Specifications

Catalog 1301 / Page 28 of 32
Engineering Guide Specications – 16" × 44" Flat Top Conguration
Furnish and install where shown on plans (packaged terminal air conditioners) (packaged terminal heat pumps) of
the sizes and capacities shown on the schedule. The units shall be located as shown on the drawings and shall include
cabinet/wall sleeve, chassis, outdoor louver, and room cabinet. (Units furnished with hydronic heat shall also include a
hydronic subbase, valve and appropriate controls).
All units shall be UL listed for safety and ETL certied for performance. Units shall be McQuay Comfort
Conditioner, PDAE/PDHE, or equal. Overall dimensions for the basic unit shall not exceed 42
1
/2" wide, 16
1
/2" high,
and 22" deep. (Overall dimensions of the wall sleeve shall not exceed 16" high, 42" wide and 13
3
/4" deep).
(Units furnished with hydronic heat shall not exceed 43" wide, 24
1
/2" high and 20" deep).
(Units furnished with an electrical subbase shall not exceed 43" wide, 24
1
/2" high and 22" deep).
All units shall operate on ____ volts, 60 Hz, single-phase power.
Heating/Cooling chassis – Chassis shall be slide-in, plug-in type with a self-contained, hermetically sealed
refrigerant circuit. All chassis sheet metal parts shall be constructed of either powder-coated A-60 or G-60 galvanized
steel for maximum corrosion resistance. The chassis shall consist of the following components:
Vibration isolated compressor; ried copper tubed evaporator and condenser coils with high efciency raised lance
aluminum plate ns mechanically expanded to the tubes for maximum heat transfer; and a capillary restrictor type
refrigerant metering device. Coils shall be factory tested at 300 psig. (Heat pump models shall also include reversing
valve and charge balancing device). A positive closing (manual) fresh air damper may be located within the chassis to
provide fresh air during fan operation.
Airow system shall include separate fan motors for the condenser and evaporator sections. The condenser fan
motor shall be a single-speed, totally enclosed, permanently lubricated fan motor. Condenser fan shall be propeller
-
type with a slinger ring and shall be constructed of aluminum.
The indoor fan motor shall be a two-speed, totally
enclosed; permanently lubricated fan motor must be positioned on the indoor side of the bulkhead so as to be
completely within the conditioned, ltered airstream. The indoor blower fan shall be a forward-curved tangential
design to provide even airow across the evaporator coil.
During the cooling cycle:
The compressor, the outdoor fan motor and the indoor fan motor shall be energized. Condensation accumulated on
the evaporator coil shall be drained into the outdoor section where it is to be picked up by the condenser fan/slinger
ring and evaporated against the outdoor coil. In the cool mode, the compressor will cut in if the space temperature is
at least 1°F above the thermostat set point and will cut out when the space temperature is approximately 2°F below set
point, subject to timing protections.
During the heating cycle:
Electric Resistance Heat – Control will call for electric heat when the space temperature is 1°F lower that the set
point. The control will cease its call when the space temperature is 3°F or higher than set point.
Only the indoor fan motor and electric resistance heater are energized. The outdoor condenser fan motor and
compressor shall not be energized. Heater shall be open wire type with quick response and high limit cutout. Heaters
shall be sized to meet heating requirements as shown on the schedule. Electric resistance heaters must be placed
behind the indoor evaporator coil and must not be visible through the indoor discharge grille. When the heater cuts out
the indoor fan continues to run for 15 seconds at the set speed, regardless of On or Off mode. After 15 seconds the fan
will stop running if unit is in Off mode, else the fan operation will depend on Fan Continuous or Fan Cycle setting.
Hydronic, Hot water or Steam, heat – Only the indoor fan motor, the (normally open) (normally closed) valve
and automatic fresh air damper shall be energized. The outdoor condenser fan motor and compressor shall not be
energized.