Install Instructions

Part number 550-100-321/0520
3
Instructions for Wiring the System Circulator
Wait until heat exchanger/boiler is cooled down
before proceeding. Failure to do so can cause severe
injury.
Label wires before removing
Label all wire harness(es) prior to removing
controls. Wiring errors can cause improper and
dangerous operation.
It will be easier to add additional wiring if control module and
pressure temperature gauge are free of the enclosure. See Figure 5.
Removing ignition electrode wire
1. Disconnect the ignition wire from the control module. The
ignition wire pulls out of the top left back of the control
module, see Figure 4. Remove the ignition wire by pulling
out the connector, not the wire.
3. Remove the one (1) Phillips head screw holding the control
module in place, see Figure 3.
Figure 3 Moving control module to access wiring
Installation of Circulator Wiring Kit
1. Control module can be moved so that there is easy access to
open the control housing.
2. Remove terminal blocks from back of module. See Figure 6.
The block with 2 black wires will no longer be used. Secure
this terminal block to adjacent wires to keep it out of the way.
Figure 6 Terminal Blocks removed from back of
module.
Figure 5 Control in position to be removed.
Figure 4 Removing ignition electrode wire from back
of control module.
Remove by
pulling out the
connector, not
the wire!
1
Figure 7 Bottom View of Control Module – 3 tabs
BEFORE
AFTER
3. Release three (3) tabs on control module enclosure bottom.
en release one tab on each side to open control module.
See Figure 7 and 8.
Lift
to
gain
access
to
wiring
2
1
Push tabs to
release bottom