Product Manual

ERM5220R EQUIPMENT REMOTE MODULE
33-00205—01 8
WIRING DIAGRAMS
Fig. 10. Compressor for conventional application.
J
R
C
Y
Y2
T
DL
S1
S1
O/B
T
Y
OUTDOOR UNIT
C
Y2
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
C
G
W
W2
R
Y
C
Y2
W
AUX/E
Rc
R
O/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