Armstrong Air Conditioning 4HP14 설치 및 시작 지침 - 페이지 3

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Elevate Unit

Accumulation of water and ice in base pan may cause

equipment damage.

Elevate unit per local climate and code requirements to

provide clearance above estimated snowfall level and

ensure adequate drainage of unit. Use snow stand in areas

where prolonged freezing temperatures are encountered.

If conditions or local codes require the unit be attached

to pad or mounting frame, tie down bolts should be used

and fastened through knockouts provided in unit base pan.

Roof Top Installations

Mount on level platform or frame 6 inches above roof

surface. Place unit above a load-bearing wall and isolate

unit and tubing set from structure. Arrange supporting

members to adequately support unit and minimize

transmission of vibration to building. Ensure roof structure

and anchoring method is adequate for location. Consult

local codes governing rooftop applications.

Roof mounted units exposed to winds above 5 mph may

require wind baffles to achieve adequate defrost. A sheet

metal baffle should be spaced 6-1/2" from the fall of the

coil. The height should cover the face of the coil and the

length should be 6" from the access panel.

NOTE: Unit must be level to within ± 2 (± 3/8 in./ft) per

compressor manufacturer specifications.

Clearance Requirements

When installing, allow sufficient space for airflow

clearance, wiring, refrigerant piping, and service. For proper

airflow, quiet operation and maximum efficiency. Position

so water, snow, or ice from roof or eaves cannot fall directly

on unit.

506318-01

CAUTION

DO LOCATE THE UNIT:

With proper clearances on sides and top of unit

On a solid, level foundation or pad

To minimize refrigerant line lengths

DO NOT LOCATE THE UNIT:

On brick, concrete blocks or unstable surfaces

Near clothes dryer exhaust vents

Near sleeping area or near windows

Under eaves where water, snow or ice can fall

directly on the unit

with clearance less than 2 ft. from a second unit

with clearance less than 4 ft. on top of unit

Operating Ambient

The minimum outdoor operating ambient in cooling

mode is 55°F, and the maximum outdoor operating ambient

in cooling mode is 125°F. The maximum outdoor operating

ambient in heating mode is 66°F.

Refrigeration Line Sets

Use only refrigerant grade copper tubes. Split systems

may be installed with up to 50 feet of line set (no more than

20 feet vertical) without special consideration (see long line

set guidelines).

Recommended Liquid & Vapor Tube Diameters (In.)

Unit

Size

Connections Dia.

018

024

030

036

042

048

060

* FIELD SUPPLIED 7/8 X 1-1/8 CONNECTOR REQUIRED ON BOTH ENDS OF VAPOR TUBING.

It is important that no tubing be cut or seals broken until

you are ready to actually make connections to the evaporator

and to the condenser section. DO NOT remove rubber plugs

or copper caps from the tube ends until ready to make

connections at evaporator and condenser. Under no

circumstances leave the lines open to the atmosphere for

any period of time, if so unit requires additional evacuation

to remove moisture.

Be extra careful with sharp bends. Tubing can "kink"

very easily, and if this occurs, the entire tube length will

have to be replaced. Extra care at this time will eliminate

future service problems.

It is recommended that vertical suction risers not be

up-sized. Proper oil return to the compressor should be

maintained with suction gas velocity.

Issue 0946

LIQUID

Tube Dia.

Connections Dia.

3/8"

3/4"

3/8"

3/4"

3/8"

3/4"

3/8"

7/8"

3/8"

7/8"

3/8"

7/8"

3/8"

7/8"

VAPOR

Tube Dia.

3/4"

7/8"

*1-1/8

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