Victory Reach-In Servisní příručka stáhnout pdf (Strana 58)

Section 6Refrigeration System

6-16

MILD SYSTEM CONTAMINATION

CLEANUP PROCEDURE

1. Replace any failed components.

2. If the compressor is good, change the oil.

3. Replace the liquid line drier.

NOTE: If the contamination is from moisture,

use heat lamps during evacuation. Position

them at the compressor, condenser and

evaporator prior to evacuation.

Important

Dry nitrogen is recommended for this

procedure. This will prevent CFC release.

4. Follow the normal evacuation procedure,

except replace the evacuation step with

the following:

A. Pull vacuum to 1000 microns. Break

the vacuum with dry nitrogen and

sweep the system. Pressurize to a

minimum of 5 psi.

B. Pull vacuum to 500 microns. Break

the vacuum with dry nitrogen and

sweep the system. Pressurize to a

minimum of 5 psi.

C. Change the vacuum pump oil.

D. Pull vacuum to 250 microns. Run the

vacuum pump for 1/2 hour on self-

contained models, 1 hour on remotes.

NOTE: You may perform a standing vacuum

test to make a preliminary leak check. You

should use an electronic leak detector after

system charging to be sure there is no leak.

5. Charge the system with the proper

refrigerant to the nameplate charge.

6. Operate the Reach-In unit.

SEVERE SYSTEM CONTAMINATION

CLEANUP PROCEDURE

1. Remove the refrigerant charge.

2. Remove the compressor.

3. Remove the liquid line drier.

4. Replace the TXV.

5. Wipe away any burnout deposits from

suction and discharge lines at compressor.

6. Sweep through the open system with dry

nitrogen.

Important

Refrigerant sweeps are not recommended, as

they release CFC’s into the atmosphere.

7. Install a new compressor and new start

components.

8. Install a suction line filter-drier (with acid

and moisture removal capability) of

adequate size. Place the filter drier as

close to the compressor as possible.

9. Install access valves at the inlet and outlet

of the suction line drier.

10. Install a new liquid line drier.

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