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20 • Residenal Electric Water Heater Use and Care Guide
Heat Pump Mode
Provides the highest eciency and
lowest cost operaon by using only
the heat pump for heang. Recovery
me and eciency will vary with
ambient temperature and relave
humidity. Eciency will be greatest,
and recovery quickest, when both
are high. At lower temperatures and
relave humidity levels, eciency will
be lower and recovery will take longer.
Heat pump operaon is allowed
between 37°F/3°C to 120°F/48.9°C
ambient temperature. At ambient
temperatures lower than 37°F/3°C
and greater than 120°F/48.9°C, the
heat pump will not operate. Similarly,
if the water temperature in the
tank is less than 55°F/13°C, the heat
pump will not operate. The Control
Assembly will display the code HPO,
and the unit will operate in Electric
Mode unl ambient air and water
temperatures return to the safe
operang range of the heat pump.
Hybrid Mode
This is the default, recommended
seng combining high energy
eciency with reduced recovery
me. This mode uses the heat pump
as the primary heang source. One
of the heang elements (upper or
lower) will provide supplementary
heang if demand exceeds a
predetermined level so that the set
point temperature can be recovered
more quickly.
Electric Mode
The water heater funcons as a
convenonal electric unit, relying on
only the elements for heat. This mode
may be useful in periods of increased
hot water demands. When Electric
Mode is selected, the duraon mer
will be displayed. The default Electric
Mode days are preset at 3 days. Press
the Up and Down buons to modify
the mer to the desired number of
Electric Mode days (seng range: 1
to 7 days). The mer will blink on the
display; press the Mode/Enter buon
to conrm the Electric Mode mer.
NOTICE: Do not shut o power to the
unit for extended periods of me.
If power must be turned o for an
extended period of me, turn OFF
the power to the water heater at the
circuit breaker/fuse box, and then
drain the tank completely.
Other Controls
HEAT PUMP DEFROSTING
INDICATION:
There will be frost accumulang
on the evaporator when the heat
pump is operated under low ambient
temperatures. The controller will
order the unit to enter defrosng
cycle to opmize the heat pump
operaon performance. During
the defrosng period, the Control
Assembly will display ICE as an
indicaon.
OUT OF HEAT PUMP OPERATION
RANGE:
The Control Assembly will display HPO
as an indicaon that the ambient and/
or water temperature condion is out
of the heat pump operaon range.
NOTICE: The display will go into
“Sleep Mode” for energy saving if
there is no operaon on any buon
for 15 minutes. All of the display and
lights will be turned o except for the
“Operaonal Mode Indicaon Light,”
which will remain illuminated while
the unit is powered on. The unit can
be awakened by pressing any buon.
Your Heat Pump Water Heater is
equipped with an EcoPort CTA-2045
communicaon port. Contact your
local electric ulies company for
parcipaon and plug in module
availability and to learn more
about potenal energy savings
opportunies.
OPERATION
OPERATION
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