Removing And Replacing The Water Piping System Components - American Water Heater 160X3P Manual

Built In Controller
Connecto Connector
Figure 72: Built-in controller removal.
Locate the thermistor(s) to be
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replaced using the fi gure below.
Exhaust Thermistor #718
Inlet Thermistor #407
Outlet Thermistor #408 Outlet Thermistor #408
Return Thermistor #731
Heat Exchanger Thermistor #411
Figure 73: Thermistor locations.
Remove the metal fastener or
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screw securing the thermistor.
No ce: keep the screw(s) or metal
fasteners for re-installa on of the
thermistors.
o o r r r r r r r r r
Ensure all wires are routed correctly
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and not pinched or under tension.
A ach the built-in controller to the
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front of the water heater.
Reconnect the wire from the built-in
controller to the computer board. See
Figure 72.
Before proceeding , take a moment
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to check the wiring connec on and
pipe connec ons. Make sure all are mated
correctly and seated securely.
Before restoring power to the
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water heater, check the piping
connec ons by restoring water to the
system and check for any leaks. Allow a
few moments for the system to pressurize.
Correct any leaks immediately. Open a hot
water faucet and allow the water to run
un l it fl ows with a full stream. Let the
water run full stream for three minutes
before closing the faucet.
Replace the front cover and
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secure with the four screws
removed earlier. Note the placement of
the built-in controller when se ng the
front cover in place to ensure proper
alignment.
Turn on the gas supply to the water
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heater at the manual gas shutoff
valve.
Reconnect power to the water
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heater by plugging it into the
wall outlet or turning it on at the circuit
breaker, as appropriate. Press the On/
Off bu on to turn the water heater back
on.
Verify proper opera on of the
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water heater.
On-Demand Water Heater Service Handbook for X3P Models
Removing and
Replacing the
Water Piping
System
Components
WARNING!
• To ensure your safety and the safety
of others, read and follow each step
of these instructions. Failure to do
so could result in personal injury or
death.
• If you do not have the skills
necessary to complete this
procedure correctly, do not
proceed. Seek assistance from a
qualified service technician.
Removing and replacing the water
piping system components:
Tools Needed: #2 Phillip's Head
Screwdriver
NOTICE: DO NOT USE ELECTRIC
SCREWDRIVERS OR DRILLS, HAND
TIGHTEN ALL SCREWS TO PREVENT
OVER TIGHTENING.
Disconnect power to the water
1
heater by unplugging it from the
wall outlet or turning it off at
the circuit breaker, as appropriate. The
power button on the water heater and
remote does NOT disconnect power to
the water heater. You must physically
disconnect power to the water heater.
Shut off the gas supply to the
2
water heater at the manual gas
shutoff valve.
Shut off water to the water
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heater and drain the system.
see Unit Draining and Filter Cleaning"
on p. 29. Place a bucket under the
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