Special Features - Carrier 50XT Product Data

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. Infinityt User Interface:
To provide for two- -stage heat pump heating, two- -stage cool-
ing, and electric (auxiliary) heat, in addition to manual or au-
tomatic changeover and indoor fan control.
5. Low- -Ambient Cooling:
Low- -ambient cooling must be enabled in the UI setup to al-
low unit to operate down to 0°F (- -17_C) outdoor ambient
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. 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.
10. Compressor Hard Start Kit:
Shall be available to give a boost to the compressor motor at
each start- -up.
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