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Reference Figure 59 for correct orienta on.
Reconnect the heat exchanger
44
thermistor connector. See Figure
58 on page 56.
Reconnect
the
igniter
45
connector (purple wires).
Reconnect the Over Heat Cutoff
46
Fuse (O.H.C.F.) and the Hi Limit
Switch. Both connectors are located on
the same blue cable.
Reconnect the inlet thermistor. It is
47
located under the secondary heat
exchanger. See Figure 60 on page 56.
Reconnect the three cables
48
coming from the fan motor
assembly to their plas c connectors. See
Figure 56 on page 56.
Reinstall the copper gas pipe
49
using the 16-25A metal fasteners
removed earlier. Inspect the O-rings, if
any cuts or nicks are present replace
them immediately. See See Figure 57 on
page 56.
Slide the plas c housing with the
50
computer board back into the
water heater. Secure it in place with the
bracket and screw removed earlier. See
Figure 55 on page 55.
A ach the built-in controller to
51
the front of the water heater.
Reconnect the wire from the built-in
controller to the computer board.
Reference the wiring diagram on page
28 or in the maintenance sheet. for plug
loca on.
Use the white plas c cable clips
52
removed earlier to organize the
series of ver cal cables along the right
side of the water heater.
Re-install the rain protec on tray
55
using the screw removed earlier.
Secure the exhaust duct to the top
56
of the water heater enclosure
using the screw removed earlier and
reconnect the exhaust thermistor. See
Figure 66 on page 57.
Before proceeding , take a moment
57
to check all wiring connec on and
pipe connec ons. Make sure all are mated
rod
correctly and seated securely.
Before restoring power to the
58
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.
Replace the front cover and
59
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
60
water heater at the manual gas
shutoff valve.
Reconnect power to the water
61
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.
Turn on the gas supply to the
62
water heater at the manual gas
shutoff valve.
Verify proper opera on of the
63
water heater.
Removing and
Replacing the
Igniter - Flame
Rod Assembly
WARNING!
• To ensure your safety and the
safety of others, read and follow
On-Demand Water Heater Service Handbook for X3P Models
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 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.
Use a Phillips-head screwdriver to
3
remove the 4 screws securing the
cover to the water heater. Set the front
cover and screws aside for re-installa on.
Disconnect the two wires from the
4
igniter rod connectors. See Figure
70.
•
59
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