Condensing Models: On-Demand Water Heater Service Handbook • 45
MAINTENANCE
16.2 Insert the connector from
the power supply cable to
the top port on the fuse box.
See Figure 43.
16.3 Use screws to secure
three (3) green wires to
the bo om, center of the
manifold plate. See “Ground
Connec ons” in Figure 24,
page 35. (There are two
moun ng holes for these
wires.) The three green
wires can be iden
fi
ed as
follows:
•
One green wire comes
from the power cord.
•
Two green wires come
from connectors on the
computer board.
17. Complete the wiring connec ons
inside the cabinet:
•
Locate the plug and receptacle
with
blue
wires. Plug them
together at the right-hand side of
the cabinet.
•
Locate the plug and receptacle
with
yellow
wires. Plug them
together at the top, right-hand
corner of the cabinet.
•
Plug in the flame rod wire
connectors (2). See “Flame Rod &
AFR Wire Connections” in Figure
24, page 35.
•
Plug in the high limit switch and
exhaust thermistor connectors.
See Figure 24, page 35 (top).
18. Plug the wires from the
temperature controller (item 721,
p. 67) to the matching wires
from the computer board. (These
wires are black and white).
19. Verify that all water connec ons
are ght and that there are no
parts le over.
20. Restore power to the water heater.
21. Open the gas valve slowly and
check for leaks. If any gas leaks
appear, shut o
ff
the gas and
disconnect power to the water
heater.
22. Turn on water to the heater and
test for proper opera on.
23. Verify that there are no water or
gas leaks.
24. Insert the temperature controller
into the opening of the front cover,
then reinstall the front cover.
If you have any questions, please
contact technical support.
Secure PCB
with screw.
Secure
fuse box w/
2 screws.
Figure 42.
Figure 43
