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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.
50EZ--A
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