Allied 2HP13/14 Istruzioni per l'installazione/avvio/manuale informativo per il proprietario della casa - Pagina 4

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Recommended Liquid & Vapor Tube Diameters (In.)

U nit

LIQ U ID

S ize

C onnection D ia. T ube D ia. C onnection D ia.

018

3/8"

024

3/8"

030

3/8"

036

3/8"

042

3/8"

048

3/8"

060

3/8"

*FIE LD S U P P LIE D 7/8 X 1 -1 /8 C O N N E C T O R R E Q U IR E D O N B O T H

E N D S O F V A P O R T U B IN G .

It is im portant that no tubing be cut or seals broken

until you are ready to actually m ake connections to the

evaporator and to the condenser section. DO NOT rem ove

rubber plugs or copper caps from the tube ends until ready

to m ake connections at evaporator and condenser. Under

no circum stances leave the lines open to the atm osphere

for any period of tim e, if so unit requires additional

evacuation to rem ove m oisture.

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 tim e will elim inate

future service problem s.

It is recom m ended that vertical suction risers not be

up-sized. Proper oil return to the com pressor should be

m aintained with suction gas velocity.

Installation of Line Sets

DO NOT fasten liquid or suction lines in direct contact

with the floor or ceiling joist.

suspension type of hanger. Keep both lines separate, and

always insulate the suction line. Long liquid line runs (30

feet or m ore) in an attic will require insulation.

refrigeration line sets to m inim ize length.

DO NOT let refrigerant lines com e in direct contact with

foundation. W hen running refrigerant lines through the

foundation or wall, openings should allow for a sound and

vibration absorbing m aterial to be placed or installed

between tubing and foundation.

foundation or wall and refrigerant lines should be filled with

a vibration dam ping m aterial.

If ANY refrigerant tubing is buried, provide a 6 inch

vertical rise at service valve.

lengths up to 36 inches m ay be buried without further

special consideration. For lengths above 36 inches,

consult your local distributor.

Before m aking braze connections, be sure all joints are

clean.

Before heat is applied for brazing, dry nitrogen

should be flowing through the tubing to prevent oxidation

and scale form ation on the inside of the tubing.

506162-02

V AP O R

T ube D ia.

3/8"

3/4

3/8"

3/4

3/8"

3/4

3/8"

3/4

3/8"

7/8

3/8"

7/8

3/8"

7/8

*1-1/8

Use an insulated or

Any gap between

Refrigerant tubing

The following is the recom m ended m ethod for m aking

braze connections at the refrigerant line connections:

Debur and clean refrigerant tube end with em ery

cloth or steel brush.

Insert tubing into swage fitting connection.

W rap wet rags over valves to protect from heat.

Allow dry nitrogen to flow through refrigerant lines.

Braze joint, using a suitable brazing alloy for copper

to copper joints.

Quench the joint and tubing with water using a wet

rag. Leave rag on fitting body and re-wet with water

to help cool area.

Leak Check

Refrigeration lines and indoor coil m ust be checked for

leaks

after brazing

recom m ended procedure is to apply a trace am ount of

vapor refrigerant (approxim ately two ounces or 3 psig) into

the line set and indoor coil, then pressurize with 150 psig

of dry nitrogen. Use a refrigerant leak detector to check all

joints. The system m ay also be checked for leaks using a

halide torch or pressure and soapy solution.

com pletion of leak check, relieve all pressure from system

before evacuation.

Evacuating And Charging Instructions

NOTE: Intentional release of CFC or HCFC refrigerant

to the atmosphere violates Federal Law . It may

also violate State and Local Codes. Check all

Federal,

proceeding.

Route

These outdoor units are pre-charged at the factory with

adequate refrigerant to handle 15 feet of refrigerant tubing.

NOTE: DO NOT use any portion of the charge for purging

or leak testing. It is m andatory that a thorough

evacuation of the refrigeration lines and indoor coil

be perform ed.

The liquid line and suction line service valves have been

closed after final testing at the factory. DO NOT disturb

these valves until the lines have been leak checked and

evacuated or the charge in the unit may be lost.

Connect the vacuum pum p to the center hose of the

m anifold gauge set, the low-pressure m anifold

gauge to the vapor service valve and the high

pressure m anifold gauge to the liquid service valve.

NOTE: Unnecessary switching of hoses can be avoided

and com plete evacuation of all lines can be

achieved by also connecting a branch hose from

the m anifold gauge center port to a cylinder of the

proper refrigerant.

valve to vacuum pum p to avoid contam inating

vacuum pum p oil with refrigerant.

Issue 0847

and

before

evacuation.

State

and

Local

Codes

Provide a separate shut-off

The

After

before

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