Section 7 | Refrigeration System |
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9.Follow the normal evacuation procedure, except replace the evacuation step with the following:
Important
Dry nitrogen is recommended for this procedure. This will prevent CFC release.
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 500 microns. Run the vacuum pump for 1/2 hour.
10.Charge the system with the proper refrigerant to the nameplate charge.
11.Operate the ice machine for one hour. Then, check the pressure drop across the suction line filter/drier.
A.If the pressure drop is less than 2 psi, the filter- drier should be adequate for complete cleanup.
B.If the pressure drop exceeds 2 psi, change the suction line
12.Operate the ice machine for
13.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
•High pressure
•High side access valve
•Low side access valve
Important
This is a required
1.Disconnect power to the ice machine.
2.Follow all manufacturer’s instructions supplied with the
!Warning
Do not unsolder a defective component. Cut it out of the system. Do not remove the
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
6.
NOTE: The pressure controls will operate normally once the tubing is
Part No. | Revised 8/2003 |
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