Carrier 38AUZ Spécifications télécharger pdf (Page 136)

Guide Specification for RTU-1

Project: ~Untitled65 05/30/2014

Prepared By: 10:46AM

Unit cabinet shall be constructed of phosphated, zinc--coated, pre--painted steel capable of with--1.

standing 500 hours in salt spray.

Normal service shall be through a 3 removable cabinet panels.2.

The unit shall be constructed on a rust proof unit base that has an externally trapped, integrated sloped 3.

drain.

Evaporator fan compartment top surface shall be insulated with a minimum 1/2--in. (12.7 mm) thick, 4.

flexible fiberglass insulation, coated on the air side and retained by adhesive and mechanical means. The

evaporator wall sections will be insulated with a minimum semi--rigid foil--faced board capable of being

wiped clean. Aluminum foil-faced fiberglass insulation shall be used in the entire indoor air cavity

section.

5. Unit shall have a field--supplied condensate trap.5.

C. Fans:

The evaporator fan motor shall be high efficiency brushless direct--drive multi--speed motor and control, 1.

as shown on equipment drawings.

Fan wheel shall be made from steel, be double--inlet type with forward curved blades with corrosion 2.

resistant finish. Fan wheel shall be dynamically balanced.

Condenser fan shall be direct drive propeller type with aluminum blades riveted to corrosion resistant 3.

steel spiders, be dynamically balanced, and discharge air vertically.

D. Compressor:

Fully hermetic compressors with factory--installed vibration isolation.1.

Scroll compressors shall be standard on all units.2.

E. Coils:

Evaporator and condenser coils shall have aluminum plate fins mechanically bonded to seamless copper

tubes with all joints brazed. Tube sheet openings shall be belled to prevent tube wear.

F. Refrigerant Components:

Refrigerant expansion device shall be of the TXV (thermostatic expansion valve) type.

G. Filters:

Filter section shall consist of field--installed, throwaway, 1-in. (25 mm) thick fiberglass filters of

commercially available sizes.

H. Controls and Safeties:

Unit controls shall be complete with a self--contained low voltage control circuit.1.

Units shall incorporate high and low pressure switches.2.

I. Operating Characteristics:

Unit shall be capable of starting and running at 125_F (51_C) ambient outdoor temperature per 1.

maximum load criteria of ARI Standard 210.

Compressor with standard controls shall be capable of operation down to 40_F (4_C) ambient outdoor 2.

temperature.

Unit shall be provided with 60--second fan time delay after the thermostat is satisfied.3.

J. Electrical Requirements:

All unit power wiring shall enter the unit cabinet at a single location.

K. Motors:

Compressor motors shall be of the refrigerant--cooled type with line--break thermal and current overload 1.

protection.

All fan motors shall have permanently lubricated bearings, and inherent, automatic reset, thermal 2.

overload protection.

Condenser fan motor shall be totally enclosed.3.

Evaporator fan motor to be high efficiency brushless DC motor. 4.

Packaged Rooftop Builder 1.39i Page 7 of 8

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Carrier 38AUZ Spécifications Page 136

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