Victory Reach-In Manual de Serviço descarregar pdf (Página 59)

Section 6 Refrigeration System

6-17

11. 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. Change the vacuum pump oil.

C. Pull vacuum to 500 microns. Break

the vacuum with dry nitrogen and

sweep the system. Pressurize to a

minimum of 5 psi.

D. Change the vacuum pump oil.

E. 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.

12. Charge the system with the proper

refrigerant to the nameplate charge.

13. Operate the Reach-In unit for one hour.

Then, check the pressure drop across the

suction line filter-drier.

A. If the pressure drop is less than 1 psi,

the filter-drier should be adequate for

complete cleanup.

B. If the pressure drop exceeds 1 psi,

change the suction line filter-drier and

the liquid line drier. Repeat Steps 8

through 13 until the pressure drop is

acceptable.

14. Operate the Reach-In unit for 48-72 hours.

Then, remove the suction line filter-drier

and change the liquid line drier.

15. Follow normal evacuation procedures.

Replacing Pressure Controls Without

Removing Refrigerant Charge

This procedure reduces repair time and cost.

Use it when any of the following components

require replacement, and the refrigeration

system is operational and leak-free.

• High Pressure Cut-Out Control

• High Side Service Valve

• Low Side Service Valve

Important

This is a required in-warranty repair

procedure.

1. Disconnect power to the Reach-In unit.

2. Follow all manufacturer’s instructions

supplied with the pinch-off tool. Position

the pinch-off tool around the tubing as far

from the pressure control as possible. (See

Figure 6-5 on next page.) Clamp down on

the tubing until the pinch-off is complete.

WARNING

Do not unsolder a defective component. Cut

it out of the system. Do not remove the

pinch-off tool until the new component is

securely in place.

3. Cut the tubing of the defective component

with a small tubing cutter.

4. Solder the replacement component in

place. Allow the solder joint to cool.

5. Remove the pinch-off tool.

6. Re-round the tubing. Position the flattened

tubing in the proper hole in the pinch off

tool. Tighten the wingnuts until the block

is tight and the tubing is rounded. (See

Figure 6-5 on next page.)

NOTE: The pressure controls will operate

normally once the tubing is re-rounded.

Tubing may not re-round 100%.

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