’s “Spare Analog” slots to share values between E2s or Einsteins, use SPARE ANLG 05 through 08.
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Resetting a High Discharge Trip
Resetting a high discharge trip safety mode can be done manually by closing the Alarm Reset input on the CUB-II or by resetting the High Discharge Trip alarm in the E2 or Einstein alarm log.
You can also program the CUB-II to auto­reset when the discharge pressure falls below the discharge trip setpoint minus a user-defined dif­ferential. This ensures the pressure will drop well below the trip setpoint before re-starting the compressor.
Figure 6-1 - Example of Zone Temperature Control Setup
6.5. Alarm Conditions (Safety Modes)
When certain conditions are detected, the
CUB-II and CUB-TD operate in a special mode (called Safety mode) in order to correct the con­dition or to prevent equipment, product, and/or energy loss. Safety mode alarm conditions can be reset two different ways:
1. Resetting the alarm in the E2 or Ein­stein Alarm Log will reset all active Safety mode alarms.
2. Defining an alarm reset input on the CUB-II, and then manually closing the input will reset all active Safety mode alarms.
6.5.1. High Discharge Trip Safety Mode
When using auto-reset, you may also set a maximum number of auto-reset attempts. The CUB will only attempt an auto-reset if it has not already auto-reset the CUB a number of times in the past hour equal to the user-defined maxi­mum. If CUB’s auto-reset maximum has already been met, it will remain in High Discharge Trip mode until it is manually reset.
6.5.2. Compressor Proof Fail Safety
Mode
If the CUB-II has a Compressor Proof input configured, it can use this input to verify the compressor is operating properly. Under normal conditions, the CUB-II will expect the proof input to mirror the state of the compressor at all times (i.e., proof registers ACTIVE when the compressor is ACTIVE, and INACTIVE when the compressor is INACTIVE). If the proof input does not mirror the value of the compressor state for a period of time longer than a user-defined period, the CUB-II will enter Proof Fail mode.
The CUB-II will always try to prevent the
condensing unit’ s dischar ge pressure from rising above a user-defined setpoint, called the dis- charge trip setpoint. If the discharge pressure ever rises above this setpoint, the CUB will enter the High Discharge Trip Safety mode. This will lock the compressor OFF, and cause the Circuit State of the CUB to display Rack Fail in the E2 or Einstein and HHT status screens.
Alarm Conditions (Safety Modes) MultiFlex CUB-II and CUB-TD Software Overview • 19
In Proof Fail mode, you may either choose to program the CUB-II to shut down the compres­sor until the failure is cleared, or to keep attempting to activate/deactivate the compressor as normal.
Page 30
Resetting a Compressor Proof Failure
Resetting a Compressor Proof Failure Safety mode can be done manually by closing the Alarm Reset input on the CUB or by resetting the Compressor Proof Fail alarm in the E2 or Einstein alarm log.
You can also program the CUB-II to auto­reset when the proof input state indicates the compressor is physically behaving as com­manded. When using auto-reset, you may also set a maximum number of auto-reset attempts. The CUB-II will only attempt an auto-reset if it has not already auto-reset the CUB-II a number of times in the past hour equal to the user­defined maximum. If CUB-II’s auto-reset maxi­mum has already been met, it will remain in Compressor Proof Fail mode until it is manually reset.
6.5.3. Compressor Oil Failure Safety
Mode
6.5.4. Phase Fail Mode
If a phase fail checking device is present on­site, the CUB-II can be programmed to shut down multiple-phase devices it controls.
To enable phase protection, a digital phase fail checking device must be connected to one of the CUB-II’s physical inputs. When this input signifies a phase failure has occurred, the CUB­II immediately shuts down the compressor, the condenser fans, and the defrost output. CUB-II will lock these devices OFF until the phase fail­ure is over.
NOTE: CUB-II will not lock out evaporator fans when a phase fail occurs, because these are single-phase devices.
6.6. Door Switches and Clean
The CUB-II can monitor compressor oil pressure using either an oil pressure transducer or a digital oil pressure switch. When a low oil pressure condition occurs, CUB-II can be pro­grammed to lock the compressor OFF to prevent equipment damage.
Resetting an Oil Failure
Resetting an Oil Fail Safety mode can be done manually by closing the Alarm Reset input on the CUB or by resetting the “Oil Failure” alarm in the E2 or Einstein alarm log.
You can also program the CUB-II to auto­reset when the oil failure input state indicates the oil pressure has returned to normal. When using auto-reset, you may also set a maximum number of auto-reset attempts. The CUB-II will only attempt an auto-reset if it has not already auto­reset the CUB-II a number of times in the past hour equal to the user-defined maximum. If CUB-II’s auto-reset maximum has already been met, it will remain in Oil Fail mode until it is manually reset.
(Wash) Switches
The MultiFlex CUB-II has special modes of operation to accommodate use of freezer door switches and clean (or wash) switches.
6.6.1. Door Switches
If the CUB-II is controlling refrigeration in a walk-in freezer or other case type that has a door switch equipped, the CUB-II may be pro­grammed to shut off the compressor and fans when the door is open. The CUB-II will lock the compressor and case fans OFF until the door is closed, at which time it will resume normal refrigeration control.
The CUB-II may be programmed with an alarm time and a fail-safe time. If the door is open longer than the alarm time, the E2 or Ein­stein controlling the CUB-II will generate an alarm to warn store personnel that the door has been left open. If the door is open longer than the fail-safe time, the CUB-II will resume refrigera­tion to prevent product loss.
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6.6.2. Clean (Wash) Switches
Some refrigerated cases may be outfitted with clean switches (also called “wash switches”) that disable all case systems so that they may be cleaned or serviced. The CUB-II will respond to a contact closure of a clean switch by locking the compressor, defrost, and case fans OFF for as long as the switch is active.
The CUB-II may be programmed with a fail­safe time to prevent the case from being in clean mode for too long. If this fail-safe time is passed, the CUB-II will resume normal control regard­less of the position of the clean switch.
Door Switches and Clean (Wash) Switches MultiFlex CUB-II and CUB-TD Software Overview • 21
Page 32
7 The MultiFlex CUB E2/
Einstein Interface
NOTE: In this section of the manual, the term "CUB" will be used to mean "CUB-II and, if appropriate, CUB-TD." Not every instruction and system setup in this section will apply to the
CUB-TD (only those related to TD condenser control).
The MultiFlex CUB-II and CUB-TD are
capable of communicating with an E2 (all ver­sions) or an Einstein RX refrigeration controller with software version 1.82 or above.
Using MultiFlex CUB-II and CUB-TD
boards with a central E2 or Einstein controller offers several benefits over simple stand-alone control, including:
• Reporting of CUB-related alarms in the Alarm Ad-
visory Log
• The ability to log CUB inputs in an E2 or Einstein
logging group
• The ability to share outside air temperature values
and control motor room temperature by sharing in­put values between the CUB and the E2 or Einstein
• Remote access to CUB status and programming
from both the E2 or Einstein front panel
• The ability to remotely access CUBs from
UltraSite32, and to back up, restore, and offline pro­gram CUB configuration along with E2 or Einstein site configuration
This task is performed in the Controller Setup screen. To access this screen:
Einstein E2
1. Log in to the Einstein.
2. Press
3. Press
4. Press
5. Enter the number of CUB
enter the total amount of both types of boards.
 to access
the System Configuration Menu.
- Network Sta-
tus/Setup
- Connected I/O
Boards & Controllers.
boards that will be net­worked with this Einstein in the CUB Controllers field.
NOTE: On the Network Setup screen, “CUB Controllers” refers to both CUB-IIs and CUB­TDs. If you have both CUB-IIs and CUB-TDs,
1. Log in to the E2
2. Press the MENU key.
3. Press
4. Press
5. Press
6. Enter the number of CUB
to navigate to
the System Configuration Menu.
to navigate to
the Network Status/Setup menu.
- Connected I/O
Boards & Controllers.
boards that will be net­worked with this Einstein in the CUB Controllers field.
Communication between E2 or Einstein and
a CUB takes place over the RS485 I/O Network. Follow the instructions in Section 3, The I/O Network, to connect the CUBs to the E2 or Ein­stein I/O Network. Then, follow the instructions in this chapter to set up the CUBs.
7.1. Adding/Deleting a CUB
7.1.1. Adding a CUB
Before an E2 or Einstein will communicate
with a CUB, it must be added as an I/O board.
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Figure 7-1 - Controller Setup Screen
If you have properly set up all MultiFlex CUB boards on this E2 or Einstein’s I/O Network, you can go view the status of the I/O Network (press
F10 or the key to go back to the menu, then
Page 33
press - Controller Status). If E2 or Einstein and the CUB boards are communicating, this screen will show the CUB boards as Online. If not, they will be shown as Offline.
7.1.2. Deleting a CUB
To remove a CUB from the E2 or Einstein:
7.2. Viewing the CUB Status Screen
Once you have added a CUB to the E2 or Ein­stein, you will be able to see the status of the CUB board(s) from the front panel.
Einstein E2
1. Log in to the Einstein.
2. Press
3. Press
4. Press
5. Change the number of
 to access
the System Configuration Menu.
- Network Sta-
tus/Setup
- Connected I/O
Boards & Controllers.
CUB boards in the CUB Controllers field to the correct number of boards.
1. Log in to the E2
2. Press the MENU key.
3. Press
4. Press
5. Press
6. Change the number of
to navigate to
the System Configuration Menu.
to navigate to
the Network Status/Setup menu.
- Connected I/O
Boards & Controllers.
CUB boards in the CUB Controllers field to the correct number of boards.
When CUBs are deleted in this way, E2 or Einstein will always delete the highest numbered CUBs first. Therefore, if you have seven CUBs (numbered 1-7) and you change the number of CUBs to five, the E2 or Einstein will delete board #6 and #7, leaving boards #1 through #5.
Einstein E2
1. From the Main Status Screen, press
MORE.
2. Press
- CUBs
If multiple CUBs are asso­ciated with this Einstein, a list will appear prompting you to select a single CUB. Use the arrow keys to highlight the CUB you wish to view, and press
 -
.
1. From the Main Status Screen, press the MENU
key and select
- Configured Applica­tions.
2. Press
to select "Multi-
Flex CUB" from the menu.
If multiple CUBs are asso­ciated with this Einstein, the CUB Summary Screen will be shown. To see a single CUB’s status screen, use the arrow keys to highlight the CUB you wish to view, and press
.
The CUB Status Screen for the CUB you se-
lected will appear (Figure 7-2).
Viewing the CUB Status Screen The MultiFlex CUB E2/ Einstein Interface • 23
Figure 7-2 - CUB Status Screen
The CUB Status Screen shows the current sta-
tus of all condensing unit systems. Though there
Page 34
is a large amount of information on a CUB status screen, status information is grouped on this screen in several groups of related information in order to make the screen easier to read. These groups are described below.
7.2.1. Inputs and Setpoints
Control Temp
If you are using the Temperature strategy to
control the compressor, the Control Temp field will show the current temperature value. You can compare this value to the temperature setpoint below it to determine if the compressor is sup­posed to be ON or OFF.
All the major control inputs for a CUB and the control setpoints are grouped together in the left side column of the screen.
Case Temp 1-6
The Case Temp fields numbered 1 through 6 show the current value of the case discharge air temperature sensors. If unused, NONE will be displayed in the field instead of a temperature value.
Safety Mode
The Safety Mode field will display whether the board has any active alarms or failures. If the system is functioning normally, this field will show OK. If there is a failure, it will display one of the Safety mode messages. Refer to Section
6.5., Alarm Conditions (Safety Modes) for more information about Safety modes.
•OK - No Safety mode failures.
• Phase Fail - A phase loss has been detected and all
systems have been shut down.
• Oil Fail - The compressor has failed due to low oil
pressure.
• Hi Disch Trip - Discharge pressure rose higher than
the discharge trip setpoint, causing refrigeration to shut down.
• Proof Fail - A compressor proof fail has occurred.
• Door Open Time - The door switch has been open
for longer than the programmed alarm time.
• Clean Time - The clean switch has been ON for lon-
ger than the programmed alarm time.
Control Type
For reference, Control Type shows whether this CUB is controlling the compressor based on the suction pressure or case temperature.
Temp Setpoint
This field shows the current case tempera­ture control setpoint, which is used in compres­sor control when using the Temperature strategy.
Suction press
This field shows the current suction pressure in the CUB. Note that if using the Pressure compressor control strategy, this is the control input for the compressor, which you can com­pare to the Cut In/Cut Out setpoints below it on the screen to determine if the compressor is sup­posed to be ON or OFF.
Min SP
This field shows the value of the Minimum Suction Pressure setpoint, which is used to shut the compressor OFF before the suction pressure can become too low. Min SP is used for Temper­ature Control or Pump Down.
Cut In and Cut Out
The Cut In/Cut Out setpoints are used to turn the compressor ON and OFF when the CUB is operating under the Pressure compressor control strategy . They are also used as fallback setpoints when the control temperature source fails under the Temperature strategy.
Disch temp
This field shows the current discharge tem­perature sensor if defined as one of the 16 CUB inputs.
Disch press
This field shows the current discharge pres­sure in the CUB.
Oil press
This field shows the current oil pressure in the CUB.
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Defrost Term Temp
This field shows the current value of the defrost termination sensor in the CUB, which may be a digital value (ON/OFF) for a Klixon type sensor or a temperature value, depending on the selected defrost termination type.
7.2.2. Sensor Control
The input and output information for the CUB sensor control applications is shown in the box in the bottom left corner of the screen, labeled AV01 and AV02 on the left side of the screen. Each row consists of three fields show­ing (1) the name given to the sensor control application, (2) the current input value (shown in the engineering units programmed for the sensor control application), and (3) the current sensor control output state.
7.2.3. Outputs and Operational
States
All the major control outputs for a CUB and information about case circuit and board online status are grouped together in the right side col­umn of the screen.
Ckt State
Circuit State shows the current state of the circuit. The states that may appear here are:
• Refrigeration - The CUB is in Refrigeration mode.
• Defrost - Refrigeration is OFF and defrost is active
in the circuit.
• Off - The refrigeration setpoint is satisfied and the
CUB is not refrigerating.
• Pump Down - Is a transition state where the CUB is
going from Refrigeration into Defrost or OFF, which allows refrigerant to be pumped out of the evaporator. Pump Down is an optional state. If en­abled, the two types are Idle Pump Down and De- frost Pump Down.
• Drip - The CUB is in an inactive state immediately
after Defrost that allows moisture to drip from the evaporator coils. Refrigeration will start immediate­ly after the Drip stage is complete.
• Cmp Delay - The CUB is in a user-programmed de-
lay period between the opening of the refrigeration solenoid and the activation of the compressor. This occurs when a CUB transitions from Off to Refrig-
eration.
Board #
Indicates the number of the CUB board
selected.
Board Status
This field shows the operational state of the
CUB board itself. If everything is operating nor­mally, this field will read Online.
MR Temp Zone 1-4
This field will show the temperature of the
motor room zone this CUB is assigned to.
Refrigerant
For reference, this will show the type of
refrigerant present in the condensing unit.
Sat Suct Temp
The saturation suction temperature is calcu­lated automatically for this condensing unit based on the refrigerant type and the current suc­tion pressure. The result of this calculation is shown in this field.
Suct Temp
The current temperature of the suction tem­perature sensor if defined as one of the 16 CUB inputs.
Compressor State
This field shows whether the compressor is ON or OFF.
Condenser Fans
These fields show the ON/OFF state of the condenser fan(s).
Drop Leg Temp
The current drop leg temperature used for TD control.
TD
The current value of the temperature differ­ential (drop leg temperature + drop leg offset - plenum temperature).
Defrost
This field shows the ON/OFF state of the defrost output.
Refr Sol
This field shows the ON/OFF state of the refrigeration solenoid.
Viewing the CUB Status Screen The MultiFlex CUB E2/ Einstein Interface • 25
Page 36
Evap Fan
This field shows the ON/OFF state of the
case circuit fans.
7.2.4. Defrost
Information about defrost for the CUB case lineup is shown in the fields at the bottom right side of the screen.
Peak Temp @ defrost
This field shows the highest case tempera­ture value recorded during the last defrost cycle.
Defrost Term Type
For reference, the Defrost Termination Type is displayed on this screen, showing the strategy that is being used to terminate defrost cycles. There are several possible values that can appear here:
• Time - Defrost always lasts the entire programmed
defrost duration.
• Digital - A digital temperature sensor will close to
terminate defrost.
• Term Temp - A dedicated analog temperature sen-
sor is being used to measure termination temp and compare it to the programmed termination setpoint.
• Min Case Temp - The lowest of all available case
temperature sensors is always used as the termina­tion temperature for purposes of comparing it to the termination setpoint.
• Suction Pressure - Defrost terminates when the suc -
tion pressure rises above a programmed setpoint.
• Case Temp 1-6 - One of the six possible case tem-
perature inputs is being used as the termination tem­perature for purposes of comparing it to the termination setpoint. The number shown indicates which Case Temp input is being used.
Defrost Term...
This field will change based on what the Defrost Termination Type (Term. Type in the Defrost Setup screen) is set to:
• Defr Term Act State: appears when Defrost Term Type is set to Digital.
• Blank: the field is blank when Defrost Term Type is set to Time. Time will appear in the Defrost Term Type field.
• Defr Term setpt: appears when the Defrost Term Type is set to Suction Pressure. This field will con­tain the suction pressure termination setpoint in
Pressure. During defrost, you can compare this set­point to the Suction press input value in the left­hand column.
• Defr Term Temp Setpt: appears when any other
Termination Type is selected (all other types are Temperature). Defrost Term Type will show the se­lected Temperature Termination Type.
Defrost Schedule
For reference, the Defrost Schedule pro­grammed for this CUB is shown at the bottom of the right side column in this screen. The sched­ule shows the times during each day that a defrost cycle will begin.
7.2.5. KW Usage
If a KW transducer is being used to measure the condensing unit’s power consumption, the KW consumption information measured by the CUB is shown in a pair of fields on the left side of the screen.
Current KW
This field shows the current reading of the KW transducer.
7.3. Programming The CUB Us-
ing the E2 or Einstein Front Panel
NOTE: If you are programming a CUB-TD from the E2 or Einstein front-panel interface, refer to Configuring Setpoints in E2 or Ein­stein for CUB-TD on page 64 for setup instruc-
tions specific to CUB-TD.
A CUB’s setpoints can be viewed and changed via the E2 or Einstein front panel inter­face. Programming a CUB using E2 or Einstein is similar in form to programming any other E2 or Einstein application, except changes made to CUB configuration are made directly to the CUB board’ s programming, not to the E2 or Ein­stein’s programming.
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To begin programming a CUB, navigate to
the CUB Status Screen for the board you wish to program (see Section 7.2.). For Einstein, press
followed by to enter the Setup Editor.
For E2, press
.
7.3.1. Screen 1: General
Figure 7-3 - Screen 1: General Screen
Name
Enter a name for this CUB in the Name
field.
Long Name
If desired, enter a 40-character description of
the CUB in the Long Name field.
Case Type
The Case Type field is used to assign default
setpoints for your circuit based on the case type. There are 64 case types to choose from, each with its own default temperature setpoint, defrost type, and defrost times. A complete list of case types is provided in Appendix B: Case Type Defaults on page 68. Use the Look-Up
Table ( case type.
Cntrl Strategy
compressor will be controlled by suction pres­sure or suction temperature. Use the Look-Up
Table ( for Einstein, for E2) to select Pressure or Temperature.
for Einstein, for E2) to select a
Control Strategy determines whether the
Cond Strategy
The Condenser Strategy determines whether
the condenser will be controlled by discharge
pressure (Pressure) or by temperature differen-
tial strategy (TD). Use the Look-Up Table (
for Einstein, for E2) to select a strategy.
Refr Type
The Refrigerant Type field is where the
type of refrigerant being used in the condensing
unit system must be specified. The CUB uses the
Refrigerant Type field to automatically calcu-
late saturation suction temperature. Use the
Look-Up Table ( for Einstein, for E2)
to select a refrigerant type.
Oil Protection
If set to ENABLE, the Oil Protection field
specifies whether an oil failure sensing device is
present for the condensing unit. If an oil pressure
transducer is available, set this field to
ENABLE. If oil pressure checking will not be
used for this CUB, set this field to DISABLE.
Comp Proof
The Comp Proof field specifies whether a
compressor proof checking device is present for
the condensing unit. If a compressor proof input
is available, set this field to ENABLE. If com-
pressor proof checking will not be used for this
CUB, set this field to DISABLE.
Phase Protect
The Phase Protect field specifies whether a
phase loss detection device is present for the
condensing unit. If a phase loss input is present,
set this field to ENABLE. If not, set this field to
DISABLE.
Door Switch
The Door Switch field specifies whether a
door switch is present on the condensing unit’s
case circuit. If a door switch input is available,
set this field to ENABLE.
Programming The CUB Using the E2 or Einstein Front Panel The MultiFlex CUB E2/ Einstein Interface • 27
Page 38
Wash Switch
The Wash Switch field specifies whether
this condensing unit has a clean switch to toggle the case circuit in and out of Wash mode. If a clean switch input is available, set this field to ENABLE.
Eng Units
Engineering Units determines whether engi­neering units for pressure values will be dis­played using English units (pounds per square inch (PSI) ) or metric units (kilopascals (KPA) ).
Temp units
Temperature Units determines whether engi­neering units for temperature will be displayed in degrees Fahrenheit or degrees Celsius.
Zone Assoc.
Zone Association allows you to assign this CUB to a zone along with other CUBs in the same motor room. This will cause the motor room temperature to be displayed on the CUB­II’s status screen in E2 or Einstein, and it also affects which of the “SPARE ANALOG OUT” Global Data inputs a motor room temperature sensor sends its value to (see Section 6.4.2., Motor Room Temperature Control, for an expla­nation of how this works).
Byp Failsafe Tm
Bypass failsafe time is the maximum amount of time the CUB will stay in Bypass mode (Ref Override On). This and any other bypass modes can be cancelled by issuing an End Manual mode.
Network Alm
This field specifies whether you want the CUB to set its alarm output if it goes offline.
Network Time
This field specifies whether you want the CUB to keep its own time clock synchronized with its parent controller’s clock. Set this field to ENABLE if you want CUB to synchronize its time with E2 or Einstein, or DISABLE if you don’t want time synchronization.
7.3.2. Screen 2: Setpoints
Figure 7-4 - Screen 2: Setpoints Screen
The Setpoints screen is where all setpoints related to compressor and condenser fan control are entered. The fields that appear on this screen depend largely on whether you set the Control Strategy in Screen 1 (Section 7.3.1.) to Pressure or Temperature and whether you set the Con- denser Strategy to Pressure or TD. The field descriptions below will indicate whether each field is visible for only the Pressure strategy, for only the Temperature strategy, or for both.
Cut In and Cut Out
If you are using the Pressure compressor control strategy, the Cut In setpoint determines the suction pressure that, when exceeded, will cause the compressor to turn ON. In this strat­egy, the compressor will remain ON until the pressure falls below the Cut Out setpoint, at which point the compressor will turn OFF.
If you are using the temperature compressor control strategy , these setpoints are used as a fall back if the MultiFlex CUB cannot determine the current case temperature. When this occurs, the suction pressure becomes the control input, and the CUB uses the Cut In and Cut Out setpoints to control the compressor.
Comb. method
The Comb. method field appears only for the temperature compressor control strategy.
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Page 39
The Combination Method determines how multiple case temperature sensors in the case cir­cuit will be combined into a single control tem­perature value for use in comparing to the temperature setpoint. There are five strategies to choose from:
• AVG - The average value of all case temperature in-
puts.
• MIN - The lowest sensor value of all the case tem-
perature inputs.
• MAX - The highest sensor value of all the case tem-
perature inputs.
• FIRST - The lowest numbered temperature sensor
that is reading a valid temperature.
• MIX - A mixture of the first two valid case temp
sensor values. The percentage at which these two sensor values are mixed is determined by the Mix% field.
Case Temp Mix
V isible only when the Comb Method is set to MIX, the Case Temp Mix field is the percent- age used to mix the values of Case Temp 1 and Case Temp 2. To mix the values, the CUB adds x% of Case T emp 1 to (100-x)% of Case Temp 2.
Temp Setpt
The temperature setpoint is the circuit tem­perature to which the CUB will attempt to con­trol the cases. Along with the temperature deadband, the CUB uses this setpoint to deter­mine when refrigeration is needed. Refer to Sec-
tion 6.1.2., Case Temperature Compressor Control, for more on how the temperature set-
point works.
Temp Deadband
The temperature deadband is a range of tem­peratures equally above and below the setpoint within which the case circuit temperature is con­sidered to be acceptable. While within this range, the compressor will remain in its current state until the temperature input value triggers a change by moving above or below the deadband range. Refer to Section 6.1.2., Case T emperatur e Compressor Control, for more on how the tem­perature setpoint works.
Min ON time
The Minimum ON Time is the amount of time the compressor must remain ON after acti­vation before being allowed to turn OFF. Enter the desired minimum ON time in hours:min­utes:seconds (H:MM:SS) format.
Min OFF time
The Minimum OFF Time is the amount of time the compressor must remain OFF after deactivation before being allowed to turn ON. Enter the desired minimum OFF time in hours:minutes:seconds (H:MM:SS) format.
Idle Pump Down
The Idle Pump Down field appears only if using the temperature compressor control strat­egy.
The Idle Pump Down field enables or dis­ables the pump down delay that occurs in between refrigeration and idle (off). If set to ENABLE, the CUB will turn the refrigeration solenoid output OFF and leave the compressor ON until the suction pressure is below the Mini­mum Suction Pressure setpoint, or when Maxi­mum Pump Down time expires. This effectively pumps refrigerant out of the coil.
If set to DISABLE, the CUB will transition from refrigeration to idle with no pump down cycle.
Max pumpdown
The Max Pump Down time is the maximum amount of time a Pump Down delay period will last if it is not terminated prematurely by the suction pressure falling below the Minimum Suction Pressure value.
Ref/Comp ON Delay
This field appears only if using the tempera­ture compressor control strategy and only if Idle Pump Down is set to ENABLE.
The Ref/Compressor ON Delay affects how long the CUB will wait after opening the refrig­eration solenoid at the start of refrigeration before activating the compressor. Enter the desired delay in hours:minutes:seconds (H:MM:SS) format.
Programming The CUB Using the E2 or Einstein Front Panel The MultiFlex CUB E2/ Einstein Interface • 29
Page 40
Min Suct Press
The Minimum Suction Pressure setpoint serves two purposes. When the condensing unit is operating in Refrigeration mode using the Temperature strategy, the Minimum Suction Pressure is the suction pressure at which the compressor will be shut off regardless of the case circuit temperature. This setpoint is neces­sary as a safety feature since the CUB is control­ling by temperature instead of by suction pressure.
If you enabled the Pump Down delay feature for this CUB, the Minimum Suction Pressure also acts as the termination setpoint for the pump down delay. The Pump Down delay period will end when the suction pressure falls below this setpoint.
7.3.2.1. Temperature Differential (TD)
TD setpoint
The temperature differential setpoint is the minimum allowable difference between the refrigerant drop leg temperature and the ambient (plenum) temperature. When the TD (i.e., drop leg temp + drop leg offset - plenum temp) begins to climb above this setpoint, fans will be cycled ON to bring down the drop leg temperature (thus lowering the TD measurement).
TD deadband
The temperature differential deadband is a range of values around the TD Setpoint within which the value of the TD calculation is accept­able. When the TD rises above the setpoint plus 1/2 the deadband value, fans will begin cycling ON. When the TD falls below the setpoint minus 1/2 the deadband value, fans will cycle OFF.
Drop Leg Max
The Drop Leg Max setpoint is the maximum allowable value of the drop leg temperature. If the drop leg temperature rises above this set­point, the CUB will cycle condenser fans ON regardless of the value of the TD.
Drop Leg Min
The Drop Leg Min setpoint is the minimum allowable value of the drop leg temperature. If the drop leg temperature falls below this set­point, the CUB will cycle condenser fans OFF regardless of the value of the TD.
Cond Fan On Dly
If using TD control, the CUB cycles fans ON when the TD is above the setpoint at the rate set in the Cond Fan On Dly field. In other words, if this field is set to 30 seconds, then the CUB-II will stage each fan ON in 30-second intervals until all fans are ON or until the TD falls back below the setpoint.
Cond Fan Of Dly
If using TD control, the CUB cycles fans OFF when the TD is below the setpoint at the rate set in the Cond Fan Of Dly field. In other words, if this field is set to 30 seconds, then the CUB will stage each fan OFF in 30-second inter­vals until all fans are OFF or until the TD rises back above the setpoint.
7.3.2.2. Traditional Strategy
Fan 1 Cut In
Fan 1 Cut In sets the activation setpoint for condenser fan #1. When the discharge pressure rises above the Cut In setpoint, the fan will turn ON.
Fan 1 Cut Out
Fan 1 Cut Out sets the deactivation setpoint for condenser fan #1. When the discharge pres­sure falls below the Cut Out setpoint, the fan will turn OFF.
Fan 1 Minimum ON Time
The Fan 1 Minimum ON time is the smallest amount of time condenser fan #1 must remain ON after being activated.
Fan 2 Cut In
Fan 2 Cut In sets the activation setpoint for condenser fan #2. When the discharge pressure rises above the Cut In setpoint, the fan will turn ON.
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It is recommended you program this fan with a higher Cut In setpoint than condenser fan #1, so that this fan will come on as a second stage.
Fan 2 Cut Out
Fan 2 Cut Out sets the deactivation setpoint for condenser fan #2. When the discharge pres- sure falls below the Cut Out setpoint, the fan will turn OFF.
Fan 2 Minimum ON Time
The Fan 2 Minimum ON time is the smallest amount of time condenser fan #2 must remain ON after being activated.
This input is automatically configured, and is
primarily displayed in this screen as a reference.
REMOTE INPUT
The Remote Input is passed to any of the CUB’s outputs that are set up as “Remote” type outputs. When this input is tied to a digital out­put from another E2 or Einstein application, it will cause all “Remote” outputs on the CUB board to mirror the digital state of the digital out­put.
Enter the controller, application, and prop­erty address of the remote input in this field.
7.3.3. Screen 3: Inputs
Figure 7-5 - Screen 3: Inputs Screen
The Inputs screen is where special data shar­ing connections between the CUB and E2 or Einstein must be set up for motor room control, outside air temperature sharing with Global Data, and reading remote inputs from the CUB board that may be read by other E2 or Einstein applications.
PLENUM TEMP
The plenum temperature input provides the CUB the current value of the ambient tempera­ture used for TD calculation.
Because plenum temperature will likely be measured by one temp sensor and will be shared with multiple CUB-IIs and CUB-TDs, it is rec­ommended the plenum temperature sensor itself is physically connected to Global Data’s Spare Analog inputs, and the plenum temperature input definition be set up to receive its value from Global Data. Refer to Set Up Motor Room Tem-
perature and Plenum Temperature Inputs on page 62 for special instructions on setting up
plenum temperature in Global Data.
MOTOR RM TEMP
This input name will have a number after it from 1-4, which is the same number as the motor room zone number you programmed for this CUB in Screen 1. This input reads from the par­ent E2 or Einstein’ s Global Data the value of the motor room temperature, provided there is a CUB in the zone with a motor room temperature sensor.
Programming The CUB Using the E2 or Einstein Front Panel The MultiFlex CUB E2/ Einstein Interface • 31
Page 42
7.3.4. Screen 4: Aux Inputs
Figure 7-6 - Screen 4: Aux Inputs Screen
The Aux Inputs screen is used to set the
characteristics of certain input types that may be required by the MultiFlex CUB.
Specifically, if you are using power trans-
ducers, you must enter information in this screen that helps the CUB translate the KW transducer signal into a KW value.
Linear 1 and Linear 2 Fields
If you wish to use a sensor type not directly supported by the CUB, and the sensor type has an output voltage between 0 and 5 volts DC, you may assign this sensor one of the two Linear sensor types (Linear 1 and Linear 2). You may then connect the sensor to a point on the CUB and designate the point as sensor type Linear 1 or Linear 2 (see Section 7.3.3., Screen 3: Inputs).
To configure one of the Linear sensor types, you must enter values for each of the four fields:
• Minimum Out - The smallest possible value of the
sensor’s input value. Enter this number in the engi­neering units you will be using for this input.
• Maximum Out - The largest possible value of the
sensor’s input value. Enter this number in the engi­neering units you will be using for this input.
• Minimum Volts - The raw voltage value of the sen-
sor that corresponds to the value you entered in the Min Out field.
• Maximum Volts - The raw voltage value of the sen-
sor that corresponds to the value you entered in the Max Out field.
Also, if you are using a linear sensor type that is not supported by the CUB, you can assign it to one of the three spare Linear sensor types. You must enter the voltage and output ranges for each Linear sensor type if you wish to do this.
KWH Per Pulse
If you are using a pulse accumulation type KW transducer, you must enter the number of KWH per pulse for this transducer in this field. Otherwise, leave this field set to NONE.
KW Analog Min and Max / KW Min Volts and Max Volts
If you are using an analog KW transducer, you must enter the voltage range of the input and the range of KW values the voltage corresponds to. This information is different for each KW Transducer and depends on the line voltage and current transducer (CT) rating. Refer to your KW transducer’s installation instructions.
7.3.5. Screen 5: CUB Inputs
Figure 7-7 - Screen 5: CUB Inputs
The CUB Inputs screen is where you specify the type and functions of all the sensors, trans­ducers, and contact closures connected to the MultiFlex CUB.
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There are sixteen rows on this screen labeled from #1 to #16, corresponding to the input points on the MultiFlex CUB board. For each input that has an input device connected to it, configure the Input, Type, and Offset fields.
Input
The Input field is where you must specify the function of the input device attached to the point. With the cursor in this field, use the Look-
Up T able (press
for Einstein, for E2) to
choose one of the inputs supported by the CUB.
Name Description
Suct Press Suction pressure transducer Discharge Press Discharge pressure transducer Oil Press Analog oil pressure transducer Case 1 Temp-Case 6
Temp Dropleg Temp Drop Leg Temp for TD condenser
Defr Term Temp Analog termination temperature sen-
Defr Term Dig Digital defrost termination sensor
Alarm Reset Alarm reset button or switch Door Switch Door switch Clean Switch Clean switch Discharge Temp Discharge temperature Sensor Control 1-2 Input for Sensor Control modules #1
Compressor Proof Compressor proof Phase Loss Phase loss checking device KW KW input (analog or digital) Suction Temp Suction Temperature Probe Oil Digital Digital oil failure pressure switch
Table 7-1 - MultiFlex CUB Input Names
Case temperature sensors #1 through #6
control
sor (NOT digital — use Defrost Term Sensor for digital sensors)
(NOT analog — Use Term Temp for analog termination sensors
and #2
Type
The Type field tells the CUB what kind of
sensor is providing the input value. This value of this field must correspond to the type of input suggested by the Input field. For example, if the name of an input is Suct Temp, CaseTemp1, or one of the other analog temperature sensor types, the Type field must be set to Temperature in order for the input signal from the sensor to be read like a temperature sensor.
Note that when you choose a value for the
Input field, the CUB does not automatically enter an appropriate default value in the Type field. You must manually enter the type for all sensor inputs.
Table 7-2 lists the input types that may be
chosen in this field:
Input Type Description
Temperature Analog temperature sensor 12v-100PSI 12v transducer, 0-100PSI 12v-200PSI 12v transducer, 0-200PSI 12v-500PSI 12v transducer, 0-500PSI 5v-100PSI 5v transducer, 0-100PSI 5v-200PSI 5v transducer, 0-200PSI 5v-500PSI 5v transducer, 0-500PSI Ref Leak Refrigerant Leak Detector Light Level Light Level Sensor Linear 0-5 V linear sensor Humidity Relative Humidity Sensor KW Pulse Kilowatt transducer, pulse KW out-
put signal
KW Analog Kilowatt transducer, 1-5VDC analog
output signal Dewpoint Dewpoint Probe LM235-TEMP LM235 Temp Probe Digital Digital ON/OFF signal
Table 7-2 - CUB Sensor Control Input Types
You may choose to have multiple inputs assigned to the same Sensor Control module. These inputs will be combined by the CUB’s sensor control application using the strategy chosen in Sensor Control.
Programming The CUB Using the E2 or Einstein Front Panel The MultiFlex CUB E2/ Einstein Interface • 33
To choose a sensor type, move the cursor
into the Type field and use the Look-Up Table (press
for Einstein, for E2).
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Offset
The Offset field allows you to calibrate a
sensor by adjusting the raw sensor value by a fixed amount. The value entered in the Offset field will always be added to the raw sensor value in the engineering units designated for that sensor.
An offset can also be used to subtract from a
raw sensor value. To do this, enter a negative value in the Offset field.
7.3.6. Screen 6: Defrost
Figure 7-8 - Screen 6: Defrost Screen
Defrost Type
Choose the manner in which the case circuit
will be defrosted in the Defrost Type field. There are two options:
• Off Cycle - Refrigeration will be disabled during de-
frost, and no heat will be directly applied to the evaporator.
• Electric - Refrigeration will be disabled during de-
frost, and electric heat will be applied to the evapo­rator.
Defr Pump Down
Enabling Defrost Pump Down causes the
CUB to delay transition from Refrigeration to Defrost to allow refrigerant to be pumped out of the evaporator.
Term. Type
The Termination Type determines which sensor’s value will be used to determine when a defrost cycle must be terminated. There are six options:
• Digital - Digital temperature sensor (Klixon).
• Term Temp - Analog temperature sensor. Defrost
will terminate when the temperature is above the ter­mination temp setpoint.
• Time - Defrost will terminate when defrost time ex-
pires (this is the same as no termination).
• Min Case Temp - Instead of using a dedicated
“Term Temp” sensor, the CUB will use the lowest value among all case temperature sensors as the de­frost termination temperature value.
• Suction Pressure - The suction pressure transduce r.
Defrost will terminate when suction pressure rises above the termination pressure setpoint.
• Case Temp 1-6 - Instead of using a dedicated “Term
Temp” sensor, the CUB will use one of the six case temperature sensors as the termination sensor during defrost.
Suction Term
If you selected Suction Pressure as the Ter­mination Type, the Suction Term field will appear on this screen. Enter the suction pressure that, when exceeded by the suction transducer, will cause defrost to terminate.
Fans dur def
Fans During Defrost determines the state of the case circuit evaporator fans when defrost is active for the circuit. Set this field to ON to turn the case fans ON during defrost, or OFF to turn the case fans OFF.
Fans at idle
This field determines the state of the case circuit evaporator fans when the case tempera­ture setpoint is satisfied and refrigeration is not active in the case. Set this field to ON to leave the case fans ON during idle, or OFF to turn the case fans OFF.
To enable the Pump Down Delay, set this
field to ENABLE. To disable the Pump Down Delay, set this field to DISABLE.
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Fan ON Dly
This parameter delays the amount of time the CUB will wait after a defrost has ended before turning on the evaporator fans. This delay is designed to keep the fans from blowing moisture off the coil and onto the case doors or walls. Enter the desired delay in hours:minutes:seconds (H:MM:SS).
Defrost Dur.
The Defrost Duration is the maximum amount of time a defrost cycle will last. Unless it is prematurely terminated by temperature or suc­tion pressure, a defrost cycle will end when it has been in defrost for an amount of time equal to this field (not including any pump down or drip delays).
Enter the desired Defrost Duration in hours and minutes (HH:MM).
Min Defr Time
The Minimum Defrost Time sets the mini­mum amount of time a defrost cycle will last. A defrost cycle will always last at least as long as this time, and will ignore all calls for defrost to terminate until the Minimum Defrost Time has elapsed.
Enter a number from 1 through 12 in this field. When you enter a number, the appropriate number of Defrost Time fields will appear under this field. Use these fields to enter the start times for each daily defrost cycle.
Defr Temp Setpt
If you selected Term Temp, Min Case Temp, or Case Temp 1-6 as the Termination
Type, the Defr Temp Setpt field will appear on this screen. Enter the case temperature that, when exceeded by the value of the termination sensor, will cause defrost to terminate.
7.3.7. Screen 7: Outputs
Enter the desired Defrost Duration in hours
and minutes (HH:MM).
Drip Time
The Drip Time is a delay between the end of defrost and the resuming of refrigeration to allow excess moisture to drain from the evapora­tor coil.
During the drip time, both the refrigeration and defrost outputs will be OFF. When the drip time has elapsed, refrigeration will resume in the case circuit.
Enter the desired drip time, in minutes, in this field.
Number of Defrost Schedules and Defrost Time
The Number of Defrost Schedules sets the number of daily defrosts for this circuit. This field is automatically filled in for you when you select a case type in the Case Type field.
Figure 7-9 - Screen 7: Outputs Screen
Because the CUB has limited memory to log inputs and outputs, and because it has no ability to do customized advanced controls that may be required by certain sites, the E2 or Einstein makes all CUB input, output, and state values available as outputs. This allows you to log CUB inputs or outputs, to set up alarms for the CUB outside of its own alarm control capabilities, and to share CUB values with other E2 or Einstein applications.
You will not need to use this screen at all unless you are setting up advanced-level log­ging, alarming, or controls that involve the CUB inputs and outputs.
Programming The CUB Using the E2 or Einstein Front Panel The MultiFlex CUB E2/ Einstein Interface • 35
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The descriptions below describe what the purpose of each output shown on this screen are. For each output definition, you may:
• Share the value with another E2 or Einstein in- put - Enter a controller/application/input address in
the output definition, or press O Formats to change the definition to a board/point
or fixed value.
• Set up logging or change logging parameters ­Move the cursor into the output definition, and nav-
igate to the Logging Setup screen ( stein,
• Set up generic alarming for a parameter - Move the cursor into the output definition, and navigate to
the Generic Alarm Setup screen (press Einstein,
SUCTION PRESS
in E2).
in E2).
 - Alternate I/
 in Ein-
 in
The current value of the CUB suction pres-
sure input.
SATUR SUCT TEMP
The calculated value of the saturation suc-
tion temperature of the condensing unit system.
DISCHARGE PRESS
The current value of the CUB discharge
pressure input.
DROP LEG TEMP
The current drop leg temperature used for
TD Condenser Control.
TD
The current value of the temperature differ­ential (drop leg temperature + drop leg offset - plenum temperature).
OIL PRESS
The current value of the CUB oil pressure input.
CKT STATE
The current CUB refrigeration state. The options are: Idle, Refrigeration, Defrost, Drip, Pump Down, Wash, Door, Fail, or Delay.
CASE TEMP 1 - 6
The six CASE TEMP outputs are equal to the values of each of the six possible CUB case temperature inputs. CASE TEMP 1 corresponds to CUB’s case temp #1, etc.
CURRENT KW
The current value of the CUB KW input.
BOARD STATUS
The online or offline network status of the
CUB board.
CASE TEMP COMBO
The current combined value of all CUB case temperature inputs. This will be the same as CASE TEMP 1 if only one case temp sensor is present on the CUB.
DOOR SWITCH
The current ON/OFF state of the door switch.
PEAK TEMP
The highest case temperature recorded dur­ing the previous defrost cycle.
CLEAN SWITCH
The current ON/OFF state of the clean switch.
DISCH TEMP
The current value of the CUB discharge tem­perature.
AN SENS #1 and #2
The values of sensor control inputs #1 and #2. If a Sensor Control input on the CUB is set to OAT or motor room temp, this definition will be pre-defined to point to Global Data’s OAT or SPARE ANLG 1-4 inputs. DO NOT change the values of these fields if they are already pointing to Global Data.
COMP PROOF
The current OK-FAIL state of the compres­sor proof.
PHASE LOSS
The current OK-FAIL state of the phase pro­tection device.
SUCTION TEMP
The current value of the CUB’s suction tem­perature sensor.
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SAFETY MODE
When certain conditions are detected, the CUB and CUB-TD operate in a special mode called Safety mode. The options are: OK, Phase­Fail, OilFail, HiDischTrip, ProofFail, DoorO­penTime, CleanTime.
CONTROL TYPE
The active compressor control type.
DIG OIL FAIL
The current value of the CUB’s oil failure input.
COMPRESSOR
The current ON/OFF state of the compressor .
COND FAN 1 through COND FAN 4
The current ON/OFF state of condenser fans #1 through #4.
DEFR CONTACT
The current ON/OFF state of the CUB defrost output.
REFR SOL
The current ON/OFF state of the CUB refrigeration output (which drives the refrigera­tion solenoid).
EVAP FAN
The current ON/OFF state of the CUB evap­orator fan output.
ALARM
The current ON/OFF state of the CUB alarm output.
7.3.8. Screen 8: CUB Outputs
Figure 7-10 - Screen 8: CUB Outputs Screen
This screen configures the functions of the eight relay outputs on the MultiFlex CUB. By default, the compressor, defrost, condenser fan #1, and alarm outputs are pre-configured to points 1,2,3, and 8 respectively. You may assign other outputs to the remaining relay output points or change the default configuration using this screen.
The Outputs screen has eight numbered out­puts corresponding to relays #1 through #8 on the CUB board. For each relay to be used by the CUB, you must choose the output type in the corresponding field.
The output choices are:
SENS CTRL 1 and SENS CTRL 2
The current ON/OFF state of the digital out­puts driven by the CUB sensor control applica­tions.
REMOTE OUT
The current ON/OFF state of the CUB remote output.
Programming The CUB Using the E2 or Einstein Front Panel The MultiFlex CUB E2/ Einstein Interface • 37
• Compressor - The condensing unit’s compressor.
• Condenser Fan #1 - The first condenser fan.
• Condenser Fan #2 - The second condenser fan, if
one is being used for the condensing unit.
• Condenser Fan #3 - The third condenser fan, if one
is being used for the condensing unit.
• Condenser Fan #4 - The fourth condenser fan, if
one is being used for the condensing unit.
• Defrost Contactor - The defrost outp ut, which is ac-
tivated when the case circuit is in defrost.
• Refrigeration Sol. - The condensing unit’s refriger-
ation solenoid valve.
• Evaporator Fan - The fans in the case circuit.
• Alarm - The alarm output, which turns ON when an
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alarm is active in one or more CUB systems.
• Sens Ctrl 1 - Sens Ctrl 2 - The two Sens Ctrl outputs
for Sensor Control applications #1 and #2.
• Remote Output - A generic remote output type that
may be addressed by an application in the CUB’s parent E2 or Einstein.
7.3.9. Screen 9: Sensor Control
Figure 7-11 - Controller Setup Screen
This screen is where the MultiFlex CUB’s
sensor control applications are programmed. Up to two sensor control applications may be pro­grammed, each with its own set of inputs, set­points, and outputs.
There are two headings for the fields on this
screen, labeled Sensor Cntrl 1 and Sensor Cntrl 2. The indented fields under each of these headings represents all the necessary fields for that sensor control application. Each of these field descriptions will have a 1 or a 2 at the end of their name to indicate whether the field applies to application #1 or #2.
Sensor Cntrl
Enter a name for the sensor control applica-
tion in this field.
Type
The Type field tells the CUB if the sensor
that is supplying the input for this sensor control application serves a special purpose or has spe­cial characteristics. This is not the same thing as Sensor Type, which is chosen by altering the Input Type in the Inputs screen (Section 7.3.3.).
Select one of the following types:
Input Type Description
Generic The sensor control application exists
simply to control an output and to generate hi/lo alarms.
OAT Choose this option if the input is
reading outdoor air temperature. This will allow the CUB to share the OAT value with E2 or Einstein for use in other applications.
MotorRM T Choose this option if the input is an
air temperature sensor in the CUB’s motor room. This passes the sensor value to E2 or Einstein’s Global Data for sharing with other CUBs in the same zone.
Linear 1 The sensor connected to this input
uses the linear properties for volts and engineering units specified in Screen 4, Auxiliary Inputs, for "Linear 1".
Linear 2 The sensor connected to this input
uses the linear properties for volts and engineering units specified in Screen 4, Auxiliary Inputs, for "Linear 2".
Ref. Leak The sensor is a refrigerant leak detec-
tor.
Light Level The sensor is a light level sensor.
Comb Mthd
The Combination Method only applies if you assigned more than one input to this Sensor Con­trol application. When multiple inputs are being used, they will be combined into a single input value using the method chosen in this field.
If you are not using more than one input, set the Comb Mthd field to None.
Cut In
The Cut In setpoint is the point at which the sensor control output will transition from OFF to ON. Refer to Section 6.4.1., How Cut In/Cut Out Control Works, for further explanation.
Cut Out
The Cut Out setpoint is the point at which the sensor control output will transition from ON to OFF. Refer to Section 6.4.1., How Cut In/Cut Out Control Works, for further explanation.
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Min ON Tm
The Minimum ON Time is the amount of time this sensor control output must remain ON after activating before being allowed to turn OFF. Enter the desired time in hours:min­utes:seconds format (H:MM:SS).
Alarm Pri
Alarm Priority sets the alarm priority level of the high and low alarms generated for this sensor control application. The priority level is used to filter the alarm and determine how E2 or Ein­stein will react to and report the alarm.
Min OFF Tm
The Minimum OFF Time is the amount of time this sensor control output must remain OFF after deactivating before being allowed to turn ON. Enter the desired time in hours:minutes:sec­onds format (H:MM:SS).
Alarm Hi
Alarm Hi sets the high alarm setpoint for this Sensor Control application. Whenever the sensor control input rises above the Alarm Hi setpoint, an alarm will be generated in the parent E2 or Einstein.
If you do not wish to generate a high alarm, leave this field set to NONE.
Alarm Hi Delay
Alarm Hi Delay is the amount of time the sensor control input must remain above the Alarm Hi setpoint before a high alarm will be generated. Enter the desired alarm delay in hours:minutes:seconds (H:MM:SS).
Alarm Lo
Alarm Low sets the low alarm setpoint for this Sensor Control application. Whenever the sensor control input falls below the Alarm Lo setpoint, an alarm will be generated in the parent E2 or Einstein.
If you do not wish to generate a low alarm, leave this field set to NONE.
Alarm Lo Delay
Alarm Lo Delay is the amount of time the sensor control input must remain below the Alarm Lo setpoint before a low alarm will be generated. Enter the desired alarm delay in hours:minutes:seconds (H:MM:SS).
Enter a priority level from 1 (highest) to 99 (lowest) in this field. T ypically, an alarm-level or failure-level advisory has a priority level of 20­30, while a notice-level advisory has a priority level of 99.
7.3.10.Screen 10: Alarms
Figure 7-12 - Controller Setup Screen
This screen is where you configure the alarm setpoints for the pre-programmed alarm types supported by the CUB.
7.3.10.1. Oil Failure Alarm Setpoints
If Oil Protection is set to ENABLE under the General tab in Setup, the MultiFlex CUB can generate an oil failure alarm when the compres­sor’s oil pressure transducer registers low oil readings.
Oil Fail Type
Choose the type of input device used to check oil pressure on the condensing unit. Choose Pressure if using an analog pressure transducer, Digital if using a digital pressure switch, or None if you do not wish to generate oil failure alarms.
Programming The CUB Using the E2 or Einstein Front Panel The MultiFlex CUB E2/ Einstein Interface • 39
Page 50
Oil Fail Setpt
If you chose Pressure as the Oil Failure
T ype, the Oil Failure Setpoint is the pressure that indicates a low oil condition in the compressor. When the oil pressure falls below this setpoint for Oil Failure Delay, a compressor oil failure alarm will be generated.
Oil Fail State
If you chose Digital as the Oil Failure Type,
the Oil Fail State is the state of the digital pres­sure switch that indicates a low oil condition. When the digital input transitions to this state for Oil Failure Delay, a compressor oil failure alarm will be generated.
Oil Fail Delay
The Oil Failure Delay is the amount of time an analog oil pressure transducer must be below the setpoint, or a digital pressure switch must be in the fail state, before an alarm will be gener­ated.
Analog Auto Rst
If you chose Pressure as the Oil Failure T ype, the Analog Auto Rst field sets the number of times the CUB will attempt to reset the oil failure by turning the compressor OFF for the Reset Delay, and then ON. If the oil sensor still registers a failure after all retries have occurred, the CUB will consider the compressor failed and will not attempt another reset.
Enter a number of retries from 0-2.
Dig. Auto Reset
If you chose Digital as the Oil Failure Type, the Auto Resets field sets the number of times the CUB will attempt to reset the oil failure by turning the compressor OFF for the Reset Delay , and then ON. If the oil switch still registers a failure after all retries have occurred, the CUB will consider the compressor failed and will not attempt another reset.
Enter a number of retries from 0-2.
Reset Delay
The Reset Delay is the amount of time the CUB will wait between retry attempts. Enter the desired reset delay in hours:minutes:seconds (H:MM:SS) format.
Oil Xducer Run
This field determines whether the CUB will continue to attempt to control the compressor as normal even after an oil failure has occurred. If this field is set to Yes, the CUB will turn the compressor output ON and OFF as normal dur­ing an oil failure. If set to No, the CUB will attempt the auto resets described above. If after the auto resets the compressor has an oil failure, a reset from the E2 or Einstein or CUB will be required to clear the oil failure.
7.3.10.2. Discharge Pressure Alarm
The CUB can be programmed with up to two levels of discharge pressure alarm notification. A Discharge Pressure Alarm setpoint may be programmed to generate an alarm when the pres­sure rises too high. A Discharge Trip Setpoint may also be programmed to shut down the com­pressor when the discharge pressure reaches unsafe levels.
Disch Pr Alarm
Enter the discharge pressure level tha t, when exceeded, will cause a discharge pressure alarm to occur.
Disch Pr Trip
Enter the discharge pressure level tha t, when exceeded, will cause a system shutdown. The Discharge Trip setpoint should be higher than the Discharge Pressure Alarm setpoint.
Disc Reset Diff
A condensing unit that has been shut down due to Discharge T rip can be automatically reset. The Discharge Auto Reset is the pressure level the discharge pressure must fall to in order for the CUB to attempt a reset. When the pressure reaches this setpoint, the CUB will restart the system.
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Num Auto Reset
The Num Auto Reset field sets the number
of attempts the CUB will make to automatically reset the system after a discharge trip shutdown has occurred. After all attempts have been made and the discharge trip is still occurring, the CUB will lock the compressor OFF until the system is manually reset.
Enter a number of retries from 0-2.
Disch Reset Dly
The Reset Delay is the amount of time the CUB will wait in between restarts to try to reset the discharge trip condition. Enter the desired delay in hours:minutes:seconds (H:MM:SS) for­mat.
7.3.10.3. High/Low Suction Pressure
Alarms
The MultiFlex CUB can be programmed to generate alarms when the suction pressure rises too high or falls too low.
Suct Hi Setpt
The Suct Hi Setpoint alarm setpoint is the suction pressure level that, when exceeded, will generate a suction pressure alarm. Enter the desired pressure in this field.
NOTE: This alarm will not be generated when the system is in defrost.
Suct Pr Alm Dly
The High Suction Pressure Alarm Delay is the amount of time the suction pressure must remain above the high suction pressure alarm setpoint before an alarm will be generated. Enter the desired delay in hours:minutes:seconds (H:MM:SS) format.
Suct Lo Setpt
The Suct Lo Setpt alarm setpoint is the level the suction pressure must fall below before a low suction pressure alarm will be generated. Enter the desired pressure in this field.
NOTE: This alarm will not be generated when the system is in Pump Down mode.
7.3.10.4. Compressor Proof Alarms
If a digital compressor proof checking device is available, the CUB can alarm on com­pressor failure and attempt to auto-reset the compressor.
Comp Proof Dly
The Compressor Proof Delay is the amount of time a proof checking device must read FAIL before the CUB will consider the compressor to have failed. Enter the desired delay in hours:minutes:seconds (H:MM:SS) format.
Proof Act State
The Proof Act State field tells the CUB what digital state from the proof checking device means FAIL. If set to CLOSED, the CUB will interpret a contact closure as FAIL. If set to OPEN, the CUB will interpret an open contact as FAIL.
Proof Shutdown
When the compressor fails, you have the option of either having the CUB control the compressor output as normal OR having the CUB lock the compressor OFF until the failure is reset. Set this field to YES if you want to lock the compressor OFF during failure. Set this field to NO if you want the CUB to continue attempt­ing to control the compressor as normal.
Proof Rst Delay
The Proof Reset Delay is the amount of time the CUB will wait between retry attempts. Enter the number of seconds, from 0 to 240, in this field.
Proof Auto Rsts
Proof Auto Resets determines how many times the CUB will attempt to automatically reset the compressor failure. After the retries have occurred, if the compressor is still failed, the CUB will consider the compressor failed until the compressor is reset manually.
Programming The CUB Using the E2 or Einstein Front Panel The MultiFlex CUB E2/ Einstein Interface • 41
Page 52
Enter the desired number of resets in this
field.
Proof Adv Type
The Proof Advisory Type allows you to set
the kind of advisory generated when a compres­sor proof has failed. Choose Alarm if you want to generate an alarm, or Notice if you want to generate a notice.
Door Sw Alm Tm
After the door has been opened, the CUB
records how long the door remains open. If it remains open longer than the Door Switch Alarm Time, the CUB will generate a door open alarm. Enter the desired alarm setpoint in hours:minutes (H:MM) format.
7.3.10.7. Wash Active Alarms
7.3.10.5. Phase Fail Shutdown
If a phase loss detection device is available, the CUB can shut down all systems when a phase loss is detected.
Phase Fail Act
The Phase Fail Active State tells the CUB what digital state from the phase loss checking device signifies a phase failure. Set this field to CLOSED if the phase loss device closes its con­tacts on a phase failure, or OPEN if it opens contacts.
Phase Adv Type
When a phase loss occurs, the CUB will gen­erate either an alarm or a notice, depending on the value of this field.
7.3.10.6. Door Switch Alarms
If a door switch is available, the CUB can be programmed to generate alarms to indicate an open freezer door.
Door Sw State
The Door Switch Active State specifies whether an open door causes the door switch to be OPEN or CLOSED. Choose the door switch state that corresponds to “door open” in this field.
Door Sw Time
After the door has been opened, the CUB records how long the door remains open. If it remains open longer than the Door Switch Time, the CUB will assume the door is stuck open and will restart refrigeration to prevent food loss. Enter the desired fail-safe time in hours:minutes (H:MM) format.
If a clean switch is present on the condensing unit’s case circuit, you can program the CUB to generate an alarm if the system has been in W ash mode for too long.
Wash Sw State
The Wash Switch Active State specifies whether an OPEN or a CLOSED contact on the clean switch indicates “enter wash mode.” Choose either OPEN or CLOSED in this field.
Wash Sw Time
The Wash Switch Fail-Safe Time allows you to suspend Wash mode and resume refrigeration if W ash mode lasts longer than a fixed amount of time. Enter the desired Wash Fail-Safe time in hours:minutes (H:MM) format, or 0:00 if you do not wish to use this feature.
7.3.10.8. Case Temperature Alarms
The CUB will generate alarms when the case temperature is too high or too low.
Case Temp High
The Case Temp High Setpoint is the temper­ature at which a high case temperature alarm will be generated.
Case Tmp Dly
The Case Temp High Setpoint Delay is the amount of time the case temperature must be above the high case temp setpoint before an alarm will be generated.
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Case Defr Dly
Because the case temperature can be consid­erably higher in a case that is exiting defrost, the Delay After Defrost allows you to prevent high case temp alarms from occurring for a fixed amount of time after the end of a defrost cycle. Enter the desired delay in hours:minutes (H:MM) format.
Case Temp Low
The Case Temp Low Setpoint is the tempera­ture at which a low case temperature alarm will be generated.
Case Temp Low
The Case Temp Low Delay is the amount of time the case temperature must be below the low case temp setpoint before an alarm will be gen­erated.
7.3.10.9. Suction Temperature Alarms
The CUB is capable of calculating suction temperature based on the suction pressure and refrigerant type. You may program the CUB to generate an alarm for high and low suction tem­perature values.
Suct Temp High
The Suction Temp High Setpoint is the suc­tion temperature that, when exceeded, will cause a high suction temperature alarm to be gener­ated.
7.3.10.10. TD Condenser Control Alarms
Drop Leg High
The Drop Leg High alarm setpoint is the drop leg temperature that, if exceeded, will cause an alarm to be generated. If you wish to generate an alarm for high drop leg temperature, enter the desired setpoint in this field. Other­wise, to disable this alarm, leave the value set to NONE.
Drop Leg Dly
If you are using the high drop leg tempera­ture alarming feature, enter the amount of time the drop leg temperature must be higher than the setpoint before an alarm will be generated (HHH:MM).
TD High
The TD alarm setpoint is the value of the TD calculation that, if exceeded, will cause an alarm to be generated. If you wish to generate an alarm for high TD, enter the desired setpoint in this field. Otherwise, to disable this alarm, leave the value set to NONE.
TD Dly
If you are using the TD alarming feature, enter the amount of time the TD must be higher than the setpoint before an alarm will be gener­ated (HHH:MM).
Suct Tmp Dly
The Suction T emp High Delay is the amount of time the suction temperature must be above the Suction Temp High Setpoint before an alarm will be generated. The Suction T emp Low Delay is the amount of time the suction temperature must be below the Suction Temp Low Setpoint before an alarm will be generated. Enter the desired delay in hours:minutes (H:MM) format.
Suct Temp Low
The Suction Temp Low Setpoint is the suc­tion temperature that, when fallen below, will cause a low suction temperature alarm to be gen­erated.
Programming The CUB Using the E2 or Einstein Front Panel The MultiFlex CUB E2/ Einstein Interface • 43
Page 54
8 The MultiFlex CUB
Pressure(hold=.) Suction 16. Net Oil 111 Discharge 141
CaseTemps
1)36.6 2)36.5
3)36.6 4)35.9
5)36.5 6)36.6
Temps OAT: 32 Motor Room: 32 Suc:21 SST: 120 Disch Temp: NDF
Hand-Held Interface
8.1. CUB Hand-Held Terminal Status Screens
The MultiFlex CUB Hand-Held Terminal (HHT) interface allows you to view status of condensing unit systems and configure setpoints directly on the board. If you are using CUBs sep­arate from a central E2 or Einstein system, the Hand-Held Terminal will be the only program­ming interface you may use.
IMPORTANT! If the CUB boards are con­nected to a parent E2 or Einstein, do not use the
Hand-Held Terminal to make permanent con­figuration changes. Changes made to an E2- or
Einstein-connected CUB via the Hand-Held Ter­minal are designed to be temporary. The parent controller does not recognize any configuration changes made by the HHT , and when the HHT is unplugged from the CUB, E2 or Einstein will change all parameters changed with the HHT back to their original values.
When you first plug in a Hand-Held Termi­nal into the MultiFlex CUB’s HHT jack, the dis­play will show the first of six status screens. The display will automatically scroll through each of the six screens in order at the rate of three sec­onds per screen. To toggle automatic scrolling OFF and ON, press the Point “.” key on the Hand-Held Terminal.
You may also scroll through the status screens manually using the UP ARROW and DOWN ARROW keys.
8.1.1. Pressure Status
The Pressure Status screen shows the values of the suction pressure, oil pressure, and dis­charge pressure transducers.
HHT Keys Function
F1 Main Menu screen F2 Automatic scrolling status screen LEFT ARROW
and RIGHT AR­ROW
UP ARROW and DOWN AR­ROW
Cancel Deletes number entered Enter Saves changes (optional - use the
-
.
Table 8-1 - HHT Key Functions
Left and right arrow keys point to the desired editable field
Up and down arrow keys scroll through screens
down arrow) The Dash key toggles through the
options of the list field The Point key toggles through the
options of the list field
8.1.2. Case Temp Status
The Case Temp Status screen shows the cur­rent values of all six case temperature inputs.
8.1.3. Other Temperatures
This screen shows the value of the Outdoor Air Temperature and motor room temperature (both of which are read from E2 or Einstein’s Global Data application), the Suction Tempera­ture (Suc), the Suction Saturation Temperature (SST), and the Discharge Temperature (Disch Temp).
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8.1.4. Input Summary Screen
Inputs TermTemp: NDF TermDig: OFF SC1 117 SC2 -12
Outputs Comp ON Def OFF RSol ON EvpfnON
Outputs Cond1 ON #2 ON Alarm OFF SC1 OFF SC2 OFF
Time: 12:00:00 Safety [Modes] : OK Circuit: Refr
ControlBy: Temp CI/CO SP/DB 55 /45 55 /5 P:32.5 T: 33.5
1-Gen 2-Setpts 3-Alm 4-Defrst 5-Input 6-More Select: 1
7-Output 8- AuxIn 9-Sensor Control Select: 7
8.1.8. Refrigeration Control Status
The Input Summary screen shows the status of the termination temperature sensor and the defrost digital termination input.
The Input Summary screen also shows the values of the sensor control inputs (SC1 and SC2) in the engineering unit value specified for the sensor control application.
8.1.5. Outputs Summary Screen #1
The Output Summary screen shows the sta­tus of the compressor (Comp), defrost output (Def), refrigeration solenoid (RSol), and evapo­rator fan (Evpfn). Values shown in these fields will be either ON or OFF.
8.1.6. Outputs Summary Screen #2
This screen shows the setpoints and control values for refrigeration control using both the Pressure and the Temperature control strategies.
If you are controlling by Pressure (Con- trolBy: Press), the values under CI/CO are the Cut In/Cut Out suction pressure setpoints, and the value in the P: field is the suction pressure.
If you are controlling by Temperature (Con- trolBy: Temp), the values under SP/DB are the setpoint and deadband values for the case tem­perature, and the value in the T: field is the com­bined case temperature for the circuit.
8.2. Altering CUB Configura-
tion Using The Hand-Held Terminal
8.2.1. The Main Configuration Menu
To begin editing the MultiFlex CUB’s con­figuration, press F1 on the Hand-Held Terminal. This brings up the Main Configuration Menu.
The Output Summary screen #2 shows the
status of the condenser fans (Cond1 and #2), alarm output (Alarm), and the two sensor con­trol outputs (SC1 and SC2). Values shown in these fields will be either ON or OFF.
8.1.7. System Status
This screen shows the current time, the cur­rently active Safety mode, and the status of the refrigeration circuit.
Altering CUB Configuration Using The Hand-Held Terminal The MultiFlex CUB Hand-Held Interface • 45
NOTE: Pressing F1 at any time will bring up this menu screen.
Page 56
The Main Menu is actually a series of two
Circuit Name :UNDEFINED
CtrlStrat : Press
menus. Because of the limitation of the size of the screen, menu options #7, 8, and 9 are only available after pressing 6-MORE.
use the number keys to enter a value, or if the field requires a selection from a list of options, use the Point key “.” and Dash key “-” to cycle through the options.
All of the screens that contain editable fields
are categorized into one of the following menu options:
• 1 - General - These screens set general properties
for the condensing unit system, such as case circuit type and refrigerant type.
• 2 - Setpts - These screens are where compressor,
case circuit, and condenser control setpoints are specified.
• 3 - Alm - Alarm setpoints and delays for all systems
are configured in these screens.
• 4 - Defrost - Fields in these screens are used to set
defrost type, duration, termination setpoints, and other vital defrost control settings.
• 5 - Input - These screens are used to configure the
input names, types, and offsets for the MultiFlex CUB inputs.
• 7 - Output (press 6-MORE to access) - These
screens are used to configure the output names for the MultiFlex CUB outputs.
• 8 - Aux In (press 6-MORE to access) - Special aux-
iliary input types are configured in these screens.
• 9 - Sensor Control (press 6-MORE to access) - All
settings and setpoints necessary to set up sensor con­trol applications in the CUB are configured in these screens.
To enter alphanumeric information (such as names), use the Point key “.” and the Dash key “-” to scroll through the characters for each space, and the RIGHT ARROW key to move to the next character.
T o record your changes, simply press the UP ARROW or DOWN ARROW key to move the cursor to another field.
To exit Configuration mode, use the UP ARROW or DOWN ARROW keys to move the cursor off the screen. When it is no longer visi­ble, you are no longer in Configuration mode and may navigate normally.
8.2.3. General Hand-Held Terminal
Screens
The screens shown in this section are acces­sible by selecting 1-Gen from the Main Menu.
8.2.3.1. Circuit Name
8.2.2. Navigation
The screens underneath each menu item are a simple series of screens. The UP ARROW and DOWN ARROW keys are used to scroll through the screens.
Configuration Mode
On any menu or configuration screen, to make a selection or enter a value you must press the RIGHT ARROW key to begin Configuration mode.
In Configuration mode, you will see a cursor shaped like an arrow pointing right. Use the UP ARROW and DOWN ARROW keys to move the cursor to the field you want to change. Then,
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Circuit Name
If desired, enter a unique name for the circuit in this field. Use the Point key “.” and Dash key “-” to scroll through alphanumeric characters for each space, and the RIGHT ARROW and LEFT ARROW keys to move the cursor to the next or previous character.
Control Strategy
The Control Strategy determines whether the compressor will be controlled by suction pres­sure or suction temperature. Select either Pres- sure or Temperature.
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8.2.3.2. Refrigerant Select
Refrigernt:R401B Case Type : 00 Oil Protect: NO Comp Prf: YES
PhaseEnable: NO Door Switch: YES Wash Switch: NO Pumpdwn: Disable
EngUnit: English TempUnits: Deg C Zone: 1
8.2.3.3. Phase
Refrigerant Type
The Refrigerant field is where the type of
refrigerant being used in the condensing unit system must be specified. The E2 or Einstein uses the Refrigerant field to automatically cal­culate saturation suction temperature.
Case Type
The E2 or Einstein uses the Case Type field
to assign default setpoints for your circuit based on the case type. There are 64 case types to choose from, each with its own default tempera­ture setpoint, defrost type, and defrost times. A complete list of case types is provided in Appen- dix B: Case Type Defaults on page 68.
Entering the case type number with the HHT is for reference purposes only. Setting the case type number will not set defaults for case set­point or defrost. E2 or Einstein will override any settings made with the HHT.
Oil Protection
The Oil Protect field specifies whether an oil failure sensing device is present for the con­densing unit. If an oil pressure transducer or dig­ital input is available, set this field to YES. If oil pressure checking will not be used for this CUB, set this field to NO.
Phase Enable
The PhaseEnable field specifies whether a
phase loss detection device is present for the condensing unit. If a phase loss input is present, set this field to YES. If not, set this field to NO.
Door Switch
The Door Switch field specifies whether a
door switch is present on the condensing unit’s case circuit. If a door switch input is available, set this field to YES.
Wash Switch
The Wash Switch field specifies whether
this condensing unit has a clean switch to toggle the case circuit in and out of Wash mode. If a clean switch input is available, set this field to YES.
Pump Down
The Pumpdwn field enables or disables the
Pump Down Delay that occurs in between refrigeration and defrost. If set to YES, the CUB will leave the defrost output OFF and leave the compressor ON until the suction pressure is below the Minimum Suction Pressure setpoint. If set to YES, there will be no delay between the end of refrigeration and the activation of the defrost output.
Compressor Proof
The Comp Prf field specifies whether a compressor proof checking device is present for the condensing unit. If a compressor proof input is available, set this field to YES. If compressor proof checking will not be used for this CUB, set this field to NO.
Altering CUB Configuration Using The Hand-Held Terminal The MultiFlex CUB Hand-Held Interface • 47
8.2.3.4. Temp EU
Engineering Units
The EngUnit field determines whether engi-
neering units for pressure values will be dis­played using English units (PSI, or pounds per square inch) or metric units (KPA, or kilopas­cals).
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Temperature Units
NetwrkAlarm: NO NetworkTime: YES Time: 15:00:04 Date: 01/04/02
Daylight Savings APR NO DLT SUN DLT Savings End OCT NO DLT SUN
The TempUnits field determines whether
engineering units for temperature will be dis­played in degrees Fahrenheit or degrees Celsius.
Zone
The Zone field allows you to assign this
CUB to a zone along with other CUBs in the same motor room for purposes of controlling motor room temperature.
8.2.3.5. Time and Date
Network Alarm
This field specifies whether you want the
CUB to set its alarm output if it goes offline.
Network Time
This field specifies whether you want the
CUB to keep its own time clock synchronized with its parent E2 or Einstein’s clock. Set this field to ENABLE if you want CUB to synchro­nize its time with E2 or Einstein, or DISABLE if you don’t want time synchronization.
Time
The Time field sets the time clock for the
MultiFlex CUB. Enter the current time in 24­hour format (HH:MM:SS).
Date
The Date field sets the da te for the MultiFlex
CUB. Enter the current date in MM/DD/YY for­mat.
8.2.3.6. Daylight Savings Time
Daylight Savings
The three fields under the Daylight Savings
heading determine which day of the year the MultiFlex CUB’s internal clock will adjust the time to observe daylight savings time. The three fields, in order are:
• MONTH - The month in which daylight savings
time begins. This should be set to APR (April) if fol­lowing standard U.S. DST guidelines.
• WEEK
• DAY
Daylight Savings End
- The week in which daylight savings time begins. This should be set to “1st Week” if follow­ing standard U.S. DST guidelines, or “NO DLT” if you do not wish to follow daylight savings time.
- The day of the week in which daylight sav­ings time begins. This should be set to SUN (Sun­day) if following standard U.S. DST guidelines.
Like the Daylight Savings fields described
above, the three fields under DLT Savings End determine the month, week, and day that day­light savings time ends for the MultiFlex CUB’s internal clock.
If you wish to follow U.S. DST guidelines,
set these three fields to OCT, 5th Week, and SUN respectively . To disable DST , set the Week field to NO DLT.
8.2.4. Setpoints Screens
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NOTE: The following screens are only for CUB TD and CUB-II with TD Strategy. CUB TD consists of the next three screens (Con­denser SPs, TD Strat Info, and TD Max).
For CUB temperature differential (TD), the Strategy is fixed as TD. The CUB Strategy can be set as TD or Traditional. For more informa­tion on TD Strategy, see Section 6.2.1., Temper- ature Differential (TD) Strategy.
Page 59
See Section 8.2.4.4., Comb Method for the
Condenser SPs Strategy: TD Num Fans: 4
TD Strat Info Dleg Min: 70 Dleg Max: 100 Dleg Off: 0
TD Max: 15 TD DBand: 1 FanOnDly: 30S FanOffDly: 30S
CombMeth: Avg Temp SetPt: -12 Temp DdBnd: 5 Mix %: 50%
start of the HHT screen list for CUB.
8.2.4.1. Condenser Setpoints
Condenser Setpoints
The two fields on this screen show the strat­egy being used and the number of condenser fans being controlled.
Strategy
The control strategy is fixed to TD for CUB­TD. For CUB using Traditional (Pressure) strat­egy, refer to Section 8.2.4.6., Condenser SPs.
Number of Fans
Set the number of condenser fans to be con­trolled by the TD Strategy (four maximum).
8.2.4.2. TD Strat Info
8.2.4.3. TD Max
TD Maximum
The TD setpoint that is maintained by
cycling fans ON and OFF.
TD Deadband
The deadband forms a range of TD values equally above and below the setpoint within which the control TD value is considered to be within limits.
Fan On Delay
This setpoint defines the amount of time (in seconds) that must elapse between activation of fan stages.
Fan Off Delay
This setpoint defines the amount of time (in seconds) that must elapse between deactivation of fan stages.
TD Strategy Information
The three fields under the TD Strat Info heading show the minimum and maximum set­points of the drop leg temperature.
Drop Leg Minimum
If the drop leg temperature falls below this setpoint, the fans will stage OFF using FanOffDly.
Drop Leg Maximum
If the drop leg temperature rises above this setpoint, the fans will stage ON using FanOnDly .
Drop Leg Offset
A way of adding or subtracting an offset to the drop leg temperature sensor reading, if needed to tune the individual condensing unit.
NOTE: The following screens are only for CUB-II.
8.2.4.4. Comb Method
Combination Method
The CombMeth field is significant only if
you are using the Temperature compressor con­trol strategy.
The Combination Method determines how multiple case temperature sensors in the case cir­cuit will be combined into a single control tem­perature value for use in comparing to the temperature setpoint. There are five strategies to choose from:
• AVG - The average value of all case temperature in-
Altering CUB Configuration Using The Hand-Held Terminal The MultiFlex CUB Hand-Held Interface • 49
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puts.
MinOnTime : 1 M MinOffTime: 1 M Max Pmpdwn: 60 S RsolCmpDly: 60 S
Suction Setpoint CutInPress : 55 CutOutPress: 45 MinimumPres: 1
• MIN - The lowest sensor value of all the case tem-
perature inputs.
• MAX - The highest sensor value of all the case tem-
perature inputs.
• MIX - A mixture of two inputs, the ratio of which is determined by the Mix % field (see Mix Percentage below).
• FIRST - The lowest-numbered input that is not shorted, open, or otherwise invalid, will be used as the case temperature input.
Temperature Setpoint
This field is significant only when using the
Temperature compressor control strategy.
The temperature setpoint is the circuit tem­perature to which the CUB will attempt to con­trol the cases. Along with the Temperature deadband, the CUB uses this setpoint to deter­mine when to activate the compressor and when to deactivate it. Refer to Section 6.1.2., Case Temperature Compressor Control, for more on how the temperature setpoint works.
Temperature Deadband
This field is significant only when using the Temperature compressor control strategy.
The temperature deadband is a range of tem­peratures equally above and below the setpoint within which the case circuit temperature is con­sidered to be acceptable. While within this range, the compressor will remain in its current state until the temperature input value triggers a change by moving above or below the deadband range. Refer to Section 6.1.2., Case T emperatur e Compressor Control, for more on how the tem­perature setpoint works.
8.2.4.5. Min OFF/ON Times
Minimum ON Time
The Minimum ON Time is the amount of time the compressor must remain ON after acti­vation before being allowed to turn OFF. Enter the desired minimum ON time in minutes.
Minimum OFF Time
The Minimum OFF Time is the amount of time the compressor must remain OFF after deactivation before being allowed to turn ON. Enter the desired minimum OFF time in min­utes.
Max Pump Down Time
A Pump Down is achieved by turning the refrigeration solenoid OFF while the compressor remains ON. The Max Pump Down Time is the maximum amount of time a Pump Down will last if it is not terminated prematurely by the suction pressure falling below the Minimum Suction Pressure setpoint.
Refrigeration Solenoid/Compressor ON Delay
This field appears only if using the Tempera­ture compressor control strategy.
The Refrigeration Solenoid/Compressor ON Delay affects how long the CUB will wait after opening the refrigeration solenoid at the start of refrigeration before activating the compressor. Enter the desired delay in seconds.
Mix Percentage
The Mix % field is significant only if you
have selected Mix in the Combination Method field. This field determines what mix ratio will be used to combine temperature input #1 with input #2. The Mix strategy adds x% of #1 to (100-x)% of #2 to yield the combined tempera­ture, where x is the value entered in this field.
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NOTE: If you are using the Temperature compressor control strategy, the suction set-
points shown in this screen will be used as fallback Temperature Cont rol Input fails.
suction setpoints, enabled only when the case
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Cut In Press and Cut Out Press
Condenser SPs Strategy: Trad Num Fans: 2
Cond Fan #1 CutIn Press: 160 CutOut Pres: 140 MinOnTime: 1 M
Cond Fan #2 CutIn Press: 170 CutOut Pres: 150 MinOnTime: 1 M
The Cut In setpoint determines the suction pressure that, when exceeded, will cause the compressor to turn ON. In this strategy, the com­pressor will remain ON until the pressure falls below the Cut Out setpoint, at which point the compressor will turn OFF.
Minimum Suction Pressure
The Minimum Suction Pressure setpoint serves two purposes. When the condensing unit is operating in Refrigeration mode using the Temperature strategy, the Minimum Suction Pressure is the suction pressure at which the compressor will be shut off regardless of the case circuit temperature. This setpoint is neces­sary as a safety feature since the CUB is control­ling by temperature instead of by suction pressure.
If you enabled the Pump Down feature for this CUB, the Minimum Suction Pressure also acts as the termination setpoint for the pump down delay. The Pump Down period will end when the suction pressure falls below this set­point.
NOTE: The following screens are only for CUB-II with Trad (Traditional) Strategy (Condenser SPs, Condenser Fan 1 Setpoints,
and Condenser Fan 2 Setpoints).
Strategy
Set the type of condenser strategy that will
be used to cycle fans ON and OFF.
Number of Fans
Set the number of fans to be turned ON and OFF by the chosen strategy type. The maximum number of fans that can be controlled is two.
8.2.4.7. Condenser Fan 1 Setpoints
The fields underneath the Condenser Fan #1 heading are where the Cut In/Cut Out setpoints for condenser fan #1 are programmed.
Cut In Pressure
When the discharge pressure rises above the Cut In setpoint, the fan will turn ON.
Cut Out Pressure
When the discharge pressure falls below the Cut Out setpoint, the fan will turn OFF.
Min ON Time
The minimum ON time is the smallest amount of time the condenser fan must remain ON after being activated.
If using two condenser fans, program fan #1 with a lower Cut In setpoint than fan #2, so that the fans will come on in stages.
8.2.4.6. Condenser SPs
Condenser Setpoints
The two fields on this screen show the strat­egy being used and the number of fans being controlled. The two following screens are for the strategy set to Traditional control. Traditional control uses Cut In/Cut Out setpoints for con­trol-based on discharge pressure. For TD setup, see Section 8.2.4.1., Condenser Setpoints.
Altering CUB Configuration Using The Hand-Held Terminal The MultiFlex CUB Hand-Held Interface • 51
8.2.4.8. Condenser Fan 2 Setpoints
The fields underneath the Condenser Fan #2 heading are where the Cut In/Cut Out setpoints for condenser fan #2 are programmed.
Cut In Pressure
When the discharge pressure rises above the Cut In setpoint, the fan will turn ON.
Cut Out Pressure
When the discharge pressure falls below the Cut Out setpoint, the fan will turn OFF.
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Min ON Time
Case HiTemp: 35 Case LoTemp: 15 AlarmDelay: 60 M After Defr: 30 M
PhaseFail Alarm Phase Act: CLSD Proof Act: CLSD ProofDelay: 30 S
Comp ShutDownOn ProofFail: YES AutoResets: 1 ResetDelay: 4 M
The minimum ON time is the smallest amount of time the condenser fan must remain ON after being activated.
If using two condenser fans, program fan #1 with a lower Cut In setpoint than fan #2, so that the fans will come on in stages.
8.2.5. Alarm Setpoints Screens
8.2.5.1. Case Hi and Lo Temp
Case Temp High Setpoint
The Case Temp High Setpoint is the temper­ature at which a high case temperature alarm will be generated.
Case Temp Low Setpoint
The Case Temp Low Setpoint is the tempera­ture at which a low case temperature alarm will be generated.
Phase Fail Active State
The Phase Fail Active State tells the CUB what digital state from the phase loss checking device signifies a phase failure. Set this field to CLSD if the phase loss device closes its contacts on a phase failure, or OPEN if it opens contacts.
Proof Active State
The Proof Act field tells the CUB what digi­tal state from the proof checking device means FAIL. If set to CLSD, the CUB will interpret a contact closure as FAIL. If set to OPEN, the CUB will interpret an open contact as FAIL.
Compressor Proof Delay
The Compressor Proof Delay is the amount of time a proof checking device must read FAIL before the CUB will consider the compressor to have failed. Enter the desired delay in seconds.
8.2.5.3. Shut Down On Proof
Alarm Delay
The Alarm Delay is the amount of time the case temperature must be above the high case temp setpoint or below the low case temp set­point before an alarm will be generated. Enter the delay in number of minutes.
After Defrost
Because the case temperature can be consid­erably higher in a case that is exiting defrost, the Delay After Defrost allows you to prevent high case temp alarms from occurring for a fixed amount of time after the end of a defrost cycle. Enter the desired delay in minutes.
8.2.5.2. Phase Fail
Phase Alarm/Notice
When a phase loss occurs, the CUB will gen­erate either an alarm or a notice, depending on the value of this field.
Shut Down On Proof Fail
When the compressor fails, you have the option of either having the CUB control the compressor output as normal OR having the CUB lock the compressor OFF until the failure is reset. Set this field to YES if you want to lock the compressor OFF during failure. Set this field to NO if you want the CUB to continue attempt­ing to control the compressor as normal.
Auto Resets
The AutoResets field determines how many times the CUB will attempt to automatically reset the compressor failure. After the retries have occurred, if the compressor is still failed, the CUB will consider the compressor failed until the compressor is reset manually.
Enter the desired number of resets per hour in this field.
Proof Reset Delay
The Proof Reset Delay is the amount of time the CUB will wait between retry attempts. Enter the number of minutes in this field.
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8.2.5.4. Proof Failure
ProofFail Alarm OilFailStpt: 9 OilFailDly: 120S AutoRestarts: 0
OilRestDly: 0 M OilFailRun: NO OilFailType : None
DigitalOilFail Fail State: CLSD AutoRestarts: 0
Proof Fail
The ProofFail field determines whether the
E2 or Einstein will generate an alarm or notice when a compressor proof failure occurs. Choose either Alarm or Notice in this field.
Oil Failure Setpoint
If you chose Pressure as the Oil Failure
T ype, the Oil Failure Setpoint is the pressure that indicates a low oil condition in the compressor. When the oil pressure falls below this setpoint, a compressor oil failure alarm will be generated.
Oil Failure Delay
The Oil Failure Delay is the amount of time an analog oil pressure transducer must be below the setpoint, or a digital pressure switch must be in the fail state before the CUB will shut off the compressor.
Auto Restarts
If you chose Pressure as the Oil Failure Type, the Auto Resets field sets the number of times the CUB will attempt to reset the oil fail­ure by turning the compressor OFF and then ON. If the oil sensor still registers a failure after all retries have occurred, the CUB will consider the compressor failed and will not attempt another reset.
Enter a number of retries per hour from 0-2.
8.2.5.5. Oil Restart Delay
Oil Failure Run
This field determines whether the CUB will continue to attempt to control the compressor as normal even after an oil failure has occurred. If this field is set to Yes, the CUB will turn the compressor output ON and OFF as normal dur­ing an oil failure. If set to No, the CUB will turn the compressor OFF and will not reactivate it until the oil failure has been reset.
Oil Failure Type
Choose the type of input device used to check oil pressure on the condensing unit. Choose Pressure if using an analog pressure transducer, Digital if using a digital pressure switch, or None if you do not wish to generate oil failure alarms.
8.2.5.6. Digital Oil Failure
Digital Oil Fail State
If you chose Digital as the Oil Failure Type, the Oil Fail State is the state of the digital pres­sure switch that indicates a low oil condition. When the digital input transitions to this state, a compressor oil failure alarm will be generated.
Dig. Auto Restarts
If you chose Digital as the Oil Failure Type, the AutoRestarts field sets the number of times the CUB will attempt to reset the oil failure by turning the compressor OFF and then ON. If the oil switch still registers a failure after all retries have occurred, the CUB will consider the com­pressor failed and will not attempt another restart.
Oil Reset Delay
The Restart Delay is the amount of time the CUB will wait between retry attempts. Enter the desired restart delay in minutes:seconds (M:SS) format.
Altering CUB Configuration Using The Hand-Held Terminal The MultiFlex CUB Hand-Held Interface • 53
Enter a number of retries per hour from 0-2.
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8.2.5.7. High Discharge Alarm
HiDischAlrm: 325 Disch Trip: 350 Reset Diff: 100 Reset Delay: 0 M
Auto Resets: 0
Comp Bypass Max Time: 60 M
DoorSwitch Open State: CLSD Fail Time: 45 M AlarmTime: 60 M
Wash Switch WashActive: CLSD Fail Time: 120 M
High Discharge Pressure Alarm
Enter the discharge pressure level that, when
exceeded, will cause a discharge pressure alarm to occur.
Discharge Trip
Enter the discharge pressure level that, when
exceeded, will cause a system shutdown. The Discharge Trip setpoint should be higher than the Discharge Pressure Alarm setpoint.
Reset Diff
A condensing unit that has been shut down
due to discharge trip can be automatically reset. When the discharge pressure falls below the dis­charge trip setpoint minus the reset differential (Disch Trip - Reset Diff) the CUB will a ttempt to reset the discharge trip failure if the reset delay timer has expired.
Reset Delay
The Reset Delay is the amount of time the
CUB will wait after a Discharge Trip before it will attempt a reset (if the Reset Differential has been met). Enter the desired Delay in minutes (M) format.
8.2.5.8. High Discharge Auto Resets
Comp Bypass Max Time
The Compressor Bypass Max Time sets the maximum amount of time a refrigeration ON bypass will last when initiated from the E2 or Einstein. If refrigeration is bypassed ON past this time, the bypass will end and the CUB will resume regular control.
8.2.5.9. Door Switch
Door Switch Open State
The Door Switch Open State specifies whether an open door causes the door switch to be OPEN or CLOSED. Choose the door switch state that corresponds to “door open” in this field.
Door Switch Fail-Safe
After the door has been opened, the E2 or Einstein records how long the door remains open. If it remains open longer than the Door Switch Fail-Safe Time, the E2 or Einstein will assume the door is stuck open and will restart refrigeration to prevent food loss. Enter the desired fail-safe time in minutes.
Door Switch Alarm Time
After the door has been opened, the CUB records how long the door remains open. If it remains open longer than the Alarm Time, the CUB will generate an alarm. Enter the desired alarm time in minutes.
Auto Resets
The Auto Resets field sets the number of
attempts the CUB will make to automatically reset the system within an hour after a discharge trip shutdown has occurred. After all attempts have been made and the discharge trip is still occurring, the CUB will lock the compressor OFF until the system is manually reset.
Enter a number of retries per hour from 0-2.
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8.2.5.10. Wash Switch
Wash Switch Active State
The Wash Switch Active State specifies whether an OPEN or a CLOSED contact on the clean switch indicates “enter wash mode.” Choose either OPEN or CLSD in this field.
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Wash Fail-Safe Time
Defrst: Electric PumpDwn: Enable Term Type : Term Temp
EvapFanDefr: OFF EvapFanIdle: ON EvapFan On Delay AfterDefr: 15 S
The Wash Fail-Safe time allows you to sus­pend Wash mode and resume refrigeration if Wash mode lasts longer than a fixed amount of time. Enter the desired Wash Fail-Safe time in minutes (MM) format.
8.2.6. Defrost Setup Screens
The series of screens under the “Defrost” heading are where the parameters that control defrost must be specified.
pires (this is the same as no termination).
• Min Case Temp - Instead of using a dedicated
“Term Temp” sensor, the CUB will use the lowest value among all case temperature sensors as the de­frost termination temperature value.
• Suction Pressure - The suction pressure transduce r.
Defrost will terminate when suction pressure rises above the termination pressure setpoint.
• Case Temp 1-6 - Instead of using a dedicated “Term
Temp” sensor, the CUB will use one of the six case temperature sensors as the termination sensor during defrost.
8.2.6.1. Defrost Type
Defrost Type
Choose the manner in which the case circuit will be defrosted in the Defrst field. There are two options:
• Off Cycle - Refrigeration will be disabled, and no
heat will be directly applied to the evaporator.
• Electric - Refrigeration will be disabled, and electric
heat will be applied to the evaporator.
Pump Down
This field is shown only when Electric defrost is selected as the Defrost Type. Enabling Pump Down causes the CUB to delay transition from Refrigeration to Defrost to allow refriger­ant to be pumped out of the evaporator. Pump Down uses the refrigeration solenoid.
To enable the Pump Down delay, set this field to ENABLE. To disable the Pump Down Delay, set this field to DISABLE.
Termination Type
The Termination Type determines which sensor’s value will be used to determine when a defrost cycle must be terminated. There are six options:
8.2.6.2. Fan Control
Evap Fans During Defrost
This field determines the state of the case
circuit evaporator fans when defrost is active for the circuit. Set this field to ON to turn the case fans ON during defrost, or OFF to turn the case fans OFF.
Evap Fans During Idle
This field determines the state of the case circuit evaporator fans when the case tempera­ture setpoint is satisfied and refrigeration is not active in the case. Set this field to ON to leave the case fans ON during idle, or OFF to turn the case fans OFF.
Evap Fan ON Delay After Defrost
This parameter delays the amount of time the CUB will wait after a defrost has ended before turning on the evaporator fans. This delay is designed to keep the fans from blowing moisture off the coil and onto the case doors or walls. Enter the desired delay in seconds.
• Digital - Digital temperature sensor (Klixon).
• Term Temp - Analog temperature sensor. Defrost
will terminate when the temperature is above the ter­mination temp setpoint.
• Time - Defrost will terminate when defrost time ex-
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8.2.6.3. Defrost Times
Duration: 45 M MinDefDur: 2 M Drip Time: 2 M NumSchedules: 4
Defrost Schedule 1 0:00 2 6:00 3 12:00 4 18:00 5 NOVAL 6 NOVAL
Defrost Schedule 7 NOVAL 8 NOVAL 9 NOVAL 10 NOVAL 11NOVAL 12 NOVAL
Input Setup 1 Name: CaseTemp1 Type: TEMP Offset: 0
Defrost Duration
The Defrost Duration is the maximum amount of time a defrost cycle will last. Unless it is prematurely terminated by temperature or suc­tion pressure, a defrost cycle will end when it has been in defrost for an amount of time equal to this field (not including any Pump Down or drip delays).
Enter the desired Defrost Duration in min­utes.
Minimum Defrost Duration
The Minimum Defrost Duration sets the minimum amount of time a defrost cycle will last. A defrost cycle will always last at least as long as this time, and will ignore all calls for defrost to terminate until the Minimum Defrost Time has elapsed.
Enter the desired Defrost Duration in min­utes.
Drip Time
The Drip Time is a delay between the end of defrost and the resuming of refrigeration to allow excess moisture to drain from the evapora­tor coil.
8.2.6.4. Defrost Schedule Screens 1 and 2
The twelve numbered fields in these two screens are where the defrost start times for the CUB are entered.
If you chose a case type in the Case Type field, the defrost times corresponding to your case type will be entered for you. Otherwise, enter the defrost start times you wish to use for the CUB in the twelve numbered fields. Times must be entered in 24-hour format.
8.2.7. Input Setup Screens
The series of screens under the “Input” Main Menu option will choose the name, type, and offset for each of the 16 inputs on the CUB board. Use the DOWN ARROW keys to scroll through all configuration screens from 1 to 16.
8.2.7.1. Input Setup
During the drip time, both the refrigeration and defrost outputs will be OFF. When the drip time has elapsed, refrigeration will resume in the case circuit.
Enter the desired drip time, in minutes, in this field.
Number of Defrost Schedules and Defrost Time
The Number of Defrost Schedules sets the number of daily defrosts for this circuit. This field is automatically filled in for you when you select a case type in the Case Type field.
Enter a number from 1 through 6 in this field.
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Name
The Name field is where you must specify
the function of the input device attached to the point. Use the Point and Dash keys to scroll through the possible values for this field (see Table 8-2).
If this input will not be used for this CUB,
choose the NOT USED option in the Name field.
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Name Description
Suct Xdcr Suction pressure transducer Disch Xdcr Discharge pressure transducer Oil Xdcr Analog oil pressure transducer Case 1 Temp-Case 6
Temp DrLeg Temp Drop Leg temperature sensor Term Temp Analog termination temperature sen-
Term Dig Digital defrost termination sensor
Alarm Reset Alarm reset button or switch Door Switch Door switch Clean Switch Clean switch Disch Temp Discharge temperature SensCtrl 1-2 Input for Sensor Control modules #1
Comp Proof Compressor proof Phase Loss Phase loss checking device KW Analog KW transducer input Suct Temp Suction Temperature probe Oil Dig Digital oil pressure switch NOT USED Input value is unused
Table 8-2 - MultiFlex CUB Input Names
Case temperature sensors #1 through #6
sor (NOT digital — use Defrost Term Sensor for digital sensors)
(NOT analog — Use Term Temp for analog termination sensors)
through #2
NOTE: You may choose to have multiple in­puts assigned to the same Sensor Control
module. These inputs will be combined by the CUB-II’ s sensor control application using the strategy chosen in Sensor Control.
Note that when you choose a value for the
Name field, the CUB does not automatically enter an appropriate default value in the Type field. You must manually enter the type for all sensor inputs.
Table 8-3 lists the input types available for
sensor control inputs.
Input Type Description
Temperature Analog temperature sensor 12v-100PSI 12v transducer, 0-100PSI 12v-200PSI 12v transducer, 0-200PSI 12v-500PSI 12v transducer, 0-500PSI 5v-100PSI 5v transducer, 0-100PSI 5v-200PSI 5v transducer, 0-200PSI 5v-500PSI 5v transducer, 0-500PSI Humidity Relative Humidity Sensor Power-KW Kilowatt transducer, 1-5VDC analog
output signal Ref Leak Refrigerant Leak Detector Dewpoint Dewpoint Probe LM235-TEMP LM235 Temp Probe Ref Level Refrigerant Level Transducer Liq Level Liquid Level Transducer Light Level Light Level Sensor Pulse-Cnt Kilowatt transducer, pulse KW out-
put signal Dig-ON/OFF Digital ON/OFF signal Linear-V 0-5 V linear sensor
Table 8-3 - CUB Sensor Control Input Types
Type
The Type field tells the CUB what kind of
sensor is providing the input value. This value of this field must correspond to the type of input suggested by the Name field. For example, if the Name of an input is Suct Temp, CaseTemp1, or one of the other analog temperature sensor types, the Type field must be set to TEMP in order for the input signal from the sensor to be read like a temperature sensor .
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8.2.8. Outputs Screens
Out #1 Comp Out #2 Defrost Out #3 CondFan1 Out #4 Remote
Out #5 Remote Out #6 Remote Out #7 Remote Out #8 Alarm
Pulse KW Setup KWH per Pulse: 20
Analog KW Setup Volts KW Min: 0 0 Max: 5 5000
Linear 1 Setup Volts Output Min: 0 0 Max: 5 100
Linear 2 Setup Volts Output Min: 0 0 Max: 5 1000
The two screens under the heading “Output” are where you assign each of the eight relay out­puts to a controlled device in the condensing unit system.
8.2.9.2. Analog KW Setup
KW Analog
If you are using an analog KW transducer, you must enter the voltage range of the input and the range of KW values the voltage corresponds to. This information is different for each KW Transducer and depends on the line voltage and current transducer (CT) rating. Refer to your KW transducer’s installation instructions.
Sensor Control
Input Type
Comp The compressor CondFan1 Condenser fan #1 CondFan2 Condenser fan #2 CondFan3 Condenser fan #3 CondFan4 Condenser fan #4 Defrost The defrost output Refr Sol Refrigeration solenoid Evap Fan Case evaporator fan Alarm The alarm output (turns ON when
alarm condition exists on CUB)
SensCtrl1 Output controlled by sensor control
loop #1
SensCtrl2 Output controlled by sensor control
loop #2
Remote Unused by CUB, but may be con-
trolled by E2 or Einstein remotely
NDF Not defined
Table 8-4 - CUB Sensor Control Output Types
Description
8.2.9. Auxiliary Inputs Screens
8.2.9.1. Pulse KW Setup
Under the Volts column, enter the minimum and maximum sensor output voltages. Under the KW column, enter the minimum and maximum KW represented by the min/max voltage range.
8.2.9.3. Linear 1 and 2 Setup
Linear 1 and 2
If you wish to use one or both of the Linear 1 and Linear 2 sensor types used by the sensor control applications, you must specify the volt­age range of the sensor output and the range of values those voltages represent.
Under the Volts column, enter the minimum and maximum sensor output voltages. Under the Output column, enter the minimum and maxi­mum engineering unit values represented by the min/max voltage range.
KW Per Pulse
If you are using a pulse accumulation type KW transducer, you must enter the number of KW per pulse for this transducer in this field.
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8.2.10.Sensor Control Screens
SnsrCntrl 1 Name SC 1
Type: OAT
S1 CutIn: 10 S1 CutOut: 5 S1 MinOn: 1 M S1 MinOff: 1 M
The screens under the Sensors menu option are for setting up sensor control applications. Each of the two sensor control applications have four screens full of fields that must be config­ured. T o program Sensor Control application #2, you must scroll down through the first four Sen­sor Control #1 screens.
8.2.10.1. Sensor Screen 1 (Name, Type)
Sensor Name
By default, the name of the two sensor con­trol applications are SC 1 and SC 2 respectively . To choose a different name, enter it in this field.
Type
The Type in sensor control tells the CUB what special function, if any, the sensor control application is performing. This field is different from the Type field in the Input Setup screen (see Section 8.2.7.1., Input Setup), which speci­fies the type of sensor that is providing the input.
Input Type Description
Generic The sensor control application exists
simply to control an output and to generate hi/lo alarms.
OAT Choose this option if the input is
reading outdoor air temperature. This will allow the CUB to share the OAT value with E2 or Einstein for use in other applications.
MotorRM T Choose this option if the input is an
air temperature sensor in the CUB’s motor room. This passes the sensor value to E2 or Einstein’s Global Data for sharing with other CUBs in the same zone.
Linear 1 The sensor connected to this input
uses the linear properties for volts and engineering units specified in Screen 4, Auxiliary Inputs, for "Linear 1."
Linear 2 The sensor connected to this input
uses the linear properties for volts and engineering units specified in Screen 4, Auxiliary Inputs, for “Linear 2."
Ref. Leak The sensor is a refrigerant leak detec-
tor. Light Level The sensor is a light level sensor. Humidity Relative Humidity Sensor.
Table 8-5 - Sensor Control Types
Table 8-5 describes the choices that may be
selected for the Sensor Control T ype field, along with their meanings.
8.2.10.2. Sensor Screen 2 (Cut In/Out, Min ON/OFF)
S1 Cut In and S2 Cut In
The S1 Cut In and S2 Cut In setpoints are the
input values at which the sensor control outputs will transition from OFF to ON. Refer to Section
6.4.1., How Cut In/Cut Out Control Works, for
further explanation.
S1 Cut Out and S2 Cut Out
The S1 Cut Out and S2 Cut Out setpoints are the input values at which the sensor control out­puts will transition from ON to OFF. Refer to
Section 6.4.1., How Cut In/Cut Out Control Works, for further explanation.
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S1 MinOn and S2 MinOn
S1 HiAlarm: 20 S1 LoAlarm: 1 AlarmDelay: 0 M
AlmPriority: 1 CombMethd: First Eng Units: NDF
The S1 Minimum ON Time and S2 Mini­mum ON Time parameters set the amount of time a sensor control output must remain ON after activating before being allowed to turn OFF. Enter the desired time in minutes.
8.2.10.4. Sensor Control Screen 4 (Alarm Priority, Comb Method)
S1 MinOFF and S2 MinOFF
The S1 Minimum OFF Time and S2 Mini­mum OFF Time parameters set the amount of time a sensor control output must remain OFF after deactivating before being allowed to turn ON. Enter the desired time in minutes.
8.2.10.3. Sensor Screen 3 (Hi/Lo Alarm)
S1 Hi Alarm and S2 Hi Alarm
The S1 HiAlarm and S2 HiAlarm fields set the high alarm setpoint for the Sensor Control applications. Whenever a sensor control input rises above the Alarm Hi setpoint, an alarm will be generated.
S1 Lo Alarm and S2 Lo Alarm
The S1 LoAlarm and S2 LoAlarm fields set the low alarm setpoint for the Sensor Control application. Whenever the sensor control input falls below the low alarm setpoint, an alarm will be generated in the parent E2 or Einstein.
Alarm Delay
The Alarm Delay for Sensor Control 1 and 2 (S1 and S2) set the amount of time the sensor control input must remain above the high alarm setpoint or below the low alarm setpoint before an alarm will be generated. Enter the desired alarm delay in minutes.
Alarm Priority
The Alarm Priority field determines the pri­ority level of the high and low level alarms gen­erated by this sensor control application. The priority level is used by the parent E2 or Einstein to determine how the alarm will be reported and handled.
Comb Method
The Comb Method only applies if you assigned more than one input to this Sensor Con­trol application. When multiple inputs are being used, they will be combined into a single input value using the method chosen in this field.
There are five strategies to choose from:
• AVG - The average value of all case temperature in-
puts.
• MIN - The lowest sensor value of all the case tem-
perature inputs.
• MAX - The highest sensor value of all the case tem-
perature inputs.
• MIX - A mixture of two inputs, the ratio of which is determined by the Mix % field. Mix will use the Mix % for the Case Temp Combination under the Setpoints screens (refer to Mix Percentage in Sec- tion 8.2.4.4., Comb Method).
• FIRST - The lowest-numbered input that is not shorted, open, or otherwise invalid, will be used as the case temperature input. If you are not using more than one input, set the CombMethd field to First.
Eng Units
Select the engineering units that should be applied to the input type you are using for this sensor control application.
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Engineering Units
DF Degrees Fahrenheit DC Degrees Celsius PSI Pounds Per Square Inch KPA Kilopascals RH Relative Humidity VVolts FTC Foot Candles LUX Light Level PPM Parts Per Million NDF Not Defined
Table 8-6 - Engineering Units Defined
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Appendix A: TD Quick Start
Set Up Motor Room Tem­perature and Plenum Temperature Inputs
NOTE: This section contains an overview for setting up TD Control for CUB-II or CUB-
TD. In this section of the manual, the term "CUB" will be used to mean "CUB-II and, if appro­priate, CUB-TD."
CUB can have up to four motor room tem­perature zones, which are pre-associated with Global Data spare analog inputs 1-4. The default CUB zone is 1, which associates Motor Room Temp 1 to all CUBs in Zone 1. For CUBs, the spare analog inputs must be set up for local only/ degrees fahrenheit, and assigned to an input board and point.
Global Data Setup Example
One 16AI board is needed for this setup example, which will be Board 1. The 16AI has Motor Room Temp 1 on Input 1, and the first plenum temp on Input 9.
To begin programming the CUB-TD, navigate
to the Global Data screen to define Global Data points. Press followed by and to enter Global Data Setup.
If using an E2 controller, press , (Sys-
tem Configuration), up) to enter Global Data Setup.
1. Under S1: Inputs, arrow down to
Spare Anlg Mode and set to Local Only. Press
( for Look Up if using an E2).
(Global Data), (Set-
for Look Up menu
Note that CUB has the option of getting motor room temp from an input on the CUB board itself. If this option is used, the TD board and point assignment will be overridden. See
Section 6.4.2., Motor Room Temperature Con­trol for more information.
Plenum Temperature
Because Global Data Spare Analog Inputs 1-4 are preassigned to Motor Room Temps 1-4, begin setup of plenum temps with Spare Analog Input 5. If Spare Analog Input 5 is being used, begin at the next unoccupied analog input. For example, if four plenum temps are used, they will come from Spare Analog Inputs 5-8.
NOTE: You cannot use Global Data’s SPARE ANLG 01 through 04 inputs for any
purpose other than motor room temps; they are predefined. If you need to use some of Global Da­ta’s “Spare Analog” slots to share values, (plenum temp) use SPARE ANLG 05 through 08.
Figure A-1 - Global Data Setup Local Only Mode
2. Arrow down to Spare Anlg EU and set to DF (Degrees Fahrenheit). Press
for Look Up menu ( for
Look Up if using an E2).
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Figure A-2 - Global Data Setup Degrees Fahrenheit
Figure A-4 - Global Data Setup Spare Analog 5 Mode
3. To set the motor room temperature,
arrow down to SPARE ANALOG IN and arrow right to set Board to 1 and Point to 1.
Figure A-3 - Global Data Setup Board and Point
4. Arrow down to SpareAnlg5 Mode and set to Local Only. Press for Look Up menu (
for Look Up if
using an E2).
5. Arrow down to SpareAnlg5 EU (En­gineering Units) and set to DF (De-
grees Fahrenheit). Press
for Look
Up menu ( for Look Up if using an E2).
Figure A-5 - Global Data Setup Spare Analog 5 EU
6. Arrow down to SPARE ANLG5 IN and arrow right to set Board to 1, and Point to 9.
Set Up Motor Room Temperature and Plenum Temperature Inputs Appendix A: TD Quick Start • 63
Page 74
Figure A-6 - Spare Analog 5 Input Board/Point
Configuring Setpoints in E2 or Einstein for CUB-TD
The CUB application in E2 and Einstein looks the same for both CUB and CUB-TD ver­sions of the MultiFlex CUB. However, since the CUB-TD’s functionality is limited to condenser control, not all parameters visible in the E2 and Einstein setup screens will apply to the CUB­TD. If you are setting up a CUB-TD, this section will walk you through setting up only the inputs, outputs, and setpoints that pertain to the CUB­TD.
Inputs
These input points (motor room temp and ple­num temp) come from Global Data because they are shared among multiple CUB TDs. Refer to
Set Up Motor Room Temperature and Plenum Temperature Inputs on page 62 for more infor-
mation about Global Data setup for motor room and plenum temperature.
1. From the MultiFlex CUB Status screen, press and to set up In­puts (press
CUB Status screen if using an E2).
2. Press
from the MultiFlex
to move to the Inputs tab,
and set Controller, Application, and Output for plenum temp.
Figure A-7 - CUB Setup Plenum Temp
3. Set Controller to the name of the
Einstein that is currently being set up (the controller you are setting the CUB TDs to). Next, set Application to GLOBAL DATA and Output to SPARE ANLG5 OUT (the Spare Analog Out the plenum temp for this CUB is assigned to).
4. Press to exit screen and save changes, or to return to the Home
screen.
If using an E2, press to exit and save or
to return to the Home screen.
CUB Inputs
From the MultiFlex CUB Status screen, press
and to set up CUB Inputs (press
from the MultiFlex CUB Status screen if using an E2).
1. Press
2. Set Offset to 0 (zero). The rest of the
to move to the CUB Inputs
tab, and set Input 1 to Dropleg Temp, and Type 1 to Temperature.
Press for Look Up menu ( for Look Up if using an E2).
Inputs on this screen should be set to
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None, the Input Types to None, and Offsets to 0 (zero).
3. Press to exit screen and save changes, or
to return to the Home
screen.
If using an E2, press to exit and save or
to return to the Home screen.
Figure A-9 - CUB Outputs
General
From the MultiFlex CUB Status screen, press
and to access General tab options (press
from the MultiFlex CUB Status screen if us-
ing an E2).
Figure A-8 - CUB Inputs Setup DropLeg Temperature
CUB Outputs
From the MultiFlex CUB Status screen, press
and to set up Outputs (press from
the MultiFlex CUB Status screen if using an E2).
1. Press
2. Press to exit screen and save
If using an E2, press to exit and save or
to return to the Home screen.
to move to the CUB Out-
puts tab, and set Outputs 1-4 to Con­denser Fans 1-4, respectively
(depending on the number of fans be­ing controlled). Press Up menu (
if using an E2).
changes, or to return to the Home screen.
for Look
1. Arrow down to the Num Cond Fans
field and set the number of fans to be controlled. This number should match the number of condenser fans set in Outputs under the CUB Outputs tab (CUB Outputs on page 65).
2. Arrow down to Network Alm field and set to ENABLE to enable net­work alarming. If network alarming is enabled, the CUB output configured as Alarm type will turn ON when the network loses communication with the controller.
For example, Network Alm is set to ENABLE (Figure A-10), and Output 8 is set as the Alarm output (Figure A-9).
3. Application names can be user de­fined. To change the name of the TD application from the default, arrow up to the Name field and enter the de­sired name.
Configuring Setpoints in E2 or Einstein for CUB-TD Appendix A: TD Quick Start • 65
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5. To set the DropLeg Offset, arrow
down to the Drop Leg Offset field and enter the desired number (the de­fault is 0). DropLeg Offset is a way of adding or subtracting an offset to the drop leg temperature sensor reading (if needed) in order to tune the indi­vidual condensing unit.
6. To set the Condenser Fan On Delay,
arrow down to the Cond Fan On Dly field and enter the desired number (the default is 30). This setpoint de­fines the amount of time that must elapse between activation of fan stag­es. Enter the desired delay in hours:minutes:seconds (H:MM:SS).
Figure A-10 - General Tab in CUB TD Setup
Setpoints
Press to move to the Setpoints tab.
1. To set the TD Setpoint, arrow down to
the TD setpoint field and enter the desired number (the default is 15.0). TD Setpoint is the setpoint that is maintained by cycling fans ON and OFF.
2. To set TD deadband, arrow down to
the TD deadband field and enter the desired number (the default is 1.0). TD deadband forms a range of TD values equally above and below the setpoint within which the control TD value is considered to be within lim­its.
3. To set the DropLeg Maximum, arrow
down to the Drop Leg Max field and enter the desired number (the default is 100.0). If the DropLeg Temp rises above this setpoint, the fans will stage ON using Condenser Fan On Delay.
7. To set the Condenser Fan Off Delay,
arrow down to the Cond Fan Of Dly field and enter the desired number (the default is 30). This setpoint de­fines the amount of time that must elapse between deactivation of fan stages. Enter the desired delay in hours:minutes:seconds (H:MM:SS).
Figure A-11 - Setpoints Tab in CUB TD Setup
4. To set the DropLeg Minimum, arrow
down to the Drop Leg Min field and enter the desired number (the default is 70.0). If the DropLeg Temp falls below this setpoint, the fans will stage OFF using Condenser Fan Off Delay.
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Alarms
Press to move to the Alarms tab.
1. To set the high alarm setpoint for drop leg temperature, arrow down to the Drop Leg High field and enter the
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desired number (the default is NONE).
2. To set the alarm delay setpoint for drop leg temperature, arrow down to Drop Leg Dly field and enter the de­sired time in hours:minutes (HHH:MM).
3. To set the high alarm setpoint for tem­perature differential, arrow down to the TD High field and enter the de­sired number (the default is NONE).
4. To set the alarm delay setpoint for drop leg temperature differential, ar­row down to TD Dly field and enter the desired time in hours:minutes (HHH:MM).
Figure A-12 - Alarms Tab in CUB TD Setup
to exit screen and save changes, or
Press
to return to the Home screen.
If using an E2, press to exit and save or
to return to the Home screen.
Configuring Setpoints in E2 or Einstein for CUB-TD Appendix A: TD Quick Start • 67
Page 78
Appendix B: Case Type Defaults
The table below lists the 64 default case types that may be used in CUB applications along with the recommended defaults for each case type.
When one of these 64 case types is selected, the CUB automatically enters the following information from the table into the Circuit appli­cation:
• The setpoint, and
• The number of defrosts per day and the
defrost time length from the Elec column
under Defrost Type.
For example, if you select #14 “RIFF” (reach-in frozen food), the CUB sets the circuit’ s setpoint at -10, the number of defrosts at 1, and the defrost time at 60 minutes.
The other columns in this table, such as the
High Alarm, Low Alarm, Delay, Hot Gas, Rev. Air, and Timed columns, are suggested
values that are not automatically entered into the CUB application.
High Alarm, Low Alarm, and Delay
The High Alarm, Low Alarm, and Delay
columns are the suggested high and low case temperature alarm setpoints and the report delay . To set up these alarm setpoints and delays, go into the CUB application in E2 or Einstein.
Defrost Type
When a Case Type is defined, the CUB assumes by default that the defrost type is Elec­tric. The CUB also supports Off Cycle defrost type. If using Off Cycle defrost, you will have to enter new values for the number of defrosts (Num Defr Scheds) and the defrost times (Defr Time) in the CUB Defrost Setup screen. Hot Gas, and Rev . Air defrost types are not supported by the CUB.
The suggested defaults are listed under the Timed column in Table B-1 below. The number to the left of the slash indicates the suggested number of defrost times per day (Num Defr Scheds), and the number to the right of the slash indicates the recommended defrost time length (Defrost Dur.).
Type Abbr. Description Set
0 **** Undefined 1 SDIC Single deck ice cream -25 -5° -30° 01:00 2/18 1/45 1/60 1/60 2 MDIC Multi-deck ice cream -25 -5° -30° 01:00 3/22 3/45 2/60 2/60 3 SDFJ Single deck freezer juice -18 0° -30° 01:00 2/18 1/45 1/60 1/60 4 MDFJ Multi-deck freezer juice -10 5° -25° 01:00 3/22 3/45 2/60 2/60 5 RIIC Reach-in ice cream -15 -5° -25° 01:00 2/22 1/45 1/60 1/60 6 ICBX Ice cream freezer box -20 -5° -30° 01:00 3/20 2/45 2/60 2/60 7 SDFF Single deck freezer food -15 5° -25° 01:00 2/18 1/60 1/60 1/60 8 RIFJ Reach-in freezer juice -15 -5° -20° 00:15 2/22 1/45 1/60 1/60
9 FRBX Frozen food box -12 -5° -20° 00:15 3/18 3/45 2/60 2/60 10 FFBX Frozen fish box -12 -5° -20° 00:15 3/18 3/45 2/60 2/60 11 FJBX Frozen juice box -12 -5° -25° 01:00 3/18 3/45 2/60 2/60 12 MDFF Multi-deck freezer food -10 0° -20° 01:00 2/22 1/45 2/60 2/60 13 FZBK Multi-deck freezer bak-
ery 14 RIFF Reach-in freezer food -10 5° -15° 01:00 1/20 1/60 1/60 1/60 15 SDMT Single deck meat 22 32° 12° 01:00 3/18 3/45 3/60 3/60 16 SDPF Single deck prepared 22 32° 12° 01:00 3/18 3/45 3/60 3/60 17 PZZA Single deck pizza 22 32° 12° 01:00 3/18 3/45 3/60 3/60 18 KOSH Single deck kosher 22 32° 12° 01:00 3/18 3/45 3/60 3/60
Table B-1 - Case Type Default Settings
Point
-10 0° -20° 01:00 2/22 1/45 2/60 2/60
High
Alarm
Low
Alarm
Delay Hot Gas Elec.
Defrost Type
(DEF)
Rev. Air Timed
68 • MultiFlex CUB-II and CUB-TD I&O Guide 026-1705 Rev 7 06-APR-2010
Page 79
Type Abbr. Description Set
Point
High
Alarm
Low
Alarm
Delay Hot Gas Elec.
(DEF)
Rev. Air Timed
19 SDFH Single deck fish 22 32° 12° 01:00 3/18 3/45 3/60 3/60 20 MDMT Multi-deck meat 23 34° 18° 01:00 4/18 4/45 4/60 4/60 21 MDPO Multi-deck poultry 23 34° 18° 01:00 4/18 4/45 4/60 4/60 22 MDFH Multi-deck fish 23 34° 18° 01:00 4/18 4/45 4/60 4/60 23 RIMC Reach-in meat 25 35° 15° 01:00 2/18 2/45 2/60 2/60 24 SVMT Service meat 22 35° 15° 01:00 2/18 2/45 2/60 2/60 25 SVFH Service fish 22 35° 15° 01:00 2/18 2/45 2/60 2/60 26 MTBX Meat cooler 30 42° 22° 01:00 3/18 3/45 2/60 2/60 27 HDBX Meat holding box 30 44° 22° 01:00 3/18 3/45 2/60 2/60 28 DYCS Multi-deck dairy 35 44° 24° 01:00 4/20 4/45 2/60 4/60 29 RFDY Rear load dairy 28 38° 18° 01:00 4/20 4/45 2/60 4/45 30 RIDY Reach-in dairy 30 40° 20° 01:00 4/20 4/45 2/60 2/60 31 DYBX Dairy cooler 34 44° 24° 01:00 2/22 2/45 2/60 2/60 32 BKBX Bakery Cooler 36 46° 26° 01:00 2/22 2/45 2/60 2 /60 33 PRBX Produce cooler box 36 50° 30° 01:00 2/22 2/45 2/60 2/60 34 MILK Milk case 34 40° 20° 01:00 4/20 4/45 2/60 2/60 35 PKDL Packaged deli 32 38° 18° 01:00 4/20 4/45 2/60 2/60 36 DLDS Deli display case 34 38° 18° 01:00 4/20 4/45 2/60 2/60 37 CHEZ Cheese case 34 40° 20° 01:00 3/18 3/45 2/45 2/60 38 POBX Poultry box 36 42° 22° 01:00 4/20 4/45 2/45 2/60 39 BEER Beer/Beverage 34 44° 24° 01:00 2/18 2/45 2/45 2/60 40 BVCS Beverage case 34 44° 24° 01:00 2/18 2/45 2/45 2/60 41 DLBX Deli cooler box 36 46° 26° 01:00 3/18 3/45 2/45 2/60 42 FHBX Fish cooler box 36 46° 26° 01:00 3/18 3/45 2/45 2/60 43 SVDL Service deli 32 42° 22° 01:00 2/16 2/45 2/60 1/40 44 PRCS Produce case 35 45° 25° 01:00 2/16 2/45 2/60 3/40 45 ISPR Produce case (island) 35 45° 25° 01:00 2/16 2/45 2/60 1/60 46 SALD Salad table 36 50° 30° 01:00 2/16 2/45 2/60 1/60 47 FLBX Flower cooler box 40 54° 34° 01:00 2/16 2/45 2/60 2/40 48 FLWR Flower cooler 40 54° 34° 01:00 2/16 2/45 2/60 2/40 49 CTBX Controlled temp box 50 75° 40° 00:15 2/16 2/45 2/60 2/45 50 SDPO Single deck poultry 24 38° 18° 01:00 2/16 2/45 2/45 2/60 51 CAKE Bakery cake case 40 55° 35° 01:00 2/16 2/45 2/45 2/60 52 BART Bakery retarder 35 60° 40° 01:00 2/16 2/45 2/45 2/60 53 RTDR Bakery retarder 35 60° 40° 01:00 2/16 2/45 2/45 2/60 54 MTPK Meat packaging room 45 60° 40° 01:00 2/16 2/45 2/45 2/90 55 MTCU Meat cutting room 45 60° 40° 01:00 2/16 2/45 2/45 2/90 56 MTPR Meat prep room 45 60° 40° 01:00 2/16 2/45 2/45 2/90 57 MTWR Meat wrapping room 45 60° 40° 01:00 2/16 2/45 2/45 2/90 58 FHPR Fish prep room 45 60° 40° 01:00 2/16 2/45 2/45 2/90 59 SBCL Subcooler 55 60° 45° 00:15 2/16 2/45 2/60 2/45 60 PRPR Produce prep room 55 65° 45° 01:00 2/16 2/45 2/45 2/90 61 SDFM Single deck freezer meat -10 0° -20° 01:00 2/18 2/40 1/35 1/45 62 RIFM Reach-in freezer meat -10 2° -18° 01:00 2/18 2/40 1/35 1/45 63 MDFM Multi-deck freezer meat -10 0° -20° 01:00 2/18 2/40 2/60 2/45 64 BKFZ Bakery freezer box -12 -2° -22° 01:00 2/18 2/30 2/60 2/45
Table B-1 - Case Type Default Settings
Defrost Type
Configuring Setpoints in E2 or Einstein for CUB-TD Appendix B: Case Type Defaults • 69
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