Fig. 14. Series 20, Power-open/power closed zone valve.
L2
L1
C
R
1
2
4
6
1
2
3
6
4
5
3
1
2
7
5
Y
C
G
Y2
R
Y
C
Y2
Rc
R
G
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. ADD JUMPER FROM R TO ONE OF THE T TERMINALS ON ERM AS SHOWN.
ERM DOES NOT USE Y FOR HOT WATER VALVE. HONEYWELL R8222B1067 OR EQUIVALENT ISOLATION RELAY REQUIRED.
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.
1
2
3
4
5
6
C7189U1005 WIRED INDOOR
SENSOR (OPTIONAL)
AIR HANDLER
M36127
J
R
C
Y
Y2
T
DL
S1
S1
O/B
T
3
ERM5220R
FOR BOILER:
REMOVE JUMPER FROM R TO J
SINGLE POLE/DOUBLE
THROW RELAY
TO AUXILIARY CIRCUIT FOR OPERATING
BOILER. (SEE VALVE INSTRUCTIONS)
LOW VOLTAGE TRANSFORMER
POWER-OPEN/POWER-CLOSED ZONE VALVE
WIRING AT THERMOSTAT IF CUSTOMER ALSO HAS FORCED AIR COOLING
THERMOSTAT SUBBASE (OR EIM)
7
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