Honeywell ERM5220R1018 Install Manual page 7

4. For compressor applications: Leave the jumper between termi-
nals J and R in place.
For boiler applications: Remove the jumper between terminals J
and R.
FOR COMPRESSOR:
Fig. 5. Terminal Designations showing the jumper
5. For compressors and boilers: Connect a 24 VAC power source
to the R and C terminals on the ERM.
6. Connect terminals from the ERM to the appropriate terminals on
the compressor/boiler control board.
J R
Jumper J and R
FOR BOILER:
Remove Jumper
between J and R terminals.
Y
R
J C
24V CAN COME FROM AIR HANDLER
24
(COMPRESSOR APPLICATION)
VAC
V c.a.
OR EXTERNAL TRANSFORMER
Y2 O/B
Y L S1 S1
C D
T T
Y2 O/B
L S1 S1
D
T T
Fig. 6.
7
MCR35657
M35658
33-00135EFS—05