MICRO-AIR Artic Air 24 Guía de instalación descargar pdf (Pagina 25)

Tubing sizes

All tubing used in the installation should be clean/dehydrated soft copper refrigeration tubing.

This tubing is available from any refrigeration equipment supplier and most industrial supply

houses or directly from Glacier Bay. Do not use copper tubing designed for fuel or water - there

is a difference. Copper fittings from the local plumbing store can be used but will be referred to

as one size smaller than the refrigeration fittings (ie. a 1/2" refrigeration fitting is a 3/8" plumbing

fitting). Refrigeration tubing is sized by the outside diameter. Installation of your Glacier Bay

system requires the use of two sizes of refrigeration copper tubing - 1/4" and 1/2".

O.D. Tubing Function Pressure From To

1/4" Discharge - Liquid High Condensing Unit Control "T" Assembly

1/4" Discharge - Liquid High Control "T" Expansion Valves

1/2" Suction - Gas Low Evaporator Plate Condensing Unit

Making Soldered Connections

There is little doubt that soldering connections is the preferred method among experienced

refrigeration system installers. Once the technique is developed, soldering is both fast and

extremely reliable. If you are not confident in your soldering ability, buy 10 or so extra fittings of

various sizes from the hardware store and practice your technique. To ensure good solder

connections observe the following recommendations:

● De-burr the ends of the tubing in the same manner described for flared connections so

that refrigerant will flow smoothly through it. Ensure that the mating surfaces are clean

and free of oxidation by cleaning them with steel wool before applying flux.

● To prevent flux from entering the system, always apply flux to

the outside of the male half of the connection only -

never the female half.

● Use the proper solder and flux. DO NOT USE HIGH TEMPERATURE BRAZE

MATERIALS.* Also, avoid using solder from a plumbing supply store as these alloys are

not designed to withstand the operating pressures of your refrigeration system. The

recommended solder is a low temperature silver solder manufactured by the Harris

Company and called “Stay-Brite #8". The compatible paste flux for copper to copper

connections is called “Stay-Clean”. (JW Harris Company, 800-773-4533, Intl 937-778-

8515 or www.jwharris.com) Alternate solders can be used but must contain 2% to 4%

silver and/or nickel. These make considerably stronger joints than do common “50/50"

and “95/5" solders. Flux should be of the non-acid paste type. Do not use liquid acid-

based fluxes. (*Exception - Canadian and some European jurisdictions may require the

use of high temperature braze materials. If a high temperature solder is used, be sure to

purge the system with nitrogen first.)

(This is a Prestart Checkout Item)

● All soldering should be done with a propane torch. DO NOT USE ACETYLENE*. Protect

surrounding cabinetry and sensitive components from heat damage by covering them

with a wet (not just moist) heavy cotton rag. Be sure to cover everything near the joint to

be soldered as proper soldering technique requires that the joint be heated all the way

around. To protect overhead areas (such as the top of the ice box) place a wet rag

behind a piece of sheet metal which can, in turn, then be wedged into place. (*Exception

- Canadian and some European jurisdictions may require the use of high temperature

braze materials)

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