Friedrich WallMaster WCVT12B30A handleiding

Airco

Friedrich

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Handleiding

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R-32 SEALED SYSTEM REPAIR

Component Replacement/Brazing

• Warning: Ensure sufﬁcient ventilation at the repair place.

Warning: Presence of ﬁre extinguisher. If any hot work is to be conducted on the refrigerating equipment or any associated parts, have a ABC class ﬁre

extinguisher available to hand.

Warning: No person carrying out work in relation to a REFRIGERATING SYSTEM which involves exposing any pipe work shall use any sources of ignition in such a

manner that it may lead to the risk of ﬁre or explosion. All possible ignition sources, including cigarette smoking, should be kept sufﬁciently far away from the site of installation,

repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the equipment

is to be surveyed to make sure that there are no ﬂammable hazards or ignition risks.

Warning: Ensure there are no open ﬂame sources or hot surfaces that exceed 1200˚F in the work area.

NOTE: When brazing is required, the following procedures shall be carried out in the right order:

1. Remove and recover refrigerant, and evacuate the system. Refer to the refrigerant removal, recovery, and evacuation section of this manual.

Warning: Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch (or any other detector

using a naked ﬂame) shall not be used.

2. Perform a check of the work area for the presence of ﬂammable refrigerant prior to brazing or performing any hot work. Use a non-Sparking (Not Halide )

A2L certiﬁed Electronic Leak Detector rated for detecting R-32 refrigerant.

3. Re-pipe all repairs and install all components to sealed system.

NOTE: Sealed system repairs require the installation of a liquid line drier upstream of the condenser.

NOTE: Sealed system repairs to models with a heat pump require the installation liquid line drier on the cooling liquid line.

Refer to Figure 701 for installation location of liquid line drier on unit with heat pump.

4. Purge nitrogen through the unit. at approximately 2-3 psi through the duration of the brazing process. (Nitrogen must be purging through the unit while any

brazing is being performed.)

5. Pressure test unit to 550 psi minimum and hold pressure for 30 minutes minimum. Inspect for any leaks with a leak detection ﬂuid and repair as required.

Repeat as required until system passes leak test.

6. Triple evacuate the unit to achieve a 500 micron level.

7. Pressurize nitrogen to 550 psi and leak test all connections with a leak detection ﬂuid. Repair any leaks found.

8. Reassemble sealed enclosures accurately. If seals are worn, replace them.

9. Charge the system with the amount of refrigerant speciﬁed on the model nameplate.

Refer to the refrigerant charging section of this manual for charging

procedures.

Bekijk gratis de handleiding van Friedrich WallMaster WCVT12B30A, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.