16
Subject to change without prior notice Revised 05-12
6 720 220 048
CE Series
Initial Start-Up
3. Depress the hot water tank pressure relief valve
handle to ensure there is no air remaining in the tank.
4. Carefully inspect all plumbing for water leaks.
Correct as required.
5. Purge all air from HR by depressing the schrader
valve on the HR Unit. Allow all air to bleed out
until water appears at the valve.
6. Before restoring the power or fuel supply to the
water heater, adjust the temperature setting on the
tank thermostat(s) to ensure maximum utilization of
the heat available from the refrigeration system and
conserve the most energy. On tanks with both upper
and lower elements and thermostats, the lower
element should be turned down to 100° F, while the
upper element should be adjusted to 120° F.
Depending upon the specic needs of the customer,
you may need to adjust the upper element differently.
On tanks with a single thermostat lower the
thermostat setting to 120° F or the “LOW” position.
7. After thermostat adjustments are completed,
replace access cover and restore electrical or fuel
supply to water heater.
INITIAL START-UP:
1. Make sure all valves in heat recovery water piping
system are open. NEVER OPERATE HR PUMP DRY.
2. Turn on the heat pump. The HR pump should not
run if the compressor is not running.
3. Turn HR switch to the “ON” position. The pump
will operate if entering water temperature to HR
is below 120° F.
4. The temperature difference between the water
entering and leaving the heat recovery should be
5° to 15° F.
5. Allow the unit to operate for 20 to 30 minutes to
ensure it is functioning properly. The pump
should shut off when the water temperature
entering the heat recovery reaches 120°F.
HOT GAS REHEAT
There are several ways to control heat pumps with
hot gas reheat. You should choose the means that
best suits your specic application. The Typical
Wiring Diagram (Figure #14) illustrates one possible
control sequence. Most heat pump compatible
thermostats in conjunction with a humidistat are
acceptable for use, (Note: “O” output for reversing
valve energized in cooling mode is required.)
Combination thermostats/humidistat are also
available.
MAINTENANCE
1. Filter changes or cleanings are required at regular
intervals. The time period between lter changes
will depend upon type of environment the
equipment is used in. In a single family home, that is
not under construction, changing or cleaning the
lter every 60 days is sufcient. In other applications
such as motels, where daily vacuuming produces a
large amount of lint, lter changes may be need to
be as frequent as biweekly.
Equipment should never be used during
construction due to likelihood of wall board dust
accumulation in the air coil of the equipment
which permanently affects the performance
and may shorten the life of the equipment.
2. An annual “checkup” is recommended by a
licensed refrigeration mechanic. Recording the
performance measurements of volts, amps, and
water temperature differences (both heating
and cooling) is recommended. This data should
be compared to the information on the unit’s
data plate and the data taken at the original
startup of the equipment.
3. Lubrication of the blower motor is not required,
however may be performed on some motors to
extend motor life. Use SAE-20 non-detergent
electric motor oil.
4. The condensate drain should be checked
annually by cleaning and ushing to insure
proper drainage.
5. Periodic lockouts almost always are caused by air or
water ow problems. The lockout (shutdown) of the
unit is a normal protective measure in the design of
the equipment. If continual lockouts occur call a
mechanic immediately and have them check for:
water ow problems, water temperature problems,
air ow problems or air temperature problems. Use
of the pressure and temperature charts for the unit
may be required to properly determine the cause.
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