Fig. 15. Hot water relay panel.
J
R
C
Y
Y2
T
DL
S1
S1
O/B
T
T(W)
T(R)
L2
L1
C
R
1
2
3
4
Y
C
G
Y2
R
Y
C
Y2
Rc
R
G
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.
M36128
1
2
3
4
5
6
ERM5220R
FOR BOILER:
REMOVE JUMPER FROM R TO J
LOW VOLTAGE
TRANSFORMER
HOT WATER RELAY PANEL
C7189U1005 WIRED INDOOR
SENSOR (OPTIONAL)
AIR HANDLER
THERMOSTAT SUBBASE (OR EIM)
ZONE 1
T(W)
T(R)
ZONE 2
T(W)
T(R)
ZONE 3
WIRING AT THERMOSTAT IF CUSTOMER ALSO HAS FORCED AIR COOLING OR A HYDRO-AIR APPLICATION (NOT REQUIRED ON HEAT ONLY APPLICATIONS)
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