Carrier 50XT manual Guide Specifications Cont, M. Special Features

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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