ICM Controls ICM550 Quick Start Manual page 2

Mode Selection Switch
The Mode selection switch is used to set up the condition of relay K2 based on the model you are replacing (See Table 1). When
set up in Position A, relay K2 is normally closed and will open in defrost. When set up in position B, relay K2 is normally open and
will close in defrost.
Mode "A" Operation
Refrigeration Mode: Green light ON and Red light OFF
(K1 NC, K2 NC)
Defrost Mode: Red light ON and Green light OFF
(K1 NO, K2 NO)
Table 1 – Mode Switch Selection Table
Time Initiated &
Time Terminated
Paragon Precision SW1
8045 6045 A
8041 6041 A
8047 6047 B
Installing the ICM550 into a Grasslin Enclosure
Push plastic tab DOWN Push plastic tab DOWN to
to release the cover and release the board.
pull the cover out of the
enclosure.
Bracket removed from
ICM550. Discard the bracket
and screws.
Time Initiated & Pressure or
Temperature Terminated
Paragon Precision
8145 6145
8141 6141
8143
Pull the bottom of the existing board UP until the board is
detached from the enclosure.
Align the ICM550 so it slides
UP and INTO the plastic
channels (A), while ensuring
the screw holes on the
ICM550 line up with the plastic
standoffs (B) on the enclosure
D-Channel D-Channel
A A A
B
B
A
B
Mode "B" Operation
Refrigeration Mode: Red and Green lights OFF
Defrost Mode: Red and Green lights ON
Time Initiated &
Pressure Terminated
SW1 Paragon
A 8245
A 8247
B
The ICM550 correctly
placed in channels (A) with
screw holes secured using
the four plastic standoffs (B)
of the enclosure.
A
B
B B
(K1 NC, K2 NO)
(K1 NO, K2 NC)
Grasslin
Precision
A
B
Remove the four screws (circled) to
release the ICM550 from its bracket. The
four holes will be used to connect the
ICM550 to the Grasslin enclosure.
Firmly press the board down
with thumbs on both sides
"***" of "C".
B B B
C
SW1
DT040 A
DT140 A
DTMV A
DTSX A
DTAV40 A/B per system
C C C
Replace the cover by
aligning the top of the
cover into channel "D"
then press the bottom of
the cover down firmly until
it snaps into place.
D D