Product Manual

ERM5220R EQUIPMENT REMOTE MODULE
9 33-00205—01
Fig. 11. Heatpump.
J
R
C
Y
Y2
T
DL
S1
S1
O/B
T
Y
HEATPUMP
C
Y2
L2
L1
C
R
1
2
3
4
O D
5
6
8
R
Y
C
G
W
R
AIR HANDLER OR FURNACE
OR
Y
C
G
O
W
R
Y
C
Y2
W
AUX/E
Rc
R
O/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
C
Y2
W
AUX/E
Rc
R
O/B
G
W2
8
9
10
11