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Figure 70: Igniter wires and flame rod wires.
Disconnect the fl ame rod
5
connector (Yellow wire). No ce:
the fl ame rod connector uses a special
connec on. Press the small tab in the
center of the connector to release it. See
Figure 71.
Press small
tab.
Flame Rod Connector
Flame Rod Conne
Figure 71: Flame Rod Connector.
Remove the 4 screws securing the
6
igniter - fl ame rod assembly to the
primary heat exchanger. Set these screws
aside for re-installa on. See Figure 70
Removing the Igniter - Flame Rod
Assembly:
WARNING! The igniter - fl ame rod
assembly must be properly installed to
prevent exhaust gases from leaking.
Failure to follow can cause carbon
monoxide poisoning or death.
Before installing the new igniter -
7
fl ame rod assembly remove any
debris/gasket material from the primary
heater exchanger moun ng point.
Install the new igniter - fl ame rod
8
assembly, reference Figure 70 for
correct orienta on. Secure with the four
60
•
On-Demand Water Heater Service Handbook for X3P Models
screws removed earlier. Check to ensure
the gasket is not pinched and is fully
sealed.
Before proceeding , take a moment
9
to check all wiring connec ons and
pipe connec ons. Make sure all are mated
correctly and seated securely.
Turn on the gas supply to the
10
water heater at the manual gas
shutoff valve and check for leaks. If any
leaks
are
detected,
re-seat
appropriate connec on(s) and re-check.
Replace the front cover and
11
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.
Reconnect power to the water
12
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
13
water heater.
Removing And
Replacing The
Thermistors
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.
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
the water heater. You must physically
disconnect power to the water heater.
Use a non-contact circuit tester to
confirm that power is off before
working on or near any electrical parts.
Shut off the gas supply to the
2
water heater at the manual gas
shutoff valve.
Shut off the water supply to the
3
heater and drain the heater as
per "Unit draining and Filter Cleaning"
page 29.
Locate the wire on the built-in
4
controller and follow it to the
computer board. Carefully disconnect
the
built-in
controller
computer board. Reference the wiring
diagram on page 28 or in the
maintenance sheet. Set the built-in
controller aside for re-installa on. See
Figure 72.
from
the
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