Carrier WeatherExpert N7 Specifications download pdf

HVAC Guide Specifications — Section 50N2,N3,N4,N5,N6,N7,N8,N9

Packaged Rooftop Cooling Unit with ComfortLink Controls and Optional Electric or

Hydronic Heat

Size Range:

75 to 150 Tons, Nominal

Carrier Model Number:

50N2 (Vertical Supply/Return, Constant Volume [CV] Application, Staged Air

Volume [SAV™])

50N3 (Vertical Supply/Return, Variable Air Volume [VAV] Application)

50N4 (Horizontal Supply/Return, Constant Volume Application, Staged Air Volume)

50N5 (Horizontal Supply/Return, Variable Air Volume Application)

50N6 (Vertical Supply/Horizontal Return, Constant Volume Application, Staged Air

Volume)

50N7(Vertical Supply/Horizontal Return, Variable Air Volume Application)

50N8 (Horizontal Supply/Vertical Return, Constant Volume Application, Staged Air

Volume)

50N9 (Horizontal Supply/Vertical Return, Variable Air Volume Application)

NOTE: Items throughout the specification which apply only to units with electric or

hydronic heat are indicated by single brackets [i.e.,].

Part 1 — General

1.01 SYSTEM DESCRIPTION

Outdoor, roof-curb mounted, electronically controlled cooling [and heating] unit utilizing

hermetic scroll compressors with crankcase heaters for cooling duty [and utilizing electric

resistance coils for heating duty]. Units shall supply air vertically or horizontally and return air

vertically or horizontally as shown on the contract drawings.

1.02 QUALITY ASSURANCE

A. Units shall be manufactured in a facility registered to ISO 9001 manufacturing quality

standard.

B. Unit shall be rated in accordance with AHRI Standard 340/360, latest edition.

C. Unit shall be designed to conform to ANSI/ASHRAE 15 (latest edition), ASHRAE 62, and

UL Standard 1995.

D. Unit shall be listed by ETL and ETL, Canada, as a total package.

E. Roof curb shall be designed to NRCA criteria per Guideline B-1986.

F. Insulation and adhesive shall meet NFPA 90A requirements for flame spread and smoke

generation.

1.03 DELIVERY, STORAGE, AND HANDLING

A. All units shall be completely shrink-wrapped from the factory for protection during

shipment. Tarping of units is unacceptable.

B. Inspect for transportation damage and store in clean dry place and protect from weather

and construction traffic. Handle carefully to avoid damage to components, enclosures,

and finish.

Part 2 — Products

2.01 EQUIPMENT

A. Factory-assembled, single-piece heating and cooling unit. Contained within the unit

enclosure shall be all factory wiring, piping, refrigerant charge (R-410A), operating oil

charge, dual refrigerant circuits, microprocessor- based control system and associated

hardware, and all special features required prior to field start-up.

B. Unit Cabinet:

1. Unit shall be double-wall construction with insulation sealed between the inner and

outer panels. Panel assemblies shall not carry an R-value of less than 8. The panels

shall be galvanized steel (designated G60 per ASTM Standard A653 - minimum

coating weight of 0.6 oz of zinc per square foot), bonderized and primer-coated on

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Summary of Contents

Page 1

HVAC Guide Specifications — Section 50N2,N3,N4,N5,N6,N7,N8,N9 Packaged Rooftop Cooling Unit with ComfortLink Controls and Optional Electric or Hydroni

Page 2

Unit shall be equipped with extended lube lines to facilitate lubrication of fan bearings from one side of the unit. 17. Belt Guard: Unit shall be eq

Page 3 - 1/2-in. OD

Variable air volume units shall be equipped with a supply fan VFD. The VFD shall control motor speed to maintain set point static pressure control at

Page 4

measured in an ASME nozzled test apparatus using a 45 F airstream moving at not less than 400 fpm. Lamp output at 253.7 nm shall not be less than 10 μ

Page 5 - 2 ppm (outdoor and

The Navigator display module shall be a portable hand-held display module with a minimum of 4 lines and 20 characters per line, of clear English langu

Page 6

46. LonWorks Protocol Translator: A controller-based accessory module shall provide CCN access to LON FT-10A ANSI/EIA-709.1 protocol conversion. 47.

Page 7 - ® Adaptive Dehumidification:

both sides and coated with a baked polyester thermosetting powder coating finish on the outer surface. 2. Unit casing shall be capable of withstandi

Page 8

g. Fan shaft bearings shall be self-aligning, pillow- block, regreasable ball or roller-type selected for a minimum average life of 200,000 hours at

Page 9

1. Headers shall be steel with MPT connections. 2. Inner steam distributing tubes shall be 5/8-in. OD, 0.020 in. wall thickness, located within 1

Page 10

7) Adaptive optimal stop shall turn off the compressors a preset amount of time before the end of the occupied mode to conserve energy (CV only). 8)

Page 11 - ® Interior:

dehumidification operation result in cooling of the space down to the occupied heating set point. 20) Supply Air Temperature Set Point Reset: Control

Page 12

c. Test mode must also be capable of displaying outputs of microprocessor-controller and to verify operation of every thermistor, actuator motor, fa

Page 13 - 2) Sensor:

fin edges, shall be provided. E-coated coils shall have superior hardness characteristics of 2H per ASTM D3363-00 and cross-hatch adhesion of 4B-5B pe

Page 14

13. Ultra Low Leak Economizer: Dry bulb, differential dry bulb temperature, enthalpy, or optional differential enthalpy controlled integrated type co

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Carrier WeatherExpert N7 Specifications

Browse online or download Specifications for Split-system air conditioners Carrier WeatherExpert N7. Carrier WeatherExpert N7 Specifications [en] User Manual

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