Steps For Replacing The Eco; T&P Relief Valve Maintenance; Wiring Connection Box; Element Access Panel/Eco Compartment - A.O. Smith ProLine XE Installation Instructions And Use & Care Manual

MAINTENANCE
• A replacement ECO (available by
calling the number in the repair
parts list located on page 31). A
business card to check the gap
between the ECO and tank.
• Tape and a permanent marker to
mark the wires
• A flat blade and a Phillips screw-
driver
Steps for Replacing the
ECO:
Turn the power OFF at the
1
circuit breaker or remove
fuses.
NOTICE: It is not necessary to drain the
tank to replace an ECO.
Open the electrical junction box
2
the side of the water heater.
Using a non-contact circuit
tester, check the power wires to make
certain the power is OFF.
1/2" Conduit
Opening
Green Ground
Screw
Green
Ground
Wire
Red Wire
Black Wire
Figure 44 - Wiring Connection Box
Remove the upper access
3
panel on the water heater and
carefully fold back the
insulation and plastic element/ECO
cover (See figure 45 on page 29).
Make sure the replacement
4
ECO matches the original ECO.
Mark the wires with tape so
5
you'll know how to put them
back on.
Disconnect the wires from the
6
bad ECO and remove the ECO
from the metal mounting clip.
Install the new ECO in the
7
metal mounting clip.
Make sure the new ECO fits
8
snuggly against the tank. You
should NOT be able to slip a
business card between the ECO and
the tank. If you can, bend the ECO
mounting clip until the ECO fits tightly
against the tank.
Attach the wires following the
9
wiring diagram on the water
heater's label. Make sure all
wire connections are tight.
Replace the plastic element/
10
ECO cover, insulation, and
access panel.
Replace the cover on the
11
electrical junction box.
Restore power to the water
12
heater. It may take two hours
for the tank to heat up.
Figure 45 - Element Access Panel/ECO
Compartment
Residential Hybrid Electric Heat Pump Water Heater Use and Care Guide • 29
T&P Relief Valve Main-
tenance
Read and follow the operating and
annual maintenance instructions
provided by the manufacturer of the
T&P Relief Valve (yellow label attached
to T&P Relief Valve). Minerals in the
water can form deposits that cause
the valve to stick or create blocked
passages, making the T&P Relief Valve
inoperative. Follow these guidelines:
• At least annually, operate the T&P
Relief Valve manually to ensure the
waterways are clear and the valve
mechanism moves freely (below).
Before operating the valve manu-
ally, check that it will discharge in a
place for secure disposal. If water
does not flow freely from the end
of the discharge pipe, turn OFF the
power to the water heater. Call a
qualified person to determine the
cause.
WARNING! Hot water will be
released. Before operating the T&P
relief valve manually, check that it
will discharge in a safe place. If water
does not flow freely from the end of
the discharge pipe, turn the power to
the water heater OFF. Call a qualified
person to determine the cause.
Figure 46 - T&P Relief Valve