Carrier HVAC Unit 30GT315

Select the cleaning method used for the coils

Corrosive Environment Maintenance

Ensure coil cleaning is part of the planned maintenance schedule for corrosive environments

Clean all accumulations of dirt off the coil

Avoid using high-pressure water or air to prevent fin damage

Turn off all power to unit before servicing

Use field disconnect instead of ON-OFF switch on control panel

Is there sufficient pressure in the system for leak testing?

If there is no pressure, use standard refrigeration practices to search for the leak

Repair the leak using good refrigeration practices

Open and tag all electrical disconnects before any work begins.

Ensure the refrigerant is in the condenser by performing the following actions:

Close the shutoff valves in the cooler fluid lines, if installed.

Remove the cooler fluid piping.

Remove the cooler fluid-side strainer (130-210, 230A-315A, and 330A/B-420A/B only).

Open the air vent at the top of the cooler.

Open the drain on the bottom of the cooler to drain it.

Record the current oil level in the sight glass

Is the oil level within the acceptable range (1/8 to 3/8 of sight glass)?

Add Carrier-approved compressor oil if necessary

Verify that the oil level is now within the acceptable range

Brush gaskets with a light film of compressor oil

Ensure gaskets are not soaked to prevent deterioration

Use new gaskets within 30 minutes to prevent deterioration

Reassemble cooler nozzle end or plain end cover with the gaskets

Bolt Installation and Tightening