Carrier 19FA Provozní pokyny stáhnout pdf (Strana 37)

HVAC Training

Page : 37 of 42

Title:

Chiller Maintenance

Lesson Plan

NMH30C000105

EO: 1. 6

Discuss the process for changing the refrigerant filters.

Introduction

In this objective the trainee discuss replacing the refrigerant filter.

Main Idea

Assess and address workplace hazards.

Verify the refrigerant has been transferred and the shell pumped down completely prior to

proceeding.

Refrigerant filter change out.

1) When changing out the refrigerant filters the refrigerant must be transferred and the shell pumped down

c om plet ely.

2) The cartridges used with the refrigerant filter conform to carrier specifications.

a) Four cartridges make up the filter dryer assembl y.

3) To remove moisture and other contaminants from the refrigerant the cartridge is made of desiccant.

4) New filter cartridges are stored in canisters. These should remain in the canister until ready to install.

a) Replace Gasket,

i) Care m ust be taken when scraping gasket out of gasket groove, any scratches or grooves must be

removed or leaks will accure.

i) Always soak the new gasket in new chiller oil before installing.

5) When removing the filter housing, disassemble and clean all internal parts thoroughly.

6) Remove filter drier blocks from packages and assemble into the filter housing as soon as possible after opening.

This will minimize the exposure time for the desiccant to absorb moisture and contaminants.

7) Replace the strainer screen in the filter drier core if required.

8) Place coupling in between cores (blocks).

9) Position felt pads between cores as directed by the vendor instructions.

10) Install assembly into shell with new flange gasket lubricated with new refrigerant oil.

11) Tighten bolts in a criss-c ross pat t ern.

Lesson Learned:

OE19424 - Repair and Installation of Centrifugal Chiller CUNO Filters

Manufacturer: Carrier Model 17FA401-504-48

Part Number: CT-102

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Carrier 19FA Provozní pokyny Strana 37