Install Instructions

33-00135EFS—09 8
COMPRESSOR
Fig. 7.
BOILER
Fig. 8.
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) designate Radiant Heat for Heating System Type
(ISU 2000) in your thermostat.
M35668
C
Y
D
L
S1
S1
J
R
O/B
T
Y2
T
C
Y
D
L
R
Y2
O/B
24
VAC
V c.a.
10K OHM OUTDOOR
TEMPERATURE
SENSOR (OPTIONAL)
EQUIPMENT CONTROL BOARD
M35673
C
Y
D
L
S1
S1
J
R
O/B
T
Y2
T
T
EQUIPMENT
CONTROL
BOARD
10K OHM INDOOR
TEMPERATURE
SENSOR
(RECOMMENDED)
T
24
VAC
V c.a.
33-00135EFS_E.book Page 8 Tuesday, February 18, 2020 3:52 PM