Heat Pump Water Source Console Units - ECR CM Installation, Operation & Maintenance Manual

NOTICE
The room temperature must be above 65°F (18°C) for the com-
pressor to operate in cooling mode on Water Source Console
Units with unit-mounted controllers.
CAUTION
When the unit is first powered up, high humidity conditions
can cause condensation to form on the discharge grill. Keep
doors and windows closed to reduce humidity and condensa-
tion will evaporate.
Heating cycle — electric option
1. Place the thermostat or system switch in the
2. Adjust the thermostat for a warmer temperature until the indoor
fan starts running and the electric heater coil starts emitting
heat.
3. After the unit starts running and the space gets warmer, adjust
the thermostat to a cooler temperature until the electric heater
turns off.
4. If a warmer room temperature is desired, adjust the thermostat to
a warmer temperature setting, which will turn the electric heater
back on.
5. If a cooler room temperature is desired,
to a cooler temperature setting until the electric heater turns off.
The fan will stop.
6. Place the thermostat or system switch in the
All operation should stop.
NOTICE
Room temperature must be below 85°F (29.4°C) to energize
the heater on Water Source Console Units with unit-mounted
controllers.
Heating cycle — hydronic option
NOTICE
Make sure the motorized valve is rated for the correct voltage.
Most RetroAire units with unit mount controls will power a
hydronic valve that is the same voltage as the unit (ex: a unit
rated 208/230V will power a 208/230V). Be sure to check the
wiring diagram (located on the unit) and voltage application for
the specific unit. Other valve configurations and voltage options
are available. Consult Technical Service if the unit voltage does
not match your valve application.
1. Place the thermostat or system switch in the HEAT position.
2. Adjust the thermostat to a warmer temperature.
The following should then occur:
• The motorized valve should open and allow hot water to run
through the coil.
P/N 240008071, Rev. B [112309]
• Installation, Operation, and Maintenance Manual •
Final Inspection & Start-up
HEAT position.
adjust the thermostat
OFF position.
17
Water Source Console Units
(continued)
• The indoor fan will run, blowing air through the hydronic coil.
• The signal to the water valve will continue until the room tem-
perature rises above the setpoint by 3°F (2°C).
3. After the unit starts running and the area gets warmer, adjust the
thermostat to a cooler temperature, the hydronic valve will close and
indoor fan will switch off .
4. If a warmer room temperature is desired,
a warmer temperature setting, which will open the hydronic valve
and turn on the indoor fan.
5. If a cooler room temperature is desired, a
a cooler temperature setting. The hydronic valve will again close
and fan will stop.
6. Place the thermostat or system switch in the
All operation should stop.
NOTICE
Room temperature must be below 85°F(29°C) for the hydronic
heater to operate.

Heat Pump Water Source Console Units

NOTICE
The unit is equipped with a reversing valve that is energized for
cooling and de-energized in heating mode.
Cooling cycle — heat pump units
1. Place the thermostat or system switch in the
2. Adjust the thermostat to a cooler temperature until the indoor
starts running. The compressor will then turn on and cold air will
begin to flow from the unit. Allow the unit continue operating to
cool the room and remove humidity.
3. After the unit starts running and the space gets cooler, adjust the
thermostat to a warmer temperature until the compressor cycles
off.
4. If a colder room temperature is desired, adjust the thermostat to a
cooler temperature setting, turning the compressor and fan back
on.
5. If a warmer room temperature setting is desired, adjust the ther-
mostat to a warmer temperature. The cooling mode will cease and
the compressor and fan will stop.
6. Place the thermostat or system switch in the
All operation should stop.
NOTICE
The room temperature must be above 65°F (29°C) for the com-
pressor to operate in cooling mode on Water Source Console
Units with unit-mounted controllers.
OFF position. All operation should stop.
7. Place system switch in the
adjust the thermostat to
djust the thermostat to
OFF position.
COOL position.
fan
OFF position.
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