INS
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18
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Residen al Hybrid Electric Heat Pump Water Heater Use and Care Guide
Hybrid Mode -
This is the default, recommended
setting, combining high energy
efficiency with reduced recovery time.
This mode uses the heat pump as the
primary heating source. The heating
element will heat water if demand
exceeds a predetermined level so
that the set point temperature can be
recovered more quickly.
Electric Mode -
The water heater functions as a
conventional electric unit, relying on
only the elements for heat. This mode
may be useful in periods of increased
hot water demands. Electric Mode will
remain for 48 hours before reverting
back to default mode setting.
Vacation Mode -
The controller will not allow the
temperature to drop below 60
°
F
while in Vacation setting. This mode is
recommended when the water heater
is not in use for a long period of time,
to minimize energy consumption
and prevent the water heater from
freezing during cold conditions.
C AUTION! Hydrogen gas builds up
in a hot water system when it is not
used for a long period (two weeks
or more). Hydrogen gas is extremely
fl
ammable. If the hot water system
has not been used for two weeks or
more, open a hot water faucet for
several minutes at the kitchen sink
before using any electrical appliances
connected to the hot water system.
Do not smoke or have an open
fl
ame
or other igni on source near the fau-
cet while it is open.
NOTE:
When Vacation Mode is
selected, the vacation timer will be
displayed. Press the Up and Down
button to modify the timer to desired
number of vacation days (setting
range: 1 to 99 days). The vacation
timer will blink on the display; press
the Mode/Enter button to confirm the
vacation timer. To deactivate Vacation
Mode, press the Mode/Enter button
to switch to the desired mode.
NOTE:
Do not shut off power to the
unit for extended periods of time.
If power must be turned off for an
extended period of time, drain the
tank completely.
Other Controls
°F/°C Switch - Press “Temperature
Down” button and hold for 3 seconds
to switch temperature unit between
Farenheit and Celsius
Power Saver Enable/Disable:
•
Press “Mode/Enter” button and
hold for 3 seconds. The power
saver feature will be activated
and the display will show “P.S.”
(not to be mistaken with P5), and
the setting temperature alterna-
tively. This feature allows the unit
to be managed by grid or other
utility based load management
programs.
•
To deactivate the power saver,
press “Mode/Enter” button and
hold for 3 seconds.
Heat pump defrosting indication:
•
There will be frost accumulat-
ing on the evaporator when the
heat pump is operated under low
ambient temperatures. The con-
troller will order the unit to enter
into defrosting cycle to optimize
the heat pump operation per-
formance. During the defrosting
period, the user interface module
will display “ICE” as an indication.
Out of heat pump operation range:
•
The user interface module will
display “HPO” as an indication
that the ambient and/or water
temperature condition is out of
the heat pump operation range.
NOTE:
The display will go into “Sleep
Mode” for energy saving if there is no
operation on any button for 15 min-
utes. All the display and lights will be
turned off except for the “Operational
Mode Indication Light”, which will
remain illuminated while the unit is
powered on. The unit can be awak-
ened by pressing any button.
INSTALLATION
