Carrier 50HQ User Manual download pdf (Page 2)

High quality construction and

testing

All units are manufactured to meet

extensive quality control protocol from

start to finish through an automated

control system, which provides contin-

uous monitoring of each unit and

performs quality control checks as

equipment progresses through the

production process. Standard construc-

tion features of the Aquazone™ units

include:

Cabinet — Standard unit fabrication

consists of heavy gage galvanized sheet

metal cabinet construction that provides

maximum strength. Cabinet interior

surfaces are lined with

in. thick,

dual density, 1

lb per cubic ft acous-

tic, fiberglass type insulation. Sheet

metal surfaces are treated for maxi-

mum corrosion protection to ensure

resilience for long term vitality. The

condensate pan is coated with baked-

on enamel finish and insulated.

Compressor — Aquazone large-

capacity units include dual high-

capacity scroll compressors. Compres-

sor isolating springs are specially

selected for each compressor size. The

external isolation springs are mounted

on an isolated railing system to mini-

mize vibrations to the unit structure.

Blower and motor assembly —

Belt-driven centrifugal blowers are pro-

vided with all units to satisfy many air

distribution applications. Optional

motor speeds and sizes are available to

provide high-static capability. Aqua-

zone blower motors are designed to

operate at lower temperatures to help

improve the reliability of the WSHP.

Refrigeration/water circuit — Units

have a sealed refrigerant circuit includ-

ing a scroll compressor. Refrigerant

circuits are provided with a standard

thermostatic expansion valve (TXV) for

higher accuracy and performance. Also

standard are a reversing valve (4-way

valve), water-to-refrigerant coaxial

(tube-in-tube) coil, and enhanced alumi-

num fin/rifled copper tube air-to-refrig-

erant heat exchanger coil.

Environmentally sound

Carrier’s Puron

refrigerant (R-410A)

enables you to make an environmen-

tally responsible decision. Puron

refrigerant (R-410A) is an HFC refrig-

erant that does not contain chlorine

that is damaging to the stratospheric

ozone layer. Puron refrigerant

(R-410A) is unaffected by the Montreal

Protocol. Puron refrigerant (R-410A) is

a safe, efficient and environmentally

sound refrigerant for the future.

AHRI/ISO — Carrier’s Aquazone

units have AHRI (Air Conditioning,

Heating and Refrigeration Institute)/

ISO, NRTL (Nationally Recognized

Testing Lab), or ETL labels and are fac-

tory tested under normal operating

conditions at nominal water flow rates.

Quality assurance is provided via test-

ing report cards shipped with each unit

to indicate specific unit performance

under cooling and heating modes of

operation.

Quiet operation

Fan motor insulation and compressor

springs are provided for sound isola-

tion, cabinets are fully insulated to

reduce noise transmission, low speed

blowers are utilized for quiet operation

through reduced outlet air velocities,

and air-to-refrigerant coils are designed

for lower airflow coil face velocities.

Design flexibility

Airflow configuration for Aquazone

horizontal units is available as left

return and right discharge. Extended

water temperature range between 20

and 110

F offers maximum design flex-

ibility for all applications. Water flow

rates as low as 1.5 gpm per ton assist

with selection from a various range of

circulating pumps. Factory-installed

options are offered to meet specific

design requirements.

Safe, reliable operation

Standard safety features for the refrig-

erant circuit include high-pressure

switch and low-pressure sensor to

detect loss of refrigerant. A low air

temperature sensor safeguards against

freezing. Equipment safety features

include water loop temperature moni-

toring, voltage protection, water coil

freeze protection, and standard elec-

tronic condensate overflow shutdown.

All Aquazone safety features are tested

at the factory to assure proper opera-

tion of all components and safety

switches.

All components are carefully de-

signed and selected for endurance,

durability, and carefree day-to-day

operation.

The Aquazone unit is shipped to

provide internal and external equip-

ment protection. Shipping supports

are placed under the blower housing

and compressor feet. In addition, units

are mounted on oversized pallets with

lag bolts for sturdiness and maximum

protection during transit.

Ease of installation

The Aquazone unit is packaged for

simple low cost handling, with minimal

time required for installation. All units

are pre-wired and factory charged with

refrigerant. Water connections and

condensate drains are anchored

securely to the unit cabinet. High and

low voltage knockouts are provided on

all units.

Simple maintenance and

serviceability

The Aquazone™ WSHP units are con-

structed to provide ease of mainte-

nance. Units allow access to

Features/Benefits (cont)

Table of contents

Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

AHRI/ISO Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Physical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Options and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-9

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11,12

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-20

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Typical Control Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . .23-25

Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-29

Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30-33

1 2 3 4 5 6 7 ... 33 34

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Carrier 50HQ User Manual Page 2

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