E-mail: [email protected]
Made in Rome, New York, USA
16
COOlING OpERATION
The electronic circuit board of the indoor unit also has
an anti-short cycle timer (ASCT) feature designed to pre-
vent short cycling. Once the room temperature is satisfied
and the unit switches off, the ASCT will not allow the unit
to restart unit a three-minute time period has elapsed.
After connecting the thermostat to the unit place the
system switch in
cool
mode. Adjust the set-point tem-
perature below the room temperature. For chilled water
systems, the coldwater valve will open allowing the flow
of water. Place the set-point temperature above the room
temperature. The CW valve will close while the indoor fan
will remain on for an additional sixty seconds.
ElECTRIC HEAT OpERATION
Place the thermostat system switch in
heat mode
.
Adjust the set-point temperature above the room tempera-
ture. The electric heat will energize along with the indoor
fan motor. heating will continue so long as the set-point
remains above room temperature. Next place the set-point
temperature below room temperature. The electric heater
will switch off and the indoor fan will remain on for an ad-
ditional sixty seconds.
COMMON TO All AIR HANdlERS - SEqUENCE OF OpERATION
Continued
HYdRONIC HEAT OpERATION
(Optional On CCP Units)
An optional hydronic heat package may be selected
in lieu of electric heat. heating operation is essentially the
same as that of units with electric heat. With the thermostat
system switch
set to
heat
and the set-point temperature
above room temperature, the hydronic valve will open al-
lowing water to flow through the coil. The indoor fan will
also switch on and warm air will flow from the unit. Heating
will continue so long as the set-point remains above room
temperature. Place the set-point temperature below room
temperature. The hydronic valve will close and indoor
fan will switch off after the sixty-second purge time has
elapsed.
Units with an optional hydronic heat coil or chilled water
coil are also equipped with a freeze protection thermostat.
The freeze protection thermostat is designed to protect
the hydronic coil or chilled water coil from freeze up due to
abnormally cold fresh air from the fresh air system. Should
the freeze sensor activate, the indoor fan will switch off
to eliminate the source of cold fresh air. For units with a
hydronic hot water valve installed, the valve will be ener-
gized allowing warm water to flow and assist in the defrost
process. The system will remain in this state until the freeze
condition is satisfied where-by the freeze thermostat will
reset.
After starting the unit, complete the
Test Unit Performance Data
sheet on page 17.
Save this information for future servicing. In the event there is a problem with the unit.
perform the test again (if possible) and have both sets of data ready when
calling for assistance.
