Adjusting The Temperature; Start-Up And Operation; Adjust Thermostat Mixing Valves To120°F Or Lower - A.O. Smith ProLine XE Installation Instructions And Use & Care Manual

INSTALLATION
Operation
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 26.

Start-up and Operation

NOTE: The default operating mode is
Hybrid, to select a different mode see
"Operating Mode Descriptions" section
on page 17.
PRIOR TO BEGINNING OPERATION:
Air filter is factory installed with tabs
oriented down for shipping. Please see
maintenance section for instructions on
removal, cleaning and replacing.
Turn on electrical power to the
1
water heater.
NOTICE: The water heater will conduct
a system diagnostic (approximately 8
minutes) each time power is applied
from an off state. Normal operation will
begin after the system diagnostic has
been completed..
Once the diagnostic sequence
2
has finished, the fan should
turn on. This typically takes 8
minutes, (the User Interface Module
will display "-", "--", "---" repetitively
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/15°C, or below 45°F/7.2°C.
Should the internal diagnostics detect a
problem with the heat pump, an error
code will be displayed.
Set the desired operational
3
mode. For typical installations,
the factory default mode,
Hybrid Mode offers the best combina-
tion of efficiency and hot water delivery.
16 • Residential Hybrid Electric Heat Pump Water Heater Use and Care Guide
For detailed descriptions of all opera-
tional modes see "Operating Mode
Descriptions" page 17.
Step 12:
Adjusting the
Temperature
With the installation steps completed,
you may adjust the water heater's tem-
perature setting if desired.
The water heater's tempera-
1
ture setting has been factory
set to approximately
140°F/60°C. Higher tank temperatures
(140° F/60° C) kill bacteria that cause a
condition 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.
Adjust Thermostat Mixing
Figure 23 -
Valves to120°F or lower.
To adjust the water heater's tempera-
ture setting:
• The water temperature setting
can be adjusted by using the Up
and Down buttons
the UIM (User Interface Module).
Using the up or down buttons, cycle
through the available temperature
set points until the desired tempera-
ture is displayed. The temperature
setting will blink on the display;
press the Mode/Enter button to
confirm the selection (see figure 26
on page 19).
• The available temperature set points
can be cycled through quickly by
pressing and holding the Up button.
Please allow adequate time for
2
the heater to provide hot
water.
WARNING! If Thermostatic Mixing
Valves are not set properly (or not in-
stalled) you could scald yourself while
checking the temperature.
Check water temperature at
3
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
Thermostatic Mixing Valve settings, or
aren't sure if you have Thermostatic
Mixing Valves, contact a qualified
person.
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