AQUASNAP® 30MPA,MPW015-045 Liquid Chillers with Scroll Compressors
and ComfortLink™ Controls
Controls, Start-Up, Operation,
Service, and Troubleshooting
SAFETY CONSIDERATIONS
Installing, starting up, and servicing this equipment can be hazardous due to system pressures, electrical components, and equipment location (elevated structures, mechanical rooms, etc.). Only trained, qualified installers and service mechanics should install, start up, and service this equipment.
When working on this equipment, observe precautions in the literature, and on tags, stickers, and labels attached to the equipment, and any other safety precautions that apply. Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting this equipment, and in handling all electrical components.
WARNING
Electrical shock can cause personal injury and death. Shut off all power to this equipment during installation. There may be more than one disconnect switch. Tag all disconnect locations to alert others not to restore power until work is completed.
WARNING
DO NOT VENT refrigerant relief valves within a building. Outlet from relief valves must be vented outdoors in accordance with the latest edition of ANSI/ASHRAE (American National Standards Institute/American Society of Heating, Refrigerating and Air Conditioning Engineers) 15 (Safety Code for Mechanical Refrigeration). The accumulation of refrigerant in an enclosed space can displace oxygen and cause asphyxiation. Provide adequate ventilation in enclosed or low overhead areas. Inhalation of high concentrations of vapor is harmful and may cause heart irregularities, unconsciousness or death. Misuse can be fatal. Vapor is heavier than air and reduces the amount of oxygen available for breathing. Product causes eye and skin irritation. Decomposition products are hazardous.
WARNING
DO NOT attempt to unbraze factory joints when servicing this equipment. Compressor oil is flammable and there is no way to detect how much oil may be in any of the refrigerant lines. Cut lines with a tubing cutter as required when performing service. Use a pan to catch any oil that may come out of the lines and as a gage for how much oil to add to system. DO NOT re-use compressor oil. Damage to equipment or personal injury may result.
CAUTION
This unit uses a microprocessor-based electronic control system. Do not use jumpers or other tools to short out components, or to bypass or otherwise depart from recommended procedures. Any short-to-ground of the control board or accompanying wiring may destroy the electronic modules or electrical components.
CAUTION
To prevent potential damage to heat exchanger, always run fluid through heat exchanger when adding or removing refrigerant charge. Use appropriate brine solutions in cooler fluid loop to prevent the freezing of brazed plate heat exchanger when the equipment is exposed to temperatures below 32 F (0° C). Proof of flow switch is factory installed on all models. Do NOT remove power from this chiller during winter shutdown periods without taking precaution to remove all water from heat exchanger and optional hydronic system. Failure to properly protect the system from freezing may constitute abuse and may void warranty.
CAUTION
Compressors require specific rotation. Monitor control alarms during first compressor start up for reverse rotation protection. Damage to unit may result.
CAUTION
Refrigerant charge must be removed slowly to prevent loss of compressor oil that could result in compressor failure.
CAUTION
Puron® refrigerant (R-410A) systems operate at higher pressures than standard R-22 systems. Do not use R-22 service equipment or components on Puron refrigerant equipment. If service equipment is not rated for Puron refrigerant, equipment damage or personal injury may result.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300053-01 |
Printed in U.S.A. |
Form 30MP-1T |
Pg 1 |
1-10 |
Replaces: New |
CONTENTS
Page
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . 1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . 2
Basic Controls Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-33 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Main Base Board (MBB). . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Energy Management Module (EMM). . . . . . . . . . . . . . . . 14
Current Sensor Board (CSB) . . . . . . . . . . . . . . . . . . . . . . . 14
Enable/Off/Remote Contact Switch. . . . . . . . . . . . . . . . . 14
Emergency On/Off Switch. . . . . . . . . . . . . . . . . . . . . . . . . . 14 Board Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Control Module Communication . . . . . . . . . . . . . . . . . . . 14 Carrier Comfort Network® Interface . . . . . . . . . . . . . . . . 14
Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
•COOLER LEAVING FLUID SENSOR
•COOLER ENTERING FLUID SENSOR
•CONDENSER LEAVING FLUID SENSOR
•CONDENSER ENTERING FLUID SENSOR
•COMPRESSOR RETURN GAS TEMPERATURE SENSOR
•OUTDOOR-AIR TEMPERATURE SENSOR
•DUAL LEAVING WATER TEMPERATURE SENSOR
•REMOTE SPACE TEMPERATURE SENSOR
Energy Management Module . . . . . . . . . . . . . . . . . . . . . . . 21
Loss-of-Cooler Flow Protection . . . . . . . . . . . . . . . . . . . . 21
Condenser Flow Protection . . . . . . . . . . . . . . . . . . . . . . . . 21
Thermostatic Expansion Valves (TXV) . . . . . . . . . . . . . 21
Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
•MINUTES LEFT FOR START
•MINUTES OFF TIME
•LEAD/LAG DETERMINATION
•CAPACITY CONTROL OVERRIDES
Operation of Machine Based on Control Method
and Cooling Set Point Selection Settings . . . . . . . . 24
Cooling Set Point Select . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Cooler Pump Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Ice Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Service Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cooler Pump Sequence of Operation . . . . . . . . . . . . . . 25
Condenser Pump/Condenser Fan Output
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Configuring and Operating Dual Chiller Control. . . . 25
Temperature Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
•DEMAND LIMIT (2-Stage Switch Controlled)
•EXTERNALLY POWERED DEMAND LIMIT (4 to 20 mA Controlled)
•DEMAND LIMIT (CCN Loadshed Controlled)
Cooling Set Point (4 to 20 mA) . . . . . . . . . . . . . . . . . . . . . 32
PRE-START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33,34 System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
START-UP AND OPERATION . . . . . . . . . . . . . . . . . . . . 34-36 Actual Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Check Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . 34 Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
•TEMPERATURES
•VOLTAGE — ALL UNITS
OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . 36
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-44
Electronic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
• CONTROL COMPONENTS
Compressor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 36
30MPW Condenser and 30MP Cooler . . . . . . . . . . . . . . 36
•BRAZED-PLATE COOLER AND CONDENSER HEAT EXCHANGER REPLACEMENT
•BRAZED-PLATE COOLER AND CONDENSER
HEAT EXCHANGER CLEANING
Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Check Refrigerant Feed Components . . . . . . . . . . . . . . 37
•FILTER DRIER
•MOISTURE-LIQUID INDICATOR
•THERMOSTATIC EXPANSION VALVE (TXV)
•MINIMUM LOAD VALVE
•PRESSURE RELIEF DEVICES
Check Unit Safeties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Thermistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Chilled Water Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . 39
Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Replacing Defective Modules. . . . . . . . . . . . . . . . . . . . 43
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44,45
Recommended Maintenance Schedule . . . . . . . . . . . . 44
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .44-52
Complete Unit Stoppage and Restart . . . . . . . . . . . . . . 44
•GENERAL POWER FAILURE
•UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS OFF
•CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN
•OPEN 24-V CONTROL CIRCUIT BREAKERS
•COOLING LOAD SATISFIED
•THERMISTOR FAILURE
•LOW SATURATED SUCTION
•COMPRESSOR SAFETIES
Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
APPENDIX A — LOCAL DISPLAY TABLES . . . . . . .53-64
APPENDIX B — CCN TABLES. . . . . . . . . . . . . . . . . . . .65-72
START-UP CHECKLIST FOR 30MP LIQUID
CHILLER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CL-1 to CL-8
GENERAL
This publication contains Start-Up, Service, Controls, Operation, and Troubleshooting information for the 30MPW watercooled chillers and the 30MPA air-cooled chillers. See Table 1. These liquid chillers are equipped with ComfortLink controls and conventional thermostatic expansion valves (TXVs). The 30MPA units and the 30MPW units with optional medium temperature brine are also equipped with liquid line solenoid valves (LLSVs).
CAUTION
This unit uses a microprocessor-based electronic control system. Do not use jumpers or other tools to short out or bypass components or otherwise depart from recommended procedures. Any short-to-ground of the control board or accompanying wiring may destroy the board or electrical component.
Table 1 — Unit Sizes
UNIT MODEL |
NOMINAL TONS |
30MPA,MPW015 |
15 |
30MPA,MPW020 |
20 |
30MPA,MPW030 |
30 |
30MPA,MPW040 |
40 |
30MPA,MPW045 |
45 |
Conventions Used in This Manual — The following conventions for discussing configuration points for the local display (scrolling marquee or Navigator™ accessory) will be used in this manual.
Point names will be written with the mode name first, then any sub-modes, then the point name, each separated by an arrow symbol ( . Names will also be shown in bold and italics. As an example, the Minimum Load Valve Select Point, which is located in the Configuration mode, Option 1 sub-mode, would be written as Configuration OPT1
MLV.S.
This path name will show the user how to navigate through the local display to reach the desired configuration. The user would scroll through the modes and sub-modes using the and keys. The arrow symbol in the path name represents pressing ENTER to move into the next level of the
menu structure.
2
When a value is included as part of the path name, it will be shown at the end of the path name after an equals sign. If the value represents a configuration setting, an explanation will be shown in parenthesis after the value. As an example,
Configuration OPT1 MLV.S = 1 (Minimum Load Valve Select).
Pressing the ESCAPE and ENTER keys simultaneously will scroll an expanded text description of the point name or
value across the display. The expanded description is shown in the local display tables but will not be shown with the path names in text.
The CCN (Carrier Comfort Network®) point names are also referenced in the local display tables for users configuring the unit with CCN software instead of the local display. The CCN tables are located in Appendix B of the manual.
Basic Control Usage
SCROLLING MARQUEE DISPLAY — The scrolling marquee display is the standard interface display to the ComfortLink Control System for 30MP units. The display has up and down arrow keys, an ENTER key, and an ESCAPE key. These keys are used to navigate through the different levels of the display structure. Press the ESCAPE key until the highest operating level is displayed to move through the top 11 mode levels indicated by LEDs (light emitting diodes) on the left side of the display. See Fig. 1 and Tables 2-14.
Once within a mode or sub-mode, pressing the ENTER and ESCAPE keys simultaneously will put the scrolling marquee display into expanded text mode where the full meaning of all sub-modes, items and their values can be displayed for the current selection. Press the ENTER and ESCAPE keys to return the scrolling marquee display to its default menu of rotating display items (those items in Run Status VIEW). In addition, the password will be disabled, requiring that it be entered again before changes can be made to password protected items. Press the ESCAPE key to exit out of the expanded text mode.
NOTE: When the Language Selection (Configuration DISP LANG), variable is changed, all appropriate display expansions will immediately change to the new language. No power-off or control reset is required when reconfiguring languages.
When a specific item is located, the item name alternates with the value. Press the ENTER key at a changeable item and the value will be displayed. Press ENTER again and the value will begin to flash indicating that the value can be changed. Use the up and down arrow keys to change the value, and confirm the value by pressing the ENTER key.
MODE |
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Run Status |
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Service Test |
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Temperature |
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Pressures |
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Setpoints |
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Inputs |
Alarm Status |
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Outputs |
ESCAPE |
ENTER |
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Configuration |
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Time Clock |
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Operating Modes |
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Alarms |
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Fig. 1 — Scrolling Marquee Display
Changing item values or testing outputs is accomplished in the same manner. Locate and display the desired item. Press ENTER so that the item value flashes. Use the arrow keys to change the value or state and press the ENTER key to accept it. Press the ESCAPE key to return to the next higher level of structure. Repeat the process as required for other items.
Items in the Configuration and Service Test modes are password protected. The words ‘PASS’ and ‘WORD’ will alternate on the display when required. The default password is 0111. Press ENTER and the 1111 password will be displayed. Press
ENTER again and the first digit will begin to flash. Use the arrow keys to change the number and press ENTER to accept
the digit. Continue with the remaining digits of the password. The password can only be changed through CCN operator interface software such as ComfortWORKS®, ComfortVIEW™ and Service Tool.
See Tables 2-14 and Appendix A for further details.
ACCESSORY NAVIGATOR™ DISPLAY MODULE — The Navigator module provides a mobile user interface to the
ComfortLink™ control system, which is only available as a field-installed accessory. The display has up and down arrow keys, an ENTER key, and an ESCAPE key. These keys are used to navigate through the different levels of the display structure. Press the ESCAPE key until ‘Select a Menu Item’ is displayed to move through the top 11 mode levels indicated by LEDs on the left side of the display. See Fig. 2.
Once within a Mode or sub-mode, a “>” indicates the currently selected item on the display screen. Pressing the ENTER and ESCAPE keys simultaneously will put the Navigator module into expanded text mode where the full meaning of all sub-modes, items and their values can be displayed. Pressing the ENTER and ESCAPE keys when the display says ‘Select Menu Item’ (Mode LED level) will return the Navigator module to its default menu of rotating display items (those items in Run Status VIEW). In addition, the password will be disabled, requiring that it be entered again before changes can be made to password protected items. Press the ESCAPE key to exit out of the expanded text mode.
NOTE: When the Language Selection (Configuration DISP LANG), variable is changed, all appropriate display expansions will immediately change to the new language. No power-off or control reset is required when reconfiguring languages.
When a specific item is located, the item name appears on the left of the display, the value will appear near the middle of the display and the units (if any) will appear on the far right of the display. Press the ENTER key at a changeable item and the value will begin to flash. Use the up and down arrow keys to change the value, and confirm the value by pressing the ENTER key.
Changing item values or testing outputs is accomplished in the same manner. Locate and display the desired item. Press ENTER so that the item value flashes. Use the arrow keys to change the value or state and press the ENTER key to accept it. Press the ESCAPE key to return to the next higher level of structure. Repeat the process as required for other items.
Items in the Configuration and Service Test modes are password protected. The words Enter Password will be displayed when required, with 1111 also being displayed. The default password is 1111. Use the arrow keys to change the number
3
and press ENTER to enter the digit. Continue with the remaining digits of the password. The password can only be changed through CCN operator interface software such as ComfortWORKS, ComfortVIEW and Service Tool.
Adjusting the Contrast — The contrast of the display can be adjusted to suit ambient conditions. To adjust the contrast of the Navigator module, press the ESCAPE key until the display reads, “Select a menu item.” Using the arrow keys move to the Configuration mode. Press ENTER to obtain access to this mode. The display will read:
> TEST OFF
METR OFF LANG ENGLISH
Pressing ENTER will cause the “OFF” to flash. Use the up or down arrow to change “OFF” to “ON”. Pressing ENTER will illuminate all LEDs and display all pixels in the view screen. Pressing ENTER and ESCAPE simultaneously allows the user to adjust the display contrast. Use the up or down arrows to adjust the contrast. The screen’s contrast will change with the adjustment. Press ENTER to accept the change. The Navigator module will keep this setting as long as it is plugged in to the LEN bus.
Adjusting the Backlight Brightness — The backlight of the display can be adjusted to suit ambient conditions. The factory default is set to the highest level. To adjust the backlight of the Navigator module, press the ESCAPE key until the display reads, “Select a menu item.” Using the arrow keys move to the
Configuration mode. Press ENTER to obtain access to this mode. The display will read:
> TEST OFF
METR OFF LANG ENGLISH
Pressing ENTER will cause the “OFF” to flash. Use the up or down arrow keys to change “OFF” to “ON”. Pressing ENTER will illuminate all LEDs and display all pixels in the view screen. Pressing the up and down arrow keys simultaneously allows the user to adjust the display brightness. Use the up or down arrow keys to adjust screen brightness. Press ENTER to accept the change. The Navigator module will keep this setting as long as it is plugged in to the LEN bus.
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Comfort |
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Link |
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MODE |
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Run |
Status |
Alarm |
Status |
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Service Test |
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PTemperatures |
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ressures |
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Setpoints |
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Inputs |
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Outputs |
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Configuration |
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Time |
Clock |
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ESC |
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Operating |
Modes |
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Alarms |
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ENTER |
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Fig. 2 — Accessory Navigator™ Display Module
Table 2 — Scrolling Marquee Display Menu Structure*
MODE |
RUN |
SERVICE |
TEMPERATURES |
PRESSURES |
SET |
INPUTS |
OUTPUTS |
CONFIGURATION |
TIME |
OPERATING |
ALARMS |
STATUS |
TEST |
POINTS |
CLOCK |
MODES |
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Auto |
Service |
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Pressures |
Cooling |
General |
General |
Display |
Time of |
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View of |
Unit Temperatures |
Modes |
Current |
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Test Mode |
Circuit A |
Setpoints |
Inputs |
Outputs |
Configuration |
Day |
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Run Status |
(UNIT) |
(MODE) |
(CRNT) |
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(TEST) |
(PRC.A) |
(COOL) |
(GEN.I) |
(GEN.O) |
(DISP) |
(TIME) |
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(VIEW) |
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Unit Run |
Outputs |
Temperatures |
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Head |
Circuit |
Outputs |
Unit |
Month, |
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Reset |
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Hour and |
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Pressure |
Date, Day, |
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and Pumps |
Circuit A |
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Inputs |
Circuit A |
Configuration |
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Alarms |
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Start |
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Setpoint |
and Year |
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(OUTS) |
(CIR.A) |
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(CRCT) |
(CIR.A) |
(UNIT) |
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(RCRN) |
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(RUN) |
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(HEAD) |
(DATE) |
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Circuit and |
Ciruit A Comp |
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Brine |
4-20mA |
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Unit Options 1 |
Daylight |
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Alarm |
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Compressor |
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Freeze |
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Savings |
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Run Hours |
Test |
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Setpoint |
Inputs |
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Hardware |
Time |
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History |
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(CMPA) |
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(4-20) |
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(OPT1) |
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(HIST) |
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(HOUR) |
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(DST) |
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Compressor |
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Unit Options 2 |
Local |
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Holiday |
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Starts |
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Controls |
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Schedules |
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(STRT) |
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(OPT2) |
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SUB-MODE |
Preventive |
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CCN Network |
Schedule |
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Maintenance |
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Configuration |
Number |
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(PM) |
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(CCN) |
(SCH.N) |
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Local |
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Software |
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Reset Cool Temp |
Occu- |
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Version |
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(RSET) |
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(VERS) |
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Schedule |
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(SCH.L) |
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Set Point and |
Schedule |
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Ramp Load |
Override |
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(SLCT) |
(OVR) |
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Service |
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Configuration |
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(SERV) |
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Broadcast |
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Configuration |
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(BCST) |
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LEGEND |
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For example, using the language selection item: |
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Ckt — Circuit |
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Language Selection (Configuration DISP LANG) |
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*Throughout this text, the location of items in the menu structure will be described in the following format:
Item Expansion (Mode Name Sub-mode Name ITEM)
4
Table 3 — Run Status Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
SUB-ITEM |
DISPLAY |
SUB-ITEM |
DISPLAY |
ITEM |
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COMMENT |
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ENTRY |
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EXPANSION |
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VIEW |
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EWT |
XXX.X F |
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ENTERING FLUID TEMP |
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ENTER |
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LWT |
XXX.X F |
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LEAVING FLUID TEMP |
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SETP |
XXX.X F |
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ACTIVE SETPOINT |
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CTPT |
XXX.X F |
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CONTROL POINT |
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LOD.F |
XXX |
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LOAD/UNLOAD FACTOR |
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STAT |
X |
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CONTROL MODE |
0 |
= Service Test |
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1 |
= Off Local |
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2 |
= Off CCN |
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3 |
= Off Time |
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4 |
= Off Emrgcy |
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5 |
= On Local |
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6 |
= On CCN |
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7 |
= On Time |
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8 |
= Ht Enabled |
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9 |
= Pump Delay |
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OCC |
YES/NO |
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OCCUPIED |
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MODE |
YES/NO |
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OVERRIDE MODES IN EFFECT |
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CAP |
XXX % |
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PERCENT TOTAL CAPACITY |
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STGE |
X |
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REQUESTED STAGE |
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ALRM |
XXX |
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CURRENT ALARMS & ALERTS |
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TIME |
XX.XX |
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TIME OF DAY |
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00.00-23.59 |
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MNTH |
XX |
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MONTH OF YEAR |
1 = January, 2 = February, etc. |
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DATE |
XX |
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DAY OF MONTH |
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01-31 |
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YEAR |
XX |
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YEAR OF CENTURY |
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RUN |
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HRS.U |
XXXX HRS |
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MACHINE OPERATING HOURS |
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ENTER |
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STR.U |
XXXX |
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MACHINE STARTS |
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HR.P1 |
XXXX.X |
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PUMP 1 RUN HOURS |
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HR.P2 |
XXXX.X |
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PUMP 2 RUN HOURS |
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HOUR |
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HR.A1 |
XXXX HRS |
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COMPRESSOR A1 RUN HOURS |
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ENTER |
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HR.A2 |
XXXX HRS |
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COMPRESSOR A2 RUN HOURS |
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HR.A3 |
XXXX HRS |
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COMPRESSOR A3 RUN HOURS |
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STRT |
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ST.A1 |
XXXX |
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COMPRESSOR A1 STARTS |
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ENTER |
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ST.A2 |
XXXX |
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COMPRESSOR A2 STARTS |
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ST.A3 |
XXXX |
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COMPRESSOR A3 STARTS |
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PM |
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STRN |
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STRAINER MAINTENANCE |
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ENTER |
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SI.ST |
XXXX HRS |
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STRAINER SRVC INTERVAL |
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ENTER |
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S.T.DN |
XXXX HRS |
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STRAINER SRVC COUNTDOWN |
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S.T.MN |
YES/NO |
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STRAINER MAINT. DONE |
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User Entry |
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ST.DT |
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STRAINER MAINT. DATES |
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S.T.M0 |
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MM/DD/YY HH:MM |
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ENTER |
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S.T.M1 |
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MM/DD/YY HH:MM |
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S.T.M2 |
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MM/DD/YY HH:MM |
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S.T.M3 |
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MM/DD/YY HH:MM |
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S.T.M4 |
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MM/DD/YY HH:MM |
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5
Table 3 — Run Status Mode and Sub-Mode Directory (cont)
SUB-MODE |
KEYPAD |
|
ITEM |
DISPLAY |
SUB-ITEM |
DISPLAY |
SUB-ITEM |
DISPLAY |
ITEM |
COMMENT |
||||
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ENTRY |
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EXPANSION |
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VERS |
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AUX |
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CESR131333-xx-xx |
xx-xx is Version number* |
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ENTER |
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MBB |
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CESR131279-xx-xx |
xx-xx is Version number* |
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EMM |
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CESR131174-xx-xx |
xx-xx is Version number* |
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MARQ |
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CESR131171-xx-xx |
xx-xx is Version number* |
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NAVI |
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CESR130227-xx-xx |
xx-xx is Version number* |
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|||||||||
*Press |
ENTER |
and |
ESCAPE |
simultaneously to obtain version number. |
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Table 4 — Service Test Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
COMMENT |
|||
ENTRY |
EXPANSION |
|||||||
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|||||
TEST |
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ON/OFF |
SERVICE TEST MODE |
To Enable Service Test Mode, |
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|
ENTER |
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|||||
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|
move Enable/Off/Remote |
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Contact switch to OFF. Change |
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TEST to ON. Move switch to |
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ENABLE. |
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OUTS |
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OUTPUTS AND PUMPS |
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CLR.P |
ON/OFF |
COOLER PUMP RELAY |
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CND.P |
ON/OFF |
CONDENSER PUMP |
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UL.TM |
0 to 15 |
COMP A1 UNLOAD TIME |
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CC.H |
ON/OFF |
CRANKCASE HEATER |
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CW.VO |
ON/OFF |
CONDENSER VALVE OPEN |
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CW.VC |
ON/OFF |
CONDENSER VALVE CLOSE |
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LL.SV |
ON/OFF |
LIQUID LINE SOLENOID |
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RMT.A |
ON/OFF |
REMOTE ALARM RELAY |
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CMPA |
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CIRCUIT A COMPRESSOR TEST |
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CC.A1 |
ON/OFF |
COMPRESSOR A1 RELAY |
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ENTER |
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UL.TM |
0 to 15 |
COMP A1 UNLOAD TIME |
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CC.A2 |
ON/OFF |
COMPRESSOR A2 RELAY |
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CC.A3 |
ON/OFF |
COMPRESSOR A3 RELAY |
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MLV |
ON/OFF |
MINIMUM LOAD VALVE RELAY |
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|
Table 5 — Temperature Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
COMMENT |
|||
ENTRY |
EXPANSION |
|||||||
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|||||
UNIT |
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|
ENT AND LEAVE UNIT TEMPS |
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CEWT |
XXX.X F |
COOLER ENTERING FLUID |
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|
ENTER |
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CLWT |
XXX.X F |
COOLER LEAVING FLUID |
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CDET |
XXX.X F |
CONDENSER ENTERING FLUID |
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CDLT |
XXX.X F |
CONDENSER LEAVING FLUID |
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OAT |
XXX.X F |
OUTSIDE AIR TEMPERATURE |
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SPT |
XXX.X F |
SPACE TEMPERATURE |
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DLWT |
XXX.X F |
LEAD/LAG LEAVING FLUID |
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6
Table 5 — Temperature Mode and Sub-Mode Directory (cont)
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
COMMENT |
|||
ENTRY |
EXPANSION |
|||||||
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|||||
CIR.A |
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|
TEMPERATURES CIRCUIT A |
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SCT.A |
XXX.X F |
SATURATED CONDENSING TMP |
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ENTER |
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SST.A |
XXX.X F |
SATURATED SUCTION TEMP |
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RGT.A |
XXX.X F |
COMPR RETURN GAS TEMP |
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D.GAS |
XXX.X F |
DISCHARGE GAS TEMP |
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SH.A |
XXX.X ^F |
SUCTION SUPERHEAT TEMP |
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|
Table 6 — Pressure Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
COMMENT |
|||
ENTRY |
EXPANSION |
|||||||
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|
|||||
PRC.A |
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|
PRESSURES CIRCUIT A |
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DP.A |
XXX.X PSIG |
DISCHARGE PRESSURE |
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ENTER |
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SP.A |
XXX.X PSIG |
SUCTION PRESSURE |
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|
Table 7 — Set Points Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
COMMENT |
|||
ENTRY |
EXPANSION |
|||||||
|
|
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|
|||||
COOL |
|
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|
|
|
COOLING SETPOINTS |
|
|
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|
|
CSP.1 |
XXX.X F |
COOLING SETPOINT 1 |
Default: 44 F |
|
|
|
ENTER |
|
|||||
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CSP.2 |
XXX.X F |
COOLING SETPOINT 2 |
Default: 44 F |
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CSP.3 |
XXX.X F |
ICE SETPOINT |
Default: 32 F |
|
|
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|
HEAD |
|
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|
|
HEAD PRESSURE SETPOINTS |
|
|
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|
|
H.DP |
XXX.X F |
HEAD SETPOINT |
Default: 95 F |
||
|
|
ENTER |
|
|||||
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FRZ |
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BRINE FREEZE SETPOINT |
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BR.FZ |
XXX.X F |
BRINE FREEZE POINT |
Default: 34 F |
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ENTER |
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Table 8 — Inputs Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
COMMENT |
|||
ENTRY |
EXPANSION |
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GEN.I |
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GENERAL INPUTS |
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STST |
STRT/STOP |
START/STOP SWITCH |
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ENTER |
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FLOW |
ON/OFF |
COOLER FLOW SWITCH |
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CD.FL |
OPEN/CLSE |
CONDENSER FLOW SWITCH |
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DLS1 |
ON/OFF |
DEMAND LIMIT SWITCH 1 |
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DLS2 |
ON/OFF |
DEMAND LIMIT SWITCH 2 |
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ICED |
ON/OFF |
ICE DONE |
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DUAL |
ON/OFF |
DUAL SETPOINT SWITCH |
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CRCT |
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CIRCUITS INPUTS |
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FKA1 |
ON/OFF |
COMPRESSOR A1 FEEDBACK |
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ENTER |
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FKA2 |
ON/OFF |
COMPRESSOR A2 FEEDBACK |
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FKA3 |
ON/OFF |
COMPRESSOR A3 FEEDBACK |
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4-20 |
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4-20 MA INPUTS |
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DMND |
XX.X MA |
4-20 MA DEMAND SIGNAL |
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ENTER |
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RSET |
XX.X MA |
4-20 MA RESET SIGNAL |
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CSP |
XX.X MA |
4-20 MA COOLING SETPOINT |
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7
Table 9 — Outputs Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
COMMENT |
|||
ENTRY |
EXPANSION |
|||||||
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GEN.O |
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GENERAL OUTPUTS |
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C.LWP |
ON/OFF |
COOLER PUMP RELAY |
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ENTER |
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C.DWP |
ON/OFF |
CONDENSER PUMP |
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ALRM |
ON/OFF |
ALARM RELAY |
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CDWO |
ON/OFF |
CONDENSER VALVE OPEN |
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CDWC |
ON/OFF |
CONDENSER VALVE CLOSE |
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CIR.A |
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OUTPUTS CIRCUIT A |
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ENTER |
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CC.A1 |
ON/OFF |
COMPRESSOR A1 RELAY |
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D.SOL |
ON/OFF |
DIGITAL SCROLL SOLENOID |
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CC.A2 |
ON/OFF |
COMPRESSOR A2 RELAY |
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CC.A3 |
ON/OFF |
COMPRESSOR A3 RELAY |
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CCH |
ON/OFF |
CRANKCASE HEATER RELAY |
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LLSV |
ON/OFF |
LIQUID LINE SOLENOID |
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MLV.R |
ON/OFF |
MINIMUM LOAD VALVE RELAY |
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|
Table 10 — Configuration Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
COMMENT |
|||
ENTRY |
EXPANSION |
|||||||
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|||||
DISP |
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DISPLAY CONFIGURATION |
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TEST |
ON/OFF |
TEST DISPLAY LEDS |
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ENTER |
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METR |
ON/OFF |
METRIC DISPLAY |
Off = English |
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On = Metric |
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LANG |
X |
LANGUAGE SELECTION |
Default: 0 |
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0 = English |
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1 = Espanol |
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2 = Francais |
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3 = Portuguese |
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PAS.E |
ENBL/DSBL |
PASSWORD ENABLE |
Default: Enable |
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PASS |
xxxx |
SERVICE PASSWORD |
Default: 1111 |
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UNIT |
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UNIT CONFIGURATION |
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ENTER |
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TYPE |
x |
UNIT TYPE |
2=WaterCooled |
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3=Split System |
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SIZE |
XX |
UNIT SIZE |
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SZA.1 |
XX |
COMPRESSOR A1 SIZE |
Unit Dependent |
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SZA.2 |
XX |
COMPRESSOR A2 SIZE |
Unit Dependent |
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SZA.3 |
XX |
COMPRESSOR A3 SIZE |
Unit Dependent |
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A1.TY |
No/Yes |
COMPRESSOR A1 DIGITAL? |
Default: Yes (A1 Digital Scroll) |
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MAX.T |
0 to 15 |
MAXIMUM A1 UNLOAD TIME |
Default: 7 |
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|
8
Table 10 — Configuration Mode and Sub-Mode Directory (cont)
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
|
COMMENT |
||||
ENTRY |
EXPANSION |
|
||||||||
|
|
|
|
|
||||||
OPT1 |
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UNIT OPTIONS 1 HARDWARE |
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Default: Water |
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ENTER |
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FLUD |
X |
COOLER FLUID |
1 = Water |
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2 = Medium Temperature Brine |
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MLV.S |
YES/NO |
MINIMUM LOAD VALVE SELECT |
Default: No |
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R.G.EN |
ENBL/DSBL |
RETURN GAS SENSOR ENABLE |
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OAT.E |
ENBL/DSBL |
ENABLE OAT SENSOR |
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D.G.EN |
ENBL/DSBL |
DISCHARGE GAS TEMP ENABLE |
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CSB.E |
ENBL/DSBL |
CSB BOARDS ENABLE |
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CPC |
ON/OFF |
COOLER PUMP CONTROL |
Default: On |
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|
PM.DY |
XX MIN |
COOLER PUMP SHUTDOWN DLY |
0 to 10 minutes, Default: 1 min. |
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DPME |
x |
ENABLE CONDENSER PUMP |
0 to 2 |
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DFLS |
ENBL/DSBL |
ENABLE COND FLOW SWITCH |
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CDWS |
ENBL/DSBL |
ENABLE COND WTR SENSORS |
|
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|
OPT2 |
|
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|
|
UNIT OPTIONS 2 CONTROLS |
|
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|
|
CTRL |
X |
CONTROL METHOD |
Default: Switch |
|
|
|
|
ENTER |
|
|
|||||
|
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|
|
0 = Enable/Off/Remote Switch |
||
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2 = Occupancy |
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3 = CCN Control |
|
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|
LCWT |
XX.X F |
HIGH LCW ALERT LIMIT |
Default: 60 |
|
|
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|
|
|
Range: |
2 to 60 F |
|||
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|
DELY |
XX |
MINUTES OFF TIME |
Default: 0 Minutes |
|
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|
|
Range: 0 to 15 Minutes |
||||
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ICE.M |
ENBL/DSBL |
ICE MODE ENABLE |
Default: Disable |
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CCN |
|
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|
|
CCN NETWORK CONFIGURATION |
|
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|
|
|
|
CCNA |
XXX |
CCN ADDRESS |
Default: 1 |
|
|
|
|
ENTER |
|
|
Range: |
1 to 239 |
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|
CCNB |
XXX |
CCN BUS NUMBER |
Default: 0 |
|
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|
|
Range: |
0 to 239 |
|||
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BAUD |
X |
CCN BAUD RATE |
Default: 9600 |
|
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1 = 2400 |
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2 = 4800 |
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3 = 9600 |
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4 = 19,200 |
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5 = 38,400 |
|
RSET |
|
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|
|
RESET COOL TEMP |
|
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|
|
|
CRST |
X |
COOLING RESET TYPE |
Default: No Reset |
|
|
|
|
ENTER |
|
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|||||
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0 = No Reset |
|||
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1 = 4 to 20 mA Input |
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2 = Outdoor Air Temperature |
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3 = Return Fluid |
|
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4 = Space Temperature |
|
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|
|
MA.DG |
XX.X F |
4-20 - DEGREES RESET |
Default: 0.0 F |
|
|
|
|
|
|
|
Range: –30 to 30 F |
||||
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||
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|
RM.NO |
XXX.X F |
REMOTE - NO RESET TEMP |
Default: 125 F (51.7 C) |
|
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|
|
|
Range: 0° to 125 F |
||||
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||
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|
RM.F |
XXX.X F |
REMOTE - FULL RESET TEMP |
Default: 0.0 F (-17.8 C) |
|
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|
|
|
Range: |
0 to 125 F |
|||
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||
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|
RM.DG |
XX.X F |
REMOTE - DEGREES RESET |
Default: 0.0 F |
|
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|
|
Range: –30 to 30 F |
||||
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||
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|
RT.NO |
XXX.X F |
RETURN - NO RESET TEMP |
Default: 10.0 F (5.6 C) |
|
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|
|
|
Range: |
0 to 125 F COOLER T |
|||
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||
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|
RT.F |
XXX.X F |
RETURN - FULL RESET TEMP |
Default: 0.0 F (0.0 C) |
|
|
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|
|
|
Range: |
0 to 125 F COOLER T |
|||
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||
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|
RT.DG |
XX.X F |
RETURN - DEGREES RESET |
Default: 0.0 F |
|
|
|
|
|
|
|
Range: –30 to 30 F (–34.4 to -1.1 C) |
||||
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||
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|
DMDC |
X |
DEMAND LIMIT SELECT |
Default: None |
|
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|
0 = None |
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1 = Switch |
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2 = 4 to 20 mA Input |
|
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|
3 = CCN Loadshed |
|
|
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|
|
|
|
DM20 |
XXX % |
DEMAND LIMIT AT 20 MA |
Default: 100% |
|
|
|
|
|
|
|
Range: |
0 to 100% |
|||
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|
SHNM |
XXX |
LOADSHED GROUP NUMBER |
Default: |
0 |
|
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|
|
Range: |
0 to 99 |
|||
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|
SHDL |
XXX % |
LOADSHED DEMAND DELTA |
Default: |
0% |
|
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|
|
|
Range: |
0 to 60% |
|||
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||
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|
SHTM |
XXX |
MAXIMUM LOADSHED TIME |
Default: |
60 minutes |
|
|
|
|
|
|
Range: 0 to 120 minutes |
||||
|
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||
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|
DLS1 |
XXX % |
DEMAND LIMIT SWITCH 1 |
Default: |
80% |
|
|
|
|
|
|
Range: |
0 to 100% |
|||
|
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||
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|
DLS2 |
XXX % |
DEMAND LIMIT SWITCH 2 |
Default: |
50% |
|
|
|
|
|
|
Range: |
0 to 100% |
|||
|
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||
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9
Table 10 — Configuration Mode and Sub-Mode Directory (cont)
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
ITEM |
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COMMENT |
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ENTRY |
EXPANSION |
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LLEN |
ENBL/DSBL |
LEAD/LAG CHILLER ENABLE |
Default: Disable |
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MSSL |
SLVE/MAST |
MASTER/SLAVE SELECT |
Default: Master |
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SLVA |
XXX |
SLAVE ADDRESS |
Default: |
0 |
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Range: |
0 to 239 |
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RSET |
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ENTER |
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Default: Master Leads |
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LLBL |
X |
LEAD/LAG BALANCE SELECT |
0 = Master Leads |
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(cont) |
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1 = Slave Leads |
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2 = Automatic |
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LLBD |
XXX |
LEAD/LAG BALANCE DELTA |
Default: |
168 hours |
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Range: |
40 to 400 hours |
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LLDY |
XXX |
LAG START DELAY |
Default: |
5 minutes |
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Range: |
0 to 30 minutes |
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PARA |
YES |
PARALLEL CONFIGURATION |
Default: YES (CANNOT BE CHANGED) |
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SLCT |
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SETPOINT AND RAMP LOAD |
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CLSP |
X |
COOLING SETPOINT SELECT |
Default: Single |
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ENTER |
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0 = Single |
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1 = Dual Switch |
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2 = Dual CCN Occupied |
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3 = 4 to 20 mA Input (requires |
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EMM) |
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RL.S |
ENBL/DSBL |
RAMP LOAD SELECT |
Default: Enable |
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CRMP |
X.X |
COOLING RAMP LOADING |
Default: |
1.0 |
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Range: |
0.2 to 2.0 |
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SCHD |
XX |
SCHEDULE NUMBER |
Default: |
1 |
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Range: |
1 to 99 |
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Z.GN |
X.X |
DEADBAND MULTIPLIER |
Default: |
1.0 |
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Range: |
1.0 to 4.0 |
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SERV |
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SERVICE CONFIGURATION |
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EN.A1 |
ENBL/DSBL |
ENABLE COMPRESSOR A1 |
Unit dependent |
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ENTER |
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EN.A2 |
ENBL/DSBL |
ENABLE COMPRESSOR A2 |
Unit dependent |
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EN.A3 |
ENBL/DSBL |
ENABLE COMPRESSOR A3 |
Unit dependent |
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REV.R |
ENBL/DSBL |
REVERSE ROTATION ENABLE |
Default: Enable |
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BCST |
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BROADCAST CONFIGURATION |
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T.D.BC |
ON/OFF |
CCN TIME/DATE BROADCAST |
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ENTER |
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OAT.B |
ON/OFF |
CCN OAT BROADCAST |
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G.S.BC |
ON/OFF |
GLOBAL SCHEDULE BROADCAST |
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BC.AK |
ON/OFF |
CCN BROADCAST ACK’ER |
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10
Table 11 — Time Clock Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
DISPLAY |
SUB-ITEM |
DISPLAY |
ITEM |
COMMENT |
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ENTRY |
EXPANSION |
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TIME |
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TIME OF DAY |
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HH.MM |
XX.XX |
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HOUR AND MINUTE |
Military (00:00 – 23:59) |
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ENTER |
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DATE |
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MONTH,DATE,DAY AND YEAR |
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MNTH |
XX |
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MONTH OF YEAR |
1-12 (1 = January, 2 = February, etc) |
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ENTER |
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DOM |
XX |
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DAY OF MONTH |
Range: 01-31 |
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DAY |
X |
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DAY OF WEEK |
1-7 (1 = Monday, 2 = Tuesday, etc) |
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YEAR |
XXXX |
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YEAR OF CENTURY |
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DST |
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DAYLIGHT SAVINGS TIME |
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STR.M |
XX |
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MONTH |
Default: 4, Range 1 – 12 |
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ENTER |
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STR.W |
X |
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WEEK |
Default: 1, Range 1 – 5 |
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STR.D |
X |
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DAY |
Default: 7, Range 1 – 7 |
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MIN.A |
XX |
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MINUTES TO ADD |
Default: 60, Range 0 – 99 |
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STP.M |
XX |
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MONTH |
Default: 10, Range 1 – 12 |
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STP.W |
XX |
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WEEK |
Default: 5, Range 1 – 5 |
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STP.D |
XX |
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DAY |
Default: 7, Range 1 – 7 |
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MIN.S |
XX |
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MINUTES TO SUBTRACT |
Default: 60, Range 0 – 99 |
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HOL.L |
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LOCAL HOLIDAY SCHEDULES |
HD.01 through HD.30 |
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MON |
XX |
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HOLIDAY START MONTH |
Range 0 – 12 |
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ENTER |
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DAY |
XX |
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START DAY |
Range 0 – 31 |
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LEN |
XX |
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DURATION (DAYS) |
Range 0 - 99 |
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SCH.N |
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XX |
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SCHEDULE NUMBER |
Default: 1, Range 1 – 99 |
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SCH.L |
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LOCAL OCCUPANCY SCHEDULE |
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PER.1 |
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OCCUPANCY PERIOD 1* |
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ENTER |
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OCC.1 |
XX:XX |
PERIOD OCCUPIED TIME |
Military (00:00 – 23:59) |
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ENTER |
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UNC.1 |
XX.XX |
PERIOD UNOCCUPIED TIME |
Military (00:00 – 23:59) |
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MON.1 |
YES/NO |
MONDAY IN PERIOD |
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TUE.1 |
YES/NO |
TUESDAY IN PERIOD |
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WED.1 |
YES/NO |
WEDNESDAY IN PERIOD |
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THU.1 |
YES/NO |
THURSDAY IN PERIOD |
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FRI.1 |
YES/NO |
FRIDAY IN PERIOD |
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SAT.1 |
YES/NO |
SATURDAY IN PERIOD |
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SUN.1 |
YES/NO |
SUNDAY IN PERIOD |
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HOL.1 |
YES/NO |
HOLIDAY IN PERIOD |
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OVR |
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SCHEDULE OVERRIDE |
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OVR.T |
X |
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TIMED OVERRIDE HOURS |
Default: 0, Range 0-4 hours |
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ENTER |
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OVR.L |
X |
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OVERRIDE TIME LIMIT |
Default: 0, Range 0-4 hours |
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T.OVR |
YES/NO |
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TIMED OVERRIDE |
User Entry |
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* Repeats for Occupancy Periods 2 through 8.
11
Table 12 — Operating Mode and Sub-Mode Directory
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SUB-MODE |
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KEYPAD |
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ITEM |
DISPLAY |
ITEM |
COMMENT |
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ENTRY |
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EXPANSION |
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MODE |
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MODES CONTROLLING UNIT |
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MD01 |
ON/OFF |
CSM CONTROLLING CHILLER |
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ENTER |
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MD03 |
ON/OFF |
MASTER/SLAVE CONTROL |
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MD05 |
ON/OFF |
RAMP LOAD LIMITED |
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MD06 |
ON/OFF |
TIMED OVERRIDE IN EFFECT |
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MD07 |
ON/OFF |
LOW COOLER SUCTION TEMPA |
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MD09 |
ON/OFF |
SLOW CHANGE OVERRIDE |
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MD10 |
ON/OFF |
MINIMUM OFF TIME ACTIVE |
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MD13 |
ON/OFF |
DUAL SETPOINT |
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MD14 |
ON/OFF |
TEMPERATURE RESET |
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MD15 |
ON/OFF |
DEMAND LIMITED |
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MD16 |
ON/OFF |
COOLER FREEZE PROTECTION |
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MD17 |
ON/OFF |
LOW TEMPERATURE COOLING |
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MD18 |
ON/OFF |
HIGH TEMPERATURE COOLING |
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MD19 |
ON/OFF |
MAKING ICE |
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MD20 |
ON/OFF |
STORING ICE |
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MD21 |
ON/OFF |
HIGH SCT CIRCUIT A |
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MD23 |
ON/OFF |
MINIMUM COMP ON TIME |
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MD24 |
ON/OFF |
PUMP OFF DELAY TIME |
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LEGEND |
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CSM |
— |
Chillervisor System Manager |
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SCT |
— |
Saturated Condensing Temperature |
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WSM |
— |
Water System Manager |
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Table 13 — Alarms Mode and Sub-Mode Directory
SUB-MODE |
KEYPAD |
ITEM |
ITEM |
COMMENT |
|||
ENTRY |
EXPANSION |
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CRNT |
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|
AXXX OR TXXX |
CURRENTLY ACTIVE ALARMS |
Alarms are shown as AXXX. |
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ENTER |
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|||||
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Alerts are shown as TXXX. |
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RCRN |
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YES/NO |
RESET ALL CURRENT ALARMS |
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||
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ENTER |
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HIST |
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AXXX OR TXXX |
ALARM HISTORY |
Alarms are shown as AXXX. |
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ENTER |
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Alerts are shown as TXXX. |
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12
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Table 14 — Operating Modes |
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MODE |
ITEM EXPANSION |
DESCRIPTION |
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NO. |
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01 |
CSM CONTROLLING CHILLER |
Chillervisor System Manager (CSM) is controlling the chiller. |
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03 |
MASTER/SLAVE CONTROL |
Dual Chiller control is enabled. |
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RAMP LOAD LIMITED |
Ramp load (pull-down) limiting in effect. In this mode, the rate at which leaving fluid temperature |
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05 |
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is dropped is limited to a predetermined value to prevent compressor overloading. See Cooling |
|
|
Ramp Loading (Configuration SLCT CRMP). The pull-down limit can be modified, if |
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|
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desired, to any rate from 0.2° F to 2° F (0.1° to 1° C)/minute. |
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06 |
TIMED OVERRIDE IN EFFECT |
Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed |
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schedule, forcing unit to Occupied mode. Override can be implemented with unit under |
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Local (Enable) or CCN (Carrier Comfort Network®) control. Override expires after each use. |
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LOW COOLER SUCTION TEMPA |
Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Sat- |
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urated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If |
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the saturated suction temperature is less than the Brine Freeze Point (Set Points FRZ |
|
07 |
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BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F |
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(7.8° C) for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the satu- |
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rated suction temperature is less than the Brine Freeze Point minus 14° F (7.8° C), for |
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90 seconds, a stage of capacity will be removed from the circuit. The control will continue to |
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decrease capacity as long as either condition exists. |
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09 |
SLOW CHANGE OVERRIDE |
Slow change override is in effect. The leaving fluid temperature is close to and moving |
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towards the control point. |
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10 |
MINIMUM OFF TIME ACTIVE |
Chiller is being held off by Minutes Off Time (Configuration OPT2 DELY). |
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DUAL SETPOINT |
Dual Set Point mode is in effect. Chiller controls to Cooling Set Point 1 (Set Points COOL |
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13 |
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CSP.1) during occupied periods and Cooling Set Point 2 (Set Points COOL CSP.2) |
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during unoccupied periods. |
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TEMPERATURE RESET |
Temperature reset is in effect. In this mode, chiller is using temperature reset to adjust leav- |
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14 |
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ing fluid set point upward and is currently controlling to the modified set point. The set point |
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can be modified based on return fluid, outdoor-air-temperature, space temperature, or 4 to |
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20 mA signal. |
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DEMAND LIMITED |
Demand limit is in effect. This indicates that the capacity of the chiller is being limited by |
|
15 |
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demand limit control option. Because of this limitation, the chiller may not be able to pro- |
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duce the desired leaving fluid temperature. Demand limit can be controlled by switch inputs |
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or a 4 to 20 mA signal. |
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16 |
COOLER FREEZE PROTECTION |
Cooler fluid temperatures are approaching the Freeze point (see Alarms and Alerts section |
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for definition). The chiller will be shut down when either fluid temperature falls below the |
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Freeze point. |
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17 |
LOW TEMPERATURE COOLING |
Chiller is in Cooling mode and the rate of change of the leaving fluid is negative and |
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decreasing faster than -0.5° F per minute. Error between leaving fluid and control point |
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exceeds fixed amount. Control will automatically unload the chiller if necessary. |
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18 |
HIGH TEMPERATURE COOLING |
Chiller is in Cooling mode and the rate of change of the leaving fluid is positive and increasing. |
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Error between leaving fluid and control point exceeds fixed amount. Control will automatically |
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load the chiller if necessary to better match the increasing load. |
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19 |
MAKING ICE |
Chiller is in an unoccupied mode and is using Cooling Set Point 3 (Set Points COOL |
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CSP.3) to make ice. The ice done input to the Energy Management Module (EMM) is open. |
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20 |
STORING ICE |
Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2 (Set Points COOL |
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CSP.2). The ice done input to the Energy Management Module (EMM) is closed. |
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|
HIGH SCT CIRCUIT A |
Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than |
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21 |
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the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity |
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may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing con- |
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densing temperature. |
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23 |
MINIMUM COMP ON TIME |
Cooling load may be satisfied, however control continues to operate compressor to ensure |
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proper oil return. May be an indication of oversized application, low fluid flow rate or low loop |
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volume. |
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PUMP OFF DELAY TIME |
Cooling load is satisfied, however cooler pump continues to run for the number of minutes set |
|
24 |
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by the configuration variable Cooler Pump Shutdown Delay (Configuration OPT1 |
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PM.DY). |
13
CONTROLS
General — The 30MP liquid scroll chillers contain the ComfortLink™ electronic control system that controls and monitors all operations of the chiller.
The control system is composed of several components as listed in the sections below. See Fig. 3 for a typical control box drawing. See Fig. 4 and 5 for control schematics.
Main Base Board (MBB) — See Fig. 6. The MBB is the heart of the ComfortLink control system. It contains the major portion of operating software and controls the operation of the machine. The MBB continuously monitors input/output channel information received from its inputs and from all other modules. The MBB receives inputs from the discharge and suction pressure transducers and thermistors. See Table 15. The MBB also receives the feedback inputs from each compressor current sensor board and other status switches. See Table 16. The MBB also controls several outputs. Relay outputs controlled by the MBB are shown in Table 17. Information is transmitted between modules via a 3-wire communication bus or LEN (Local Equipment Network). The CCN (Carrier Comfort Network) bus is also supported. Connections to both LEN and CCN buses are made at the LVT (low voltage terminal).
Energy Management Module (EMM) — The EMM module is available as a factory-installed option or as a fieldinstalled accessory. The EMM module receives 4 to 20 mA inputs for the leaving fluid temperature reset, cooling set point and demand limit functions. The EMM module also receives the switch inputs for the field-installed 2-stage demand limit and ice done functions. The EMM module communicates the status of all inputs with the MBB, and the MBB adjusts the control point, capacity limit, and other functions according to the inputs received.
Current Sensor Board (CSB) — The CSB is used to monitor the status of the compressors by measuring current and providing an analog input to the main base board (MBB).
Enable/Off/Remote Contact Switch — The Enable/ Off/Remote Contact switch is a 3-position switch used to control the chiller. When switched to the Enable position the chiller is under its own control. Move the switch to the Off position to shut the chiller down. Move the switch to the Remote Contact position and a field-installed dry contact can be used to start the chiller. The contacts must be capable of handling a 24 vac, 50-mA load. In the Enable and Remote Contact (dry contacts closed) positions, the chiller is allowed to operate and respond to the scheduling configuration, CCN configuration and set point data. See Fig. 7.
Emergency On/Off Switch — The Emergency On/Off switch should only be used when it is required to shut the chiller off immediately. Power to the MBB, EMM, and marquee display is interrupted when this switch is off and all outputs from these modules will be turned off. See Fig. 7.
Board Addresses — The main base board (MBB) has a 3-position instance jumper that must be set to ‘1.’ The EMM board has 4-position DIP switches. All switches are set to ‘On’ for all boards except the AUX2 board. The AUX2 board DIP switch settings are shown on the wiring schematic.
Control Module Communication
RED LED — Proper operation of the control boards can be visually checked by looking at the red status LEDs (light-emitting diodes). When operating correctly, the red status LEDs should be blinking in unison at a rate of once every 2 seconds. If the red LEDs are not blinking in unison, verify that correct power is being supplied to all modules. Be sure that
the main base board (MBB) is supplied with the current software. If necessary, reload current software. If the problem still persists, replace the MBB. A red LED that is lit continuously or blinking at a rate of once per second or faster indicates that the board should be replaced.
GREEN LED — The MBB has one green LED. The Local Equipment Network (LEN) LED should always be blinking whenever power is on. All other boards have a LEN LED which should be blinking whenever power is on. Check LEN connections for potential communication errors at the board J3 and/or J4 connectors. Communication between modules is accomplished by a 3-wire sensor bus. These 3 wires run in parallel from module to module. The J4 connector on the MBB provides both power and communication directly to the marquee display only.
YELLOW LED — The MBB has one yellow LED. The Carrier Comfort Network (CCN) LED will blink during times of network communication.
Carrier Comfort Network® (CCN) Interface —
The 30MP chiller units can be connected to the CCN if desired. The communication bus wiring is a shielded, 3-conductor cable with drain wire and is supplied and installed in the field. See Table 18. The system elements are connected to the communication bus in a daisy chain arrangement. The positive pin of each system element communication connector must be wired to the positive pins of the system elements on either side of it. This is also required for the negative and signal ground pins of each system element. Wiring connections for CCN should be made at LVT. Consult the CCN Contractor’s Manual for further information.
NOTE: Conductors and drain wire must be 20 AWG (American Wire Gage) minimum stranded, tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, or polyethylene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of –20 C to 60 C is required. Wire manufactured by Alpha (2413 or 5463), American (A22503), Belden (8772), or Columbia (02525) meets the above mentioned requirements.
It is important when connecting to a CCN communication bus that a color coding scheme be used for the entire network to simplify the installation. It is recommended that red be used for the signal positive, black for the signal negative, and white for the signal ground. Use a similar scheme for cables containing different colored wires.
At each system element, the shields of its communication bus cables must be tied together. If the communication bus is entirely within one building, the resulting continuous shield must be connected to a ground at one point only. If the communication bus cable exits from one building and enters another, the shields must be connected to grounds at the lightning suppressor in each building where the cable enters or exits the building (one point per building only). To connect the unit to the network:
1.Turn off power to the control box.
2.Cut the CCN wire and strip the ends of the red (+), white (ground), and black (–) conductors. (Substitute appropriate colors for different colored cables.)
3.Connect the red wire to (+) terminal on LVT of the plug, the white wire to COM terminal, and the black wire to the
(–) terminal.
4.The RJ14 CCN connector on LVT can also be used, but is only intended for temporary connection (for example, a laptop computer running Service Tool).
14
|
LEGEND FOR FIG. 3-5 |
ALMR |
— Alarm Relay |
AUX |
— Auxilliary |
C |
— Contactor, Compressor |
CB |
— Circuit Breaker |
CCB |
— Compressor Circuit Breaker |
CH |
— Crankcase Heater |
CCH |
— Crankcase Heater Relay |
COMP |
— Compressor |
CR |
— Control Relay |
CSB |
— Current Sensor Board |
CWFS |
— Chilled Water Flow Switch |
CWP |
— Chilled Water Pump |
DGS |
— Digital Scroll Compressor |
DPT |
— Discharge Pressure Transducer |
DTT |
— Discharge Temperature Thermistor |
DUS |
— Digital Unloader Solenoid |
EMM |
— Energy Management |
EWT |
— Entering Water Temperature |
FB |
— Fuse Block |
FIOP |
— factory Installed Option |
FU |
— Fuse |
GND |
— Ground |
HPS |
— High-Pressure Switch |
LLSV |
— Liquid Line Solenoid Valve |
LON |
— Local Operating Network |
LVT |
— Low Voltage Terminal |
LWT |
— Leaving Water Temperature |
MBB |
— Main Base Board |
MLV |
— Minimum Load Valve |
MP |
— Modular Motor Protection |
NEC |
— National Electrical Code |
OAT |
— Outdoor-Air Thermistor |
PL |
— Plug |
RLY |
— Relay |
SPT |
— Suction Pressure Transducer |
SW |
— Switch |
TB |
— Terminal Block |
TRAN |
— Transformer |
UPC |
— Unitary Protocol Converter |
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Terminal Block |
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Terminal (Unmarked) |
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Terminal (Marked) |
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Splice |
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Factory Wiring |
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Field Wiring |
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Accessory or Option Wiring |
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To indicate common potential only; not to represent wiring. |
15
EQUIP |
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UPC LON |
UPC |
GND |
TB3 |
OPTION |
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DISCONNECT OPTION CB1A/TB1A
L1 |
L2 |
L3 |
2 |
4 |
6 |
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TRAN1 |
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25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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LVT |
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CCB-1 |
CCB-2 |
CCB-3 |
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EMM |
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CSB-A1 |
CSB-A2 |
CSB-A3 |
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CCH |
CA1 |
CA2 |
CA3 |
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MBB |
FB1 |
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LOCATED OVER EMM
CB1 |
CB2 |
CB3 |
REMOTE |
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CONTROL |
OFF |
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SW1 |
OFF |
SW2 |
ENABLE |
ON |
Fig. 3 — Typical Control Box — 30MP015-045 Units
a30-4963
16
17
OPTIONAL |
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STANDARD |
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TERMINAL |
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DISCONNECT |
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BLOCK |
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CB1A |
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TB1A |
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L1 |
2 |
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TO |
L1 |
11 |
21 |
BLK |
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BLK |
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FUSEDTO DISCONNECT NECPER |
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NECPER |
DISCONNECTFUSED |
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BLK |
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22 |
YEL |
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L2 |
4 |
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L2 |
12 |
YEL |
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YEL |
L3 |
6 |
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L3 |
13 |
23 |
BLU |
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BLU |
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BLU |
NEUTRAL |
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11 |
21 |
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WHT |
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380V UNITS ONLY |
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EQUIP GND |
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FU1 |
BLK |
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BLK |
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FU2 |
YEL |
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CONNECT FOR |
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YEL |
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APPROPRIATE |
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PRIMARY VOLTAGE |
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SEE TABLE 1 |
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TRAN1 |
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PRIMARY |
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H1 |
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H2 |
H3 |
H4 |
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SECONDARY 24V |
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RED XF FU3 |
X3 |
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X2 |
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X1 |
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GRN/YEL |
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380V ONLY
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TB3 |
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BRN |
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RED |
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1 |
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A1 |
SW2 |
BRN |
2 |
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B1 |
C1 |
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3 |
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FIOP/ACCESSORY |
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RED |
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3 |
3 |
J1 |
3 |
3 |
3 |
J1 |
3 |
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3 |
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CB3 |
2 |
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MBB |
2 |
2 |
2 |
EMM |
2 |
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3.2 AMPS |
2 |
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BRN |
BRN |
2 |
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1 |
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J2 |
1 |
1 |
1 |
J2 |
1 |
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VIO |
VIO |
1 |
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RED |
1 |
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VIO |
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DGS FIOP |
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BRN |
2 |
12 |
AUX2 |
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1 |
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TABLE 1 |
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VIO |
11 |
J1 |
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TERMINAL |
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4965-a30 |
BRN |
2 |
GND |
UPC |
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VOLTAGE |
SERIES |
CONNECTIONS |
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208-3-60 |
500 |
H3 & H4 |
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FOR PRIMARY SIDE |
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UPC FIOP |
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575-3-60 |
100 |
H1 & H5 |
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24VAC |
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380-3-60 |
200 |
H1 & H2 |
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230-3-60 |
500 |
H2 & H4 |
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VIO |
1 |
HOT |
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460-3-60 |
600 |
H1 & H4 |
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015,020,040: 380V,460V,575V ONLY |
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030,045: 460V,575V ONLY |
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CCB-1 |
CSB-A1 |
CA1 |
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1 |
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BLK |
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11 |
21 |
BLK |
11 |
21 |
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BLK |
T1 |
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YEL |
12 |
22 |
YEL |
12 |
22 |
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2 |
T2 |
COMP A1 |
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YEL |
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BLU |
13 |
23 |
BLU |
13 |
23 |
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3 |
T3 |
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BLU |
GRN/YEL |
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YEL |
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YEL |
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BLK |
CCB-2 |
BLU BLK |
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CA2 |
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CSB-A2 |
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1 |
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BLK |
11 |
21 |
21 |
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T1 |
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BLK |
11 |
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BLK |
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2 |
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YEL |
12 |
22 |
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12 |
22 |
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T2 |
COMP A2 |
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YEL |
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YEL |
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3 |
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BLU |
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T3 |
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13 |
23 |
BLU |
13 |
23 |
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BLU |
GRN/YEL |
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015,020,040: 208/230V ONLY |
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030,045: 202/230V,380V ONLY |
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CCB-3 |
CSB-A3 |
CA3 |
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1 |
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BLK |
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11 |
21 |
BLK |
11 |
21 |
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BLK |
T1 |
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YEL |
12 |
22 |
YEL |
12 |
22 |
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2 |
T2 |
COMP A3 |
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YEL |
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3 |
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(040,045 ONLY) |
BLU |
13 |
23 |
BLU |
13 |
23 |
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T3 |
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BLU |
GRN/YEL |
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(040,045 ONLY) |
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(040,045 ONLY) |
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BLK |
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YEL |
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FUSE |
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UNIT VOLTAGE |
TRAN |
REPLACE |
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NUMBER |
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SIZE |
WITH |
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208/230-3-60 |
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FNQ-R-3 |
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FU1 & FU2 |
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380-3-60 |
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200VA |
FNQ-R-2 |
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460-3-60 |
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FNQ-R-1.5 |
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575-3-60 |
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250VA FNQ-R-1.5 |
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FU3 (24V) |
380-3-60,460-3-60,575-3-60 |
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FNQ-R-10 |
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208/230-3-60 |
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FU4 & FU5 |
380-3-60,460-3-60,575-3-60 |
NONE |
FNQ-R-3 |
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208/230-3-60 |
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FB1 |
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CCH |
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CH-A1 |
BLK |
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FU4 |
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BLK |
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L1 |
T1 |
BLK |
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BLK |
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PL11-2 |
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YEL |
FU5 |
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YEL |
WHT |
L2 |
T2 |
YEL |
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BLK |
(MPA ONLY) |
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(MPA ONLY) |
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PL12-1 |
CH-A2 |
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BLK |
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BLK |
NOT USED ON |
YEL |
PL12-2 |
BLK |
380V UNITS |
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PL13-1 |
CH-A3 |
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BLK |
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WHT |
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BLK |
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380V |
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PL13-2 |
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UNITS ONLY |
YEL |
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BLK |
(040,045 ONLY)
NOTES:
1.FACTORY WIRING IS IN ACCORDANCE WITHUL 1995STANDARDS. ANY FIELD MODIFICATIONS ORADDITIONSMUST BE IN COMPLIANCE WITH ALL APPLICABLE CODES.
C MIN WIRE FOR FIELD POWER SUPPLY.
3. ALL FIELD INTERLOCK CONTACTSMUST HAVE AMINRATING OF 2 AMPS @ 24VAC SEALED. SEE FIELD INTERLOCK WIRING.
4.COMPRESSOR AND FAN MOTORS ARE THERMALLYPROTECTED-- THREE PHASE MOTORS PROTECTEDAGAINST PRIMARYSINGLE PHASE CONDITIONS.
5. TERMINALS 14 & 15 OF LVT ARE FOR FIELD CONNECTION OF REMOTE ON-OFF. THE CONTACT MUST BERATEDFOR DRY CIRCUIT APPLICATION CAPABLE OF HANDLINGA5VDC
1 MA TO 20 MA LOAD.
6.FOR 500 SERIES UNIT OPERATIONAT 208-3-60VLINE VOLTAGE,
TRAN1 PRIMARY CONNECTIONS MUST BE MOVEDTOTERMINALS H3 & H4.
7.MAX LOAD: 5VA SEALED, 10VAINRUSH
8.MP-A1 NOT USED IN THE FOLLOWINGUNITS: 015,020: ALL UNITS
030-045: 460V UNITS WITHOUT DIGITAL SCROLL
9.MP-A2 NOT USED IN THE FOLLOWINGUNITS: 015,020: ALL UNITS
030-045: 460V UNITS
10.MP-A3 NOT USED IN THE FOLLOWINGUNITS: 040,045: 460V UNITS
11.JUMPER PLUG REQUIRED WHEN MPNOT USED
12.IF CHILLED WATER PUMP INTERLOCK ISUSED, REMOVE JUMPER FROM TERMINAL 16 TO17AND
WIRE INTERLOCK CONTACT ACROSS TERMINALS16&17.
Fig. 4 — Typical Power Wiring Schematic — 30MP015-045 Units
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TRAN1 |
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CB2 |
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A2 |
SW2 |
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3.2 AMPS |
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RED |
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XF |
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FU3 |
X1 |
SECONDARY 24V |
X2 |
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BRN |
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1 |
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C2 |
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GRN/YEL |
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ORN |
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MBB |
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B2 |
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ORN |
CB1 |
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J10A |
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1 |
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3.2 AMPS |
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1 |
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2 |
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PNK |
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LVT |
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2 |
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PNK |
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J12 |
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3 ORN |
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RLY 11 |
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GRA |
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ALMR |
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3 |
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1 |
25 |
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4 |
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ALARM RELAY |
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5 |
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SEE NOTE 7 |
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TB3 |
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5 |
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6 ORN |
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PNK |
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CR |
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1 |
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BRN |
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X2 |
TRAN1 |
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RLY 9 |
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6 |
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2 |
24 |
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7 |
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CWP RELAY |
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7 |
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2 |
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BRN |
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CWFS-3 |
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SEE NOTE 7 |
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8 |
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8 |
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J12 |
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9 |
ORN |
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RLY 10 |
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BLU |
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6 |
20 |
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CR |
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3 |
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BRN |
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LLSV-A |
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9 |
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J10B |
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1 |
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CONDENSER FAN/PUMP RELAY |
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10 |
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2 |
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SEE NOTE 7 |
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RLY 5 |
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ORN |
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11 |
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7 |
19 |
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3 |
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CONDENSER |
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WATER |
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4 |
ORN |
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J11 |
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VALVE |
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RLY 6 |
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PNK |
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(MPB ONLY) |
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13 |
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1 |
18 |
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5 |
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14 |
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6 |
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7 |
ORN |
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RLY 7 |
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16 |
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RED |
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RED |
GRA |
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BRN |
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BRN |
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3 |
TB3 |
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8 |
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LLSV-A |
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BRN |
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MLV-A |
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17 |
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9 |
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(MPA AND BRINE ONLY) |
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18 |
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10 |
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RLY 8 |
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19 |
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|
BLU |
|
|
|
|
|
|
|
|
|
|
|
|
BLU |
C1 |
CCH |
C2 |
|
|
|
|
BRN |
|
C2 |
CA3 |
|
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11 |
|
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HPS-A |
|
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|
|
(MPA ONLY) |
|
|
|
|
BRN |
|
|
MLV-A |
|
|
|
|
|
|
|
|
|||
|
|
|
20 |
|
BLK |
|
BLK |
|
BLK |
PNK |
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||||||
|
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|
12 |
|
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|
|
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|
|
PL1-1 |
|
|
MP-A1 |
|
|
PL1-2 |
|
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||
RLY 1 |
|
|
21 |
|
|
|
|
ORN |
|
|
|
|
|
|
VIO |
M1 |
|
M2 |
VIO |
ORN |
C1 |
CA1 |
C2 |
|
|
|
|
BRN |
|
|
|
PL1-4 |
|
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|
13 |
|
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|
SEE NOTE 11 |
|
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VIO |
|
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|
BRN |
|
|
PL2-4 |
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|||
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|
22 |
|
|
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|||
|
|
|
14 BLK |
|
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|
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|
|
PL2-1 |
|
|
MP-A2 |
|
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PL2-2 |
|
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|
|
RLY 2 |
|
|
23 |
|
|
|
|
GRA |
|
|
|
|
|
|
VIO |
M1 |
|
M2 |
VIO |
GRA |
C1 |
CA2 |
C2 |
|
|
|
|
BRN |
|
|
|
PL2-4 |
|
|
|
|
|
|
|
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|
|
|
|
15 |
|
|
|
|
|
|
|
|
SEE NOTE 11 |
|
|
VIO |
|
|
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|
|
|
|
|
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|
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BRN |
|
|
PL3-4 |
|
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|
|
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|||
|
|
|
24 |
|
|
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|
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|
|
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|||
|
|
|
16 |
|
|
|
|
|
|
|
|
|
|
PL3-1 |
|
|
MP-A3 |
|
|
PL3-2 |
|
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|
|
|
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|
|
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|
|
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|
|
|
|
RLY 3 |
|
|
25 |
|
|
|
|
VIO |
|
|
|
|
|
|
VIO |
M1 |
|
M2 |
VIO |
VIO |
C1 |
CA3 |
C2 |
|
|
|
|
BRN |
|
C2 |
CCH |
|
|
|
|
|
|
|
|
||
|
|
|
17 |
|
|
|
|
|
|
|
|
SEE NOTE 11 |
|
|
VIO |
|
|
|
|
(040,045 ONLY) |
|
|
|
|
BRN |
|
|
PL3-4 |
|
|
|
|
|
|
|
|
|||||
|
|
|
26 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
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|
||||||
|
|
|
18 |
|
|
|
|
GRA |
|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
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|
|
|
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|
|
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|
|
|
|
|
|
RLY 4 |
|
|
27 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
GRA |
GRA |
|
|
|
BRN |
|
|
|
BRN |
|
|
|
LLSV-A |
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
MLV-A |
|
|
|
|
|
BRN |
|
C2 |
CCH |
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
BLK |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
MLV FIOP |
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
PNK |
|
|
|
|
|
|
|
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|
|
|
|
|
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|
|
|
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1 |
|
3 |
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
PNK |
BRN |
|
CWFS |
|
BLU |
BRN |
|
|
BRN |
|
|
2 |
TB3 |
|
|
|
|
|
|
|
|
|
LVT |
|
|
|
6 |
6 |
|
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|
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|
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|
|
|
|
|
|
|
|
J11 |
|
|
|
5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SEE NOTE 8 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
PL1-3 |
PL1-4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
17 |
|
2 |
|
|
|
4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
|
|
|
|||
|
|
|
|
4 |
|
|
|
|
|
|
|
|
|
|
|
|
PNK |
RED |
T2 |
MP-A1 |
T1 |
BRN |
|
|
|
BRN |
|
C2 |
CA1 |
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
J6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||||
|
|
|
|
|
|
3 |
3 |
|
|
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|
|
|
|
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|
|
|
|
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|
|
|
|
|
|
|
|
|
2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
3 |
|
|
RED |
2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SEE NOTE 9 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
PL2-3 |
PL2-4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
CWPI |
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
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|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
PNK |
RED |
T2 |
MP-A2 |
T1 |
BRN |
|
|
|
BRN |
|
C2 |
CA1 |
|
|
|
|
|
|
|
|
|||
(SEE |
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
||||||||||
NOTE |
|
4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
BRN |
|
C2 |
CA2 |
|
|
|
|
|
|
|
|
|
12) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SEE NOTE 10 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
PL3-3 |
PL3-4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
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|
|
|
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|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
4 |
CWFS |
2 |
10 |
|
|
|
|
|
|
|
|
1 |
|
|
|
|
PNK |
RED |
T2 |
MP-A3 |
T1 |
BRN |
|
|
|
BRN |
|
C2 |
CA2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
MARQUEE |
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||||||||
16 |
|
5 |
BLK |
|
WHT |
10 |
|
|
1 |
RED |
|
RED |
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||||
|
|
|
|
|
2 |
|
2 |
DISPLAY |
|
|
|
|
|
|
|
|
|
|
BRN |
|
C2 |
CA3 |
|
|
|
|
|
|
|
|
|||||||||||
|
|
|
|
|
|
|
|
|
|
2 |
WHT |
|
WHT |
|
2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
3 |
|
3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
9 |
|
|
J4 |
3 |
BLK |
|
BLK |
3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
15 |
|
6 |
VIO |
|
9 |
|
|
|
4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
4 |
4 |
|
|
|
4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
5 |
5 |
BRN |
|
RED |
5 |
5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
8 |
|
|
|
6 |
|
6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
14 |
|
7 |
RED |
|
|
8 |
|
|
6 |
RED |
|
BRN |
6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|||
|
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|
|
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|
|
|
|
|
|
|
|
||||||||
REMOTE |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ON-OFF |
|
|
|
A1 |
SW1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SWITCH |
|
|
|
ENABLE |
7 |
|
|
|
1 |
1 |
RED |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(SEE |
|
8 |
|
|
RED |
7 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
OFF |
|
|
|
2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
NOTE 5) |
|
|
|
B1 |
C1 |
|
|
|
J3 |
2 |
WHT |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
3 |
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
ORN |
|
|
|
|
3 |
BLK |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
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|
6 |
|
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|
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13 |
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9 |
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6 |
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4 |
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4 |
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J7 |
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12 |
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10 |
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5 |
5 |
MAIN |
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1 |
1 |
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DUAL |
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BASE |
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2 |
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SETPOINT |
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3 |
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3 |
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BOARD |
4 |
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11 |
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BLU |
4 |
4 |
RED |
2 |
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6 |
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5 |
CSB |
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3 |
- |
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CNPI |
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5 |
ORN |
3 |
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5 |
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A2 |
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2 |
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3 |
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J9 |
6 |
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4 |
G |
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7 |
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DUS |
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12 |
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BLU |
3 |
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6 |
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BRN |
1 |
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1 |
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J9 |
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- |
7 |
VIO |
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7 |
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7 |
8 |
RED |
2 |
CSB |
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BLK |
3 |
3 |
- |
|
J2 CH1 |
8 |
8 |
BRN |
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CNFS |
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8 |
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ORN |
3 |
A3 (040,045 ONLY) |
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WHT |
2 |
2 |
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2 |
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9 |
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1 |
G |
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DGS |
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11 |
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13 |
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VIO |
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2 |
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9 |
10 |
BRN |
1 |
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RED |
1 |
+ |
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1 |
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DTT |
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10 |
RED |
2 |
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FIOP |
CH11 |
1 |
RED |
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11 |
CSB |
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J6 - |
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2 |
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1 |
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11 |
ORN |
3 |
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2 |
BLK |
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14 |
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1 |
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12 |
A1 |
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12 |
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BRN |
1 |
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ON |
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OFF |
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1 |
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CONDENSER EWT |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
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1 |
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DARK = SWITCH LOCATION |
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ACCESSORY |
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2 |
2 |
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3 |
3 |
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CONDENSER LWT |
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ACCESSORY |
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||
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LVT |
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4 |
4 |
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LVT |
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SEN |
T-55 |
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J12 |
T55 |
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ACCSY |
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LVT |
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LEN |
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5 |
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5 |
BLU |
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3 |
23 |
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J10 |
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||
|
J13 |
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10 |
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1 |
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||||||
|
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BRN |
10 |
|
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6 |
|
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4 |
|
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EMM |
|
1 |
GRA |
17 |
1 |
|
|
||||
|
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6 |
VIO |
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4 |
22 |
|
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|
||||||||||
CCN |
|
1 |
BLK |
|
9 |
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4 |
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2 |
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|
|||||||||||||
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|
RED |
9 |
|
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1 |
|
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3 |
|
|
|
|
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2 |
GRA |
16 |
2 |
|
|
||||||||||||
|
|
8 |
|
|
7 |
RED |
|
|
|
|
5 |
21 |
|
|
|
|
|
|
BLK |
|
J3 |
|
3 |
ICE DONE |
|||||||||||||||||
|
|
2 |
WHT |
|
|
8 |
|
|
|
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|
|
|
|
|
2 |
3 |
|
|
|
|
3 |
RED |
15 |
3 |
||||||||||||
|
(+) |
3 |
RED |
|
|
7 |
|
|
|
2 |
|
|
|
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|
|
|
|
|
|
|
|
|
WHT |
2 |
|
|
|
|
4 |
|
|
|||||||||
RED |
|
BLK |
7 |
|
|
8 |
|
|
|
|
|
|
|
|
OAT ACCESSORY OR |
|
|
1 |
|
|
|
|
4 |
RED |
14 |
4 |
|
|
|||||||||||||
|
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|
6 |
|
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|
|
|
|
5 |
DLS STEP 1 |
||||||||||||||
WHT |
(COM) |
4 |
BRN |
|
WHT |
6 |
J5 |
|
|
3 |
|
|
RGTA |
|
|
|
|
DUAL CHILLER LWT |
|
|
RED |
|
1 |
|
|
|
|
|
|
|
5 |
BLU |
13 |
5 |
|||||||
5 |
RED |
|
5 |
|
9 |
|
|
|
ACCESSORY |
|
|
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|
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6 |
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||||||
|
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RED |
5 |
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4 |
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|
6 |
7 |
BLU |
12 |
6 |
|
|
|||||
BLK |
(-) |
6 |
BLK |
|
|
4 |
|
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|
10 |
|
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7 |
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11 |
|
DLS STEP 2 |
||
SHIELD |
|
|
4 |
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|
J7 |
|
|
|
||||||||||
|
7 |
WHT |
|
|
3 |
|
|
|
1 |
|
|
|
COOLER ENTERING |
|
|
|
|
|
|
|
4 |
|
|
|
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|
8 |
|
|
|
|
|||||||||
|
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BLK |
3 |
|
|
11 |
RED |
|
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|
4 |
|
|
|
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|
8 |
|
|
|
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|
|||||||||||||
|
8 |
RED |
|
2 |
|
|
2 |
|
|
FLUID TEMP |
|
|
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|
|
|
|
|
3 |
|
|
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|
|
9 |
|
|
|
|
|
|||||||||||
J1 |
|
WHT |
|
2 |
|
|
12 |
|
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|
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|
|
BLK |
|
3 |
|
J4 |
|
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9 |
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||||||
|
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1 |
J8 |
|
BLK |
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2 |
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10 |
|
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|
||||||||||||
|
|
|
RED |
1 |
3 |
|
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|
|
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|
WHT |
2 |
|
|
|
|
10 |
|
|
|
|
|
||||||||||||
|
|
|
|
|
|
13 |
RED |
|
|
COOLER LEAVING |
|
|
|
|
|
|
1 |
|
|
|
|
11 |
|
|
|
|
|
||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
FLUID TEMP |
|
|
|
|
|
|
|
RED |
1 |
|
|
|
|
|
|
|
11 |
|
|
|
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|
||||||||
|
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4 |
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12 |
|
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||||||
|
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14 |
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12 |
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BLK |
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13 |
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1 |
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13 |
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FIOP/ |
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RED |
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NET + |
LON |
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NET - |
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BRN |
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SIGNAL |
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J6 |
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PORT 1A |
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GRN |
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DPTA |
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COOLING |
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NET + |
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8 |
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NET 2 |
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23 |
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BLK |
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SHIELD |
UPC OPT |
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24 |
RED |
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25 |
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GRN |
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SPTA |
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26 |
BLK |
A |
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Fig. 5 — Typical Control Wiring Schematic — 30MP015-045 Units |
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a30-4966 |
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18
IMPORTANT: A shorted CCN bus cable will prevent some routines from running and may prevent the unit from starting. If abnormal conditions occur, unplug the connector. If conditions return to normal, check the CCN connector and cable. Run new cable if necessary. A short in one section of the bus can cause problems with all system elements on the bus.
Table 15 — Thermistor Designations
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PIN |
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THERMISTOR |
CONNECTION |
THERMISTOR INPUT |
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POINT |
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CLWT |
J8-13,14 (MBB) |
Cooler Leaving Fluid |
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CEWT |
J8-11,12 (MBB) |
Cooler Entering Fluid |
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RGTA |
J8-9,10 (MBB) |
Circuit A Return Gas |
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Temperature (accessory) |
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OAT |
J8-6,7 (MBB), |
Outdoor-Air Temperature |
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LVT 4,13 |
Sensor (accessory) or Dual |
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LWT Sensor |
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SPT |
J8-5,6 (MBB) |
Accessory Remote Space |
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LVT-3,4 |
Temperature Sensor |
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CNDE |
J8-1,2 |
Condenser Entering Water |
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Temperature Sensor |
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CNDL |
J8-3,4 |
Condenser Leaving Water |
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Temperature Sensor |
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LEGEND
LWT — Leaving Water Temperature
MBB — Main Base Board
Table 16 — Status Inputs
STATUS SWITCH |
PIN CONNECTION POINT |
Condenser Flow Switch |
LVT-11,17, J7-2, J6-2 |
Dual Set Point |
LVT-12,13, J7-3,4 |
Remote On/Off |
LVT-14,15 |
Cooler Flow Switch Interlock |
LVT-16,17, J6-2, J7-10 |
Compressor Fault Signal, A1 |
J9-11,12 |
Compressor Fault Signal, A2 |
J9-5,6 |
Compressor Fault Signal, A3 |
J9-8,9 |
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Table 17 — Output Relays |
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RELAY |
DESCRIPTION |
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NO. |
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K1 |
Energize Compressor A1 |
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K2 |
Energize Compressor A2 |
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K3 |
Energize Compressor A3 |
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K4 |
Energize Minimum Load Valve |
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K5 |
Water Valve Open |
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K6 |
Water Valve Close |
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K7 |
Liquid Line Solenoid Valve |
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K8 |
Crankcase Heater Relay (30MPA Only) |
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K9 |
Chilled Water Pump |
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K10 |
Condenser Fan/Pump |
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K11 |
Alarm Relay |
Table 18 — CCN Communication Bus Wiring
MANUFACTURER |
PART NO. |
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Regular Wiring |
Plenum Wiring |
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Alpha |
1895 |
— |
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American |
A21451 |
A48301 |
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Belden |
8205 |
884421 |
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Columbia |
D6451 |
— |
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Manhattan |
M13402 |
M64430 |
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Quabik |
6130 |
— |
Sensors — The electronic control uses 2 to 7 thermistors to sense temperatures for controlling chiller operation. See Table 15. These sensors are outlined below. Thermistors
RGTA, CNDE, CNDL, EWT, LWT, and OAT are identical in temperature versus resistance and voltage drop performance. The dual chiller thermistor (DLWT) is 5 k at 77 F (25 C) thermistor. Space temperature thermistor (SPT) is a 10 k at 77 F (25 C). See Thermistors section for temperature-resis- tance-voltage drop characteristics.
COOLER LEAVING FLUID SENSOR (LWT) — The thermistor is installed in a well in the factory-installed leaving fluid piping coming from the bottom of the brazed-plate heat exchanger.
COOLER ENTERING FLUID SENSOR (EWT) —The thermistor is installed in a well in the factory-installed entering fluid piping coming from the top of the brazed-plate heat exchanger.
CONDENSER LEAVING FLUID SENSOR (CNDL) — The thermistor is installed in a well in the factory-installed leaving fluid piping coming from the bottom of the brazed-plate heat exchanger.
COOLER ENTERING FLUID SENSOR (CNDE) —The thermistor is installed in a well in the factory-installed entering fluid piping coming from the top of the brazed-plate heat exchanger.
COMPRESSOR RETURN GAS TEMPERATURE SENSOR (RGTA) — This accessory thermistor can be installed in a well located in the suction line.
OUTDOOR-AIR TEMPERATURE SENSOR (OAT) — This sensor is an accessory that is remotely mounted and used for outdoor air temperature reset. See Table 15.
DUAL LEAVING WATER TEMPERATURE SENSOR (DLWT) — This input can be connected to the LVT. See Table 15. For dual chiller applications (parallel only are supported), connect the dual chiller leaving fluid temperature sensor (5 k thermistor, Carrier part no. HH79NZ029) to the outside air temperature input of the Master chiller. If outside air temperature is required for reset applications, connect the sensor to the Slave chiller and configure the slave chiller to broadcast the value to the Master chiller.
REMOTE SPACE TEMPERATURE SENSOR (SPT) — The sensor (part no. 33ZCT55SPT) is an accessory sensor that is remotely mounted in the controlled space and used for space temperature reset. The sensor should be installed as a wallmounted thermostat would be (in the conditioned space where it will not be subjected to either a cooling or heating source or direct exposure to sunlight, and 4 to 5 ft above the floor).
Space temperature sensor wires are to be connected to terminals in the unit main control box. The space temperature sensor includes a terminal block (SEN) and a RJ11 female connector. The RJ11 connector is used access into the Carrier Comfort Network® (CCN) at the sensor.
To connect the space temperature sensor (Fig. 8):
1.Using a 20 AWG twisted pair conductor cable rated for the application, connect 1 wire of the twisted pair to one SEN terminal and connect the other wire to the other SEN terminal located under the cover of the space temperature sensor.
2.Connect the other ends of the wires to terminals 3 and 4 on LVT located in the unit control box.
Units on the CCN can be monitored from the space at the sensor through the RJ11 connector, if desired. To wire the RJ11 connector into the CCN (Fig. 9):
IMPORTANT: The cable selected for the RJ11 connector wiring MUST be identical to the CCN communication bus wire used for the entire network. Refer to Table 18 for acceptable wiring.
1.Cut the CCN wire and strip ends of the red (+), white (ground), and black (–) conductors. (If another wire color scheme is used, strip ends of appropriate wires.)
19
RED LED - STATUS |
GREEN LED - |
YELLOW LED - |
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LEN (LOCAL EQUIPMENT NETWORK) |
CCN (CARRIER COMFORT NETWORK) |
INSTANCE JUMPER
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CEPL130346-01 |
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K11 |
K10 |
K9 |
J1 |
J2 |
K8 |
K7 |
K6 |
K5 |
STATUS |
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J4 |
J3 |
LEN |
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J10 |
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K4 |
K3 |
K2 |
K1 |
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CCN |
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J5 |
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J6 |
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J7 |
J8 |
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J9 |
Fig. 6 — Main Base Board
a30-4967
Fig. 7 — Enable/Off/Remote Contact Switch, and Emergency On/Off Switch Locations
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a30-4968 |
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T-55 SPACE |
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SENSOR |
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SPT (T10) PART NO. 33ZCT55SPT |
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6 |
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SENSOR |
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CCN+ |
5 |
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SEN |
LVT |
TO CCN |
CCN GND |
4 |
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SEN |
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COMM 1 |
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3 |
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BUS (PLUG) |
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3 |
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AT UNIT |
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4 |
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CCN- |
2 |
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1 |
Fig. 8 — Typical Space Temperature Sensor Wiring
Fig. 9 — CCN Communications Bus Wiring to Optional Space Sensor RJ11 Connector
20
2.Insert and secure the red (+) wire to terminal 5 of the space temperature sensor terminal block.
3.Insert and secure the white (ground) wire to terminal 4 of the space temperature sensor.
4.Insert and secure the black (–) wire to terminal 2 of the space temperature sensor.
5.Connect the other end of the communication bus cable to the remainder of the CCN communication bus.
Energy Management Module (Fig. 10) — This factory-installed option (FIOP) or field-installed accessory is used for the following types of temperature reset, demand limit, and/or ice features:
•4 to 20 mA leaving fluid temperature reset (requires field-supplied 4 to 20 mA generator)
•4 to 20 mA cooling set point reset (requires fieldsupplied 4 to 20 mA generator)
•Discrete inputs for 2-step demand limit (requires fieldsupplied dry contacts capable of handling a 24 vac, 50 mA load)
•4 to 20 mA demand limit (requires field-supplied 4 to 20 mA generator)
•Discrete input for Ice Done switch (requires fieldsupplied dry contacts capable of handling a 24 vac, 50 mA load)
See Demand Limit and Temperature Reset sections on pages 27 and 31 for further details.
CAUTION
Care should be taken when interfacing with other manufacturer’s control systems due to possible power supply differences, full wave bridge versus half wave rectification. The two different power supplies cannot be mixed. ComfortLink™ controls use half wave rectification. A signal isolation device should be utilized if a full wave bridge signal generating device is used.
Loss-of-Cooler Flow Protection — A proof-of- cooler flow device is factory installed in all chillers.
Condenser Flow Protection — A proof-of-condens- er flow protection accessory can be field installed in the condenser water piping of all chillers. The unit must be configured for the input to be enabled.
Thermostatic Expansion Valves (TXV) — All units are equipped from the factory with conventional TXVs. The 30MPA units and 30MPW units with medium temperature brine also have factory-installed liquid line solenoids. The liquid line solenoid valves are not intended to be a mechanical shut-off. For 30MPW units, when service is required, reclaim the refrigerant from the system.
For 30MPA units when service is required, the compressor and evaporator can be serviced by closing the factory-installed liquid line service valve and field-installed discharge line service valve. After the valves are closed, reclaim the refrigerant from the system.
The TXV is set at the factory to maintain approximately 8 to 12° F (4.4 to 6.7° C) suction superheat leaving the cooler by monitoring the proper amount of refrigerant into the cooler. All TXVs are adjustable, but should not be adjusted unless absolutely necessary.
Capacity Control — The control system cycles compressors, digital scroll modulting solenoid (if equipped), and minimum load valve solenoids (if equipped) to maintain the user-configured leaving chilled fluid temperature set point. Entering fluid temperature is used by the main base board (MBB) to determine the temperature drop across the cooler and is used in determining the optimum time to add or subtract capacity
stages. The chilled fluid temperature set point can be automatically reset by the return fluid temperature, space, or outdoor-air temperature reset features. It can also be reset from an external 4 to 20-mA signal (requires energy management module FIOP or accessory).
The capacity control algorithm runs every 30 seconds. The algorithm attempts to maintain the Control Point at the desired set point. Each time it runs, the control reads the entering and leaving fluid temperatures. The control determines the rate at which conditions are changing and calculates 2 variables based on these conditions. Next, a capacity ratio is calculated using the 2 variables to determine whether or not to make any changes to the current stages of capacity. This ratio value ranges from –100 to +100%. If the next stage of capacity is a compressor, the control starts (stops) a compressor when the ratio reaches +100% (–100%). If installed, the minimum load valve solenoid will be energized with the first stage of capacity. Minimum load valve value is a fixed 30% in the total capacity calculation. The control will also use the minimum load valve solenoid as the last stage of capacity before turning off the last compressor. A delay of 90 seconds occurs after each capacity step change. Refer to Table 19.
MINUTES LEFT FOR START — This value is displayed only in the network display tables (using Service Tool, ComfortVIEW™ or ComfortWORKS® software) and represents the amount of time to elapse before the unit will start its initialization routine. This value can be zero without the machine running in many situations. This can include being unoccupied, ENABLE/OFF/REMOTE CONTACT switch in the OFF position, CCN not allowing unit to start, Demand Limit in effect, no call for cooling due to no load, and alarm or alert conditions present. If the machine should be running and none of the above are true, a minimum off time (DELY, see below) may be in effect. The machine should start normally once the time limit has expired.
MINUTES OFF TIME (Configuration OPT2 DELY) — This user-configurable time period is used by the control to determine how long unit operation is delayed after power is applied/restored to the unit. Typically, this time period is configured when multiple machines are located on a single site. For example, this gives the user the ability to prevent all the units from restarting at once after a power failure. A value of zero for this variable does not mean that the unit should be running.
LEAD/LAG DETERMINATION — This is a configurable choice and is factory set to be automatic for all units unless the unit is equipped with minimum load, then circuit A is lead (Configuration OPT2 LLCS). The value can be changed to Circuit A or Circuit B leading as desired. Set at automatic, the control will sum the current number of logged circuit starts and one-quarter of the current operating hours for each circuit. The circuit with the lowest sum is started first. Changes to which circuit is the lead circuit and which is the lag are also made when total machine capacity is at 100% or when there is a change in the direction of capacity (increase or decrease) and each circuit’s capacity is equal.
CAPACITY CONTROL OVERRIDES — The following overrides will modify the normal operation of the routine.
Deadband Multiplier — The user configurable Deadband Multiplier (Configuration SLCT Z.GN) has a default value of 1.0. The range is from 1.0 to 4.0. When set to other than 1.0, this factor is applied to the capacity Load/Unload Factor. The larger this value is set, the longer the control will delay between adding or removing stages of capacity. Figure 11 shows how compressor starts can be reduced over time if the leaving water temperature is allowed to drift a larger amount above and below the set point. This value should be set in the range of 3.0 to 4.0 for systems with small loop volumes. Figure 12 shows the operating envelope for the compressor.
21
First Stage Override — If the current capacity stage is zero, the control will modify the routine with a 1.2 factor on adding the first stage to reduce cycling. This factor is also applied when the control is attempting to remove the last stage of capacity.
Slow Change Override — The control prevents the capacity stages from being changed when the leaving fluid temperature is close to the set point (within an adjustable deadband) and moving towards the set point.
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CEBD430351-0396-01C |
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PWR |
J1 |
J2 |
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01 |
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- |
J4 |
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J3 |
LEN |
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CEPL130351 |
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STATUS |
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TEST 1 |
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J5 |
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J7 |
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J6 |
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TEST 2 |
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RED LED - STATUS |
GREEN LED - |
ADDRESS |
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LEN (LOCAL EQUIPMENT NETWORK) |
DIP SWITCH |
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Fig. 10 — Energy Management Module
Table 19 — Part Load Data Percent Displacement, Standard Units with Minimum Load Valve
30MP UNIT SIZE |
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CONTROL |
CAPACITY STEPS |
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STEPS |
(% Displacement) |
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015 |
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1 |
18* |
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2 |
50 |
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3 |
100 |
020 |
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1 |
25* |
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2 |
50 |
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3 |
100 |
030 |
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1 |
34* |
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2 |
50 |
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3 |
100 |
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1 |
21* |
040 |
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2 |
33 |
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3 |
67 |
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4 |
100 |
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1 |
22* |
045 |
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2 |
33 |
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3 |
67 |
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4 |
100 |
*Hot gas bypass (minimum load) valve energized. |
NOTE: These capacity steps may vary due to different capacity |
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staging sequences. |
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DEADBAND EXAMPLE |
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2 STARTS |
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47 |
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8 |
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46 |
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(C) |
7 |
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45 |
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(F) |
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44 |
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LWT |
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LWT |
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6 |
43 |
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42 |
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5 |
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41 |
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0 |
200 |
400 |
600 |
800 |
1000 |
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TIME (SECONDS) |
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3 STARTS |
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STANDARD |
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LEGEND |
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DEADBAND |
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MODIFIED |
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LWT — Leaving Water Temperature |
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DEADBAND |
Fig. 11 — Deadband Multiplier
SCT (F)
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
-30 |
-20 |
-10 |
0 |
10 |
20 |
30 |
40 |
50 |
60 |
70 |
80 |
LEGEND |
SST (F) |
SCT — Saturated Condensing Temperature |
a30-4969 |
SST — Saturated Suction Temperature |
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Fig. 12 — Operating Envelope for R-410A Compressor
Ramp Loading — Ramp loading (Configuration SLCT CRMP) limits the rate of change of leaving fluid temperature. If the unit is in a Cooling mode and configured for Ramp Loading, the control makes 2 comparisons before deciding to change stages of capacity. The control calculates a temperature difference between the control point and leaving fluid temperature. If the difference is greater than 4° F (2.2° C) and the rate of change (°F or °C per minute) is more than the configured Cooling Ramp Loading value (CRMP), the control does not allow any changes to the current stage of capacity.
Low Entering Fluid Temperature Unloading — When the entering fluid temperature is below the control point, the control will attempt to remove 25% of the current stages being used. If exactly 25% cannot be removed, the control removes an amount greater than 25% but no more than necessary. The lowest stage will not be removed.
Hot Gas Bypass — If equipped, the hot gas bypass valve is energized only when one compressor is running on circuit A. If the close control feature is enabled the hot gas bypass valve
may be used as needed to obtain leaving fluid temperature close to set point.
Cooler Freeze Protection — The control will try to prevent shutting the chiller down on a Cooler Freeze Protection alarm by removing stages of capacity. If the cooler fluid selected is Water, the freeze point is 34 F (1.1 C). If the cooler fluid selected is Brine, the freeze point is the Brine Freeze Point (Set Points FRZ BR.FZ). This alarm condition (A207) only references leaving fluid temperature and NOT Brine Freeze point. If the cooler leaving fluid temperature is less than the freeze point plus 2.0° F (1.1° C), the control will immediately remove one stage of capacity. This can be repeated once every 30 seconds.
Low Saturated Suction Protection — The control will try to prevent shutting a circuit down due to low saturated suction conditions by removing stages of capacity. The circuit alert condition (T116) compares saturated suction temperature to the configured Brine Freeze Point (Set Points FRZ BR.FZ). The Brine Freeze point is a user-configurable value that must be left at 34 F (1.1 C) for 100% water systems. A lower value
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may be entered for systems with brine solutions, but this value should be set according to the freeze protection level of the brine mixture. Failure to properly set this brine freeze point value may permanently damage the brazed plate heat exchanger. The control will initiate Mode 7 (Circuit A) to indicate a circuit’s capacity is limited and that eventually the circuit may shut down.
Operation of Machine Based on Control
Method and Cooling Set Point Selection Set-
tings — Machine On/Off control is determined by the configuration of the Control Method (ConfigurationOPT2 CTRL) and Cooling Set Point Select (Configuration SLCT CLSP) variables. All units are factory configured with Cooling Set Point Select set to 0 (single set point). With the control method set to 0, simply switching the Enable/Off/Remote Contact switch to the Enable or Remote Contact position (external contacts closed) will put the chiller in an occupied state. The control mode (Run Status VIEW STAT) will be 1 (OFF LOCAL) when the switch is Off and will be 5 (ON LOCAL) when in the Enable position or Remote Contact position with external contacts closed.
Two other control methods are available for Machine On/ Off control:
OCCUPANCY SCHEDULE (Configuration OPT2CTRL = 1) — The main base board will use the operating schedules as defined under the Time Clock mode in the scrolling marquee display. These schedules are identical. The schedule number must be set to 1 for local schedule.
The schedule number can be set anywhere from 65 to 99 for operation under a CCN global schedule. The Enable/Off/ Remote Contact must be in the Enable or Remote Contact position. The control mode (Run Status VIEW STAT) will be 1 when the switch is Off. The control mode will be 3 when the Enable/Off/Remote Contact switch input is On and the time of day is during an unoccupied period. Similarly, the control mode will be 7 when the time of day is during an occupied period.
CCN SCHEDULE (Configuration OPT2 CTRL = 2) — An external CCN device such as Chillervisor System Manager controls the On/Off state of the machine. This CCN device forces the variable ‘CHIL_S_S’ between Start/Stop to control the chiller. The control mode (Run StatusVIEW STAT) will be 1 when the switch is Off. The control mode will be 2 when the Enable/Off/Remote Contact switch input is On and the CHIL_S_S variable is ‘Stop.’ Similarly, the control mode will be 6 when the CHIL_S_S variable is ‘Start.’
Table 20 illustrates how the control method and cooling set point select variables direct the operation of the chiller and the set point to which it controls. The illustration also shows the ON/OFF state of the machine for the given combinations.
Cooling Set Point Select
SINGLE — Unit operation is based on Cooling Set Point 1 (Set Points COOL CSP.1).
DUAL SWITCH — Unit operation is based on Cooling Set Point 1 (Set Points COOL CSP.1) when the Dual Set Point switch contacts are open and Cooling Set Point 2 (Set Points COOL CSP.2) when they are closed.
DUAL CCN OCCUPIED — Unit operation is based on Cooling Set Point 1 (Set Points COOL CSP.1) during the Occupied mode and Cooling Set Point 2 (Set Points COOL CSP.2) during the Unoccupied mode as configured under the local occupancy schedule accessible only from CCN. Schedule Number in Table SCHEDOVR (See Appendix B) must be configured to 1. If the Schedule Number is set to 0, the unit will operate in a continuous 24-hr Occupied mode. Control method must be configured to 0 (switch). See Table 20.
4 TO 20 mA INPUT — Unit operation is based on an external 4 to 20 mA signal input to the Energy Management Module (EMM).
Cooler Pump Control — The AquaSnap® 30MP machines are configured with the Cooler Pump Control (Configuration OPT1 CPC) = ON.
The maximum load allowed for the Chilled Water Pump Starter is 5 VA sealed, 10 VA inrush at 24 volts. The starter coil is powered from the chiller control system. The starter should be wired between LVT 24 and TB3-1. If equipped, the field-in- stalled chilled water pump starter auxiliary contacts should be connected in series with the chilled water flow switch between LVT 16 and LVT 17.
Ice Mode — When Ice Mode is enabled Cooling Setpoint Select must be set to Dual Switch, Dual 7 day or Dual CCN Occupied and the Energy Management Module (EMM) must be installed. Unit operation is based on Cooling Setpoint 1 (CSP.1) during the Occupied mode, Ice Setpoint (CSP.3) during the Unoccupied mode with the Ice Done contacts open and Cooling Setpoint 2 (CSP.2) during the Unoccupied mode with the Ice Done contacts closed. These 3 set points can be utilized to develop your specific control strategy.
Service Test (See Table 4) — Both main power and control circuit power must be on.
The Service Test function should be used to verify proper operation of condenser output, compressors, minimum load valve solenoid (if installed), cooler pump, and remote alarm relay. To use the Service Test mode, the Enable/Off/Remote Contact switch must be in the OFF position. Use the display keys and Table 4 to enter the mode and display TEST. Press ENTER twice so that OFF flashes. Enter the password if required. Use either arrow key to change the TEST value to the ON position and press ENTER . Press ESCAPE and the button to enter the OUTS or COMP sub-mode.
Table 20 — Control Methods and Cooling Set Points
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CONTROL |
OCCUPANCY |
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COOLING SET POINT SELECT (CLSP) |
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TYPE |
STATE |
0 |
1 |
2 |
3 |
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(CTRL) |
(single) |
(dual, switch) |
(dual, occ) |
(4 to 20 mA) |
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0 |
(switch) |
Occupied |
ON,CSP1 |
ON* |
ON,CSP1 |
ON† |
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Unoccupied |
ON,CSP1 |
ON* |
ON,CSP2 |
ON |
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2 |
(Occupancy) |
Occupied |
ON,CSP1 |
ON* |
Illegal |
ON† |
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Unoccupied |
OFF |
OFF |
Illegal |
OFF |
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3 |
(CCN) |
Occupied |
ON,CSP1 |
ON* |
ON,CSP1 |
ON† |
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Unoccupied |
ON,CSP1 |
ON* |
ON,CSP2 |
ON† |
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*Dual set point switch input used. CSP1 used when switch input is open. CSP2 used when switch input is closed. †Cooling set point determined from 4 to 20 mA input to energy management module (EMM) to terminals TB6-3,5.
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