Removing And Replacing The Recirculation Pump - American Water Heater 160X3P Manual

Removing and
Replacing the
Recircula on
Pump
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 recirculation pump:
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 water
2
heater at the manual gas shutoff
valve.
Use a Phillips-head screwdriver to
3
remove the 4 screws securing the
64 • On-Demand Water Heater Service Handbook for X3P Models
cover to the water heater. Set the front
cover and screws aside for re-installa on.
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 77.
Built In Controller
Connector Connecto
Figure 77: Built-in controller removal.
Shut off water to the water
5
heater and drain the system.
See draining page 29. Place a bucket
under the water heater and open the
plas c drain port located on the
bo om le side of the water heater.
Allow the system to completely drain
before proceeding.
Remove the three
6
fasteners securing the plas c
piping to the recircula on pump.
uses a 16A metal fastener, Connec ons
and use 12.7A metal fasteners.
2 3
See Figure 78.
Joint "E" # 485
2
3 3
Joint "G" # 4 Joint "G" # 487 487
1
Figure 78: Metal Fastener and Pipe Joint Re-
moval.
Remove the plas c piping Joint
6
"E" and Joint "G". Set these
sec ons aside for re-installa on. See
Figure 78.
from the
Remove the two screws securing
7
the recircula on pump to the
base of the water heater. See Figure 79.
Pump Screws Pump S
o or o r r r r r r r r
Figure 79: Pump screw removal.
Unplug
8
recircula on pump and remove it
from the water heater. See Figure 80.
Figure 80: Recirculation pump wiring connector.
Replacing the recirculation pump:
Connect the wiring removed
9
earlier to the new recircula on
metal
pump. See Figure 80.
Secure the new recircula on pump
1
10
to the water heater with the two
screws removed earlier. See Figure 79.
Reconnect plas c piping joints.
11
Inspect the O-rings, if any cuts or
nicks are
immediately. See Figure 78.
Rea ach
12
fasteners securing the plas c
piping joints to the recircula on pump.
uses a 16A metal fastener,
1
p S p S p S S S S c cr cr cre c c ws
the wiring to the
Wiring Connector
present replace them
the three metal