Specification Sheet

34
518 71 2005 06
Specificatio ns subject to change without notice.
GUIDE SPECIFICATIONS (CONT)
G. Filters:
Filter section shall consist of field- installed, throwaway,
1- in. (25 mm) - thick fiberglass filters of commercially
available sizes.
H. Controls and Safeties:
1. Unit controls shall be complete with a self- contained,
low- voltage control circuit.
2. Units shall incorporate an internal compressor protector
that provides reset capability.
I. Operating Characteristics:
1. Unit shall be capable of starting and running at 125_F
(51.7_C) ambient outdoor temperature.
2. Compressor with standard controls shall be capable of
operation down to 40_F(4.4_C) ambient outdoor
temperature in cooling mode.
3. Unit shall be provided with 90 - second fan time delay
after the thermostat is satisfied.
J. Electrical Require ments:
All unit power wiring shall enter the unit cabinet at a single
location.
K. Motors:
1. Compressor motors shall be of the refrigerant- cooled
type with line- break thermal and current overload
protection.
2. All fan motors shall have permanently lubricated
bearings, and inherent, automatic reset, thermal
overload protection.
3. Condenser fan motor shall be totally enclosed.
4. Evaporator fan motor to be ECM Motor.
L. Special Features Available:
1. Compressor Start Kit (single phase units only):
Shall provide additional starting torque for single- phase
compressors.
2. Thermostat:
To provide for two- stage heating and one - stage cooling
in addition manual or automatic changeover and indoor
fan control.
3. Crankcase Heater:
Shall provide anti- floodback protection for lowload cool-
ing applications.
4. Economizer:
(Horizontal - Field installed accessory)
(Vertical - Field installed accessory)
a. Economizer controls capable of providing free
cooling using outside air.
b. Equipped with low leakage dampers not to exceed
3% leakage, at 1.0 in. W.C. pressure differential.
c. Spring return motor shuts off outdoor damper on
power failure.
5. Electric Heaters
a. Electric heater shall be available as a field installed
option.
b. Heater elements shall be open wire type, adequately
supported and insulated with ceramic bushings.
c. Electric heater packages must provide single point
power connection capability.
6. Filter Rack Kit:
Shall provide filter mounting for downflow applications.
Offered as a field installed accessory.
7. Flat Roof Curb:
Curbs shall have seal strip and a wood nailer for flashing
and shall be installed per manufacturer’s instructions.
8. Low Ambient Package:
Shall consist of a solid- state control and outdoor coil
temperature sensor for controlling outdoor- fan motor op-
eration, which shall allow unit to operate down to 0_F
(- 17.7_C) outdoor ambient temperature.
9. Manual Outdoor Air Damper:
Package shall consist of damper, birdscreen, and rain-
hood which can be preset to admit outdoor air for year -
round ventilation.
10. Square- To- Round Duct Transitions (24- 48 size):
Shall have the ability to convert the supply and return
openings from rectangular to round.
11. Cabinet Leakage
Cabinet air leakage less than 2.0% at 0.5 inch W.C.
when tested in accordance with ASHRAE s tandard 193.
Available as a factory installed option.
12. Dual Point Electric Heaters:
Allows you to power the electric heater and unit
contactor separately by having two individual field power
supply circuits connected respectively.