A.O. Smith ATI-140H-N Service Handbook page 54

•
Item "I" in the schematic
(p. 22) uses a separate
wiring assembly which
includes three wires:
yellow, green, and
orange.) Install it as
shown in the schematic.
15.2 Insert the connector from
the power supply cable to
the top port on the fuse box.
See Figure 64.
16. Complete the wiring connec ons
inside the cabinet:
•
Locate the plug and receptacle
with blue wires. (They are at the
mid-center of the cabinet, on
the right-hand side.) Plug them
together.
•
Use screws to secure three
(3) green wires to the bottom,
center of the manifold plate. See
"Ground Connections" in Figure
25, page 36. (There are two
mounting holes for these wires.)
The three green wires can be
identified as follows:
◦
One green wire comes
from the power cord.
◦
Two green wires come
from connectors on the
computer board.
•
Plug in the flame rod wire
connectors (2). See "Flame Rod
& AFR Wire Connections" in
Figure 25, page 36.
17. Verify that all water connec ons
are ght and that there are no
parts le over.
18. Restore power to the water
heater.
54 • Condensing Models: On-Demand Water Heater Service Handbook
19. Open the gas valve slowly and
check for leaks. If any gas leaks
appear, shut off the gas and
disconnect power to the water
heater.
20. Turn on water to the heater and
test for proper opera on.
21. Verify that there are no water or
gas leaks.
If you have any questions, please
contact technical support.
OUTDOOR MODELS:
THREE OPEN CONNECTORS ON THE
COMPUTER BOARD
OPEN
OPEN (2)
Figure 63.
Figure 64.