Carrier Comfort 50EZ-A Product Data page 29

GUIDE SPECIFICATIONS (CONT)
L. Special Features Available:
1. Coil Options:
Base unit with tin plated indoor coil hairpins.
2. Compressor Start Kit (single phase units only
Shall provide additional starting torque for single- -phase
compressors.
3. Thermostat:
To provide for two- -stage heating and one- -stage cooling in
addition manual or automatic changeover and indoor fan
control.
4. Crankcase Heater:
Shall provide anti- -floodback protection for lowload cooling
applications.
5. 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. wc pressure differential.
c. Spring return motor shuts off outdoor damper on power
failure.
6. 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.
7. Filter Rack Kit:
Shall provide filter mounting for downflow applications.
8. Flat Roof Curb:
Curbs shall have seal strip and a wood nailer for flashing
and shall be installed per manufacturer's instructions.
9. Low Ambient Package:
Shall consist of a solid- -state control and outdoor coil tem-
perature sensor for controlling outdoor- -fan motor opera-
tion, which shall allow unit to operate down to 0_F
(- -17.7_C) outdoor ambient temperature.
10. Louvered Grille:
Wire grille shall be standard on all units. Louvered grille
shall be available as a field- -installed option to provide hail
guard and vandalism protection.
11. Manual Outdoor Air Damper:
Package shall consist of damper, birdscreen, and rainhood
which can be preset to admit outdoor air for year- -round
ventilation.
12. Square- -To- -Round Duct Transitions (24- -48 size):
Shall have the ability to convert the supply and return open-
ings from rectangular to round.
13. Time Guard II
Automatically prevents the compressor from restarting for
at least 4 minutes and 45 seconds after shutdown of the
compressor. Not required when a corporate programmable
thermostat is applied or with a RTU- -MP control.
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