Install Instructions

Part number 550-100-321/0520
5
Instructions for Wiring the System Circulator
7. Connect the wiring kit (Connection C) to incoming
120VAC power cable and (Connection D) to the control
module, as shown in Figure 13.
10. Connect the ground wire that was disconnected in step 9
to the terminal coupling of the wiring kit. See Figure 16.
Figure 13 Connect Wiring Kit to Power Supply
8. Locate the ground junction plate on inner bottom panel
of boiler. Disconnect the ground wire from front / right
terminal, as shown in Figure 14.
Figure 14 Locate Ground Junction Plate
9. Connect the wiring kit (Connection B) to the front/right
terminal of ground junction plate, as shown in Figure 15.
Figure 15 Connect Wiring Kit to Ground Junction
Figure 16 Reconnect All Ground Wires
11. Secure the terminal block (Connection E) of the wiring kit
on the back of control module as shown in Figure 17. Re-
install the terminal which was removed in Step 2.
Figure 17 Terminal block attached to back of control
module
12. Connect the system pump to the open side of terminal
block shown in Figure 17. Green (ground), Red (hot),
White (Neutral). See Field Installation wiring diagram
Figure 18.
13. Reinstall control module on cabin tabs and rotate back into
place. See Figures 3 & 5.
14. Re-connect the ignition cable to the control module. Figure
4 shows the location from which this was removed.
15. Reinstall screw (Figure 3) to hold control module securely
in place.
16. Reinstall jacket door and secure with two (2) screws at bot-
tom.
17. Restore electrical power.
18. The circulator must be configured as the system pump in
the boiler control. Set Parameter b13 from 7 to 4, in order
to complete the set up. See Boiler Manual to access Param-
eter settings.
Replacing Fuse, if Necessary
1. e wiring kit includes an in-line fuse. e fuse is rated to
3.15 A. (Weil-McLain part number 640-000-122)
2. Read all safety warnings in this instruction manual prior to
opening boiler to access and replace the fuse.
Perform Boiler Manual start-up
Removing and reinstalling components can
change boiler behavior. After any maintenance
procedure, you must prove the boiler is operating
correctly. To do so, follow all instructions in Boiler
Manual and Operating Instructions to start-up the
boiler after installing the new wiring. Because the
boiler has been changed, you must verify correct
operation as described in the Boiler Manual.
Failure to comply could result in severe personal
injury, death, or substantial property damage.
Reinstall boiler jacket front door
Reinstall boiler jacket front door after servicing. The
boiler front door must be securely fastened to the
boiler frame to prevent boiler from drawing air from
inside the boiler room. This is particularly important
if the boiler is located in the same room as other
appliances. Failure to keep the door securely fastened
could result in severe personal injury or death.
Reinstall
Relay Kit