Harness Installation Instructions
1. Turn the power to the unit OFF by disconnect-
ing the main power source.
ELECTRICAL SHOCK HAZARD. The
ON/OFF switch of the boiler does not discon-
nect electrical power to the module.
Disconnect electrical power to the boiler
using the main service switch.
2. Remove the front jacket panel by loosening the
retaining screws on each side of the display.
3. Dismount the front jacket panel by pulling the
bottom of the front panel out and the entire front
jacket panel down.
4. Pull the Control Display Module tray out from
the bottom jacket panel and swing the tray
downward. The guide pins on the front of the
tray should disengage the bottom panel (Fig.2).
5. Install the indirect circulator wiring harness by
feeding the end with 2 ferules and female dis-
connect through the boiler cabinet to the control
module from inside the boiler. The end of the
wiring harness with the splicing connectors
should be routed to the line voltage terminal
strip area. See Fig. 3.
6. Connect the green ground wire to an available
grounding tab along the top of the control mod-
ule. See Fig. 4.
7. Connect the black wire to X2-5 and the white
wire to X2-7. See Fig. 4.
WARNING
CHALLENGER
Indirect Circulator
Wiring Harness
Kit
2
Fig. 2: Terminal strip access
Fig. 1: Loosening of retained screws
Wiring Harness to
Control Module
Splicing
Connectors
C Clip
Fig. 3: Indirect Circulator Wiring Harness
Installation
