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GUIDE SPECIFICATIONS (CONT)
M. Special Featur es:
1. Coil Options:
Shall include factory --installed optional tin--plated indoor,
copper/copper and vinyl-- coated refrigerant coils.
2. Economizer:
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.
3. Flat Roof Curb:
Curbs shall have seal strip and a wood nailer for flashing
and shall be installed per manufacturer’s instructions.
4. Manual Outdoor Air Damper:
Package shall consist of damper, birdscreen, and rainhood
which can be preset to admit outdoor air for year--round
ventilation.
5. Thermostat:
To provide for one--stage heating and cooling i n addition
manual or automatic changeover and indoor fan control.
6. Low Ambient Package:
Shall consist of a solid--state control and condenser coil
temperature sensor for controlling condenser-- fan motor op-
eration, which shall allow unit to operate down to 0_F
(-- 18_C) outdoor ambient temperature when properly
installed.
7. Filter Rack Kit:
Shall provide filter mounting for downflow or horizontal
applications.
8. Square--To--Round Duct Transitions (024--048):
Shall have the ability to convert the supply and return open-
ings from rectangular to round. (024--048 only)
9. Compressor Protection:
Solid--state control shall protect compressor by preventing
“short cycling.“
10. Crankcase Heater:
Shall provide anti-- floodback protection for low-- load cool-
ing applications.
11. Electric Heaters:
a. Electric heater shall be availabel 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.
12. Compressor Start Kit (single phase units only):
Shall provide additional starting torque for single--phase
compressors.
Copyright2008CarrierCorp.D 7310W.MorrisSt.D Indianapolis,IN 46231 Printedin U.S.A. EditionDa te: 09/08
Manufacturer reserves therighttochange,at anytime, specifications anddesigns withoutnotice andwithout obligations.
Catalog No: 50XP---05PD
Replaces:50XP---4PD
50XP