INS
TALLA
TION
16
•
Residen al Hybrid Electric Heat Pump Water Heater Use and Care Guide
Opera on
The water heater is now ready for
normal operation. To keep your water
heater working safely and efficiently
and extend its life, perform mainte-
nance as described in maintenance
section beginning on page 28.
Start-up and Opera on
NOTE:
The default opera ng mode is
Hybrid, to select a di
ff
erent mode see
“Operating Mode Descriptions” Sec-
tion on page 17.
PRIOR TO BEGINNING OPERATION
:
Air
fi
lter is factory installed with tabs
oriented down for shipping. Please see
maintenance sec on for instruc ons
on removal, cleaning and replacing.
1
Turn on electrical power to
the water heater.
2
Press the Mode/Enter bu on
to set the opera ng mode.
NOTICE:
The water heater will
conduct a system diagnos c (approxi-
mately 8 minutes) prior to returning to
opera on.
3
Once the diagnos c sequence
has
fi
nished, the fan should
turn on. This typically takes 8
minutes, (the User Interface Module
will display “-”, “--”, “---” repe vely
during this period).
NOTICE:
The heat pump’s fan will not
turn on if the incoming water tempera-
ture is less than 59
°
F/15
°
C and/or the
ambient air temperature is above
120
°
F/49
°
C, or below 45
°
F/7
°
C. Should
the internal diagnos cs detect a
problem with the heat pump, an error
code will be displayed.
4
Set the desired opera onal
mode. For typical installa ons,
the factory default mode,
Hybrid Mode o
ff
ers the best combina-
on of e
ffi
ciency and hot water
delivery. For detailed descrip ons of all
opera onal modes see “Adjus ng the
User Interface Module/Opera onal
Modes” sec on.
Step 12:
Adjus ng the
Temperature
With the installa on steps completed,
you may adjust the water heater’s
temperature se ng if desired.
1
The water heater’s tempera-
ture se ng has been factory
set to approximately
140°F/60
°
C . Higher tank temperatures
(140° F/60
°
C) kill bacteria that cause a
condi on known as “smelly water” and
can reduce the levels of bacteria that
cause water-borne diseases.
WARNING! Higher temperatures
increase the risk of scalding .
A mixing valve must be installed where
required.
Figure 23 -
Adjust Thermostat Mixing
Valves to 120°F/49
°
C or lower.
To adjust the water heater’s tempera-
ture se ng:
• The water temperature setting can
be adjusted by using the Up and
Down buttons
on the
UIM (User Interface Module). Using
the up or down buttons, cycle
through the available temperature
set points until the desired temper-
ature is displayed. The temperature
setting will blink on the display;
press the Mode/Enter button to
confirm the selection (see Figure
25).
• The available temperature set
points can be cycled through quick-
ly by pressing and holding the Up
button.
2
Please allow adequate me
for the heater to provide hot
water.
WARNING! If the Thermosta c
Mixing Valves are not set properly (or
not installed) you could scald yourself
while checking the temperature.
3
Check water temperature at
several points of use in your
home (for example, bathtub
faucet, shower, or lavatory sink) and
adjust the temperature as needed. If
you aren’t sure how to adjust the
Thermosta c Mixing Valve se ngs, or
aren’t sure if you have Thermosta c
Mixing Valves, contact a quali
fi
ed
person.
INSTALLATION
