Removing And Replacing The Venturi Assembly - American Water Heater 160X3P Manual

Turn on the gas supply to the
11
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
12
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
13
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
14
water heater.
Removing and
Replacing the
Venturi Assembly
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 the venturi assembly:
Tools Needed: #2 Phillip's Head
Screwdriver.
NOTICE: DO NOT USE ELECTRIC
SCREWDRIVERS OR DRILLS, HAND
TIGHTEN ALL SCREWS TO PREVENT
OVER TIGHTENING.
46 • On-Demand Water Heater Service Handbook for X3P Models
the
Fan Assembly
Figure 31: Fan Assembly
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.
Remove the white plas c cable
4
clips securing the various cables
to the copper gas pipe.
Locate and follow the three cables on
5
the fan motor assembly to their
plas c connectors. Disconnect and move
O-Ring P75, # 134
O-Ring P50, # 132
Venturi Assembly, # 126
Venturi Duct
Gas Solenoid Assembly
them aside. Reference Figure 33 to iden fy
cables.
Valve Connector
Figure 32: Fan Motor Assembly Wire Connections
6
copper gas pipe (# 104) and set them
aside for re-installa on. Remove the two
screws securing the fan motor to the
mixing chamber assembly. See Figure 34.
Figure 33: Gas Pipe removal.
O-Ring P40, # 125
Air Damper Assembly
Pressure
Air Damper
Sensor
Connector
Gas Solenoid
Connector
Y,O,W,R,BR
R,LB,G,B
Remove the 16-25A
fasteners on both ends of the
16-25A Fastener
Copper Gas Pipe
R,W,BK
metal