A.O. Smith 318257-000 Water Heater User Manual


 
9
Figure 8A
Junction Box
Ground
Wire
Conduit
(Field Connection)
Black Wire
Red Wire
Green
Ground
Wire
Red
Black
Approved Connectors
Figure 9
Wiring Diagram
Overload
Protection
To 240v
1 Phase
Power supply
Electrical
Service ground
L1
L2
Circuit
Breaker
Ground
Wire
Green
Connecting the Condensate Pump
Over ow Shut Off Switch
Turn off power to the electrical wiring for the water 1.
heater at the circuit breaker/fuse box.
Locate the white 18 AWG wire loop behind the field 2.
wiring junction box. See Figure 8B.
Cut the loop and strip insulation off of the two ends.3.
Measure the distance from the field wiring junction box 4.
to the condensate pump, and cut two 18 AWG or larger
wires to correct length and strip the insulation at both
ends of each wire. See Figure 8B.
Connect these two wires to the two wires on the water 5.
heater using wire nuts or other connectors.
Connect the free ends of the two wires to the shut off 6.
switch on the condensate pump in accordance with the
manufacturers recommendations.
Turn on electrical power to the water heater.7.
Press the power button to turn the water heater on 8. and
select the desired operational mode. After about 8
minutes, the heat pump will turn on.
Test the operation of the shut off switch by unplugging 9.
the condensate pump and filling the condensate
reservoir with water until the float switch opens the
circuit.
The heat pump should turn off and the error code 10.
“CONDENSATE DRAIN ALARM “will appear on the
user interface screen.
Plug the condensate pump in and verify that the pump 11.
operates and pumps the water out of the condensate
reservoir.
The error on the user interface should clear and the 12.
heat pump should operate after 8 minutes.
Insulation Blankets
The use of an insulation blanket on this water heater is not
needed or recommended. The purpose of an insulation
blanket is to reduce the standby heat loss encountered with
storage tank heaters. Your water heater meets or exceeds
the National Appliance Energy Conservation Act standards
with respect to insulation and standby loss requirements,
making an insulation blanket unnecessary.
Figure 8B
Condensate Pump Wiring
Condensate Pump Wiring Loop
18 AWG - White
(Loop Located Behind Junction Box)
White Wires
From Water Heater
Wires to Condensate
Pump Overflow
Shut Off Switch
(18 AWG or Larger)