Installing Domestic Refrigeration and Air-Conditioning (DomRAC) Unit

COMPETENCY BASED
LEARNING MATERIAL

HOW TO USE THIS COMPETENCY BASED LEARNING MATERIAL

Welcome to the module inInstalling Domestic Refrigeration and Air-
Conditioning (DomRAC) Units.This module contains training materials and
activities for you to complete.

The unit of competency “Installing Domestic Refrigeration and Air-
Conditioning (DomRAC) Units"contains knowledge, skills and attitudes
required for aRefrigeration and Air Conditioning Servicing (DomRAC) NC
IIcourse. It is one of the specialized modules at National Certificate II (NC II)
level.

You are required to go through a series of learning activities in order to
complete each learning outcome of the module. In each learning outcome are
Information Sheets and Resources Sheets (Reference Materials for further
reading to help you better understand the required activities). Follow these
activities on your own and answer the self-check at the end of each learning
outcome. You may remove a blank answer sheet at the end of each module (or
get one from your facilitator/trainer) to write your answers for each self-check.
If you have questions, don‟t hesitate to ask your facilitator for assistance.

Recognition of Prior Learning (RPL)

You may already have some or most of the knowledge and skills covered in
this learner's guide because you have:

been working for some time
already completed training in this area.

If you can demonstrate to your trainer that you are competent in a particular
skill or skills, talk to him/her about having them formally recognized so you
don't have to do the same training again. If you have a qualification or
Certificate of Competency from previous trainings, show it to your trainer. If the
skills you acquired are still current and relevant to the unit/s of competency
they may become part of the evidence you can present for RPL. If you are not
sure about the currency of your skills, discuss this with your trainer.

This module was prepared to help you achieve the required competency, in
Refrigeration and Air Conditioning Servicing (DomRAC) NC II. This will be
the source of information for you to acquire knowledge and skills in this

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particular trade independently and at your own pace, with minimum
supervision or help from your instructor.

 Talk to your trainer and agree on how you will both organize the Training of
this unit. Read through the module carefully. It is divided into sections,
which cover all the skills, and knowledge you need to successfully complete
this module.

 Work through all the information and complete the activities in each section.
Read information sheets and complete the self-check. Suggested references
are included to supplement the materials provided in this module.

 Most probably your trainer will also be your supervisor or manager. He/she
is there to support you and show you the correct way to do things.

 Your trainer will tell you about the important things you need to consider
when you are completing activities and it is important that you listen and
take notes.

 You will be given plenty of opportunity to ask questions and practice on the
job. Make sure you practice your new skills during regular work shifts. This
way you will improve both your speed and memory and also your confidence.

 Talk to more experience workmates and ask for their guidance.

 Use the self-check questions at the end of each section to test your own
progress.

 When you are ready, ask your trainer to watch you perform the activities
outlined in this module.

 As you work through the activities, ask for written feedback on your
progress. Your trainer keeps feedback/ pre-assessment reports for this
reason. When you have successfully completed each element, ask your
trainer to mark on the reports that you are ready for assessment.

 When you have completed this module (or several modules), and feel
confident that you have had sufficient practice, your trainer will arrange an
appointment with registered assessor to assess you. The results of your
assessment will be recorded in your competency Achievement Record.

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NATIONAL CERTIFICATE LEVEL II

QUALIFICATION LEVEL

COMPETENCY-BASED LEARNING MATERIALS

NO CORE COMPETENCIES MODULE TITLE CODE

Install Domestic Installing Domestic

1 Refrigeration and Air- Refrigeration and Air- HVC723337
Conditioning Conditioning

(DomRAC) Units (DomRAC) Units

Service and Maintain Servicing and

Domestic Refrigeration Maintaining Domestic
2 and Air-Conditioning Refrigeration and Air- HVC723338

(DomRAC) Units Conditioning (DomRAC)

Units

Trouble shoot Domestic Trouble shooting

3 Refrigeration and Air- Domestic Refrigeration

Conditioning (DomRAC) and Air-Conditioning HVC723339

Units (DomRAC) Units

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MODULE CONTENT

UNIT OF COMPETENCY:Install Domestic Refrigeration and
Air-Conditioning (DomRAC) Units

MODULE TITLE:Installing Domestic Refrigeration and
Air-Conditioning (DomRAC) Units

MODULE DESCRIPTOR:

This unit covers the knowledge, skills and attitudes required to safely
install and test domestic refrigeration and air-conditioning (DomRAC) units. It
includes conducting survey for installation, installing DomRAC unit and its
electrical circuit as well as conducting performance testing.

NOMINAL DURATION: Hours

LEARNING OUTCOMES:

At the end of this module you must be able to:

- Conduct Survey
- Install DomRAC Electrical Circuit
- Install DomRAC Unit
- Conduct Performance Test

ASSESSMENT CRITERIA:

 Scope of work is determined based on work instructions

 Location for installation are identified based on work instructions

 Tools equipment needed are selected in line with job requirements

 Unit is inspected in accordance with the prescribed procedure
 Unit defects are reported as per prescribed procedure

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 Electrical installation is checked for compliance with the latest
edition of the Philippine Electrical Code

 Electrical installation is tested and compared with the units power
requirement

 Dimensions for cavity is identified based on work instruction

 Layout is prepared before cutting the cavity in line with work
instruction and prescribed procedure

 Cutting of cavity is done in line with the prescribed procedure and
work instruction

 Cavity sides are finished, leveled and plumbed in line with work
instruction and prescribed procedure

 Electrical materials, tools and equipment are prepared according to
job requirements.

 Electrical components are rigidly installed in building structures.

 Installed electrical circuit is tested according to standard
procedures.

 Electrical installation is done in accordance with the latest provision
of PEC.

 Unit is mounted inside the cavity in accordance with the prescribed
procedure

 Sealant is installed to ensure airtight seal around the unit in line
with work instruction

 Installed unit is tested for operation in line with prescribed
procedure

 Drainage system is installed based on work instruction

 Work documentation is prepared and submitted as per prescribed
procedure

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 Good housekeeping and safety practices is applied in line with job
requirements

Qualification Levels:

Trainees Qualifications:

- At leastHigh School Graduate
- 16 years of age
- With good moral character
- Has passed the aptitude test given by the Center
- Physically and mentally fit for training
- Has no criminal records
- Can communicate in oral and written form
- Can perform basic mathematical computation

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LEARNING OUTCOME SUMMARY

Learning Outcome #1: CONDUCT SURVEY
CONTENTS:

 DomRAC Installation Requirements
- Air circulation/ventilation requirements
- Drain disposal requirements
- Power supply requirements
- Structural and architectural requirement
- Provision for serviceability

 Tools equipment and materials needed in installing DomRAC
 Survey Inspection Report

CONDITIONS:

Students/trainees must be provided with the following:
 Learning elements, manuals and materials
 Tools, equipment, supplies and materials
 PPE

TRAINING FACILITY TOOLS AND ACCESSORIES

● Access to survey site ● Hacksaw
● Push-pull rule
●Tri-square
● Plum bob
● Spirit level
● Water hose
● Cross cut saw
● Chisel
● Hammer
● Masonry tools

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SUPPLIES AND MATERIALS LEARNING MATERIALS

● Bond paper ● Work plan
 Board Marker ● Brochure
 Survey Form  Catalogue
 L.E on drawing electrical and

mechanical diagrams
 Fundamentals of Refrigeration

METHODOLOGIES:

● Self-paced instruction
 Film viewing
 Group discussion
 E-learning

ASSESSMENT METHODS:

●Interview Written examination
 Observation with questioning
 RPL


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Learning Outcome #2:INSTALL DomRAC ELECTRICAL CIRCUITS

CONTENTS:

 Wires and cables used in electrical wiring
 Classes of outlet/switches boxes used in electrical wiring (PEC)
 Enclosure and their conditions for use
 Types of devices used in electrical wiring
 Identifying wall plugs and masonry bolts
 Drilling into masonry using portable electrical drill
 Marking out using spirit level /water level
 Use of electrical measuring instruments
 Testing electrical circuits

CONDITIONS:

Students/trainees must be provided with the following:
 Learning elements, manuals and materials
 Tools, equipment, supplies and materials
 PPE

EQUIPMENT TOOLS AND ACCESSORIES

● Multi-meter ● Set of pliers
● Portable electric drill ● Hammer
● Portable disc grinder ● Spirit level, water hose
●Plumb bob
●Cross cut saw
●Pusg-pull rule
●Tri-square

SUPPLIES AND MATERIALS LEARNING MATERIALS

● Masonry drill ● Work plan
●Hacksaw ● Brochure
●Electrical railways  Safety practices
●Circuit braker  Drawing mechanical
●Masonry
●Expansion bolt andelectrical
 Diagrams, types of wire, etc.

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●Elecrical cable  Work safety
●Convenience outlet  Proper handling of tools
 Communicating effectively
INSRUMENT

● Test light
● Megger
● Multi-tester

METHODOLOGIES:

● Self-paced instruction
 Film viewing
 Group discussion
 E-learning
 Direct laboratory experience

ASSESSMENT METHODS:

● Interview
 Written examination
 Observation with questioning
 Demonstration with questioning

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Learning Outcome #3 INSTALL DomRAC UNIT

CONTENTS:

 Refrigeration cycle
 Aircon/Refrigerator components and accessories
 Sealant and insulation
 Fastening devices
 WAC installation procedure
 Basic plumbing

- Types of PVC drain pipes
- Types of PVC fittings
 Safety practices

CONDITIONS:

Students/trainees must be provided with the following:
 Learning elements, manuals and materials
 Tools, equipment, supplies and materials
 PPE

EQUIPMENT TOOLS AND ACCESSORIES

● Portable electric drill ● Hacksaw
● Portable disc grinder ● Push-pull rule
● Tri-square
 Welding equipment ● Plum bob
 Air-cond unit ● Spirit level
● Water hose
● Cross cut saw
● Chisel
● Hammer
● Masonry tools

SUPPLIES AND MATERIALS PERSONAL PROTECTIVE
EQUIPMENT
●Concrete disc
●Masonry drill bit Date: Developed Date: Revised Page #

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● Hacksaw blade LEARNING MATERIALS
● Masonry
● Marker, pen
● Bond paper

METHODOLOGIES:

● Self-paced instruction
 Film viewing
 Group discussion
 E-learning
 Direct laboratory experience

ASSESSMENT METHODS:

● Interview
 Written examination
 Observation with questioning
 Demonstration with questioning

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Learning Outcome #4 CONDUCT PERFORMANCE TEST

CONTENTS:

 Measuring air circulation and velocity
- Velometer/anemometer

 Temperature testing
- Thermometer

 Current and voltage measurement
- Clamp ammeter

CONDITIONS:

Students/trainees must be provided with the following:
 Learning elements, manuals and materials
 Tools, equipment, supplies and materials
 PPE

EQUIPMENT TOOLS AND ACCESSORIES

● Refrigerator Unit ● Hacksaw
● Air-con Unit ● Push-pull rule
● Tri-square
● Plum bob
● Spirit level
● Water hose
● Cross cut saw
● Chisel
● Hammer
● Masonry tools

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METHODOLOGIES:

● Self-paced instruction
 Film viewing
 Group discussion
 E-learning
 Direct laboratory experience

ASSESSMENT METHODS:

● Interview
 Written examination
 Observation with questioning
 Demonstration with questioning

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Learning Experiences

DETERMINE LEARNER’S TRAINING REQUIREMENTS

Learning Activities Special Instructions

L.O. 1 Compare answer with Answer Key

1. Read Information Sheet # 1.1-1 Compare answer with Answer Key
Conduct Survey Evaluate Using Performance criteria
checklist
Answer Self-Check #1.1-1
Assignment Sheet #1.1-1 Compare answer with Answer Key
Evaluate Using Performance criteria
2. Read Information Sheet #1.1-2 checklist
Answer Self-Check #1.1-2
Perform Task Sheet #1.1-2 Compare answer with Answer Key
Evaluate Using Performance criteria
Assignment Sheet #1.1-2 checklist
3. Read Information Sheet #1.1-3
Answer Self-Check #1.1-3 Compare answer with Answer Key
Perform Task Sheet #1.1-3 Evaluate Using Performance criteria
checklist
Assignment Sheet #1.1-3
4. Read Information Sheet #1.1-4 Compare answer with Answer Key
Answer Self-Check #1.1-4 Evaluate Using Performance criteria
checklist
Perform Task Sheet #1.1-4
Compare answer with Answer Key
Assignment Sheet #1.1-4 Compare answer with Answer Key
5. Read Information Sheet #1.1-5
Answer Self-Check #1.1-5
Perform Task Sheet #1.1-5

Assignment Sheet #1.1-5
6. Read Information Sheet #1.1-6
Answer Self-Check #1.1-6
Perform Assignment Sheet #1.1-6

L.O.2

1. Read Information Sheet #1.2-1
Install DomRAC Electrical circuit

Answer Self-Check #1.2-1
2. Read Information Sheet #1.2-2
Answer Self-Check #1.2-2

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3. Read Information Sheet #1.2-3 Compare answer with Answer Key
Answer Self-Check #1.2-3
Compare answer with Answer Key
Assignment Sheet #1.2-3
4. Read Information Sheet #1.2-4 Evaluate Using Performance criteria
Answer Self-Check #1.2-4 checklist
5. Read Information Sheet #1.2-5
Evaluate Using Performance criteria
Assignment Sheet #1.2-5 checklist
Perform Task Sheet #1.2-5
Evaluate Using Performance criteria
6. Read Information Sheet #1.2-6 checklist
Assignment Sheet #1.2-6 Evaluate Using Performance criteria
checklist
L.O.3 Evaluate Using Performance criteria
checklist
1. Read Information Sheet #1.3-1 Evaluate Using Performance criteria
Install DomRAC Unit checklist
Perform Task Sheet #1.3-1 Evaluate Using Performance criteria
checklist
Perform Assignment Sheet #1.3-1

Perform Assignment Sheet #1.3-2

Perform Assignment Sheet #1.3-3

Perform Task Sheet #1.3-2

L.O.4

2. Read Information Sheet #1.4-1
Conduct Performance Test

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Information Sheet # 1.1-1

LO 1: CONDUCT SURVEY

Learning Objectives: In a refrigeration and air conditioning shop scenario, the
trainee will be able to discuss the most appropriate area and suggested
provisions in installing window-type air-conditioning unit, and survey the
location for installation of air conditioning unit.

Selecting an Area for Installation:

In selecting an area for installation, the following should be avoided to
preventdamage or harmful effect to the unit:

 Greasy areas (e.g. areas near a machine)
 Salty areas (e.g. places/areas near the coast )
 Areas where sulfuric gas is present ( such as hot spring areas)
 Areas near flammable gas (e. g. LPG)

The following are general rules which needs to be considered in installing
window-type air-condition unit

a. It is important that the location selected where the unit will be placed
suits the customer‟s needs.

b. Install the unit in an area with good ventilation. Any obstacles
affecting theairflow near the air inlet and the air outlet will cause

blockage tothe airflow.

c. Install the unit away from heat or vapor.

d. Install the unit in an area away from television and audio units,
cordlessphones, fluorescent lighting fixtures and other electrical
appliances (at least 1meter clearance). This is to eliminate or reduce
interference to other unit generated by the motors running from air-
cond,

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e. Install the unit in an area that provides easy drainage for condensed
water.

f. Install the unit in an area not exposed to the rain or direct sunlight.
(Install aseparate sunblind if exposed to direct sunlight.)

g. Fix the unit firmly if it is mounted in a high place. See to it that the
area would be able to endure the vibration from the unit.

h. Install the unit where it will not cause neighbors to suffer hot wind
and noisegenerated by the unit.

i. Install the unit where power source conforms with the units power
requirements.

The illustration below shows the general provisions in installing window-
type air-conditioning unit that may help us select the appropriate area for
installation.

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Self-Check #1.1-1

LO 1: CONDUCT SURVEY

Test what you have learned about the selecting area for installation of window
type air conditioning unit.

Direction: Read the questions carefully. Write the letter of the best answer on
the space provided.

1. What is the most important thing to consider in selecting an area for
the installation of window-type air-conditioning unit?

a. Select an area that allows good drainage for condensed water
b. Select an area that is in high place.
c. Select an area where source power supply is nearest.
d. Select area based on the needs of the client

2. To give better servicing space, the distance between the top part of

the unit from the ceiling should be not less than _____________.

a. 10 cm c. 20 cm

b. 15 cm d. 25 cm

3. Why is there a need to have at least 15 cm open space at the sides of
the unit when installed?

a. To allow better air circulation for the unit.
b. To allow better servicing space for the unit.
c. To have a better design for the installation
d. To have tolerance in the installation

4. Why is there a need to fix the unit firmly when installed in high places?
a. So that it would not fallb. So that it would endure vibration
c. So that it would not vibrated. None of the above

5. Why should you avoid placing the unit‟s backside of away from your
neighbors?

a. To allow better air circulation
b. To prevent the unit from blowing hot air on your neighbors
c. To allow better servicing space
d. To have better drainage

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LO 1: ANSWER KEY #1.1-1
Self-Check #1.1-1

CONDUCT SURVEY

1. D
2. B
3. A
4. C
5. B

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ASSIGNMENT SHEET #1.1-1

LO 1: CONDUCT SURVEY

Determining the Most Common Location
Where Window-type Air-conditioning Units are usually installed

After learning the things that needs to be considered in selecting the area
for the installation of window-type air-conditioning you are to perform another
activity that will give you idea what is the usual practice in installing window-
type air conditioning unit. Below are the instructions that you need to follow.

1. Get permission from your trainer; inform him that you are to conduct
survey of installed window-type air-conditioning unit for him to give you
necessary assistance.

2. Conduct an interview with a refrigeration and air-conditioning
technician practitioner. Ask him about the following question

a. How long have you been practicing this profession?

______________________________________________________________________

b. In installing window-type air-conditioning unit, where do you usually
place the unit? In the wall? In the window? Others? Why?
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________

c. If given a chance, you were to install the unit in a wood surface, concrete
surface or window sills, where would you install the unit? Why?

d. What is the usual elevation of the unit, 1 m above the ground? 1.5 m
above the ground? 2 m above the ground? Why?
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________

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e. Where do you usually place the back part of the unit? Do you allow
restriction to the airflow?

___________________________________________________________________________
___________________________________________________________________________
____________________________________________________________

f. What do you do to eliminate condensed water from dripping and
cause disturbance to others?

3. After conducting the interview, look for a house which has an air
conditioningunit installed. Observe the installation of the unit. Answer
the following questions?

a. Where is the unit installed? Is it in the wall or in a window sill?
___________________________________________________________________________
___________________________________________________________________________
__________________________________________________________

b. How high away is the base of the unit from the floor?
___________________________________________________________________________
___________________________________________________________________________
____________________________________________________________

c. Is there any restriction for airflow in the sides, and back part of the
unit?
___________________________________________________________________________
___________________________________________________________________________
__________________________________________________________

d. Does it have proper drainage system?
___________________________________________________________________________
___________________________________________________________________________
____________________________________________________________

e. Is it installed in a way that it will disturb others?

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f. Based on what you have learned from the factors that needs to be
considered in installing window type air-conditioning system, is the unit
installed properly? Support your answer?

___________________________________________________________________________
________________________________________________________________-

4. Based on your interview and your observation give your idea what is the
most suited area for the unit to be installed in terms of location, type of
surface where the unit will be mounted, elevation, drainage and others.

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ASSIGNMENT SHEET #1.1-1

LO 1: CONDUCT SURVEY

Survey area for installation

On the past activities you have found out that window-type air-
conditioningunits can be installed in the wall concrete or wood and in window
sills. In every type of surface different preparations must be made that‟s why in
practice before the unit is installed, a survey at the area is conducted. The
purpose of this survey is to select the most appropriate location of the unit to be
installed, to identify the needed preparation to be done before installation and to
identify the needed materials, tools and equipment.

In this activity you will be doing a simulated survey and you will be
selectingthe most appropriate location for installation and identifying the
needed materials, tools and equipment.

Your tasks are:

1. Ask your trainer for the location of the room where he wants the unit to be
installed.

2. Survey the room and select for the most appropriate location of the unit to be
installed.

3. List down the needed materials, tools and equipment for this job.

4. After identifying the location, the needed materials, tools and equipment for
this job,let your trainer check your work.

You will be asked by your instructor, the reason for choosing that
particularlocation for installation, and why do you need the materials, tools and
equipment thatyou listed. Good Luck!

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Information Sheet # 1.1-2

LO 1: CONDUCT SURVEY

Learning Objectives: In an refrigeration and air conditioning shop scenario, the
trainee will be able to discuss the important factors that needs to be considered
in performing the preliminary inspection of the unit before installation. It also
discuss the basic parts and accessories included in one package, the physical
defects of new and used window-type air-conditioning unit and the compatibility
of the unit with the power source.

Pre- inspection of Window-type Air-conditioning Unit:

Before installing the air-conditioning unit, preliminary inspections
should be done to ensure that the unit„s parts are complete, its body is in good
condition and the unit is in good operational condition.

Basically, the air-conditioning unit package has the following parts:

a. air-conditioning unit

b. front panel

c. air-filter

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d. housing

Brand new units have the basic components and some of the
following:

a. foam

b. brackets

c. screws

d. drain pan

e. remote control

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For brand new units, you need to inspect whether the unit„s parts are
complete. You may do this by comparing the actual parts by what is listed in
the manual. You should check for paint for scratches or *dents in the body
and/or housing. If there are some defects found in the unit or lacking of parts,
it is important to inform your local distributor to avail warranty services. They
will be happy to help you because its part of their service.

For used units, you need to check the base plate of the unit for defects or
corrosion. Defective or corroded base plate may cause misalignment of the
mechanical parts of the air-con (usually the fan blade) when installed and
operated. It may also reduce the lifespan of the unit if not remedied.

Lastly, you need to make sure that the unit is compatible to the power
source. In the Philippines, we have the standard power source is 220 volts 60
Hz AC. In case the unit„s power requirement is not the same as the power
source, step-down transformer may be used.

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Self-Check #1.2

LO 1: CONDUCT SURVEY

Test what you have learned about the pre inspectingAir-conditioning unit before
installation

Direction: Read the questions carefully. Write the letter of the best answer on
thespace provided.

1. What are the basic parts of the air-conditioning unit that needs to be
checked before installation?
a. The unit, front panel, housing, air-filter and steel brackets
b. The unit, front panel, housing, air-filter, steel brackets and screws
c. The unit, front panel, housing and air-filter
d. The unit, front panel, housing, air-filter, steel brackets, screws foams,
drain pan and remote control

2. In inspecting used air-conditioning unit, you must check the base plate of
theunit for defects because it may cause __________.

a. continues oxidation to the body of the unit
b. misalignment, which may cause restriction to the movement of fan blade.
c. restriction to the flow of liquid condensate
d. unattractiveness to the design of the unit

3. When checking brand new units for physical defects you should look

for ____________.

a. scratches c. both a and b

b. knocks d. None of the above

4. What will you do if a brand new air conditioning unit is found for defects?
a. Try to remedy it by your self so as not to trouble the dealer
b. Inform the dealer to avail warranty services
c. Disregard minor defects. Inform only the dealer of major defects.
d. Contact qualified service personnel and have your unit serviced.

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5. Why do you need to compare the power requirement of the unit with the
powersource before installation?
a. To make necessary adjustment, if needed
b. To make sure that the unit is compatible with the power source.
c. To make stop the work when the power source is not compatible with the
unit‟s requirement
d.None of the above

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LO 1: ANSWER KEY #1.2

CONDUCT SURVEY

1. C.
2. B.
3. C.
4. B
5. A

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TASK SHEET 1

Title: Performing pre-inspection of air-conditioning
unit to be installed

Performance Objective: In air conditioning shop scenario, the trainee
must be able to inspect the physical condition of the unit; test the
operational condition of the unit;described the importance of performing pre-
testing procedure before installing the air-condition unit; report result of
inspections

Supplies/Materials: Checklist for pre-inspection of the air-con; pencil or
Pen and Paper; unit‟s Service Manual/Owners Manual*

Equipment : Window-type Air-conditioning unit; multi-
Meter

Tools: Extension cord; universal Plug coupler

Personal Protective Equipment: Gloves, mask, goggle, safety
shoes

Steps/Procedure:

Inspection procedure for new window-type air-conditioning units

1. Unpack the unit from the box or container.

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2. Check the air-con parts and accessories
included in the package. Use the user‟s
manual as reference. Contact your
dealer for any missing parts or
accessories.

3. Inspect the unit for noticeable physical
defects like dents and scratches. Report
them to your dealer, if there are any.

Inspection procedure for used window-type air-conditioning units

1. Check the air-con parts and
accessories (cover and filter)

whichare supposedly included
in thepackage.

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2. Inspect the base plate/pan and the
housing of the air-con. The base
should be strong enough to support
the weight of the air-con unit when
installed. An indication of good
base plate is that the unit should
not bend or twist when one side is
lifted.

The housing should also be
in good condition, enough to cover
the components of the air-con or it
should not restrict any air passage
or drainage of the unit. If any
defects from the base and housing
are present, fix them first before
installing the units. (Refer to
module in servicing and maintaining
window-type air conditioning unit.)

Procedure in Testing Window-type Air-condition Unit

It is important to test the unit first before installing it on to the wall
permanently. This will help you ensure that the unit is in good condition.
Doing so will also save you time, energy and resources. Imagine yourself
installing the unit without testing first and pulling it out from the cavity
because it is found defective. How would you feel?

Below are the steps in testing the unit:

1. Check the supply requirement
of the unit. The source line for
the unit should be the same or
within the tolerable limit of the
supply requirement. In the
Philippines,our source line is
220 volts 60 Hz; before using
the unit for this supply, check

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if it is for 220 volts 60 Hz also.
In case the source is greater than
the required supply, step-down
transformers should be used to
reduce the source line.

2. Set the air-con unit on the
floor or any flat base. Make
sure that the unit is flat or
else, the housing will be
misaligned. This may cause
restriction to the movement
of blade when powered on.

3. Manually rotate the fan blade
of the unit while on the floor
or flat base to make sure
that the blade would rotate
smoothly.

4. Check the resistance of the
unit by connecting the test
probe of the tester to the
two line terminals of the
unit‟s plug.

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a. When the air-con is off,
high resistance/infinite
should be measured.

b. When the air-con is
switched on to fan
mode, resistance could
be measured but not to
the point that the meter
would indicate zero
resistance.

c. When the air-con is switched
on to low cool or in any setting
wherecompressor is expected
to run, the resistance of the
unit would become lower
(almost zero ohm to some units).

Theoretically the unit is still in
good condition because the
compressoris a highcurrent
device.Itsresistance in direct

current signal is verylow.
Therefore, it isadvisable that
your source must be protected

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(with fuse or circuit breaker)
in casethe compressor is
really defective. This is to
prevent further damage to the
unit and your electrical system.

5. If you‟re sure that the unit is
not shorted, switch the air con
off then plug it. Make
sure that the plug is suited to
the convenient outlet, if not;
plug coupler can be used
temporarily.

6. Switch-on the unit into fan
mode, Observe if the fan
blade would rotate smoothly.
Sluggish or screeching
sound will be heard on the
unit if the blade movement is
restricted. If your unit is
brand new, contact your
dealer for warranty services.

If your unit is not new, do
necessary corrective actions
(Refer to module in servicing
and maintaining window-type
air-conditioning unit).

7. Connect clamp tester on one line Date: Developed Date: Revised Page #
of the service cord in order to
measure the current drawn by the
unit both in fan mode and cooling
mode. Refer to nameplate F.L.A.
High amperage reading indicates
defective fanmotor.

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Necessarycorrective action should be
performedfirst before installing

the unit.

8. If the blade runs smoothly, wait
for about 5 minutes then try
switching the unit into low cool.
You will be hearing another sound,
which only indicates that the
compressor motor is now running.
Measure again the current then
refers to nameplate F.L.A. High
amperage reading indicates
defective compressor motor.
Necessary corrective action should
be performed first before installing
the unit.

9. Feel the outlet of air for change in
temperature (fromwarm air to slightly
cold air). If there is a change in
temperature, the unit isworking
properly. If there isno change at all
and your unit is brand new, contact
your dealer to avail of the service
warranty, if your unit is not brand new,
do the necessary actions to rectify
the defects (Refer to module in
troubleshooting window type air-condition
unit).

10. If the unit is working properly, the unit
can now beswitched-off and unplugged.
It is now ready to be installed.

Assessment Method:

Demonstration, Evaluate Using Performance criteria checklist

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Performance Criteria Checklist YES NO

Task Sheet #1
CRITERIA

Did I..

 Select Tools equipment needed in line with job
Requirements

 inspectUnit is in accordance with the prescribed
Procedure
 reportUnit defects as per prescribed procedure

 check for Electrical installation compliance with the

latest edition of the Philippine Electrical Code

 testElectrical installation is and compared with the

units power requirement

 Assessment Result:

Competent Not Yet Competent

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LO 1: ASSIGNMENT SHEET #1.1

CONDUCT SURVEY

Performing Pre-inspection of Air-Conditioning
Unit to be installed

After learning the procedure in inspecting a window-type air-conditioning
unit, you will be performing the activity on your own.

1. Inform your instructor when you are ready to inspect a window-type air
conditioningunit. He will be assigning you an air-conditioning unit to check.

2. Check the unit based on the information that you have learned on the
previous activity and record your answer in the checklist in performing pre
inspection ofwindow type air-conditioning unit.

3. After completing the inspection let your instructor check your work.

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Checklist for Pre-inspection of Window-type Air-conditioning
Unit

If there is a NO answer in the status, recommendations or remedy
should be provided so that corrective actions could be done before installing the
unit to the cavity. This is to ensure that your effort and time will not be wasted
when the unit is found out to be defective after being installed.

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Information Sheet # 1.1-3

LO 1: CONDUCT SURVEY

Learning Objectives: In an air conditioning shop scenario, the trainee will be
able to select appropriate location for the air-conditioning unit to be
installed,layout mounting location of the air-conditioning unit based on working
drawing, get the dimension of the air-conditioning unit and apply 5S.

When summer approaches we all start to think of those awful hot windless
nights when we cannot get to sleep and wish we had an air conditioner. Many of
us work in an air conditioned workplace, then drive home in an air conditioned
car then when we get home we have to face the reality of no air-con. Well you
don't have to; there are lots of different types of air conditioners around that you
can use to help keep you cool in summer and warm in winter. The type of air
conditioner that you choose will not only depend on your budget but what type
can actually be installed in your home and suits your needs.

The first thing you have to do is to ask yourself what parts of your home do you
want air conditioned? Do you just want the bedrooms air conditioned or would
you rather the living room to be air conditioned. Do you have a home office that
need air conditioning as well? Do you want several rooms or even the whole
house air conditioned?

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Self-Check #1.1-3

LO 1: CONDUCT SURVEY
Check you mastery of ______________ by completing the questions/tasks below.
I. List down the tools that fall under of each of the following:

A. Holding Tools: C. Personal Protective Equipment:

1. ______________ 1. ________________
2. ______________ 2. ________________
3. ______________ 3. ________________
4. ______________ 4. ________________
5. ______________ 5. ________________
6. ______________
7. ______________
8. ______________
9. ______________
10. ______________

B. Equipments:

1. ______________
2. ______________
3. ______________
4. ______________
5. ______________

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ANSWER KEY #1.1-3
Self-Check #1.1-3

LO 1: CONDUCT SURVEY

A. Holding Tools: C. Personal Protective
Equipment:
1. Hacksaw
2. Push-pull rule 1. Helmet
3. Tri-square 2. Goggles
4. Plum bob 3. Gloves
5. Spirit level 4. Mask
6. Water hose 5. Working clothes
7. Cross cut saw 6. Safety shoes
8. Chisel
9. Hammer 1.
10. Masonry tools

B. Equipments:

1. Portable electric drill
2. Portable disc grinder
3. Welding equipment
4. Air-con unit

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Title: TASK SHEET 1.2
Lay Out Cavity Dimension of an Air conditioning Unit

Performance Objective: In air conditioning shop scenario, the trainee
must be able to select appropriate location for

the air-conditioning unit to be installed,layout
mounting location of the air-conditioning unit
based on working drawing, get the dimension
of the air-conditioning unit and apply 5S.

Supplies/Materials : Pencil or pen and marker, installation plan or
working drawing, unit‟s specification manual

Equipment : Window-type air-conditioning unit

Tools:Pull-push rule, spirit level bar
Personal Protective Equipment: Gloves

Steps/Procedure:

Laying out or marking the location of air-con to be installed is
the processof transferring the data from the installation plan or
working drawing into the wallwhere the unit will be installed. The
purpose of this is to eliminate the risk ofcommitting error while
cutting through the wall.

If you already have a working drawing with complete
specification(measurements, sizes and locations in the floor plan)

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there is no need tomeasure the dimension of the air-conditioning
unit and find a suitable location(wall location and positioning).

All you have to do is set the reference line whereall the
measurement will start then draw the line which will form the
layout.

If there is no working plan, we can start with step no 1 but if
workingplan is available proceed to step no. 3.

1. Get the dimension of the air-condition
unit to be installed.

a. Measure the height of the unit.

b. Measure the width of the unit.

2. Select the appropriate location and
position for the air-condition unit (refer
to information sheet about selecting
an area for installation).

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3. Read your working plan and take noteof the following data:

Note: In measuring, consider the tolerance between the cavity and the

housing. For concrete, at least 5.5 cm forfinishing plaster, 3 mm
for other surfaces.

4. Measure the elevation of the cavity.
Mark this as point A.

5. Measure the distance of the cavity
from the adjacent wall.

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6. From the point A, draw the base line
of the cavity. Use a bar level to ensure
levelness of the base to the ground.
Make sure that the bubble in the level
is at the center of the tube.

7. Place the level bar across the base
line. Again, make sure that the bubble
in the level is at the center of the tube
to ensure perpendicularity of this line
with the base line. Draw a vertical line.

8. Finalize the base line by measuring
the required width of the cavity along
this line and marking it (consider the
mark as end of the line).

9. Finalize the vertical line by measuring Date: Developed Date: Revised Page #
the required height of the cavity along
this line and marking it (consider the
mark as end of the line). This line will

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now represent the cavity side near the
adjacent wall.

10. Place the edge of the level bar
horizontally to the upper end of the
line that represents the cavity side
near the adjacent wall. Make sure that
the level bar is parallel with the base
line. Draw a line. This line will now
represent the upper side of the cavity.

11. Place level bar in the end of the base
line (vertically). Make sure that the
level bar is parallel with the line
representing the side near the
adjacent wall. Draw a vertical line.
This line will represent the other side
of the cavity.

12. Recheck the layout by measuring the
length of the lines. Make adjustment if
necessary.

Assessment Method:
Demonstration, Evaluate Using Performance criteria checklist

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