Honeywell REDLINK ERM5220R Operation manual

PRODUCT DATA
33-00205-01
ERM5220R
Equipment Remote Module
WITH REDLINK™ WIRELESS TECHNOLOGY
CAUTION
Read these installation instructions completely
and follow them carefully.
Installation must be performed by a qualified
service technician and must comply with local
codes.
Disconnect power to all relevant devices before
installing or servicing the ERM.
Failure to connect the device according to these
instructions may result in damage to the device,
the controls, and/or personal injury.
About the ERM5220R
Fig. 1.
FEATURES
• Wireless RedLink™ communication between
condensing unit/compressor or boiler and thermostat.
• Eliminates the need to run additional wires to your
outdoor condenser, multistage compressor, heat pump
or dual fuel applications, or if original wiring has been
damaged, or equipment has been relocated.
• Suitable for outdoor use.
• Temperature sensor terminals for outdoor temp
sensors or indoor freeze protection.
• LEDs for easy installation checkout.
• May reduce damage to homes since wiring/drilling is
eliminated.
MCR35654
ERM
WIRE
CONDENSING
UNIT
THERMOSTAT
ERM
BOILER
Contents
Specifications ............................................................................... 2
Compatible Products ................................................................. 3
Model Numbers ........................................................................... 3
Buttons, LEDs and Terminals ................................................. 4
Terminal Designations .............................................................. 5
Installation Checklist ................................................................. 6
Mounting ERM ............................................................................. 6
Installation and Wiring ......................................................... 7-13
Linking ERM to a new thermostat. ....................................... 14
Linking ERM to an existing thermostat. ............................ 16
Checkout ......................................................................................... 18
Operation ........................................................................................ 19
Troubleshooting ........................................................................... 20
Frequently Asked Questions ................................................... 27
Outdoor Sensor ............................................................................ 28
5 Year Warranty ............................................................................ 30

ERM5220R EQUIPMENT REMOTE MODULE
33-00205—01 2
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number. If you have additional questions, need further
information, or would like to comment on our products or services, please write or phone:
1. Your local Honeywell Environmental and Combustion Controls Sales Office (check white pages of your phone
directory).
2. Honeywell Customer Care
1985 Douglas Drive North
Minneapolis, Minnesota 55422-4386
3. http://customer.honeywell.com or http://customer.honeywell.ca
International Sales and Service Offices in all principal cities of the world. Manufacturing in Belgium, Canada, China,
Czech Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States.
SPECIFICATIONS
Operating Ambient Temperature Range:
Compressor: -40 to +155 ºF (-40 to +68 ºC)
Boiler: 30 to +130 ºF (-1 to +54 ºC)
Operating Relative Humidity Range: 0 - 99 %
Electrical: 24 VAC, 50/60 Hz.
Dimensions: 175 mm x 168 mm x 38 mm
Wireless capability via RedLINK™ technology.
Frequency: 902 - 928 MHZ (This is a "jumping
frequency". It jumps within the bands to reduce
interference from other RF devices). Certified under the
Federal Communication Commission (FCC) part
15.247.
Cover screw: #10-24 UNC 3/8 Phillips pan head
machine screw.
Fig. 2. Dimensions.
FCC REGULATIONS
§ 15.19 (A)(3)
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. this device must accept any interference received, including interference that may cause undesired operation.
FCC WARNING
§ 15.21 (USA ONLY)
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority
to operate the equipment.
IC REGULATIONS
RSS-GEN
This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject to the following two conditions:
1. This device may not cause interference; and
2. This device must accept any interference, including interference that may cause undesired operation of the device.
M35664
6-7/8 (175)
6-39/64
(168)
1-31/64
(38)

ERM5220R EQUIPMENT REMOTE MODULE
333-00205—01
COMPATIBLE PRODUCTS
NOTE: The ERM5220R may only be used with the thermostats listed below. Look for this
image on these products.
If you no longer have the thermostat or EIM packaging, verify thermostat model and manu-
facture date are compatible with ERM. The date code of thermostat (and EIM, if used) must
be 1546 or above (more recent). Compatible models of thermostat and EIM are listed in
Tables 1 and 2. If your thermostat pre-dates ERM compatibility, see the info on Older Models,
below .
* Date code of thermostat (and EIM if used) needs to be 1546 or more recent (larger number).
Older Models
If the EIM/thermostat date code is smaller (older) than 1546:
• 2.0 or later versions of Prestige IAQ and RedLINK Vision-PRO thermostats can be used if you update the software on the
thermostat.
• The software update page is https://thermostatsetup.honeywell.com/en-US/SoftwareUpdates/Pages/default.aspx
This page has updates for both Prestige IAQ and RedLINK VisionPRO. Prestige is updated via USB stick; VisionPRO is
updated via microSD card.
• Prestige 1.0 models can not be updated.
• The EIM (if used) can not be updated and must be replaced.
NOTES:
— Only two ERMs can be enrolled in a system at one time – one in Boiler mode and one in Compressor mode.
— ERM is not supported by systems using a forced air zone panel, even if the thermostat is wired to the zone panel
or linked to an EIM. (See the FAQ on page 27 for more on this).
— For Boiler applications, the thermostat must be configured for radiant heat.
— ERM will not support series 20 operation in boiler applications unless a relay is used (page 12). When
configured for radiant heat the Y relay shall be off at all times.
— Prestige IAQ always requires a THM5421R EIM. The ERM can be used in conjunction with the EIM for forced air
systems. The ERM would not be used with a Prestige IAQ on heat only systems without fan.
Table 1. ERM (equipment remote module) and kits including the ERM.
ERM5220R1018 Equipment Remote Module (ERM)
YERM5220R8321 Kit with THM5220R1018 ERM and RedLINK-enabled TH8321R1001 VisionPRO thermostat
YERM5220RVPEIM Kit with THM5220R1018 ERM (Equipment Remote Module), RedLINK-enabled TH8321R1001
VisionPRO thermostat and THM5421R1021 EIM (Equipment Interface Module)
Table 2. Compatible models.
VisionPRO Redlink
thermostats numbers Prestige thermostat and thermostat kit numbers EIM and EIM kit numbers
TH8110R1008* Thermostat THX9421R5021* Thermostat THM5421R1021* EIM
TH8320R1003* Thermostat YTHX9421R5085* Thermostat + EIM + Delta-T sensors
TH8321R1001* Thermostat YTHX9421R5101* Thermostat + EIM +
Wireless outdoor sensor + Delta-T sensors
YTHM5421R1010* EIM +
Delta-T sensors
Table 3. Other accessories.
Model Note
C7189U1005 10K ohm indoor sensor used as a backup on boiler applications.
If the stat fails for more than 30 minutes , it will maintain the system at 55 °F in heating.
C7089U1006 10K ohm outdoor sensor used with outdoor unit ERM5220R installations to display outdoor
temperature at thermostat.
C7089R1013 Wireless outdoor sensor
THM6000R1002 RedLINK Internet Gateway (RIG)
REM5000R1001 Portable comfort control

ERM5220R EQUIPMENT REMOTE MODULE
33-00205—01 4
BUTTONS, LEDS AND TERMINALS
Fig. 3.
JRCYY2
TDLS1 S1
O/B
T
Equipment Remote Module − Model: ERM5220R
Connect
TAB FOR COVER SCREW: (#10-24 UNC 3/8
PHILLIPS PAN HEAD MACHINE SCREW.) M36109
WIRING CHANNELS
DRAIN HOLES FOR WATER
MOUNTING TABS: SCREW ERM TO WALL
BY OUTDOOR UNIT OR BY BOILER.
SEE PAGE 6.
WIRING TERMINAL SCREWS: SEE TERMINAL
FUNCTIONS ON PAGE 5 AND FIGURES 10-15.
LEDS:
• Y LED INDICATES THE ERM IS CALLING FOR
STAGE 1 COMPRESSOR
• Y2/T LED INDICATES A CALL FOR STAGE 2
COMPRESSOR (THIS LED IS NOT ILLUMINATED
WITH A CALL FOR BOILER HEAT).
• O/B-T LED INDICATES A CALL FOR CHANGEOVER
VALVE WHEN ERM IS CONFIGURED FOR
COMPRESSOR, IT INDICATES A HEAT CALL WHEN
ERM IS CONFIGURED FOR BOILER.
• D LED INDICATES TERMINAL ENERGIZED BY THE
HEATPUMP DEFROST BOARD.
• L LED INDICATES TERMINAL ENERGIZED BY THE
SYSTEMS COMPRESSOR FAULT MONITOR.
LEDS:
COMPRESSOR: LIT WHEN R TO J JUMPER IS CONNECTED FOR CONTROLLING AN OUTDOOR UNIT.
BOILER: LIT WHEN R TO J JUMPER IS REMOVED FOR CONTROLLING A BOILER.
CONNECTION: FLASHING GREEN WHILE CONNECTING TO THERMOSTAT.
SOLID GREEN ONCE SUCCESSFULLY CONNECTED.
SOLID RED FOR UNSUCCESSFUL CONNECTION OR LOSS OF COMMUNICATION TO THERMOSTAT.
CONNECT BUTTON: PRESS/RELEASE ONE TIME TO LINK TO A COMPATIBLE RedLINK THERMOSTAT WHILE THERMOSTAT IS IN
THE “ADD DEVICE” MODE. PRESS/HOLD TO UNLINK THE ERM5220R FROM THE THERMOSTAT IT HAS PREVIOUSLY BEEN LINKED
TO. WHILE HOLDING THE BUTTON THE LED SHOULD GO OUT, THEN TURN SOLID RED, THEN GO OUT AGAIN.
Compressor
Boiler
Connection
Status Key:
Flashing Green Connecting
Green Connected
Red Not Communicating
For Compressor:
Jumper uses J and R
For Boiler:
Remove jumper

ERM5220R EQUIPMENT REMOTE MODULE
533-00205—01
Fig. 4. Terminal Designations for Compressor. Fig. 5. Terminal Designations for Boiler.
1
THE “D” TERMINAL OPERATES AS AN INPUT FOR DEFROST. ACTIVE
INPUT ON “D” TERMINAL AT ERM WILL TELL THE THERMOSTAT TO
POWER THE AUX (OR AUX 1) TERMINAL AT THE SUBBASE OR EIM. IF
“D” TO AUX IS NOT DESIRED, DO NOT CONNECT “D” TERMINAL TO THE
ERM5220R IS CONFIGURED FOR USE WITH A COMPRESSOR.
TERMINAL DESIGNATIONS FOR COMPRESSOR
TERMINALS FOR 10K OHM TEMPERATURE SENSOR. CAN BE USED
TO SENSE OUTDOOR TEMPERATURE WHICH WILL BE DISPLAYED
ON A COMPATIBLE RedLINK THERMOSTAT.
COMPRESSOR LINE FAULT TERMINAL. FAULT OCCURRENCE WILL
BE COMMUNICATED TO COMPATIBLE RedLINK THERMOSTAT.
COMPRESSOR DEFROST TERMINAL. DEFROST OCCURRENCE WILL
BE COMMUNICATED TO COMPATIBLE RedLINK THERMOSTAT.
THERMOSTAT WILL ENGERGIZE AUX OR AUX1 WHEN THIS OCCURS.
1
M36110
O/B TERMINAL FOR REVERSING VALVE ON HEATPUMP.
SECOND STAGE OF TWO STAGE COMPRESSOR.
FIRST STAGE OF COMPRESSOR.
TERMINALS FOR 24VAC POWER.
TERMINAL FOR JUMPER. JUMPER BETWEEN J AND R SHOULD
BE IN PLACE FOR COMPRESSOR USE.
JRCYDLS1 S1
O/B
T
Y2
T
JRCYO/B
TDLS1 S1
TERMINALS FOR 10K OHM TEMPERATURE SENSOR. CAN BE USED
FOR FREEZE PROTECTION IN THE CASE OF THE THERMOSTAT
LOSING THE SIGNAL TO THE ERM. SENSOR MUST REMAIN INDOORS
TO BE USED FOR FREEZE PROTECTION.
DRY CONTACT TERMINAL FOR HEAT CALL.
TERMINALS FOR 24VAC POWER.
TERMINAL FOR JUMPER. JUMPER BETWEEN J AND R SHOULD
BE REMOVED FOR BOILER USE.
TERMINAL DESIGNATIONS FOR BOILER
Y2
T
DRY CONTACT TERMINAL FOR HEAT CALL.
ERM WILL NOT SUPPORT SERIES 20 OPERATION UNLESS A RELAY IS ADDED
(SEE FIGURE 14). WHEN CONFIGURED TO A BOILER, THE Y RELAY SHALL BE
DE-ENERGIZED AT ALL TIMES.
1
M36111
1

ERM5220R EQUIPMENT REMOTE MODULE
33-00205—01 6
Installation Checklist
MATERIALS SUPPLIED:
• ERM5220R
• Wall Anchors (x2) and Mounting Screws (x2)
• Extra Cover Screw (optional)
• Installation Instructions (33-00135EFS)
TOOLS NEEDED (NOT SUPPLIED):
• Drill
• Nut Driver Attachment for Drill
• Wire Stripper
• Small Flathead Screwdriver
• Phillips Screwdriver
• 120/240 V to 24 V Transformer (Furnace or Air-handler
transformer can be used if 2 wires are available to
outdoor unit)
Mounting ERM
3. Use two screws and wall anchors to attach the ERM to the exterior wall near the compressor. The location should be
at least 3 feet above ground and oriented with the two wire exits facing downward. See Figs. 6 and 7.
4. Attach cover and secure with bottom screw (Fig. 8).
Fig. 6. Mounting orientation.
Fig. 7. If mounting on lap siding,
allow space for the cover to be removed.
Fig. 8. Secure front cover.
M35671
INSTALL GUIDE
33-00135EFS-03
ERM5220R
Equipment Remote Module
WITH REDLINK™ WIRELESS TECHNOLOGY
Table of Contents
About the ERM5220R 2
Installation Checklist 3
Terminal Designations 4
Installation 6
Checkout 12
Troubleshooting 14
Specifications 16
5 YearWarranty 18
CAUTION
Read these installation instructions completely and follow them
carefully.
Installation must be performed by a qualified service technician and
must comply with local codes.
Disconnect power to all relevant devices before installing or
servicing the ERM.
Failure to connect the device according to these instructions may
result in damage to the device, the controls, and/or personal injury.
M35669 M35672
M35670
MCR35665
MOUNTING
SCREWS
CORRECT
Equipment Remote Module I ERM5000R
Compressor
Boiler
Connected
Connect
CONNECTED LED STATUS
Flashing: Device Connecting
Green: Device Connected
Red: Not Communicating
Compressor:
Jump J and R
Boiler:
Remove Jumper
JRC
Y1
Y2
TO/B
T
DL
S1 S1
INCORRECTINCORRECT
Equipment Remote Module I ERM5000R
Compressor
Boiler
Connected
Connect
CONNECTED LED STATUS Flashing: Device Connecting Green: Device Connected Red: Not Communicating
Compressor:
Jump J and R
Boiler:
Remove Jumper
JRC
Y1
Y2
TO/B
T
DL
S1 S1
Equipment Remote Module I ERM5000R
Compressor
Boiler
Connected
Connect
CONNECTED LED STATUS
Flashing: Device Connecting
Green: Device Connected
Red: Not Communicating
Compressor:
Jump J and R
Boiler:
Remove Jumper
JRC
Y1
Y2
TO/B
T
DL
S1 S1
M35666
MINIMUM
1/4 INCH GAP
M35667

ERM5220R EQUIPMENT REMOTE MODULE
733-00205—01
INSTALLATION
IMPORTANT
• The ERM is not compatible with forced air zone boards (see the FAQ on page 27 for details).
• To ensure that the ERM will receive a wireless signal at the desired installation location:
(a) Do not mount the ERM in a metal box. This would impede the RedLINK wireless signal.
(b) If your location has metal siding, the ERM’s signal may be affected. If there is no communication or poor sig-
nal strength, consider a different location.
(c) If there is a lot of concrete materials between the ERM and host (thermostat or EIM), the ERM’s signal may
be affected. If there is no communication or poor signal strength, consider a different location.
• A Prestige (with EIM) or VisionPRO (with or without EIM) will only allow one of the following configurations:
1) Enrolled with a single boiler configured ERM;
2) Enrolled with a single compressor configured ERM;
3) Enrolled with a single boiler configured ERM and enrolled with a single compressor configured ERM.
Wiring
1. Make sure power to compressor/boiler is off.
2. Remove the front cover by loosening the cover screw and lifting up from the bottom of the ERM.
3. Remove 3 to 4 inches of the cable’s outer sheathing, then remove 3/8 to 1/2 inch of insulation from each wire.
4. See Figures 10–15 for R to J jumper setting and wiring.
Fig. 9. Cable prepared for wiring.
M35674

ERM5220R EQUIPMENT REMOTE MODULE
33-00205—01 8
WIRING DIAGRAMS
Fig. 10. Compressor for conventional application.
JRCYY2
TDLS1 S1
O/B
T
Y
OUTDOOR UNIT
CY2
L2
L1
C
R
LOW VOLTAGE
TRANSFORMER
WIRE TRANSFORMER PRIMARY TO APPROPRIATE 120, 208, OR 240 VOLTAGE POWER SUPPLY AT OUTDOOR UNIT. TRANSFORMER NOT
NECESSARY IF THERE ARE TWO WIRES AVAILABLE FROM R AND C ON INDOOR UNIT TO R AND C ON ERM. FOLLOW TRANSFORMER INSTALL
GUIDE FOR WIRING OF TRANSFORMER PRIMARY.
WIRE TRANSFORMER LOW VOLTAGE SECONDARY (R AND C) TO ERM5220R AS SHOWN.
VEFIFY TRANSFORMER IS SIZED CORRECTLY TO HANDLE THE LOAD OF THE OUTDOOR UNIT (Y AND Y2).
ADD A JUMPER WIRE FROM J TO R.
Y2 IS NOT USED ON SINGLE STAGE EQUIPMENT.
OUTDOOR SENSOR IS OPTIONAL. IF USED ON THIS APPLICATION IT ALLOWS THE OUTDOOR TEMPERATURE READING TO BE DISPLAYED ON
THE THERMOSTAT. ALTERNATELY THE C7089R1013 WIRELESS OUTDOOR SENSOR CAN BE USED.
IF A COMPATIBLE TH8000 SERIES RedLINK THERMOSTAT IS USED, AND THE THERMOSTAT IS ALSO WIRELESS TO THE INDOOR UNIT, AN EIM
(EQUIPMENT INTERFACE MODULE) IS REQUIRED IN ADDITION TO THE ERM (EQUIPMENT REMOTE MODULE). THE COMPATIBLE PRESTIGE IAQ
THERMOSTAT ALWAYS NEEDS TO BE PAIRED WITH AN EIM.
1
2
3
4
5
6
FURNACE
Y
CG
WW2
R
Y
CY2
W
AUX/E
Rc
RO/B G
W2
7
M36120
ERM5220R
1
FOR COMPRESSOR:
JUMPER USES J AND R
C7089U1006 WIRED
OUTDOOR SENSOR (OPTIONAL)
CONVENTIONAL SYSTEM
THERMOSTAT SUBBASE (OR EIM)
2
3
4
5
6
7

ERM5220R EQUIPMENT REMOTE MODULE
933-00205—01
Fig. 11. Heatpump.
JRCYY2
TDL S1 S1
O/B
T
Y
HEATPUMP
CY2
L2
L1
C
R
1
2
3
4
O D
568
R
Y
CGW
R
AIR HANDLER OR FURNACE
OR
Y
CG
OW
R
Y
CY2
W
AUX/E
Rc
RO/B G
W2
6
L
11
10
9
7
WIRE TRANSFORMER PRIMARY TO APPROPRIATE 120, 208, OR 240 VOLTAGE POWER SUPPLY AT OUTDOOR UNIT. TRANSFORMER NOT
NECESSARY IF THERE ARE TWO WIRES AVAILABLE FROM R AND C ON INDOOR UNIT TO R AND C ON ERM. FOLLOW TRANSFORMER INSTALL
GUIDE FOR WIRING OF TRANSFORMER PRIMARY.
WIRE TRANSFORMER LOW VOLTAGE SECONDARY (R AND C) TO ERM5220R AS SHOWN.
VEFIFY TRANSFORMER IS SIZED CORRECTLY TO HANDLE THE LOAD OF THE OUTDOOR UNIT (Y AND Y2).
ADD A JUMPER WIRE FROM J TO R.
Y2 IS NOT USED ON SINGLE STAGE EQUIPMENT.
RHEEM AND RUUD HEATPUMPS USE B INSTEAD OF O.
DEFROST WIRE CONNECTS TO D AT ERM52220R. CHECK WITH HEATPUMP LITEATURE TO SEE HOW THEY LABEL THIS TERMINAL. THE “D”
TERMINAL OPERATES AS AN INPUT FOR DEFROST. ACTIVE INPUT ON “D” TERMINAL AT ERM WILL COMMUNICATE WITH THERMOSTAT TO
POWER THE AUX OF (AUX1) TERMINAL AT THE THERMOSTAT SUBBASE OR EIM. IF “D” TO AUX IS NOT DESIRED, DO NOT CONNECT “D”
TERMINAL TO THE ERM5220R. THIS FEATURE IS ONLY ACTIVE WHEN THE ERM5220R IS CONFIGURED FOR USE WITH A COMPRESSOR.
IF THE HEATPUMP DOES NOT HAVE A CONNECTION FOR A COMPRESSOR MONITOR, DO NOT CONNECT L.
OUTDOOR SENSOR IS OPTIONAL ON ELECTRIC BACKUP APPLICATIONS. FOR DUAL FUEL, THE OUTDOOR SENSOR IS REQUIRED.
ALTERNATELY THE C7089R1013 WIRELESS OUTDOOR SENSOR CAN BE USED.
THE AUXILIARY/EMERGENCY HEAT TERMINAL LABELING VARIES BY AIR-HANDLER OEM.
IF A COMPATIBLE TH8000 SERIES RedLINK THERMOSTAT IS USED, AND THAT THERMOSTAT IS ALSO WIRELESS TO THE INDOOR UNIT, AN EIM
(EQUIPMENT INTERFACE MODULE) IS REQUIRED IN ADDITION TO THE ERM (EQUIPMENT REMOTE MODULE). THE COMPATIBLE PRESTIGE IAQ
THERMOSTAT ALWAYS NEEDS TO BE PAIRED WITH AN EIM.
M36121
1
2
3
4
5
6
7
ERM5220R
LOW VOLTAGE
TRANSFORMER
FOR COMPRESSOR:
JUMPER USES J AND R
C7089U1006 WIRED
OUTDOOR SENSOR (OPTIONAL)
HEATPUMP WITH ELECTRIC BACKUP
THERMOSTAT SUBBASE (OR EIM)
DUAL FUEL
11
THERMOSTAT SUBBASE (OR EIM)
FURNACE
Y
CY2
W
AUX/E
Rc
RO/B G
W2
8
9
10
11

ERM5220R EQUIPMENT REMOTE MODULE
33-00205—01 10
Fig. 12. Boiler with a single zone.
JRCYY2
TDLS1 S1
O/B
T
T (W)
T (R)
L2
L1
C
R
1
2
3
4
Y
CG Y2
R
Y
CY2
Rc
RG
5 6
WIRE TRANSFORMER PRIMARY TO APPROPRIATE 120, 208, OR 240 VOLTAGE POWER SUPPLY. FOLLOW TRANSFORMER INSTALL GUIDE FOR WIRING
OF TRANSFORMER PRIMARY.
WIRE TRANSFORMER LOW VOLTAGE SECONDARY (R AND C) TO ERM5220R AS SHOWN.
REMOVE JUMPER WIRE FROM J TO R.
INDOOR SENSOR IS OPTIONAL. IF USED ON THIS APPLICATION IT ALLOWS THE ERM TO DO FREEZE PROTECTION CONTROL IF COMMUNICATION IS
LOST WITH THE THERMOSTAT.
IF A COMPATIBLE TH8000 SERIES RedLINK THERMOSTAT IS USED, AND THAT THERMOSTAT IS ALSO WIRELESS TO THE INDOOR UNIT, AN EIM
(EQUIPMENT INTERFACE MODULE) IS REQUIRED IN ADDITION TO THE ERM (EQUIPMENT REMOTE MODULE). THE COMPATIBLE PRESTIGE IAQ
THERMOSTAT ALWAYS NEEDS TO BE PAIRED WITH AN EIM, EVEN ON A HEAT ONLY SYSTEM. BECAUSE OF THIS, IT WOULD BE UNUSUAL TO USE
THE ERM5220R WITH A PRESTIGE IAQ THERMOSTAT ON A HOT WATER HEAT ONLY SYSTEM WITHOUT FAN.
FOR HYDROAIR (HOT WATER COIL) APPLICATIONS, MAKE SURE TO CONFIGURE THE THERMOSTAT TO ENERGIZE THE FAN IN HEAT MODE.
M36125
1
2
3
4
5
6
ERM5220R
FOR BOILER:
REMOVE JUMPER FROM R TO J
LOW VOLTAGE
TRANSFORMER
BOILER AQUASTAT
C7189U1005 WIRED INDOOR
SENSOR (OPTIONAL)
AIR HANDLER
THERMOSTAT SUBBASE (OR EIM)
WIRING AT THERMOSTAT IF CUSTOMER ALSO HAS FORCED AIR COOLING OR A HYDRO-AIR APPLICATION (NOT REQUIRED ON HEAT ONLY APPLICATIONS)