A.O. Smith ProLine XE - Access Panel; Drain Valve; Water Faucet; Replacing the ECO

MAINTENANCE
28 • Residenal Hybrid Electric Heat Pump Water Heater Use and Care Guide
3
Open a hot water faucet and
let the hot water run unl it is
cool.
Figure 40 - Water Faucet

-

4
Connect a garden hose to the
drain valve and place the other
end of the hose in a drain or
outside (or use buckets). Turn OFF the
cold water valve that supplies the water
heater. Open the drain valve on the
water heater. Opening a hot water
faucet will help the tank drain faster.
5
Remove the upper or lower
access panel on the water
heater, and then fold back the
insulaon and remove the plasc
element/thermostat cover.
Figure 41 - Access Panel
6
With the tank drained and
power o, remove the power
wires from the element you
intend to replace.
7
Remove the bad element
using an element wrench.
8
Make sure the new element is
the correct replacement by
referring to the water heater’s
data plate for voltage and waage
informaon.
9
Clean the threads in the tank
opening with a rag. Insert the
new element equipped with a
rubber gasket. NOTE: Use a drop of
hand dishwashing liquid to lubricate
the gasket to help avoid damaging the
gasket as it is being ghtened. Tighten
with an element wrench.
NOTICE! Do not turn power back on
unl the tank is completely full of water.
For complete instrucons on lling the
tank, follow Step 10 in the Installaon
secon.
10
Rell the tank by opening the
cold water supply valve. Make
sure a hot water faucet is
open and the drain valve is closed.
Allow the hot water to run full for at
least three minutes to make sure the
tank has all the air removed and is
completely full of water. Failure to
perform this step can cause the upper
heang element to burn out. Once you
are certain the tank is completely full
of water, close the hot water faucet.
Figure 42 - Drain Valve
11
Check the newly installed
element for leaks. If a leak is
present, ghten the element
unl the leak stops. If you cannot stop
the leak, drain the tank and remove
the element. Inspect the gasket for
damage. If the gasket is damaged,
replace the gasket and re-install the
element.
12
Once the element is success-
fully installed and there are no
leaks, replace the power
wires, thermostat cover, insulaon,
and access panel. Make sure all wire
connecons are ght. Replace the
cover on the electrical juncon box.
13
Restore power to the water
heater. It may take two hours
for the tank to heat up.

-





-

To replace the ECO, you’ll need the fol-
lowing tools and supplies:
• A non-contact circuit tester. Always
turn power OFF and check with a
non-contact circuit tester before work-
ing on the water heater.
Figure 43 - ECO
MAINTENANCE