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FOR BOILER:
REMOVE JUMPER FROM R TO J
2
R
LOW VOLTAGE
TRANSFORMER
1
L1
WIRING AT THERMOSTAT IF CUSTOMER ALSO HAS FORCED AIR COOLING OR A HYDRO-AIR APPLICATION (NOT REQUIRED ON HEAT ONLY APPLICATIONS)
THERMOSTAT SUBBASE (OR EIM)
R
Rc
1
WIRE TRANSFORMER PRIMARY TO APPROPRIATE 120, 208, OR 240 VOLTAGE POWER SUPPLY. FOLLOW TRANSFORMER INSTALL GUIDE FOR WIRING
OF TRANSFORMER PRIMARY.
2
WIRE TRANSFORMER LOW VOLTAGE SECONDARY (R AND C) TO ERM5220R AS SHOWN.
3
REMOVE JUMPER WIRE FROM J TO R. ADD JUMPER FROM R TO ONE OF THE T TERMINALS ON ERM AS SHOWN.
4
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.
5
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.
6
FOR HYDROAIR (HOT WATER COIL) APPLICATIONS, MAKE SURE TO CONFIGURE THE THERMOSTAT TO ENERGIZE THE FAN IN HEAT MODE.
Y 2
J
R
C
Y
3
C
L2
END-SWITCH
T (R)
BOILER AQUASTAT
5
6
C
Y
Y2
G
R
C
Y
Y2
G
AIR HANDLER
Fig. 13. Power-open/spring closed zone valve.
11
ERM5220R EQUIPMENT REMOTE MODULE
ERM5220R
O /B
D
L
S 1
S 1
T
T
TH
TR
HONEYWELL VALVE
WITH END-SWITCH
PICTURED
T (W)
C7189U1005 WIRED INDOOR
SENSOR (OPTIONAL)
4
M36126
33-00205—01
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