ECR RetroAire R90C Installation, operation & maintenance manual - page 20
3.
After unit starts running and area is warmer, adjust
thermostat to cooler temperature, hydronic valve will
close and indoor fan will switch off after sixty-second
purge time has elapsed.
4.
For warmer room temperature, adjust thermostat to
warmer temperature setting, which opens hydronic
valve and turns on indoor fan.
5.
For cooler room temperature, adjust thermostat to
cooler temperature setting. Hydronic valve closes and
indoor switches off after sixty-second purge time has
elapsed.
6.
Place thermostat or system switch in
OFF
position.
All operation should stop.
NOTICE
Room temperature must be below 85°F (29°C) for
hydronic heater to operate on PTAC's with unit-
mounted controllers.
Hydronic valve is 24Vac normally open valve. Should
power be interrupted, valve will default to open
position.
Testing Completion For Cooling-Only PTAC's
If
TEST
jumper was set to
test mode
verify it is set back
to
normal operation.
See Figure 9, page 17.
NOTICE
Do not leave unit operating with TEST jumper in
TEST position. Prolonged operation with unit on test
mode will cause damage to internal components.
Heat Pump PTHP's
NOTICE
Unit equipped with reversing valve energized for
cooling and de-energized in heating mode.
Cooling Cycle — Heat Pump Units
1.
Place thermostat or system switch in
COOL
position.
2.
Adjust thermostat to cooler temperature until indoor
fan starts running. Compressor and outdoor fan turn
on and cold air begins to flow from unit. Let unit
continue operating to cool room and remove humidity.
3.
Unit starts running and space gets cooler, adjust
thermostat to warmer temperature until compressor
cycles off.
4.
Colder room temperature desired, adjust thermostat
to cooler temperature setting, turning the compressor
and both fans back on.
INSPECTION & START-UP
5.
Warmer room temperature desired, adjust thermostat
to a warmer temperature. The cooling mode will cease
and the compressor and outdoor fan will stop. The
indoor fan will switch off after the sixty-second purge
time has elapsed.
6.
Place thermostat or system switch in
OFF
position.
All operation stops.
NOTICE
Room temperature must be above 85°F (29°C) for
compressor to operate in cooling mode on PTHP's
with unit-mounted controllers.
7.
Place system switch in
OFF
position. All operation
stops.
Heating Operation — Heat Pump Units — Outdoor
Temperature Above 40°F (4°C)
1.
Place thermostat or system switch in
HEAT
position.
2.
Adjust thermostat to warmer temperature setting until
indoor fan start to run. Compressor and outdoor fan
turn on, warm air begins to flow.
3.
Unit starts to run and space gets warmer, adjust
thermostat to cooler temperature until compressor
cycles off.
4.
Warmer room temperature, adjust thermostat to
warmer temperature setting turning indoor and
outdoor fans, and compressor back on.
5.
Cooler room temperature is desired, adjust thermostat
to cooler temperature setting. Heating mode ceases
and compressor and outdoor fan stops. Indoor fan
switches off after sixty-second purge time has elapsed.
NOTICE
Room temperature must be above 85°F (29°C) for
compressor to operate in cooling mode on PTHP's
with unit-mounted controllers.
6.
Place thermostat or system switch in
OFF
position. All
operation stops.
NOTICE
Heat pump units are “Limited Range” equipped with
back-up electric resistance heat. Limited Range
heat pumps are designed to operate when outdoor
temperatures are between 75°F(24°C) and 40°F
(4°C) and with maximum indoor temperature of
85°F (29°C) . When outdoor temperature falls
below 40°F (4°C) unit will switch from heat pump to
electric resistance heat, or optional hydronic heat if
selected. Electric heat or hydronic heat will remain
heat source until outdoor temperatures rise above
50°F (10°C). RetroAire heat pumps (R_ _H) are
single-stage heating units. Electric heat and heat
pump will NOT operate simultaneously.
The Right Fit for Comfort
20
P/N 240010330, Rev. A [10/15/2013]