Honeywell Home ERM5220R Guide D'installation page 8

COMPRESSOR
BOILER
IMPORTANT
If the ERM was previously used with a compressor and will now
be used with a boiler:
1) un-enroll the ERM at the thermostat;
2) remove the jumper on the ERM;
3) Set thermostat for Radiant Heat System Type
(ISU 200 or 2000 depending on thermostat).
33-00135EFS—11
Y2
Y
J R C
T
24
VAC
V c.a.
R C Y Y2 O/B
EQUIPMENT CONTROL BOARD
Y
J R C
24
VAC
V c.a.
EQUIPMENT
O/B
D L S1 S1
T
10K OHM OUTDOOR
TEMPERATURE C7089U1006
SENSOR (OPTIONAL)
D L
Fig. 7.
O/B
Y2
D L S1 S1
T T
T T
10K OHM INDOOR
TEMPERATURE
SENSOR C7189U1005
CONTROL
(RECOMMENDED)
BOARD
Fig. 8.
M35668
M35673
8