23
GUIDE SPECIFICATIONS (CONT)
M. Special Features:
1. Coil Options:
Shall include factory--installed optional tin--plated indoor
copper/copper and vinyl--coated refrigerant coils.
2. Flat Roof Curb:
Curbs shall have seal strip and a wood nailer for flashing and
shall be installed per manufacturer’s instructions.
3. Manual Outdoor Air Damper:
Package shall consist of damper, bird screen, and rain hood
which can be preset to admit outdoor air for year--round ven-
tilation.
4. Evolution
t
User Interface:
To provide for two--stage heating and one--stage cooling in
addition to manual or automatic changeover and indoor fan
control.
5. Low--Ambient Package:
Shall consist of a solid--state control and outdoor coil tem-
perature sensor for controlling outdoor fan motor operation,
which shall allow unit to operate down to 0
°
F outdoor ambi-
ent temperature in cooling.
6. Filter Rack Kit:
Shall provide filter mounting for downflow and horizontal
applications.
7. Square--To--Round Duct Transitions:
Shall have the ability to convert the supply and return open-
ings from rectangular to round (024--048 sizes only).
8. Crankcase Heater:
Shall provide anti--floodback protection for low--load cool-
ing applications. (Standard on 042--060 sizes.)
9. Compressor Protection (Time Guard
®
II Kit)
Solid--state control shall protect compressor by preventing
“short cycling.”
10. 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.
11. Compressor Hard Start Kit:
Shall be available to give a boost to the compressor motor
at each start--up.
704C
