Install Instructions

9 33-00135EFS—03
BOILER
Fig. 10.
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.
Mounting ERM
8. Use two screws and wall anchors to attach the ERM to the exterior
wall near the compressor. The location should be at least 3 feet
above ground and oriented with the two wire exits facing
downward. See Figs. 11 and 12.
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_B.book Page 9 Wednesday, November 11, 2015 11:31 AM