WattMaster MUA II User Manual
www.wattmaster.com
MUA II Controller
Technical Guide
Table of Contents
Controller Overview ......................................................................................................................................... 3
Features .......................................................................................................................................................................................3
Controller Inputs and Outputs ......................................................................................................................... 6
General.........................................................................................................................................................................................6
MUA II Controller Analog Inputs ...................................................................................................................................................6
Relay Outputs...............................................................................................................................................................................6
Analog Output ..............................................................................................................................................................................6
Controller Installation & Wiring ...................................................................................................................... 7
General.........................................................................................................................................................................................7
Controller Mounting ......................................................................................................................................................................7
Important Wiring Considerations ..................................................................................................................................................7
Expansion Board Installation & Wiring ........................................................................................................... 9
Jumper Settings ...........................................................................................................................................................................9
Wiring Considerations ................................................................................................................................................................10
Wiring Details ................................................................................................................................................. 11
Space Temperature Sensor ........................................................................................................................................................ 11
Supply Air Temperature Sensor ..................................................................................................................................................12
Outside Air
Remote Occupied Contact ........................................................................................................................................................13
Outside Air Humidity Sensor .....................................................................................................................................................14
Space Humidity Sensor ..............................................................................................................................................................15
Fan Proof of Flow Switch ...........................................................................................................................................................15
Temperature Sensor .................................................................................................................................................13
Start-up & Commissioning............................................................................................................................. 16
Controller Addressing .................................................................................................................................................................16
Power Wiring .............................................................................................................................................................................16
Initialization.................................................................................................................................................................................17
Programming The Controller ......................................................................................................................................................17
Sequence of Operations ................................................................................................................................ 18
MUA Operation Overview ...........................................................................................................................................................18
MUA Modes ................................................................................................................................................................................18
Initialization.................................................................................................................................................................................21
MUA II Confi guration & Setup ....................................................................................................................................................21
Scheduling..................................................................................................................................................................................22
Force Modes or Overrides..........................................................................................................................................................23
Internal Trend Logging ...............................................................................................................................................................23
Troubleshooting ............................................................................................................................................. 24
Using LED’s To Verify Operation ................................................................................................................................................24
Appendix ........................................................................................................................................................ 26
WattMaster Controls Inc.
8500 NW River Park Drive · Parkville , MO 64152
Toll Free Phone: 866-918-1100
PH: (816) 505-1100 · FAX: (816) 505-1101 · E-mail: mail@wattmaster.com
Visit our web site at www.wattmaster.com
Form: WM-MUAII-TGD-01A Copyright 2009 WattMaster Controls, Inc.
WattMaster Controls, Inc. assumes no responsibility for errors, or omissions.
This document is subject to change without notice.
Controller Overview
MUA II Controller
Features
The MUA II Controller Board is designed with 5 usable analog inputs
and 5 relay outputs. The controller’s input and output capabilities can
be expanded by use of either 2-slot or 4-slot expansion boards that plug
into the MUA II Controller by means of a modular cable. The MUA II
Controller is designed for use with Makeup Air HVAC units. Features
include the following:
• Up to 8 Stages of Cooling (4 on board, 4 more with
expansion board)
• Up to 8 Stages of Heating (4 on board, 4 more with
expansion board)
• External Modulating Heat
• Fan Proving Interlock
• Supply Air Setpoint Reset From Temperature Input
• Dewpoint Setpoint Reset From Humidity Input
• Accepts Remote Occupied Signal
• De-Humidifi cation Capable
• 7-Day, 2-Event-Per-Day Scheduler Built In
• 14-Day Holiday Scheduler Built In
• Internal Trend Logging
Most makeup air control confi gurations can be confi gured with the
standard MUA II Controller. If the application requires more outputs,
optional relay expansion boards are available from the factory to
provide for additional relay outputs as required. These expansion
boards are installed on the MUA II Controller board via a modular
cable connection.
The available expansion board configurations allow for up to 16
additional binary (relay) outputs. The various expansion boards connect
to the expansion board base. Jumpers must be set according to the board
type installed. Up to 4 Relay Output Expansion Boards can be installed
on the expansion base board connected to the controller.
.20 Dia.
Typ. of 4
7.3”
C21
TB1
COMM
T
SHLD
R
CX5
LD6
COMM
LD7
PWR
LD8
LED1
LD9
LED2
R1
U7
RV1
VREFADJ
INPUTS
+VDC
AIN1
AIN2
AIN3
AIN4
AIN5
GND
GND
AOUT1
AOUT2
AIN7
GND
PJ1
TB3
PRESSURE
SENSOR
CX1
RN1
1
U5
RS-485
COMM
1
RN3
P1
+VREF
5.11V
TESTPOINT
EWDOG
RN5
C10
C12
C17
R26
EXPANSION
6.2“
U3
CX2
U2
U1
RAM
HH
U6
C1
R28
ADD
ADDRESS
1
2
4
PU1
8
D6
16
PU2
32
D7
TOKEN
PU3
NETWORK
D8
PU4
SW1
D9
PU5
D11
PU7
D14
D15
C20
PJ2
X2
0-1
0-5
VDC
VDC
JP1
U13
R15
C14
R19
CX13
U15
C15
R22
R24
R25
CX15
PJ3
EPROM
TUC-5RPLUS
YS101816REV. 2
U10
C11
U14
D17
CX3
(1MEG)
CX6
C2
C3
CX10
CX12
U12
CX14
D18
C18
T'STAT
D1
CX4
U4
RLY1
D2
RLY2
D3
PAL
1
RLY3
D4
RN2
RLY4
D5
X1
RLY5
1
RN4
U9
C7
D10
R7
L1
D13
D12
R13
SC1
D19
C19
VR1
VR2
CX8
R10
D16
COM1-3
COM4-5
R6
R11
R27
V6
C9
R1
R2
R3
R4
R5
U8
V1
V2
V3
V4
V5
U11
C13
C16
TB4
GND
POWER
24VAC
TB2
6.6”
6.7”
Figure 1: MUA II Controller Dimensions
Technical Guide 3
MUA II Controller
Controller Overview
2.12
TB2
TB1
C6
GND
24VAC-IN
PWR
LD1
R14
D3
VR2
VR3
4.73
VR4
VR5
VR6
R13
MC
7824CT
CX3
MC
7805ACT
MC
7812CT
MC
7824CT
MC
7824CT
2-Slot Expansion
Base Board
C1
C2 C3
C4 C5
4.24
GND
+24VDC-OUT
YS101780
4.00
4.00
0.28
TB2
TB1
GND
+24VDC-OUT
24VAC-IN
GND
PJ2
PJ1
R11
R9
D2D1 R8
R7
P1
U1
P82B715P
CX1
JP1
R1
R2
R3
U2
P2 JP2
LM358N
CX2
VR1
R10
R4
2 SLOT MODULAR I/O
R5
R6
R12
5.96
5.40
C8
VR2
VR3
VR4
VR5
VR6
9.52
VR7
VR8
LD1
PWR
R20
D3
7824CT
7805ACT
7812CT
7824CT
7824CT
7824CT
7824CT
4 SLOTMODULAR I/O BD.
YS101782
PJ2
PJ1
R17
R19
CX3
R15
D1
D2
C1
R13
R14
P1
U1
P82B715P
C2
C3
C4
C5
C6
C7
CX1
JP1
R1
R2
R3
U2
P2
LM358N
CX2
JP2
R5R4 R6
P3
JP3
R9R8R7
P4
VR1
R16
JP4
R10
R11
R12
R18
8.29
8.96
Figure 2: Expansion Base Board Dimensions
V4
4RLY IO BD.
K4
YS101790
4.00
K3
K4
OMRON
24VDC
G5L-114P-PS
OMRON
24VDC
G5L-114P-PS
K3
RN1
1.67
UL 5A250VAC
CONTACT:
UL 5A250VAC
CONTACT:
K2
OMRON
24VDC
G5L-114P-PS
OMRON
24VDC
G5L-114P-PS
K1
2.12
4-Slot Expansion
Base Board
TB1
V1
UL 5A250VAC
CONTACT:
K1
4.24
UL 5A250VAC
CONTACT:
K2
0.28
4.24
Figure 3: Relay Expansion Board Dimensions
4
U3
CX3
PCF8574P
74HC04N
ULN2803A/
CX2
PHILIPS
TL
HA
AN
ID
U1
CX1
P1
U2
Technical Guide
MUA II Controller
Controller Overview
RS-485
Communications
Loop Connection
RS-485
Communications
Driver Chip
Comm
LED
Power
LED
Diagnostic
Blink Code
LED
Pull-up Resistors
For Analog Inputs
Analog Input
And Output
Terminal Block
Pressure Sensor
(AIN6 Modular Connection)
Not
Used
Modular Service
Tool - Mini Din
Connector
C21
TB1
COMM
T
SHLD
R
CX5
LD6
COMM
LD7
PWR
LD8
LED1
LD9
LED2
R1
U7
RV1
VREF ADJ
INPUTS
+VDC
AIN1
AIN2
AIN3
AIN4
AIN5
GND
GND
AOUT1
AOUT2
AIN7
GND
PJ1
TB3
PRESSURE
SENSOR
Typical
Pin 1
Indicator
CX1
RN1
1
U1
U5
RS-485
COMM
1
RN3
P1
+VREF
5.11V
TEST POINT
EWDOG
RN5
C10
C12
D15
C17
C20
R26
EXPANSION
Mounting Hole
EPROM
RAM
Chip
Chip
ADD
1
2
4
8
16
32
TOKEN
NETWORK
VDC
JP1
PJ3
X2
R15
C14
R19
C15
R22
R24
R25
U3
EPROM
TUC-5R PLUS
YS101816 REV.2
C2
CX10
U10
C11
U12
CX14
U14
D17
T'STAT
(1 MEG)
C3
CX3
CX4
U4
PAL
1
RN2
CX6
X1
1
RN4
U9
C7
D10
CX12
D12
R13
SC1
D19
D18
C19
C18
VR1
CX2
U2
RAM
HH
U6
C1
R28
ADDRESS
PU1
D6
PU2
D7
PU3
D8
PU4
SW1
D9
PU5
D11
PU7
0-1
0-5
VDC
D14
U13
CX13
U15
CX15
PJ2
PAL
Chip
D1
RLY1
D2
RLY2
D3
V1
V2
V3
COM1-3
R1
R2
RLY3
D4
R3
R4
R5
RLY4
RLY5
R7
COM4-5
D5
CX8
L1
R10
D13
D16
TB2
V4
V5
U8
R6
C9
R11
U11
C13
C16
TB4
GND
R27
V6
POWER
24VAC
VR2
Typof4
Mounting
Backplate
Relay Output
Terminal Block
Address Switch
EEPROM
24 VAC
Power Input
Expansion Board
(Modular Connection)
Figure 4: MUA II Controller Component Locations
Technical Guide
Not Used
Real Time
Clock Chip
5
MUA II Controller
Controller Inputs and Outputs
General
The following inputs and outputs are available on the MUA II Controller
and/or the relay expansion boards that can be added to the main controller board expansion port. For component locations of the inputs on the
MUA II Controller, see Figure 4. For wiring of inputs and outputs, see
Figure 5 and 6.
MUA II Controller Analog Inputs
Input #1 - Reset Temperature Sensor
A space temperature sensor can be connected here and used for modulation of the Supply Air Setpoint. At a specifi ed Space Temperature
Setpoint, the Supply Air Setpoint will be reset towards the Maximum
Supply Air Temperature Setpoint.
Input #2 - Supply Air Temperature
The Supply Air Temperature Sensor is connected to this input. This
sensor is used to control heating and cooling staging.
Input #3 - Remote Occupied Contact
This input can be confi gured to monitor a contact closure from another
building automation system which indicates that the equipment should be
operating in the occupied mode. If the remote occupied signal is being
monitored, you must program all the internal schedules to be zero for
both the start and stop times on every day of the week.
Input #4 - Outdoor Air Temperature
The Outdoor Air Temperature Sensor is connected to this input. The
Outdoor Air Temperature Sensor is used to initiate the heating, cooling,
and vent modes of operation. It is also used in combination with the
outdoor air humidity to calculate the Dewpoint Temperature.
Input #5 - Outdoor Air Humidity
This input is used for an Outdoor Air Humidity Sensor that, combined
with the outdoor air temperature, is used to calculate a Dewpoint Temperature for the purpose of dehumidifi cation.
Input #7 - Fan Proof of Flow Switch
or Reset Humidity Sensor
A Proof of Flow Switch that provides a contact closure whenever the fan
is moving air can be monitored on this input. If this contact opens while
the fan is on, all heating and cooling is suspended. This is an optional
item. If a switch is installed, you must confi gure the MUA II to utilize
the signal. If this option is not confi gured, the unit will default to reset
humidity input. An indoor Humidity Sensor can be installed on this
input instead of the Proof of Flow Switch. This extra Humidity Sensor
is used to provide for reset of the Dewpoint setpoint.
Relay Outputs
Relay #1 - Fan (Enable)
This is a non-confi gurable output.
Relay #2 - #5 Confi gurable Relays
These relays are located on the MUA Controller. Confi guration order
and options are the same as for relays #6 through #21 as outlined in the
information for these relays that follows.
Relay #6 - #21 Confi gurable Relays
These relays are available by using Relay Expansion boards connected
to the MUA II Controller. Relays can be confi gured in any order, but we
recommend that they be confi gured in the following order:
1. Heating (aux. heating) stages
2. Cooling (compressor) stages
3. Gas Reheat Control for De-Humidifi cation
4. External Heat Enable
You can have up to 8 stages of Heating (aux. heating) and 8 stages of
Cooling (compressors) as well as individual relays assigned to options
3 and 4 above.
Analog Output
Input #6 - Not Used
6
AOUT1
The MUA II Controller has 1 Analog Output available. The usable output
is located at terminal AOUT1 and is used for controlling an external
heating device. Voltage ranges for this output are user-confi gurable for
either a 0-10 VDC or 2-10 VDC signal.
Technical Guide
MUA II Controller
Controller Installation & Wiring
General
Correct wiring of the MUA II Controller is the most important factor in
the overall success of the controller installation process. In general, most
MUA II Controllers are factory installed and wired. It is also possible to
purchase these controllers directly from WattMaster Controls for installation in the fi eld. Some of the following information pertains to fi eld
wiring and may not apply to your installation since it was pre-wired at
the factory. However, in the unlikely event that troubleshooting of the
controller is required, it is a good idea to be familiar with the system
wiring, no matter if it was factory or fi eld wired.
Controller Mounting
When the controller is to be fi eld mounted, it is important to mount the
controller in a location that is free from extreme high or low temperatures,
moisture, dust, and dirt. It is recommended that it be installed in the
HVAC unit control panel. If this is not practical, it should be mounted
in a separate control enclosure that is weathertight. Be careful not to
damage the electronic components when mounting the controller. Remove the controller from its backplate. Mark the control enclosure base
using the backplate as a template. Drill pilot holes in the enclosure base
and secure the backplate to it using sheet metal screws. Do not allow
metal shavings to fall onto the circuit board. Reattach the controller to
the backplate.
Important Wiring Considerations
Please carefully read and apply the following information when wiring
the MUA II Controller. See Figure 5 for MUA II Controller wiring
diagram.
1. All 24 VAC wiring must be connected so that all ground
wires remain common. Failure to follow this procedure
can result in damage to the controller and connected
devices.
2. All wiring is to be in accordance with local and national
electrical codes and specifi cations.
3. Minimum wire size for 24 VAC wiring should be 18 gauge.
4. Minimum wire size for all sensors should be 24 gauge.
Some sensors require 2-conductor wire and some require
3-conductor.
5. Be sure that all wiring connections are properly inserted
and tightened into the terminal blocks. Do not allow wire
strands to stick out and touch adjoining terminals which
could potentially cause a short circuit.
6. When communication wiring is to be used to interconnect
controllers together or to connect to other communication
devices, all wiring must be minimum 18-gauge,
2-conductor, twisted pair with shield.
7. Before applying power to the MUA II Controller, be sure
to recheck all wiring connections and terminations
thoroughly.
Technical Guide
7
MUA II Controller
Controller Installation & Wiring
Connect To Next Controller And/Or
MiniLink PD On Local Loop
For Stand Alone Applications
Connect To System Manager
All Comm Loop Wiring Is
Straight Thru
TtoT
RtoR
SHLD to SHLD
Analog Inputs
See Individual Sensor
Wiring Diagrams For
Detailed Sensor Wiring
0-10 VDC
0r 2-10 VDC
Connect To
External Heat
Device If Used
Local Loop RS-485
9600 Baud
+
_
C21
CX1
RN1
1
TB1
COMM
T
SHLD
R
CX5
U5
LD6
INPUTS
TB3
RS-485
COMM
COMM
LD7
1
PWR
LD8
LED1
RN3
LD9
LED2
R1
+VREF
5.11V
TESTPOINT
U7
RV1
VREFADJ
+VDC
RN5
AIN1
AIN2
AIN3
AIN4
AIN5
C10
GND
GND
C12
AOUT1
AOUT2
AIN7
C17
GND
PJ1
PRESSURE
SENSOR
EXPANSION
Note: All Temperature Sensors Must Be Thermistor Type III Which
Provide 10K Ohms Resistance @77 Deg. F
U2
U1
RAM
HH
C1
P1
EWDOG
R28
ADDRESS
PU1
D6
PU2
D7
PU3
D8
SW1
PU4
D9
PU5
D11
PU7
0-5
VDC
D14
U13
CX13
D15
U15
C20
CX15
R26
PJ2
MUA II Controller
CX2
U6
PHILIPS
ADD
1
2
4
8
16
32
TOKEN
NETWORK
X2
0-1
VDC
JP1
R15
C14
R19
C15
R22
R24
R25
PJ3
U3
EPROM
TUC-5RPLUS
YS101816REV. 2
U10
C11
U14
D17
T'STAT
C2
CX10
U12
CX14
(1MEG)
CX6
C3
CX12
D18
CX3
X1
C18
Connect To
Expansion Board
Base (When Used)
D1
CX4
U4
RLY1
D2
RLY2
D3
PAL
1
RLY3
D4
RN2
RLY4
D5
RLY5
1
RN4
U9
C7
D10
R7
L1
R10
D13
D12
R13
SC1
D19
C19
7824CT
M
VR1
VR2
CX8
D16
COM1-3
COM4-5
R11
R27
V1
V2
R1
R2
R3
R4
R5
U8
NE5090NPB3192
0PS
R6
C9
9936
U11
MC34064A
C13
C16
GND
V6
POWER
24VAC
V3
TB2
V4
V5
TB4
R - 24VAC
G - Fan ON/OFF Only
Relay Output Dry Contacts
R2 Thru R5 May Be User Configured For
The Following:
1 - Heating (Aux. Heating)Stages
2 - Cooling (Compressor) Stages
3 - Gas Reheat Control For Dehumidification
4 - External Heat Enable
Note: Up To 16 More Relays Are Available
By Adding Relay Expansion Boards. All
Expansion Board Relay Outputs Are User
Configurable As Listed Above.
GND
24VAC
Required VA For
Transformer = 8VA
Warning:
24 VAC Must Be Connected So That All Ground
Wires Remain Common. Failure To Do So Will
Result In Damage To The Controllers.
Line Voltage
Figure 5: MUA II Controller Wiring
8
Technical Guide
Expansion Board Installation & Wiring
Jumper Settings
The expansion boards are connected to the MUA II Controller with
a modular cable. Up to 2 Expansion Base Boards can be populated
with expansion boards to provide additional inputs and outputs. The
expansion boards can be placed on the expansion base board in any
order; however, the jumpers on the Expansion Base Board must be set
correctly for proper operation. See Figure 6 for correct jumper settings
and jumper locations.
4 Relay Output Expansion Board
Relay Outputs - 6 Through 21
N.O. Contact #6 - Configurable
N.O. Contact #7 - Configurable
N.O. Contact #8 - Configurable
N.O. Contact #9 - Configurable
TB1
Common
V1
V4
4RLY IO BD.
Relays 6-9 Relays 10-13
MUA II Controller
K1
UL 5A250VAC
CONTACT:
24VDC
G5L-114P-PS
OMRON
UL 5A250VAC
CONTACT:
24VDC
G5L-114P-PS
OMRON
K4
YS101790
K2
UL 5A250VAC
CONTACT:
K1
24VDC
G5L-114P-PS
OMRON
K2
UL 5A250VAC
CONTACT:
24VDC
G5L-114P-PS
K3
RN1
OMRON
K3
K4
Relays 14-17 Relays 18-21
CX1
ULN2803A/
74HC04N
PCF8574P
P1
PHILIPS
TL
HA
AN
ID
U1
CX2
U2
Address Jumpers
Jumpers
Under
Expansion
Board To Be
Set As Shown
Figure 6: Expansion Board Jumper Settings
Technical Guide
9
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