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RSMD
Technical Manual
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AAON RSMD Technical Manual

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RSMD
Technical Guide
TABLE OF CONTENTS
OVERVIEW ....................................................................................................................................... 4
Features and Applications ........................................................................................................................................ 4
INSTALLATION & WIRING ............................................................................................................... 6
Input Wiring .............................................................................................................................................................. 6
Suction Pressure Sensor ....................................................................................................................................6
Head Pressure Sensor ....................................................................................................................................... 6
Compressor Discharge Temperature Sensors ....................................................................................................6
Output Wiring ...........................................................................................................................................................7
Modulating Compressor ...................................................................................................................................... 7
Condenser Fan Signal ........................................................................................................................................7
INPUTS & OUTPUTS ....................................................................................................................... 8
SEQUENCE OF OPERATIONS ........................................................................................................ 10
Cooling Mode ......................................................................................................................................................... 10
Dehumidifi cation Operation .................................................................................................................................... 10
Head Pressure Control .......................................................................................................................................... 11
AAON/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.orioncontrols.com Copeland Digital Scroll™ is a registered trademark of Copeland Corporation, Sidney, OH
2
www.aaon.com
WattMaster Form: AA-RSMD-TGD-01D Copyright April 2018 WattMaster Controls, Inc. AAON Part Number: V87380
®
is a registered trademark of AAON, Inc., Tulsa, OK.
AAON Neither WattMaster Controls, Inc. nor AAON® assumes any responsibility for errors or omissions in this document. This document is subject to change without notice.
RSMD Technical Guide
TABLE OF CONTENTS
RSMD LCD SCREENS .................................................................................................................... 12
RSMD Main Screens Map ..................................................................................................................................... 13
RSMD Module Screens ......................................................................................................................................... 13
System Status Screens ..........................................................................................................................................14
Sensor Status Screens .......................................................................................................................................... 15
Setpoint Status Screens ........................................................................................................................................ 16
Alarms Screen and Defi nitions ............................................................................................................................... 17
Alarm History Screen .............................................................................................................................................18
Protected Screens Map ......................................................................................................................................... 18
Confi guration Screens ........................................................................................................................................... 19
Diagnostics Screens .............................................................................................................................................. 19
Alarm Count Screen ...............................................................................................................................................21
Address Screen ..................................................................................................................................................... 21
TROUBLESHOOTING ..................................................................................................................... 22
LED Diagnostics .................................................................................................................................................... 22
OE275-01 Suction Pressure Transducer Testing for R410A .................................................................................. 23
Copeland
Leaving Water Temperature Sensor Testing .......................................................................................................... 25
Head Pressure Transducer Troubleshooting .........................................................................................................26
®
Discharge Thermistor Temperature Sensor Testing ............................................................................. 24
APPENDIX: CONDENSER CONFIGURATION OPTIONS ................................................................ 27
Two Condenser Per RSMD .................................................................................................................................... 28
One Condenser Per RSMD ................................................................................................................................... 30
One Condenser Per 2 RSMDs ...............................................................................................................................32
One Condenser Per 3 RSMDs ...............................................................................................................................34
Two Condensers Per 2 RSMDs ............................................................................................................................. 36
On/Off Condenser Options..................................................................................................................................... 39
RSMD Technical Guide
3
OVERVIEW
RSMD Overview
Features & Applications
The OE370-26-RSMD Refrigerant System Module for Digital Compressors (RSMD) (AAON Part No: V61520) can monitor and control up to two compressors and condensers. The compressors can be in either a tandem or non-tandem confi guration. The module is designed for R410-A refrigerant.
The RSMD is connected to the VCC-X / VCCX2 Controller. Up to 4 RSMD’s can be connected, depending on the size of the system. There are 2 E-BUS Expansion Ports which allow the use of communicating sensors and the E-BUS Modules.
The RSMD provides 3 analog inputs, 4 binary inputs, 5 relays, and 2 analog outputs. See Figures 2 & 3, pages 6 & 7 for wiring.
The RSMD Module provides the following:
• Modulates the Compressors to satisfy the Suction Coil (Saturated) Temperature. The Suction Coil (Satu­ rated) Temperature Setpoint is reset by the VCC-X / VCCX2 Controller to maintain the Supply Air Temperature during Cooling mode. During Dehumidi­ fi cation mode, it controls the Compressors to the Suction (Saturation) Temperature Setpoint.
• In Heating mode, the RSMD modulates and stages the compressors to maintain a given Supply Air Temperature Setpoint.
• Modulates the Condenser Fan or Valve to maintain the Head Pressure Setpoint.
• Provides alarms and safeties for the Compressor and Condenser operation.
• Allows connection of the Modular Service Tool SD to the module when required communication wire is run to the VCC-X / VCCX2 Controller.
• Provides a 2 x 8 LCD character display and 4 buttons
that allow for status of system operation, system setpoints, system con gurations, sensors, and alarms, and to change the module’s address, if necessary.
4
RSMD Technical Guide
OVERVIEW
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAYCONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAYOUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1DSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILLBE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY INPUTS
+5 V
+5 V
COMP DIS TEMP1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP2
COMP 2STATUS
GND
GND
OUTSIDE COILTEMP / POWF EMERGENCY SHUTDOWN GND
LEAVING WATERTEMP GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
HH COMMUNICATIONS
E-BUS
R+ SHD T-
DUAL E-BUS EXPANSION
RSMD Dimensions
G5Q-1A4
OMRON
DC12V
CHINA
10A250VAC~
5A30VDC
SA
VDE
Figure 1: RSMD Dimensions
RSMD Technical Guide
5
WIRING
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAY CONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAY OUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1DSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY INPUTS
+5 V
+5 V
COMP DIS TEMP 1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP 2
COMP 2STATUS
GND
GND
OUTSIDE COIL TEMP / POWF EMERGENCY SHUTDOWN GND
LEAVING WATER TEMP GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
HH COMMUNICATIONS
E-BUS
R+ SHD T-
DUAL E-BUS
EXPANSION
RSMD Inputs Wiring
RSMD Wiring
The RSMD monitors and controls one refrigeration circuit of the HVAC unit. The module is designed for R410-A refrigerant.
The RSMD is connected to the VCC-X or VCCX2 Controller. Up to 4 RSMD’s can be connected, depending on the size of the system. There are 2 E-BUS Expansion Ports which allow the use of communicating sensors and the E-BUS Modules.
The RSMD provides 3 analog inputs, 4 binary inputs, 5 relays, and 2 analog outputs. See Figure 2, below for inputs wiring and Figure 3, page 7 for outputs wiring.
Suction Pressure Sensor Wiring
The OE275-01 Suction Pressure Transducers must be wired as shown in Figure 2, below. It is typically required for all VCC-X / VCCX2 applications.
The Suction Pressure Sensors are used to measure suction pressure at the HVAC unit’s DX evaporator coil suction line. This suction line pressure is converted to saturated refrigerant temperature. The saturated refrigerant temperature is used to properly control the compressors to maintain a given Suction Coil (Saturated) Temperature Setpoint. In Cooling mode, the VCC-X / VCCX2 resets the Suction Coil (Saturated) Temperature Setpoint to maintain a given supply air temperature setpoint. In Dehumidifi cation mode, the Suction Coil (Saturated) Temperature Setpoint is a user confi gurable setpoint that can be reset based on indoor humidity levels.
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
SUCTION PRESSURE 1
SENSOR
RD WH
BK
HEAD PRESSURE 1
SENSOR
(BY OTHERS)
SUCTION PRESSURE 2
SENSOR
HEAD PRESSURE 2
SENSOR
(BY OTHERS)
RD WH
BK
RD WH
BK
RD WH
BK
COMP STATUS 1
COMP STATUS 2
OUTSIDE COIL TEMP/POWF
COMP. DISCHARGE
TEMP. 1 SENSOR
COMP. DISCHARGE
TEMP. 2 SENSOR
Figure 2: RSMD Inputs Wiring
6
LEAVING WATER
TEMP SENSOR
EMERGENCY SHUTDOWN
+V SP
GND
+V
HP
GND
+V SP
GND
+V
HP
GND
BIN1
BIN2
BIN3
BIN4
GND
TEMP 1
TEMP 2
TEMP 3
GND
Size Transformer For Correct Total Load. RSMD = 18 VA
RSMD Technical Guide
GND
Line Voltage
24VAC
G5Q-1A4
OMRON
DC12V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
WIRING
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAY CONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAYOUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1DSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY INPUTS
+5 V
+5 V
COMP DIS TEMP 1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP 2
COMP 2STATUS
GND
GND
OUTSIDE COIL TEMP / POWF EMERGENCY SHUTDOWN GND
LEAVING WATER TEMP GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
HH COMMUNICATIONS
E-BUS
R+ SHD T-
DUAL E-BUS EXPANSION
RSMD Outputs Wiring
CAUTION: The Shraeder port used for installation of the
suction pressure transducer should be located in a vertical position of the suction line to prevent refrigerant oil from accumulating in the sensor.
NOTE: If there are two Compressors on a single circuit
(a tandem circuit), Suction Pressure 2, Head Pressure 2, and Condenser Signal 2 would not be used.
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
CHINA
10A250VAC ~
5A30VDC
Head Pressure Control
The Head Pressure Transducers are used to measure Head Pressure at the discharge line. This Head Pressure is used to drive the Condenser Fans with a 0-10 VDC output signal or valve with a 2-10 VDC output signal to maintain a given Head Pressure Setpoint.
Compressor Discharge Sensors
The Digital Compressor Discharge Temperature Sensor monitors the discharge temperature from the Digital Compressor to protect against overheating.
Leaving Water Temperature Sensor
The Leaving Water Temperature Sensor is used to measure the Leaving Water Temperature when used on a WSHP unit.
NOTE:
ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY - 1 AMP MAXIMUM LOAD
24 VAC ONLY
G5Q-1A4
OMRON
DC12V
SA
VDE
RLY1 RLY2
RLY3 RLY4 RLY5
COMM
UNLOAD
24 VAC
UNLOAD
AOUT1 AOUT2 GND
COMPRESSOR 1 ENABLE COMPRESSOR 2 ENABLE CONDENSER 1 ENABLE CONDENSER 2 ENABLE
REVERSING VALVE
DIGITAL
COMPRESSOR 1
+
GND
DIGITAL
COMPRESSOR 2
+
GND
CONDENSER
SIGNAL 1
+
COM
CONDENSER
SIGNAL 2
+
COM
Connect to
VCC-X or
VCCX2 Controller
Figure 3: RSMD Outputs Wiring
RSMD Technical Guide
GND
Line Voltage
24VAC
Size Transformer For Correct Total Load. RSMD = 18 VA
Connects To VCC-X
or VCCX2 Loop
Communications
Connector When Used
On A Split System.
WSE BYPASS
VALVE ACTUATOR
1 COM
2 +
3Y1
Belimo Actuator Wiring Shown. Consult Factory For Other Manufacturer
Wiring Instructions
7
INPUTS & OUTPUTS
RSMD Input/Output Map
REFRIGERATION SYSTEM MODULE
FOR DIGITAL COMPRESSORS
Analog Inputs
1 Suction Pressure 1 Sensor (SP-1)
2 Head Pressure 1 Sensor (HP-1)
3 Suction Pressure 2 Sensor (SP-2)
4 Head Pressure 2 Sensor (HP-2)
Compressor Discharge Temperature Sensor 1
5
(TEMP1)
Compressor Discharge Temperature Sensor 2
6
(TEMP2)
7 Leaving Water Temperature Sensor (TEMP3)
Binary Inputs
1 Compressor Status 1 (BIN1)
2 Compressor Status 2 (BIN2)
Outside Coil Temperature / Proof of Water Flow
3
(BIN3)
4 Emergency Shutdown (BIN4)
Analog Outputs (0-10 VDC)
1 Condenser 1 Fan Signal (AOUT1)
Condenser 2 Fan Signal (0-10 VDC) or WSE
2
Bypass Actuator (2-10 VDC) (AOUT2)
Binary Outputs (24 VAC)
1 Compressor 1 Enable Relay (RLY1)
2 Compressor 2 Enable Relay (RLY2)
3 Condenser 1 Enable Relay (RLY3)
Zone
Zone
4 Condenser 1 Enable Relay (RLY4)
Table 1: RSMD Inputs & Outputs
8
RSMD Technical Guide
INPUTS & OUTPUTS
RSMD Inputs & Outputs
RSMD - Inputs & Outputs
+5V VDC Power
This output is a 5 VDC output that supplies power to the Suction Pressure Transducers.
SP-1 & SP-2 - Suction Pressure Transducers
The Suction Pressure Sensors are used to measure suction pressure at the HVAC unit’s DX evaporator coil suction line. This suction line pressure is converted to saturated refrigerant temperature. The saturated refrigerant temperature is used to properly control the compressors to maintain a given Suction Coil (Saturated) Temperature Setpoint. In Cooling mode, the VCC-X / VCCX2 resets the Suction Coil (Saturated) Temperature Setpoint to maintain a given supply air temperature setpoint. In Dehumidifi cation mode, the Suction Coil (Saturated) Temperature Setpoint is a user confi gurable setpoint that can be reset based on indoor humidity levels.
+5V VDC Power
This output is a 5 VDC output that supplies power to the Head Pres­sure Transducer.
HP-1 & HP-2 - Head Pressure Transducers
The Head Pressure Transducers are used to measure Head Pressure at the discharge line. This Head Pressure is used to drive the Condenser Fans to maintain a given Head Pressure Setpoint.
TEMP1 & TEMP2 - Compressor Discharge Tem­perature Sensor 1 & Sensor 2 Input
The Digital Compressor Discharge Temperature Sensors monitor the discharge temperature from the Digital Compressor to protect against overheating.
TEMP3 - Leaving Water Temperature Sensor Input
This input monitors the Condenser Leaving Water Temperature and determines if the water source condenser is operating in a safe water temperature range.
BIN1 - Compressor Status 1
When this wet contact input closes, a 24 volt signal to Binary Input #1 indicates that Compressor 1 is running. Typically, the source for this is relay output 1. If Binary Input 1 opens, Compressor 1 Enable Relay will de-energize and a Compressor Alarm will be generated.
BIN2 - Compressor Status 2
When this wet contact input closes, a 24 volt signal to Binary Input #2 indicates that Compressor 2 is running. Typically, the source for this is relay output 2. If Binary Input 2 opens, Compressor 2 Enable Relay will de-energize and a Compressor Alarm will be generated
BIN3 - Outside Coil Temperature / Proof of Water Flow Status
This input can be used for the following two options:
Air to Air Heat Pump
This wet contact input monitors a Defrost Coil Temperature Switch on air to air heat pump units. If the compressors are operating in the Heating Mode and this switch closes, it will initiate a Defrost Mode.
Water Source Heat Pump
This wet contact input is for the Water Proof of Flow Switch. If the Water Proof of Flow Switch contact opens while the Condenser Valve is operating, the controller will react to protect the system depending on the current mode of operation.
BIN4 - Emergency Shutdown
This wet contact input is used to initiate shutdown of the HVAC unit when a N.C. Smoke Detector (by others), Firestat (by others), or other shutdown condition (by others) contact is opened. The controller remains active and can initiate alarm relays.
NOTE: The Binary Inputs require wet contacts (24 VAC
only) to recognize an active input. If you provide dry contacts, the contact closure will not be recognized.
AOUT1 - Condenser Fan 1 Signal
This 0-10 VDC output is used to control/modulate the Condenser 1 Fan /Valve to maintain the Head Pressure Setpoint.
AOUT2 - Condenser Fan 2 Signal or Waterside Economizer Bypass Actuator Valve
This 0-10 VDC output is used to control/modulate the Condenser 2 Fan /Valve to maintain the Head Pressure Setpoint or this output signal is a Direct Acting 2-10 VDC output signal that is used to modulate the Water Side Economizer Bypass Actuator.
RLY1 - Compressor 1 Enable
This relay enables the Compressor 1.
RLY2 - Compressor 2 Enable
This relay enables the Compressor 2.
RLY3 - Condenser 1 Enable
This relay enables the Condenser 1 Fan / Water Valve.
RLY4 - Condenser 2 Enable
This relay enables the Condenser 2 Fan / Water Valve.
.
RLY5 - Reversing Valve Enable
This relay enables the Reversing Valve.
RSMD Technical Guide
9
Zone
SEQUENCE OF OPERATIONS
Cooling Mode & Dehumidifi cation Operation
Zone
Cooling Mode Operation
In the Cooling Mode, as the Supply Air Temperature (SAT) rises above the Active SAT Cooling Setpoint, the compressors will stage on and modulate to maintain the Active Evaporator Coil Suction (Saturated) Temperature Setpoint. Two compressors are controlled per Refrigerant System Module (RSMD). Multiple RSMDs are needed when there are more than two compressors
In units with one digital and one fi xed compressors, if the digital compressor modulates to 100% and the SAT is still above the SAT Cooling Setpoint for the Cooling Stage Up Delay, then the fi xed compressor will stage on. The digital compressor will then be allowed to modulate as necessary to maintain the Active Evaporator Coil Suction (Saturated) Temperature Setpoint. Minimum off times must also be met before compressors can stage on.
In units with multiple digital compressors, if the 1st digital compressor modulates to 100% and the SAT is still above the SAT Cooling Setpoint for the Cooling Stage Up Delay, then the 2nd digital compressors will enable and the two digital Compressors will then modulate together to maintain the Active Evaporator Coil Suction (Saturated) Temperature Setpoint.
To stage down compressors, if the digital compressor(s) have modulated down to 30% for the Stage Down Delay period and the SAT has fallen below the SAT Cooling Setpoint minus the Stage Control Window, then the last compressor to have staged on (digital or Fixed) will stage off – assuming its Minimum Run Time has been met. Any remaining digital compressors are then allowed to modulate as needed. If the last remaining digital compressor reaches 0% for the Stage Down Delay, it will stage off .
Dehumidifi cation Operation
The RSMD activates the Cooling Stages based on the actual Evaporator Coil Temperature compared to the Evaporator Coil Suction (Saturation) Temperature Setpoint. The Evaporator Coil Suction (Saturation) Temperature is calculated by using the Suction Pressure Sensor and converting the pressure to temperature.
For Copeland Digital Scroll™ Compressor units, the RSMD will modulate the Copeland Digital Scroll™ Compressor to maintain the Evaporator Coil Suction (Saturation) Temperature Setpoint and activate the Compressors as necessary.
On units that have one Digital and one Fixed Capacity Compressor, if the Fixed Capacity Compressor is activated, the Copeland Digital Scroll™ Compressor will only be allowed to modulate within the range of 70% - 100% in order to prevent the loss of reheat capacity during low load conditions. If, with both compressors on, the 1st digital compressor has modulated down to its 70% minimum and the Coil Suction Temperature falls below the Coil Temperature Setpoint minus the Cooling Stage Control Window, then the second compressor will stage off once its Compressor Minimum Run Time and the Stage Down Delay Timers have been met. At that point, the Copeland Digital Scroll™ Compressor can modulate down as needed to maintain the Coil Temperature Setpoint.
If the RSMD has two Digital Compressors, the 1st Compressor will be locked at 100% and the 2nd Compressor will modulate.
10
RSMD Technical Guide
SEQUENCE OF OPERATIONS
Head Pressure Control
The Refrigeration System Module for Digital Compressors (RSMD) can monitor a Head Pressure Transducer and control a Condenser Fan to maintain a Head Pressure Setpoint. The RSMD must be confi gured for an Air Cooled Condenser.
A Condenser Relay is commanded on when the fi rst compressor is enabled (except if the unit is in Heat Pump Defrost Mode). On an Air Cooled Unit, the Condenser Fan will be controlled with 0-10 VDC output signal.
When the Condenser Signal fi rst activates, it maintains at 100% for 10 seconds.
In the Cooling Mode, the Condenser Signal will modulate to maintain the Cooling Head Pressure Setpoint. The signal can modulate between 15% and 100%. If the Head Pressure exceeds 550 PSIG, the condenser control signal will immediately go to 100% and a High Head Pressure Alarm will be generated. The alarm will be deactivated when the Head Pressure drops below 540 PSIG.
Head Pressure Control
In the Dehumidifi cation Mode, the Condenser Output Signal controls to the Reheat Head Pressure Setpoint. High Head Pressure conditions produce the same eff ects as in the Cooling Mode.
If no Head Pressure Sensor is detected, the Condenser Output Signal will be maintained at 100%.
RSMD Technical Guide
11
LCD SCREENS
LCD Display Screen & Navigation Keys
LCD Display Screen & Navigation Keys
The LCD display screens and buttons allow you to view status and alarms, and enable force modes. See Figure 4, below and refer to Table 2 for descriptions.
Figure 4: LCD Display and Navigation Keys
NAVIGATION
KEY
MENU
UP
DOWN
ENTER
Use the MENU key to move through screens within Main Menu categories and return to the Main Menu while at other screens.
Use this key to adjust setpoints and change confi gurations.
Use this key to adjust setpoints and change confi gurations.
Use the ENTER key to navigate through the Main Menu Screen categories.
KEY FUNCTION
Table 2: Navigation Key Functions
12
RSMD Technical Guide
RSMD LCD SCREENS
Main Screen Map & RSMD Module Screens
RSMD Main Screens Map
Refer to the following map when navigating through the LCD Main Screens. To scroll through the screens, press the <MENU> button.
RSMD
1067vxxx
Press to scroll through REFRIG MODULE Screens.
Press to go to SYSTEM STATUS Screens.
SYSTEM STATUS
Press to scroll through SYSTEM STATUS Screens.
Press to go to SENSOR STATUS Screen.
SENSOR STATUS
RSMD Module Screens
Refer to the following map when navigating through the RSMD Screens. From the RSMD Screen, press <ENTER> to scroll through the screens.
RSMD
1067vxxx
EBUS COMM
PACKETS
E-BUS COMMUNICATION DIAGNOSTICS
Number of COMM packets received.
SOFTWARE 1067vXXX
Press to scroll through SENSOR STATUS Screens.
Press to go to ALARMS Screens.
ALARMS
Press to scroll through ALARMS Screens.
Press to go to ALARM HISTORY Screens.
ALARM
HISTORY
Press to scroll through ALARM HISTORY Screens.
Press to go to SETPOINT STATUS Screens.
SETPOINT
STATUS
CURRENT SOFTWARE VERSION
You can access the protected
screens from this screen by holding
the <UP> button for 5 seconds.
BOARD/EBUS
ADDRESS
CURRENT BOARD ADDRESS
#COMP
CONFIGURED
# OF COMPRESSORS CONFIGURED
#COND
CONFIGURED
Press to scroll through SETPOINT STATUS Screens.
RSMD Technical Guide
# OF CONDENSERS CONFIGURED
13
RSMD LCD SCREENS
System Status Screens
COMP A1-B1
FIXED OR DIG
COMPRESSOR A1 or B1 - Fixed or Digital
COMP A2-B2
FIXED OR DIG
COMPRESSOR A2 or B2 - Fixed or Digital
System Status Screens
Refer to the following map when navigating through the System Status Screens. From the SYSTEM STATUS Screen, press
<ENTER> to scroll through the screens.
COMP A2-B2
ON/OFF
COMPRESSOR A2, B2
(based on board address)
ON, OFF, FORCE
ON: Compressor is on.
OFF: Compressor is off .
COND 1 FAN
OFF/
MODULATING %
CONDENSER FAN 1
OFF, MOD POSITION
OFF: Condenser is off .
MODULATING PERCENTAGE: 0-100%
SYSTEM STATUS
MODE OF
OPERATION
SYSTEM MODE OF OPERATION
Possible choices are
OFF, COOL, HEAT, DEHUMID, FORCE
COMP A1-B1
OFF/
MODULATING %
COMPRESSOR A1, B1
(based on board address)
OFF / MOD POSITION
OFF: Compressor is off .
MODULATING PERCENTAGE: 0-100%
COND 2 FAN
OFF/
MODULATING %
CONDENSER FAN 2
OFF, MOD POSITION
OFF: Condenser is off .
MODULATING PERCENTAGE: 0-100%
OR
IF CONFIGURED FOR WATER SIDE ECONOMIZER BYPASS
BYPS VLV
CLOSED OR
% VALVE
WATER SIDE ECONOMIZER BYPASS VALVE
CLOSED OR MOD POSITION
CLOSED: Valve is closed.
MODULATING PERCENTAGE: 0-100%
IF CONFIGURED FOR AIR TO AIR HEAT PUMP
DEFROST
# MINUTES
14
DEFROST INTERVAL TIMER
# MINUTES
RSMD Technical Guide
OR
IF CONFIGURED FOR WATER SOURCE HEAT PUMP
H2O FLOW
YES/NO
WATER FLOW
YES/NO
Sensor Status Screens
RSMD LCD SCREENS
Sensor Status Screens
CALC CT1
XX DEG
CALCULATED COIL TEMPERATURE 1 FROM
SUCTION PRESSURE 1 INPUT
Refer to the following map when navigating through the Sensor Status Screens. From the SENSOR STATUS Screen, press
<ENTER> to scroll through the screens.
SENSOR STATUS
SUCTION 1
XXX PSI
SUCTION PRESSURE 1 READING FROM INPUT
HEAD PR1
XXX PSI
HEAD PRESSURE 1 READING FROM INPUT
CALC CT2
XX DEG
CALCULATED COIL TEMPERATURE 2 FROM
SUCTION PRESSURE 2 INPUT
COMPTMP1
XX DEG
COMPRESSOR TEMPERATURE 1 READING FROM
HEAD PRESSURE 1 INPUT
COMPTMP2
XX DEG
COMPRESSOR TEMPERATURE 2 READING FROM
HEAD PRESSURE 2 INPUT
SUCTION 2
XXX PSI
SUCTION PRESSURE 2 READING FROM INPUT
HEAD PR2
XXX PSI
HEAD PRESSURE 2 READING FROM INPUT
RSMD Technical Guide
IF CONFIGURED FOR WATER SOURCE HEAT PUMP
H2O TEMP
XX DEG
WATER TEMPERATURE READING FROM
LEAVING WATER TEMPERATURE SENSOR
15
RSMD LCD SCREENS
Setpoint Status Screens
Setpoint Status Screens
Refer to the following map when navigating through the Setpoint Status Screens. From the SETPOINT STATUS Screen, press
<ENTER> to scroll through the screens.
SETPOINT
STATUS
COILT SP
35 DEG
COIL TEMPERATURE SETPOINT STATUS
Valid range is 35 to 70 degrees. Default is 35 degrees.
IF CONFIGURED FOR MODULATING CONDENSER,
THE SCREEN BELOW WILL DISPLAY
IF CONFIGURED FOR WATER SOURCE HEAT PUMP,
THE THREE SCREENS BELOW WILL DISPLAY
GLYCOL %
%
GLYCOL PERCENTAGE STATUS
LOW SUCT
95 PSI
LOW SUCTION PRESSURE SETPOINT STATUS
Default is 95 PSI.
HEADPRSP
340 PSI
HEAD PRESSURE SETPOINT STATUS
Valid range is 275 to 475 PSI. Default is 340 PSI.
IF CONFIGURED FOR FAN CYCLE,
THE TWO SCREENS BELOW WILL DISPLAY
FAN ON
XX PSI
HEAD PRESSURE READING WHEN FAN CYCLE IS ON
FAN OFF
XX PSI
LOW H2O
37 DEGF
LOW LEAVING WATER TEMPERATURE SETPOINT STATUS
Default is 37 Degrees F.
IF CONFIGURED FOR AIR TO AIR HEAT PUMP,
THE SCREEN BELOW WILL DISPLAY
DEFR INT
30 MIN
DEFROST INTERVAL SETPOINT STATUS
Default is 30 minutes.
HEAD PRESSURE READING WHEN FAN CYCLE IS OFF
16
RSMD Technical Guide
RSMD LCD SCREENS
Alarms Screen & Alarm History
Alarms Screen
If an alarm is present, the ALARM LED above the LCD display will light up red and blink. The Alarms will display and scroll automatically from the ALARMS screen when alarms are present.
ALARMS
The alarms are as follows:
NO ALARMS: This will be shown if there are no current alarms.
EBUS SLAVE (SLV) TIMEOUT: This alarm indicates that com-
munication has been lost between the RSMD and the Main controller or other E-BUS modules that may be connected. This can be the result of a bad cable, a missing cable, or the module not being confi gured
properly.
NO SUCTION PRESSURE SENSOR 1 (SUCT1) DETECTED:
This alarm indicates the Suction Pressure Sensor 1 is not detected by the system. There is no compressor failure from this alarm. The failure will be unsafe suction pressure.
NO SUCTION PRESSURE SENSOR 2 (SUCT2) DETECTED:
This alarm indicates the Suction Pressure Sensor 2 is not detected by the system. There is no compressor failure from this alarm. The failure will be unsafe suction pressure.
NO HEAD PRESSURE SENSOR 1 (HEAD1) DETECTED: This
alarm indicates the Head Pressure Sensor 1 is not detected by the system. This will cause the condenser fan/valve to go to 100%.
NO HEAD PRESSURE SENSOR 2 (HEAD2) DETECTED: This
alarm indicates the Head Pressure Sensor 2 is not detected by the system. This will cause the condenser fan/valve to go to 100%.
HIGH HEAD PRESSURE 1 (HP1) DETECTED: This indicates a
High Head Pressure Alarm condition which is activated when the Head Pressure 1 rises above 550 PSIG. This will cause the condenser to go to 100%.
HIGH HEAD PRESSURE 2 (HP2) DETECTED: This indicates a
High Head Pressure Alarm condition which is activated when the Head Pressure 2 rises above 550 PSIG. This will cause the condenser to go to 100%.
LOW SUCTION PRESSURE 1 (SP1) FAILURE: This alarm
will occur if suction pressure 1 stays below the low suction pressure setpoint for 1 minute or falls below 40 psi for 5 seconds. This alarm will shut down the system. Power must be cycled to clear the alarm.
LOW SUCTION PRESSURE 2 (SP2) FAILURE: This alarm
will occur if suction pressure 2 stays below the low suction pressure setpoint for 1 minute or falls below 40 psi for 5 seconds. This alarm will shut down the system. Power must be cycled to clear the alarm.
LOW SUCTION PRESSURE 1 (SP1) DETECTED: This alarm
will occur if suction pressure 1 falls below the low suction pressure setpoint for 20 seconds. The system will try to protect by lowering com­pressor modulation percentage.
LOW SUCTION PRESSURE 2 (SP2) DETECTED: This alarm
will occur if suction pressure 2 falls below the low suction pressure setpoint for 20 seconds. The system will try to protect by lowering com­pressor modulation percentage.
COMPRESSOR (COMP1) 1 FAULT: This alarm will occur if the
compressor fails to run 45 seconds after the relay is activated or if the signal is lost after activation. This will cause an alarm and will shut down the compressor (relay). The system will retry after 5 minutes.
COMPRESSOR (COMP) 2 FAULT: This alarm will occur if the
compressor fails to run 45 seconds after the relay is activated or if the signal is lost after activation. This will cause an alarm and will shut down the compressor (relay). The system will retry after 5 minutes.
COMPRESSOR (COMP1) 1 BAD TEMPERATURE: This alarm
will occur if the discharge temp sensor 1 measures less than -40 degrees F or more than 356 degrees F. This will cause an alarm and will shut down the compressor (relay). The system will retry after 5 minutes.
COMPRESSOR (COMP2) 2 BAD TEMPERATURE: This alarm
will occur if the discharge temp sensor 2 measures less than -40 degrees F or more than 356 degrees F. This will cause an alarm and will shut down the compressor (relay). The system will retry after 5 minutes.
COMPRESSOR (COMP) 1 CUTOFF: This alarm will occur if the
discharge temp sensor 1 measures more than 265 degrees F. This will cause an alarm and will shut down the compressor (relay). The system will can be restarted after 30 minutes.
COMPRESSOR (COMP) 2 CUTOFF: This alarm will occur if the
discharge temp sensor 2 measures more than 265 degrees F. This will cause an alarm and will shut down the compressor (relay). The system will can be restarted after 30 minutes.
COMPRESSOR (COMP) 1 or 2 LOCKOUT: If active cutoff oc-
curs 5 times within a 4 hour period, the compressor will be locked out. Must cycle power to RSMD to clear the alarm.
• If a circuit’s Suction Pressure falls below the Low Suction
Pressure Setpoint for longer than one minute twice within a two hour window, the compressor on that circuit will be locked out. Manual reset or change of mode is required to return to normal operation.
• If the Suction Pressure falls below the Unsafe Suction
Setpoint for 5 seconds, that circuit’s compressor will locked out. Power will need to be cycled to restart the unit.
• If the Leaving Water Temperature falls below setpoint,
the last compressor will be locked out until the Leaving Water Temperature rises 6 degrees above setpoint.
• The Leaving Water Temperature remains below setpoint for
1 minute or falls 3 degrees below setpoint. This alarm will disable when the leaving water temperature rises 12 degrees above the setpoint.
NO PROOF OF H2O FLOW: There is a call for a compressor and
there is no Proof of Flow Input Enable for more than 3 minutes or if dur­ing Heat Pump heating, the Proof of Flow Enable is open for more than 2 seconds. This alarm will disable when Proof of Flow is enabled.
LOW H2O TEMPERATURE: If both compressors are on and water
temp goes below setpoint, compressor 2 will fail. If both compressors are on and water temp goes 3 degrees below setpoint, both compres­sors will fail. If second compressor is off or failed and water temp is still low for 1 minute, the fi rst compressor will also fail. This alarm will disable when the leaving water temperature rises 6 degrees above the setpoint.
RSMD Technical Guide
17
RSMD LCD SCREENS
Alarm History & Protected Screens
EMERGENCY SHUTDOWN: If the Emergency Shutdown binary in-
put is not activated, the compressors will shut off .
COMPRESSOR 1 FALSE ACTIVE INPUT: If the compressor relay
is off but the compressor binary active input is activated for 60 seconds, it will cause an alarm.
COMPRESSOR 1 FALSE ACTIVE INPUT: If the compressor relay
is off but the compressor binary active input is activated for 60 seconds, it will cause an alarm.
Alarm History Screens
The ALARM HISTORY Screen displays past alarms, if any, and how long ago the last of each type occurred. From the ALARM HISTORY Screen, press <ENTER> to scroll through the history screens.
ALARM
HISTORY
Protected Screens Map
Refer to the following map when navigating through the LCD Protected Screens. From the RSMD Screen, press twice to get to the Software Screen. Then hold the <UP> button for 5 seconds. To scroll through the rest of the screens, press the
<MENU> button.
RSMD
1067vxxx
E-BUS
+0
SOFTWARE 1067vxxx
Hold for 5 seconds.
<ENTER>
The Alarm will appear on the fi rst line and the second line will display how long ago each alarm last occurred. As a result, the alarms listed on the ALARMS screen will be abbreviated as follows in order of the way they are listed in the prior ALARMS screen section.
NOTE: The screen will display minutes for the fi rst 60 minutes
of alarm occurrence, hours for the next 72 hours of alarm occurrence, and days for the next 30 days of alarm occurrence. After 30 days, the alarm will clear. Alarm history is not stored in memory. So, if power is lost, the alarms will clear.
CONFIG
DIAGNSTC
ALARM
COUNTS
ADDRESS
1(152)
ENTER TO
EXIT
18
RSMD Technical Guide
RSMD LCD SCREENS
Confi guration & Diagnostic Screens
Confi guration Screens
Refer to the following map when navigating through the Confi guration Screens. From the CONFIG Screen, press to scroll through the screens.
CONFIG
<ENTER>
EPROM:
HOLD
DOWN
TO
COND FAN
LOCKED/UNLOCKED
CONDENSER FAN LOCKED OR UNLOCKED
LOCK POS
100%
CONDENSER FAN LOCKED POSITION
Diagnostic Screens
Refer to the following map when navigating through the Diagnostic Screens. From the DIAGNSTC Screen, press <ENTER> to scroll through the screens.
DIAGNSTC
LOAD
DEFAULTS
SP-1 VLT
X.XX
SUCTION PRESSURE SENSOR 1 VOLTAGE
Displays the current voltage of the Suction Pressure Sensor 1.
HP-1 VLT
X.XX
HEAD PRESSURE SENSOR 1 VOLTAGE
Displays the current voltage of the Head Pressure Sensor 1.
WDOG CNT
#
WATCH DOG TIMER
Displays the number of times the board has been reset due to
watchdog timer overfl ow.
POWR CNT
#
POWER LOSS COUNT
Displays the number of times the board has been reset
due to power loss.
RSMD Technical Guide
SP-2 VLT
X.XX
SUCTION PRESSURE SENSOR 2 VOLTAGE
Displays the current voltage of the Suction Pressure Sensor 2.
HP-2 VLT
X.XX
HEAD PRESSURE SENSOR 2 VOLTAGE
Displays the current voltage of the Head Pressure Sensor 2.
19
RSMD LCD SCREENS
Diagnostic Screens
BIN 1 - BIN 4
ON/OFF
BINARY INPUTS #1 - #4
Displays the current status of each Binary Input.
TMP1 VLT
X.XX
COIL TEMPERATURE SENSOR 1 VOLTAGE
Displays the current voltage of the 1st Coil Temperature Sensor.
TMP2 VLT
X.XX
IF FORCE MODE IS ON, THE FOLLOWING SCREENS
WILL APPEAR:
RLY 1-5
ON/OFF
RELAYS 1 - 5 FORCE MODE
Press the <UP> and <DOWN> buttons to select ON or OFF
for each relay
TRIAC 1
ON/OFF
TRIAC 1
Displays the current status of Digital Compressor 1.
Values are ON/OFF.
TRIAC 2
ON/OFF
COIL TEMPERATURE SENSOR 2 VOLTAGE
Displays the current voltage of the 2nd Coil Temperature Sensor.
TMP3 VLT
X.XX
TEMPERATURE SENSOR 3 VOLTAGE
Displays the current voltage of the Leaving Water Temperature Sensor.
FORCE MODE
ON/OFF
FORCE MODE
Displays the current status of Force Mode. Values are ON/OFF.
Displays the current status of Digital Compressor 2.
TRIAC 2
Values are ON/OFF.
AOUT-1 V
0.0-10.0 vdc
CONDENSER SIGNAL 1 FORCE
0.0 to 10.0 = Active Force Mode.
Press the <UP> and <DOWN> buttons to increase
and decrease the value.
AOUT-2 V
1.0-10.0 vdc
CONDENSER SIGNAL 2 FORCE
1.0 to 10.0 = Active Force Mode.
Press the <UP> and <DOWN> buttons to increase
and decrease the value.
20
RSMD Technical Guide
RSMD LCD SCREENS
Alarm Counts & Address Screen
ALARM COUNTS Screens
From the ALARM COUNTS Screen, press <ENTER> to scroll through the screens. Each screen will display the name of the alarm and how many times the alarm has occurred since you last cleared the alarms. The only way to clear these alarm counts is by using Prism 2 and selecting, “Select Alarms to Delete” from the ALARM button menu. See “Alarm Polling” in the Prism 2 Technical Guide for more information.
Address Screen
ADDRESS
1(152)
CURRENT BOARD ADDRESS
Confi gure the address according to which refrigerant circuit
this module represents—1=A, 2=B, 3=C, 4=D
Number in parentheses is E-BUS address.
Module 1’s address is 152, Module 2’s address is 153,
Module 3’s address is 154, Module 4’s address is 155
RSMD Technical Guide
21
TROUBLESHOOTING
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAY CONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAYOUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1CSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY INPUTS
+5 V
+5 V
COMP DIS TEMP 1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP 2
COMP 2STATUS
GND
GND
OUTSIDE COIL TEMP / POWF
EMERGENCY SHUTDOWN
GND
LEAVING WATER TEMP GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
E-BUS
E-BUS
RSM LED Diagnostics
Zone
Zone
Using RSM LEDs To Verify Operation
The RSMs are equipped with LEDs that can be used to verify operation and perform troubleshooting. There are LEDs for communication, operation modes, and diagnostic codes. See Figure 5, below for the LED locations. The LEDs associated with these inputs and outputs allow you to see what is active without using a voltmeter. The LEDs and their uses are as follows:
Diagnostic LEDs
STATUS - If the software is running, this LED should blink at a rate
of 1 blink per second.
ALARM (on board) - If the module does not receive communications
for more than 1 minute, this LED will light up, the relays will turn off , and the Analog Outputs will go to 0 VDC.
ALARM (above LCD display) - This red LED will light up and stay
lit when there is an alarm present. The type of alarm will display on the LCD display. The ALARM LED also blinks when the expansion valve is initializing at startup.
COMM - Every time the module receives a valid E-BUS request
from the VCC-X / VCCX2 Controller, this LED will blink on and then off , signifying that it received a valid request and responded.
POWER - This LED will light up to indicate that 24 VAC power has
been applied to the controller.
Binary Input LEDs
BIN1 - This green LED will light up when Compressor Status 1
contact is closed.
BIN2 - This green LED will light up when Compressor Status 2
switch is closed.
BIN3 - This green LED will light up when the Outside Coil
Temperature switch is closed.
BIN4 - This green LED will light up when the Emergency Shutdown
switch is closed.
Relay LEDs
RLY1 - RLY5 - These green LEDs will light up when the relays are
enabled and will stay lit as long as they are active.
Digital Compressor LEDs
COMP1 - This green LED will light up when Digital Compressor
1 is unloading.
COMP2 - This green LED will light up when Digital Compressor
2 is unloading.
STATUS ALARM COMM POWER LEDs
BINARY INPUT LEDs
Figure 5: RSMD LED Locations
22
ALARM LED
RSMD
G5Q-1A4
OMRON
DC12V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
RELAY LEDs
COMP-1 LED
COMP-2 LED
RSMD Technical Guide
TROUBLESHOOTING
OE275-01 Suction Pressure Transducer Testing
OE275-01 Suction Pressure Transducer Testing for R410A Refrigerant
The Evaporator Coil Temperature is calculated by converting the Suction Pressure to Temperature. The Suction Pressure is obtained by using the OE275-01 Suction Pressure Transducer, which is connected into the Suction Line of the Compressor.
Use the voltage column to check the Suction Pressure Transducer while connected to the RSMD Module(s). The VCC-X/VCCX2 and the RSMD Module(s) must be powered for this test. Read voltage with a meter set on DC volts. Place the positive lead from the meter on the SP1/SP2 terminal located on the RSMD Module(s) terminal block. Place the negative lead from the meter on the ground (GND) terminal located adjacent to the SP1/SP2 terminal on the RSMD Module(s) terminal block. Use a refrigerant gauge set and/or an accurate electronic thermometer to measure the temperature or suction line pressure near where the Suction Pressure Transducer is connected to the suction line. Measure the Voltage at the SP1/ SP2 and GND terminals and compare it to the appropriate chart depending on the refrigerant you are using. If the temperature/ voltage or pressure/voltage readings do not align closely with the chart, your Suction Pressure Transducer is probably defective and will need to be replaced.
See the OE275-01 Suction Pressure Transducer, Pressure, Temperature, and Voltage Chart for R410A Refrigerant testing. The charts show a temperature range from 20°F to 80°F. For troubleshooting purposes, the DC Voltage readings are also listed with their corresponding temperatures and pressures.
OE275-01 Suction Pressure Transducer
Coil Pressure
– Temperature – Voltage Chart for R410A
Refrigerant
°F
Temperature
21.19 80.94 1.8 59.03 168.10 3.2
24.49 87.16 1.9 61.17 174.32 3.3
27.80 93.39 2.0 63.19 180.55 3.4
30.99 99.62 2.1 65.21 186.78 3.5
33.89 105.84 2.2 67.23 193.00 3.6
36.80 112.07 2.3 69.24 199.23 3.7
39.71 118.29 2.4 71.15 205.46 3.8
42.30 124.52 2.5 72.95 211.68 3.9
44.85 130.75 2.6 74.76 217.91 4.0
47.39 136.97 2.7 76.57 224.14 4.1
49.94 143.2 2.8 78.37 230.36 4.2
52.23 149.42 2.9 80.18 236.59 4.3
54.50 155.65 3.0
56.76 161.88 3.1
Pressure
PSI
Signal
DC Volts
Temperature
°F
PSI
Pressure
Signal
DC Volts
Table 3: Coil Pressure/Voltage/Temp for OE275-01 Suction Pressure Transducers - R410A Refrigerant
RSMD Technical Guide
23
Zone
TROUBLESHOOTING
Zone
Copeland® Discharge Thermistor Temperature Sensor Testing
Copeland® Discharge Thermistor Temperature Sensor Testing
The following sensor voltage and resistance table is provided to aid in checking sensors that appear to be operating incorrectly. Many system operating problems can be traced to incorrect sensor wiring. Be sure all sensors are wired per the wiring diagrams in this manual.
If the sensors still do not appear to be operating or reading correctly, check voltage and/or resistance to confi rm that the sensor is operating correctly per the table. Please follow the notes and instructions the appear after the chart when checking sensors.
Discharge Thermistor Temperature/
Resistance
Temp
(ºF)
-40 -40 2889.60 4.98
-31 -35 2087.22 4.97
-22 -30 1522.20 4.96
-13 -25 1121.44 4.95
-4 -20 834.72 4.94
5 -15 627.28 4.92
14 -10 475.74 4.89
23 -5 363.99 4.86
32 0 280.82 4.82
41 5 218.41 4.77
50 10 171.17 4.72
59 15 135.14 4.65
68 20 107.44 4.57
77 25 86.00 4.47
86 30 69.28 4.36
95 35 56.16 4.24
104 40 45.81 4.10
113 45 37.58 3.94
122 50 30.99 3.77
131 55 25.68 3.59
140 60 21.40 3.40
149 65 17.91 3.20
158 70 15.07 3.00
167 75 12.73 2.80
176 80 10.79 2.59
185 85 9.20 2.39
Temp
(ºC)
Resistance
(K Ohms)
Voltage @
Input (VDC)
Discharge Thermistor Temperature/
Resistance
Temp
(ºF)
194 90 7.87 2.19
203 95 6.77 2.01
212 100 5.85 1.84
221 105 5.09 1.68
230 110 4.45 1.53
239 115 3.87 1.39
248 120 3.35 1.25
257 125 2.92 1.12
266 130 2.58 1.02
275 135 2.28 0.92
284 140 2.02 0.83
293 145 1.80 0.76
302 150 1.59 0.68
311 155 1.39 0.61
320 160 1.25 0.55
329 165 1.12 0.50
338 170 1.01 0.45
347 175 0.92 0.42
356 180 0.83 0.38
Temp
(ºC)
Resistance
(K Ohms)
Voltage @
Input (VDC)
Table 4, cont.: Discharge Thermistor Temperature/ Resistance
Thermistor Sensor Testing Instructions
Use the resistance column to check the thermistor sensor while disconnected from the controllers (not powered).
Use the voltage column to check sensors while connected to powered controllers. Read voltage with meter set on DC volts. Place the “-” (minus) lead on GND terminal and the “+” (plus) lead on the sensor input terminal being investigated.
If the voltage is above 4.98 VDC, then the sensor or wiring is “open.” If the voltage is less than 0.38 VDC, then the sensor or wiring is shorted.
Table 4: Discharge Thermistor Temperature/ Resistance
24
RSMD Technical Guide
TROUBLESHOOTING
Temperature Sensor Testing
Leaving Water Temperature Sensor Testing
The following sensor voltage and resistance table is provided to aid in checking sensors that appear to be operating incorrectly. Many system operating problems can be traced to incorrect sensor wiring. Be sure all sensors are wired per the wiring diagrams in this manual.
If the sensors still do not appear to be operating or reading correctly, check voltage and/or resistance to confi rm that the sensor is operating correctly per the tables. Please follow the notes and instructions that appear after the chart when checking sensors.
Temperature – Resistance – Voltage for Type
III 10 K Ohm Thermistor Sensors
Temp
(ºF)
-10 -23.33 93333 4.51
-5 -20.55 80531 4.45
0 -17.77 69822 4.37
5 -15 60552 4.29
10 -12.22 52500 4.2
15 -9.44 45902 4.1
20 -6.66 40147 4.002
25 -3.88 35165 3.891
30 -1.11 30805 3.773
35 1.66 27140 3.651
40 4.44 23874 3.522
45 7.22 21094 3.39
50 10 18655 3.252
52 11.11 17799 3.199
54 12.22 16956 3.143
56 13.33 16164 3.087
58 14.44 15385 3.029
60 15.55 14681 2.972
62 16.66 14014 2.916
64 17.77 13382 2.861
66 18.88 12758 2.802
68 20 12191 2.746
69 20.55 11906 2.717
70 21.11 11652 2.691
71 21.66 11379 2.661
72 22.22 11136 2.635
73 22.77 10878 2.605
Temp
(ºC)
Resistance
(Ohms)
Voltage @
Input (VDC)
Temperature – Resistance – Voltage for Type
III 10 K Ohm Thermistor Sensors
Temp
(ºF)
74 23.33 10625 2.576
75 23.88 10398 2.549
76 24.44 10158 2.52
77 25 10000 2.5
78 25.55 9711 2.464
80 26.66 9302 2.41
82 27.77 8893 2.354
84 28.88 8514 2.3
86 30 8153 2.246
88 31.11 7805 2.192
90 32.22 7472 2.139
95 35 6716 2.009
100 37.77 6047 1.884
105 40.55 5453 1.765
110 43.33 4923 1.65
115 46.11 4449 1.54
120 48.88 4030 1.436
125 51.66 3656 1.339
130 54.44 3317 1.246
135 57.22 3015 1.159
140 60 2743 1.077
145 62.77 2502 1.001
150 65.55 2288 0.931
Temp
(ºC)
Resistance
(Ohms)
Voltage @
Input (VDC)
Table 5, cont.: Temperature/Resistance for Type III 10K Ohm Thermistor Sensors
Thermistor Sensor Testing Instructions
Use the resistance column to check the thermistor sensor while disconnected from the controllers (not powered).
Use the voltage column to check sensors while connected to powered controllers. Read voltage with meter set on DC volts. Place the “-” (minus) lead on GND terminal and the “+” (plus) lead on the sensor input terminal being investigated.
If the voltage is above 4.88 VDC, then the sensor or wiring is “open.” If the voltage is less than 0.05 VDC, then the sensor or wiring is shorted.
Table 5: Temperature/Resistance for Type III 10K Ohm Thermistor Sensors
RSMD Technical Guide
25
Zone
TROUBLESHOOTING
Head Pressure Transducer Troubleshooting
Head Pressure Transducer Troubleshooting
If you suspect there is a problem related to the head pressure transducer, measurements can be taken at the HP1 and HP2 terminals. Reference Table 6, below.
Head Pressure Transducer Chart
Voltage Pressure Voltage Pressure
0.5 0 2.6 350
0.6 17 2.7 367
0.7 33 2.8 384
0.8 50 2.9 400
0.9 67 3.0 417
1.0 83 3.1 434
1.1 100 3.2 450
1.2 117 3.3 467
1.3 133 3.4 484
1.4 150 3.5 500
1.5 167 3.6 517
1.6 183 3.7 534
1.7 200 3.8 550
1.8 217 3.9 567
1.9 233 4.0 584
2.0 250 4.1 600
2.1 267 4.2 617
2.2 283 4.3 634
2.3 300 4.4 650
2.4 317 4.5 667
2.5 334
Zone
Table 6: Head Pressure Transducer Chart
26
RSMD Technical Guide
TROUBLESHOOTING
Notes
RSMD Technical Guide
27
APPENDIX: CONDENSER OPTIONS
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAYCONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAYOUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1DSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY
INPUTS
+5 V
+5 V
COMP DIS TEMP 1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP 2
COMP 2STATUS
GND
GND
OUTSIDE COIL TEMP / POWF EMERGENCY SHUTDOWN GND
LEAVING WATERTEMP
GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
HH COMMUNICATIONS
E-BUS
R+ SHD T-
DUAL E-BUS EXPANSION
Default: Two Condenser Operation
Two Condenser Operation
See Figure 6, below for Two Condenser Operation wiring. Refer to the fi gures on the following page for Prism 2 confi guration, Modular Service Tool Screen selection, and HVAC unit application.
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
GND
24VAC
NOTE: ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY - 1 AMP MAXIMUM LOAD
24 VAC ONLY
G5Q-1A4
OMRON
DC12V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
RLY1 RLY2 RLY3 RLY4 RLY5
COMM
UNLOAD
24 VAC
UNLOAD
COMPRESSOR 1 ENABLE COMPRESSOR 2 ENABLE CONDENSER 1 ENABLE CONDENSER 2 ENABLE
REVERSING VALVE
DIGITAL
COMPRESSOR 1
+
GND
DIGITAL
COMPRESSOR 2
+
GND
Connects To VCC-X
Loop Communications
Connector When Used
On A Split System.
Only Used When Unit
Is Controlling Digital
Compressors
Condenser
Signal 1
+
COM
Condenser
Signal 2
+
COM
Connect to
VCC-X Controller
Figure 6: Default: Two Condenser RSMD Module Wiring
28
Line Voltage
Size Transformer For Correct Total Load. RSMD = 18 VA
RSMD Technical Guide
APPENDIX: CONDENSER OPTIONS
Default: Two Condenser Operation
Figure 7: Prism 2 Condenser Confi guration
RSMD Main Confi guration Screen #2 - Condenser Options
RSMD CONFIGURATION
Condenser Options
2 Cond per RSMD
USE < or > TO CHANGE
Select the “2 Condensers for per RSMD” option on the above Hand Held Service Tool Screen.
HVAC Unit Application
The Two Condenser per RSMD confi guration is used with the following HVAC units:
• D-BOX 26-40 Ton
• C-BOX 16-20 Ton
• B-BOX
RSMD Technical Guide
29
APPENDIX: CONDENSER OPTIONS
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAYCONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAYOUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1DSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY
INPUTS
+5 V
+5 V
COMP DIS TEMP 1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP 2
COMP 2STATUS
GND
GND
OUTSIDE COIL TEMP / POWF EMERGENCY SHUTDOWN GND
LEAVING WATERTEMP
GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
HH COMMUNICATIONS
E-BUS
R+ SHD T-
DUAL E-BUS EXPANSION
Single Condenser Per Module
Single Condenser Per Module
See Figure 8, below for Single Condenser Per Module wiring. Refer to the fi gures on the following page for Prism 2 confi guration, Modular Service Tool Screen selection, and HVAC unit application.
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
GND
24VAC
NOTE: ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY - 1 AMP MAXIMUM LOAD
24 VAC ONLY
G5Q-1A4
OMRON
DC12V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
RLY2 RLY3 RLY4 RLY5
COMM
UNLOAD
24 VAC
UNLOAD
RLY1
COMPRESSOR 1 ENABLE COMPRESSOR 2 ENABLE CONDENSER 1 ENABLE NOT USED REVERSING VALVE
DIGITAL
COMPRESSOR 1
+
GND
DIGITAL
COMPRESSOR 2
+
GND
Connects To VCC-X Loop Communications Connector When Used
On A Split System.
Only Used When Unit
Is Controlling Digital
Compressors
Condenser
Signal 1
+
COM
Connect to
VCC-X Controller
Figure 8: Single Condenser Per RSMD Module Wiring
30
Line Voltage
Size Transformer For Correct Total Load. RSMD = 18 VA
RSMD Technical Guide
APPENDIX: CONDENSER OPTIONS
Single Condenser Per Module
Figure 9: Prism 2 Condenser Confi guration
RSMD Main Confi guration Screen #2 - Condenser Options
RSMD CONFIGURATION
Condenser Options 1 Cond for 1 RSMD
USE < or > TO CHANGE
Select the “1 Condenser for 1 RSMD” option on the above Hand Held Service Tool Screen.
HVAC Unit Application
The One Condenser per RSMD confi guration is used with the following HVAC units:
• B-BOX Air to Air Heat Pump
• B-BOX WSHP
• C-BOX 25-30 Ton
• C-BOX Air to Air Heat Pump
• C-BOX WSHP
RSMD Technical Guide
31
APPENDIX: CONDENSER OPTIONS
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAYCONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAYOUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1DSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY INPUTS
+5 V
+5 V
COMP DIS TEMP 1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP 2
COMP 2STATUS
GND
GND
OUTSIDE COIL TEMP / POWF EMERGENCY SHUTDOWN GND
LEAVING WATERTEMP GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
HH COMMUNICATIONS
E-BUS
R+ SHD T-
DUAL E-BUS
EXPANSION
Single Condenser Per Two Modules
Single Condenser Per 2 Modules
See Figure 10, below for Single Condenser Per 2 Modules wiring. Refer to the fi gures on the following page for Prism 2 confi guration, Modular Service Tool Screen selection, and HVAC unit application.
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
GND
24VAC
NOTE: ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY - 1 AMP MAXIMUM LOAD
24 VAC ONLY
G5Q-1A4
OMRON
DC12V
CHINA
10A250VAC~
5A30VDC
SA
VDE
RLY1 RLY2 RLY3 RLY4 RLY5
COMM
UNLOAD
24 VAC
UNLOAD
COMPRESSOR 1 ENABLE COMPRESSOR 2 ENABLE CONDENSER 1 ENABLE NOT USED REVERSING VALVE
DIGITAL
COMPRESSOR 1
+
GND
DIGITAL
COMPRESSOR 2
+
GND
Connects To VCC-X
Loop Communications
Connector When Used
On A Split System.
Not Used on 2nd Module
& 4th Module
Only Used When Unit
Is Controlling Digital
Compressors
Condenser
Signal 1
+
COM
Not Used on 2nd Module
& 4th Module
NOTE: If There Are 4 Modules, 1 & 3 Match and 2 & 4 Match.
Connect to
VCC-X Controller
32
Figure 10: Single Condenser Per 2 RSMD Modules Wiring
Line Voltage
Size Transformer For Correct Total Load. RSMD = 18 VA
RSMD Technical Guide
APPENDIX: CONDENSER OPTIONS
Single Condenser Per Two Modules
Figure 11: Prism 2 Condenser Confi guration
RSMD Main Confi guration Screen #2 - Condenser Options
RSMD CONFIGURATION
Condenser Options
1 Cond for 2 RSMDs
USE < or > TO CHANGE
Select the “1 Condenser for 2 RSMDs” option on the above Hand Held Service Tool Screen.
HVAC Unit Application
The One Condenser per Two RSMDs confi guration is used with the following HVAC units:
• RLA BOX
• RLB BOX
• RLE BOX
RSMD Technical Guide
33
APPENDIX: CONDENSER OPTIONS
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAYCONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAYOUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1DSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY INPUTS
+5 V
+5 V
COMP DIS TEMP 1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP 2
COMP 2STATUS
GND
GND
OUTSIDE COIL TEMP / POWF EMERGENCY SHUTDOWN GND
LEAVING WATERTEMP GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
HH COMMUNICATIONS
E-BUS
R+ SHD T-
DUAL E-BUS
EXPANSION
Single Condenser For Three Modules
Single Condenser for 3 Modules
See Figure 12, below for Single Condenser for 3 Modules wiring. Refer to the fi gures on the following page for Prism2 confi guration, Modular Service Tool Screen selection, and HVAC unit application.
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
GND
24VAC
NOTE: ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY - 1 AMP MAXIMUM LOAD
24 VAC ONLY
G5Q-1A4
OMRON
DC12V
CHINA
10A250VAC~
5A30VDC
SA
VDE
RLY1 RLY2 RLY3 RLY4 RLY5
COMM
UNLOAD
24 VAC
UNLOAD
COMPRESSOR 1 ENABLE
COMPRESSOR 2 ENABLE CONDENSER 1 ENABLE NOT USED REVERSING VALVE
DIGITAL
COMPRESSOR 1
+
GND
DIGITAL
COMPRESSOR 2
+
GND
Connects To VCC-X Loop Communications Connector When Used
On A Split System.
Only Used on 1st Module.
Not Used on 2nd & 3rd.
Only Used When Unit
Is Controlling Digital
Compressors
Condenser
Signal 1
+
COM
Only Used on 1st Module.
Not Used on 2nd & 3rd.
Connect to
VCC-X Controller
Figure 12: Single Condenser for 3 RSMD Modules Wiring
34
Line Voltage
Size Transformer For Correct Total Load. RSMD = 18 VA
RSMD Technical Guide
APPENDIX: CONDENSER OPTIONS
Single Condenser For Three Modules
Figure 13: Prism 2 Condenser Confi guration
RSMD Main Confi guration Screen #2 - Condenser Options
RSMD CONFIGURATION
Condenser Options
1 Cond for 3 RSMDs
USE < or > TO CHANGE
Select the “1 Condenser for 3 RSMDs” option on the above Hand Held Service Tool Screen.
HVAC Unit Application
The One Condenser per Three RSMDs confi guration is used with the following HVAC units:
• RLC BOX
• RLD BOX
RSMD Technical Guide
35
APPENDIX: CONDENSER OPTIONS
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAYCONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAYOUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1DSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY
INPUTS
+5 V
+5 V
COMP DIS TEMP 1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP 2
COMP 2STATUS
GND
GND
OUTSIDE COIL TEMP / POWF EMERGENCY SHUTDOWN GND
LEAVING WATERTEMP
GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
HH COMMUNICATIONS
E-BUS
R+ SHD T-
DUAL E-BUS EXPANSION
Two Condensers Per Two Modules
A1/B1 and A2/B2 Condenser Fans
See Figure 14, below and Figure 15 on the facing page for Two Condensers for 2 Modules wiring. Refer to the fi gures on page 38 for Prism 2 confi guration, Modular Service Tool Screen selection, and HVAC unit application.
OE370-26-RSMD
A1 / B1
Address 1
GND
24VAC
NOTE: ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY - 1 AMP MAXIMUM LOAD
24 VAC ONLY
G5Q-1A4
OMRON
DC12V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
RLY1 RLY2 RLY3 RLY4 RLY5
COMM
UNLOAD
24 VAC
UNLOAD
COMPRESSOR A1 ENABLE COMPRESSOR A2 ENABLE CONDENSER A1 / B1 ENABLE CONDENSER A2 / B2 ENABLE
REVERSING VALVE A1 / B1
DIGITAL
COMPRESSOR 1
+
GND
DIGITAL
COMPRESSOR 2
+
GND
Connects To VCC-X Loop Communications Connector When Used
On A Split System.
Only Used When Unit
Is Controlling Digital
Compressors
Condenser
Signal A1 / B1
+
COM
Condenser
Signal A2 / B2
+
COM
Connect to
VCC-X Controller
Figure 14: A1/ B1 Wiring
36
Line Voltage
Size Transformer For Correct Total Load. RSMD = 18 VA
RSMD Technical Guide
APPENDIX: CONDENSER OPTIONS
M
ENTER
UP
DOWN
ALARM
MENU
OE370-26-RSMD
RSM FOR DIGITAL
COMPRESSORS
AAON No.: V61520
+24 VAC
GND
RELAYCONTACT RATING IS 1AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1 COMP 2
ANALOG OUTPUTS
REVERSING VALVE
COMMON
RELAYOUTPUT
TERMINALS
www.aaon.com
WattMaster Overlay # 000072 Rev1DSW
CONDENSER 1 CONDENSER 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
SUCTION
PRESSURE 1
SENSOR
HEAD
PRESSURE 1
SENSOR
TEMP
SENSORS
BINARY INPUTS
+5 V
+5 V
COMP DIS TEMP 1
COMP STATUS 1
SP-1
HP-1
COMP DIS TEMP 2
COMP 2STATUS
GND
GND
OUTSIDE COIL TEMP / POWF EMERGENCY SHUTDOWN GND
LEAVING WATERTEMP GND
SUCTION
PRESSURE 2
SENSOR
HEAD
PRESSURE 2
SENSOR
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
HH COMMUNICATIONS
E-BUS
R+ SHD T-
DUAL E-BUS EXPANSION
Two Condensers Per Two Modules
OE370-26-RSMD
A2 / B2
Address 2
GND
24VAC
NOTE: ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY - 1 AMP MAXIMUM LOAD
24 VAC ONLY
G5Q-1A4
OMRON
DC12V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
RLY2 RLY3 RLY4 RLY5
COMM
UNLOAD
24 VAC
UNLOAD
RLY1
COMPRESSOR B1 ENABLE COMPRESSOR B2 ENABLE NOT USED NOT USED REVERSING VALVE A2 / B2
DIGITAL
COMPRESSOR B1
+
GND
DIGITAL
COMPRESSOR B2
+
GND
Connects To VCC-X Loop Communications Connector When Used
On A Split System.
Only Used When Unit
Is Controlling Digital
Compressors
Connect to
VCC-X Controller
Figure 15: A2 / B2 Wiring
RSMD Technical Guide
Line Voltage
Size Transformer For Correct Total Load. RSMD = 18 VA
37
APPENDIX: CONDENSER OPTIONS
Two Condensers Per Two Modules
Figure 16: Prism 2 Condenser Confi guration
RSMD Main Confi guration Screen #2 - Condenser Options
RSMD CONFIGURATION
Condenser Options
2 Cond for 2 RSMDs
USE < or > TO CHANGE
Select the “2 Condensers for 2 RSMDs” option on the above Hand Held Service Tool Screen.
HVAC Unit Application
The Two Condensers per Two RSMDs confi guration is used with the following HVAC units:
• D-BOX 50-70 Ton
• D-BOX Air to Air Heat Pump
• D-BOX WSHP
38
RSMD Technical Guide
APPENDIX: CONDENSER OPTIONS
ON/OFF Condenser Options
Select this option to have the Condenser Fan turn On/Off with the Compressors. This can also be selected when No Head Pressure Control is required.
RSMD Technical Guide
Select this option if the Condenser Fan cycles On/Off based on the Fan Cycle Head Pressure Setpoints.
39
2425 So. Yukon Ave • Tulsa, OK • 74107-2728
Ph: (918) 583-2266 • Fax: (918) 583-6094
AAON® Part No.: V87380
WM Form: AA-RSMD-TGD-01D
Printed in the USA • Copyright April 2018 • All Rights Reserved
AAON/WattMaster Controls, Inc. • 8500 NW River Park Drive • Parkville, MO • 64152
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