Arcoaire R4A3 Installationsanleitung Handbuch - Seite 7

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INSTALLATION INSTRUCTIONS

CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in

improper product operation.

Do not bury more than 36" (1m) of line set under-

ground. Refrigerant may migrate to cooler buried

section during extended periods of unit shut−

down, causing refrigerant slugging and possible

compressor damage at start−up.

If ANY section of the line set is buried under-

ground, provide a minimum 6" (152mm) vertical

rise at the service valve.

D. OUTDOOR UNIT HIGHER THAN INDOOR UNIT

Proper oil return to the compressor should be maintained

with suction gas velocity. If velocities drop below 1500 fpm

(feet per minute), oil return will be decreased. To maintain

suction gas velocity, do not upsize vertical suction risers.

E. LIQUID LINE FILTER−DRIER

NOTE:

It is recommended that an appropriate

filter−drier be installed in the liquid line.

Leave the plugs in the tube ends until the filter−drier is

installed. The optimal location for the filter−drier is close

to the indoor coil. Install the filter−drier with the arrow

pointing towards the indoor coil. Refer to Figure 6.

Liquid Line Filter−Drier

Figure 6

Installed at Indoor Coil

Filter−Drier

(arrow points towards indoor coil)

421 01 5301 02

F. SERVICE VALVES

Service valves are closed and tube stubs are plugged

from the factory. Outdoor units are shipped with a

refrigerant charge sealed in the unit. Leave the service

valves closed until all other refrigerant system work is

complete or the charge will be lost. Leave the plugs in

place until line set tubing is ready to be inserted.

Service valve bodies are brass and tube stubs are

copper.

G. BRAZING CONNECTIONS

FIRE HAZARD

Failure to remove refrigerant and oil charge be-

fore brazing could result in personal injury, death,

and/or property damage.

Refrigerant and oil mixture could ignite and burn

as it escapes and contacts brazing torch. Make

sure the refrigerant charge is properly removed

from both the high and low sides of the system be-

fore brazing any component or lines.

Clean line set tube ends with emery cloth or steel brush.

Remove any grit or debris.

Insert line set tube ends into service valve tube stubs.

Apply heat absorbing paste or heat sink product between

service valve and joint. Wrap service valves with a heat

sinking material such as a wet cloth.

Braze joints using a Sil−Fos or Phos−copper alloy.

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in prod-

uct damage.

Braze with Sil−Fos or Phos−copper alloy on cop-

per−to−copper joints and wrap a wet cloth around

rear of fitting to prevent damage to TXV.

H. EVACUATING LINE SET AND INDOOR COIL

The unit is shipped with a factory refrigerant charge. The

liquid line and suction line service valves have been

closed after final testing at the factory. Do not disturb

these valves until the line set and indoor coil have been

evacuated and leak checked, or the charge in the unit

may be lost.

NOTE: Do not use any portion of the factory charge for

purging or leak testing. The factory charge is for filling the

system only after a complete evacuation and leak check

has been performed.

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in prod-

uct damage.

38−11−84

Never use the outdoor unit compressor as a vacu-

um pump. Doing so may damage the compressor.

Specifications subject to change without notice.

R−410A Split System Air Conditioner

WARNING

CAUTION