Residenal Hybrid Electric Heat Pump Water Heater Use and Care Guide • 29
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
1
Turn the power OFF at the
circuit breaker or remove
fuses.
It is not necessary to drain the
tank to replace an ECO.
2
Open the electrical juncon box
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
Power Supply
Connector
Red Wire
Black Wire
Green
Ground
Wire
Green Ground
Screw
Figure 44 - Wiring Connecon Box
3
Remove the upper access
panel on the water heater and
carefully fold back the
insulaon and plasc element/ECO
cover (See gure 45 on page 29).
4
Make sure the replacement
ECO matches the original ECO.
5
Mark the wires with tape so
you’ll know how to put them
back on.
6
Disconnect the wires from the
bad ECO and remove the ECO
from the metal mounng clip.
7
Install the new ECO in the
metal mounng clip.
8
Make sure the new ECO ts
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
mounng clip unl the ECO ts ghtly
against the tank.
9
Aach the wires following the
wiring diagram on the water
heater’s label. Make sure all
wire connecons are ght.
10
Replace the plasc element/
ECO cover, insulaon, and
access panel.
11
Replace the cover on the
electrical juncon box.
12
Restore power to the water
heater. It may take two hours
for the tank to heat up.
Figure 45 - Element Access Panel/ECO
Compartment
-
tenance
Read and follow the operang and
annual maintenance instrucons
provided by the manufacturer of the
T&P Relief Valve (yellow label aached
to T&P Relief Valve). Minerals in the
water can form deposits that cause
the valve to sck or create blocked
passages, making the T&P Relief Valve
inoperave. 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.
MAINTENANCE
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