SOP-EMD-02 v3.3 Air-Conditioning Unit Maintenance_2

Tailin Abrasives Corporation

Air-Conditioning Unit Maintenance

Doc. Code:

SOP-EM-02

Rev. No.:

3.3

Eff. Date:

02-Jul-2012

Page No.:

1 of 4

I OBJECTIVE:

Taili ailin n Abra Abrasi sive ves s (Sub (Subic ic)) Co Corp rpor orati ation on prov provid ides es inst instru ruct ctio ions ns an and d Stan Standa dard rd Oper Operati ating ng Proc Proced edur ures es (SOP (SOP)) that that is used used to assu assure re ap appr prop opri riat ate e acti activi vity ty/i /ies es an and d proc proces esse ses s are are correctly performed.

II SCOPE: These These instruction instructions s are applicable applicable on different different types types of air conditionin conditioning g unit as forms drive through cross functional application inhibits.

III III DUTIES AND RESPONSIBILITIES: EMD Assistant Manager - Responsible to oversee and maintain strict compliance on the procedure. And ensure ensure the effectiveness of all controls and activities in order to prevent potential nonconformity. nonconformity. EMD Staff In-charge -- accountable  accountable to perform maintenance instruction preferably extend knowledge and experience on air-conditioning functionality while securing safety on its operational use.

IV PROCEDURE:

I. PREPARATION: PREPARATION: 1. TOOLS TOOLS AND UNIT UNIT PREP PREPARATIO ARATION N 1.1 Prepare high pressure spray pump or vacuum machine. 1.2 Prepare air-con coil cleaner and other chemical necessary for cleaning. 1.3 Secure the area to avoid accidental spraying of chemical / liquid which might cause short circuit of power lines. 1.4 Prepare various tools various tools such as screwdrivers, close and open wrench to adjust belts, paint brush etc. 1.5 Turn off the unit and power supply.

Reviewed b y

N. Espanol

Revised by

DCC

Approved b y

Date

02-Jul-2012

Date

02-Jul-2012

Date

E. Jose

Tailin Abrasives Corporation

Air-Conditioning Unit Maintenance

Doc. Code:

SOP-EM-02

Rev. No.:

3.3

Eff. Date:

02-Jul-2012

Page No.:

2 of 4

2. CLEANING PROCEDURE 2.1 Indoor Unit cleaning (Wet type cleaning) 2.1.1

Open the evaporator and fan cover.

2.1.2

Prepare the pump.

2.1.3

Spray on the evaporator on opposite direction of air flow in normal operation using coil cleaner and let it stay for 5 - 10 minutes.

2.1.4

Rinse with water thoroughly until water is clear.

2.1.5

Check drain pipes for clogging or leaks

2.1.6

Install fan and evaporator cover

2.1.7

Turn on power and let it run.

2.1.8

Observe air flow (flow should not be restricted to operate normally) if air flow is not sufficient follow fan checking, adjustment and repair procedure.

2.2  Indoor Unit cleaning (Air-con enclosure filter) 2.2.1 Turn off unit 2.2.2 Use paint brush and vacuum machine to clean the filter 2.2.3 Remove filter if necessary to clean it very well 2.2.4 Re-install filter and run the unit 2.2.5 Observe air flow pressure if normal

2.3 Fan checking, adjustment and repair procedure 2.3.1

Turn off the unit.

2.3.2

Open fan / blower cover.

2.3.3 Check rotary blower and clean if necessary. 2.3.4 Check belt tension (free play is ¾”) by pressing with thumb finger. Adjust belt if necessary. 2.3.5

Check motor appearance and pulley. Clean, re-tighten or replace parts if necessary.

2.3.6

Turn on power and run the fan.

Reviewed by

N. Espanol

Revised by

DCC

Approved by

Date

02-Jul-2012

Date

02-Jul-2012

Date

E. Jose

Tailin Abrasives Corporation

Air-Conditioning Unit Maintenance

Doc. Code:

SOP-EM-02

Rev. No.:

3.3

Eff. Date:

02-Jul-2012

Page No.:

3 of 4

2.3.7 Check ampere reading (should not exceed specified ampere rating on the motors nameplate) and follow motor replacement procedure if requiring replacement. 2.3.8

Install fan cover.

2.3.9 Turn on power and test run paying particular attention on its air flow pressure. 2.3.10 Observe the unit for 15 minutes before leaving.

2.4  Motor replacement procedure 2.4.1 Ensure that power and circuit breakers were turned off. 2.4.2 Prepare tools necessary for the job. 2.4.3 Check motor specification mark on its nameplate (use only the same motor specification). 2.4.4 Check motor wiring connection and write down or put some mark if necessary 2.4.5 Loosen its mounting bolts / screw and pull out the motor. 2.4.6 Follow the same procedure in dismantling motor in reverse order (first to remove last to install). 2.4.7 Turn on power and test run. Check its ampere reading. 2.4.8

Turn back cover.

2.4.9 Observe for 15 minutes before leaving.

2.5 Frequency of checking / cleaning 2.5.1

Storage Air-conditioning unit – Everyday

2.5.2

Office’s Air-conditioning unit – Every week

2.6 Outdoor Unit Cleaning Procedure 2.6.1

Turn off power

2.6.2

Disassemble cover (if present)

2.6.3

Prepare air-con coil cleaner and high pressure pump spray

Reviewed by

N. Espanol

Revised by

DCC

Approved by

Date

02-Jul-2012

Date

02-Jul-2012

Date

E. Jose

Tailin Abrasives Corporation

Air-Conditioning Unit Maintenance 2.6.4

Doc. Code:

SOP-EM-02

Rev. No.:

3.3

Eff. Date:

02-Jul-2012

Page No.:

4 of 4

Spray condenser coil with chemical and allow it to stay for 5 – 10 minutes ( keep spray away from electrical parts).

2.6.5

Rinse thoroughly with water

2.6.6

Install cover

2.6.7

Test run and monitor for 15 minutes before leaving the unit

Reviewed by

N. Espanol

Revised by

DCC

Approved by

Date

02-Jul-2012

Date

02-Jul-2012

Date

E. Jose