Skill name
Refrigeration and Air Conditioning
Criteria
Mark
Mark
A
Component Fabrication
12.00
12.000
B
Component & System Installation
20.00
20.000
C
Electrical Installation
12.00
12.000
D
Commissioning & Adjustment
24.00
24.000
E
Mechanical Fault Finding & Repair
10.00
10.000
F
Refrigerant Recovery & Emission control
13.00
13.000
G
Work practices and Safety
9.00
9.000
Total
100.00
100.000
Sub
Criteria
ID
WSSS
Section
Sub - Criteria
Name or Description
Aspect
No
Aspect
Type
O = Obj
S = Sub
Aspect - Description
For Objective Assessment Only
Max
Mark
0
Add - (Extra Aspect Information)
A1 Module A: Copper Fabrication 1 O Fabricated headers has inlet and outlets pipes arrangesd as per specifications at 90 degress to headers 1st side 0 - 1 degree
0.40
1 - 3 degree 0.20
>3 degree 0.00
2nd side 0 - 1 degree 0.40
1 - 3 degree 0.20
>3 degree 0.00
2 O Fabricated headders are squared and lies flat on the tables A1 0 - 1 mm 0.80
1 - 3 mm 0.40
>3 mm r 0.00
3 O Fabricated headders arranges as per specifications at 90 degrees to 1/2" soft drawn copper tubes 0 - 1 degree 0.80
1 - 3 degree 0.40
>3 degree 0.00
4 O Overall width D1 is as per specifications 1st Side 0 - 1 mm refer drawing 0.40
1 - 3 mm refer drawing 0.20
>3 mm refer drawing 0.00
2nd Side 0 - 1 mm refer drawing 0.40
1 - 3 mm refer drawing 0.20
>3 mm refer drawing 0.00
5 O Overall width D2 is as per specifications 1st Side 0 - 1 mm refer drawing 0.40
1 - 3 mm refer drawing 0.20
>3 mm refer drawing 0.00
2nd Side 0 - 1 mm refer drawing 0.40
1 - 3 mm refer drawing 0.20
>3 mm refer drawing 0.00
6 O Overall width D3 is as per specifications 1st Side 0 - 1 mm refer drawing 0.40
1 - 3 mm refer drawing 0.20
>3 mm refer drawing 0.00
2nd Side 0 - 1 mm refer drawing 0.40
1 - 3 mm refer drawing 0.20
7 O Overall width D4 is as per specifications 1st Side 0 - 1 mm refer drawing 0.40
1 - 3 mm refer drawing 0.20
>3 mm refer drawing 0.00
2nd Side 0 - 1 mm refer drawing 0.40
1 - 3 mm refer drawing 0.20
>3 mm refer drawing 0.00
8 O Overall width D5 is as per specifications 1st Side 0 - 1 mm refer drawing 0.20
1 - 3 mm refer drawing 0.10
>3 mm refer drawing 0.00
2nd Side 0 - 1 mm refer drawing 0.20
1 - 3 mm refer drawing 0.10
>3 mm refer drawing 0.00
3rd Side 0 - 1 mm refer drawing 0.20
1 - 3 mm refer drawing 0.10
>3 mm refer drawing 0.00
4st Side 0 - 1 mm refer drawing 0.20
1 - 3 mm refer drawing 0.10
>3 mm refer drawing 0.00
9 O Fabricated copper tube is leak tight on first attemp Pressure tested to 10 bars +/- 1.50
10 O Brazed joint B1 is made to acceptable standard Yes/No 2% solder used 0.40
11 O Brazed joint B2 is made to acceptable standard Yes/No 2% solder used 0.40
12 O Brazed joint B3 is made to acceptable standard Yes/No 2% solder used 0.40
13 O Brazed joint B4 is made to acceptable standard Yes/No 2% solder used 0.40
14 O Brazed joint B5 is made to acceptable standard Yes/No 2% solder used 0.40
15 O Nitrogen was used while brazing a pipework 0.50
16 O The competitor prevented moisture contamination inside the pipe during the assembly process. Yes LIVE MARKING 0.50
17 O The bare coil is fabricated according to the drawing and specification. Yes 0.70
18 O No extra material used due to mistake during the process Yes LIVE MARKING 0.40
Sub
Criteria
ID
WSSSS
section
Sub - Criteria
Name or Description
Aspect no
Aspect
Type
O = Obj
S = Sub
Aspect - Description
For Objective Assessment Only
Max
Mark
Requirement
or Nominal
Size
Add - (Extra Aspect Information)
B1 Module B - Major Components 19 O Electrical switchboard installed in specified location and securely fixed to wall 0.4
20 O Condensing unit installed in specified location and securely fixed to cradle 0.4
21 O Tube in tube heat exchanger installed in specified location and securely fixed to wall 0.4
22 O Glycol tank is installed as speciffied 0.4
23 O Fabricated copper coil installed in ice ring as specified 0.2
24 O All pipework is installed within boundaries of supplied cradle 0.4
B2 Module B - Refrigerant Controls 25 O TXV installed in correct location in system, with correct flow and as per manufacturer instruction. 0.50
26 O Sigh glass & filter dryer installed in correct location in system with correct flow direction Yes 0.50
27 O Dual pressure control pipes installed as per specification Yes 0.50
28 O Pressure control is leveled and securely mounted to wall Yes 0.30
B3 Module B - Low Presure Vapor Lines 29 O All pipe installed in vertical and horizontal planes and the pipe work is vertically and horizontally straight. Yes 0.30
30 O All bends of appropriate radius with no kinks Yes 0.10
31 O Suction line is securely fastened using appropriate method Yes 0.30
32 O Installed pipe work does not rub on any components when operating (fan blades, penetration, etc) Yes 0.20
33 O Nitrogen was used while brazing a pipework LIVE MARKING 0.20
34 O Brazed joint 1 is made to acceptable standard 0.40
35 O Suction, low pressure liquid and low pressure lines are set out so that these pipes don't cross each other. 0.20
36 O All Suction line is neatly insulated the entire length of the installation Yes 0.20
37 0 Single gauge installed as specified and standard 0.20
B4 Module B - High Pressure Liquid Line 38 O All pipe installed in vertical and horizontal planes and the pipe work is vertically and horizontally straight. Yes 0.30
39 O All bends of appropriate radius with no kinks 0.10
40 O Liquid line is securely fastened using appropriate method 0.30
41 O Installed pipe work does not rub on any components when operating (fan blades, penetration, etc) Yes 0.20
42 O Nitrogen was used while brazing a pipework LIVE MARKING 0.20
43 O Brazed joint 2 is made to acceptable standard 0.40
44 0 Single gauge installed as specified and standard 0.20
B6 Module B - High Pressure Discharge Line 45 O All pipe installed in vertical and horizontal planes and the pipe work is vertically and horizontally straight. Yes 0.30
46 O All bends of appropriate radius with no kinks 0.10
47 O High Pressure line is securely fastened using appropriate method 0.30
48 O Installed pipe work does not rub on any components when operating (fan blades, penetration, etc) Yes 0.20
49 O Nitrogen was used while brazing a pipework LIVE MARKING 0.20
50 O Brazed joint 3 is made to acceptable standard 0.40
B6 Module B - Tube in Tube Heat Exchanger 52 O Heat Exchanger is piped as per diagram 0.50
53 O Brazed joint 4 on refrigerant side of heat exchanger is acceptable 0.40
54 O Glycol pipework installed as per diagram 0.40
55 O All glycol pipework lines are insulated 0.20
56 O Glycol pipework has no kinks on copper and plastic tubing 0.10
57 O All pipe work does not rub on any components when operating (fan blades, penetration, etc) 0.10
58 O All pipe installed in vertical and horizontal planes. 0.20
59 O Glycol line is securely fastened using appropriate method 0.10
60 O Brazed joint 5 on glycol side heat exchanger is acceptable 0.40
B7 Module B - Pressure Test 61 O Starting presure of all attempts meet required standards 0.50
62 O The appropriate valves were opened to ensure pressure testing of entire system 0.40
63 O Gauge were correctly fitted to the system 0.20
64 O Nitrogen was safely added to the system to the desired test pressure 0.40
65 O System was leak tested while under pressure 0.20
66 O No leaks were detected on FIRST pressure attempt 2.00
67 O System held pressure for complete standing time after any leaks repaired 0.50
68 O Nitrogen was released from system at completion of pressure test. 0.20
69 O The service manifold gauge lines were removed with minimal refrigerant loss Yes 0.30
B8 Module B - Evacuation 70 O Vacuum level (value) of all atempts meet required standards 0.50
71 O The appropriate valve were opened to ensure evacuation of the entire system Yes/No 0.20
72 O Vacuum gauge installed so it can be isolated from vacuum pump and still measure system Yes/No 0.20
73 O The vacuum held when isolated from the vacuum pump for 10 minutes after FIRST attempt 2.00
74 O The vacuum held when isolated from the vacuum pump for 10 minutes after FINAL attempt Yes/No 0.50
20.00
Sub
Criteria
ID
WSSS
section
Sub - Criteria
Name or Description
Aspect
No
Aspect
Type
O = Obj
S = Sub
Aspect - Description
For Objective Assessment Only
Max
Mark
Requirement
or Nominal
Size
Add - (Extra Aspect Information)
C1 Module B - Connect the Electrical Circuit 75 O All wiring installed as per supplied drawing Yes/No 0.50
76 O Supply voltage is wired correctly on supplied plug Yes/No 0.50
77 O 220V supply wired to correct terminals in switchboard, and correctly terminated Yes/No 0.50
78 O Condensing unit wired to correct terminal in switchboard, and correctly terminated Yes/No 0.50
79 O Pressure control wired to correct terminal in switchboard, and correctly terminated Yes/No 0.50
80 O Glycol pump wired to correct terminal in switchboard, and correctly terminated Yes/No 0.50
81 O All cables saddled (fixed) and secured separate to piping Yes/No 0.80
82 O Installed cables not to be crush by piping or other components Yes/No 0.50
83 O Installed cables and wires installed as per test project for adequate protection Yes/No 0.50
C2 Module B - Connect the Electronic Controls 85 O Temperature probe is wired to the correct terminals in switchboard, and terminated correctly 0.50
86 O Temperature probe is installed in conduit/cable trunking correctly Yes/No 0.30
87 O Conduit/cable trunking is verticaly and horizontaly leveled and securely fastened Yes/No 0.30
88 O Before turning the power on: the Earth circuit was correctly tested for continuity Yes/No 0.50
89 O Before turning the power on: the Neutral circuit was correctly tested for continuity Yes/No 0.50
C3 Module B - Electrical Testing 90 O Installation tested for earth continuity to power supply 0.50
91 O Installation tested for earth continuity to condensing unit proir to energising Yes/No 0.50
92 O Installation tested for earth leakage proir energising Yes/No 0.50
93 O Installation tested for short between active and neutral prior energising Yes/No 0.50
94 O No wiring fault found on circuit testing Yes/No 0.50
95 O Circuit energised safely the first time without blowing fuses/circuit breaker/etc Yes/No 1.00
96 O circuit operated safely and correctly the first time without wiring modifications Yes/No 0.50
97 O Circuit operated safely and correctly after any necessary modifications Yes/No 0.50
12.00
Sub
Criteria
ID
WSSS
section
Sub - Criteria
Name or Description
Aspect
No
Aspect
Type
O = Obj
S = Sub
Aspect - Description
For Objective Assessment Only
Max
Mark
Requirement
or Nominal
Size
Add - (Extra Aspect Information)
D1 Module B - Charge with Refrigerant Primary Circuit 98 O The correct valves were opened prior to operation 0.40
99 O Liquid refrigeration was added to the liquid line only (not suction) no leakage 1.00
100 O The correct refrigerant charge weighed into the system and recorded, using an acceptable method 1.00
101 O Amount of refrigerant added is within acceptable guidelines Yes 0.80
102 O Electronic leak check was made during charging of refrigerant Yes 1.00
103 O The gauge were removed from the system with no avoidable loss of refrigerant 0.80
D2 Module B - Charge with Refrigerant Secondary Circuit 104 O Water added to the system was measured to ensure 60% water by volume and a 40% glycol by volume 1.00
105 O Glycol pump circulated prior to any refrigeration being energised 0.50
D3 Module B - Commissioning report 106 O Commissioning report - Ambient temperature is recorded correctly 0.40
107 O Commissioning report - Refrigerant type is recorded correctly Yes 0.40
108 O Commissioning report - Mass of refrigerant is recorded correctly Yes 0.40
109 O Commissioning report - Suction pressure is recorded correctly Yes 0.40
110 O Commissioning report - Discharge pressure is recorded correctly Yes 0.40
111 O Commissioning report - Condenser subcooling measured and recorded correctly Yes 0.40
112 O Commissioning report - Total system superheat measured and recorded correctly Yes 0.40
113 O Commissioning report - LP control cut in set and cut out are set and recorded correctly Yes 0.60
114 O Commissioning report - HP cut out is set and recorded correctly Yes 0.60
115 O Commissioning report - Capacity regulator is set and recorded correctly Yes 0.50
116 O Commissioning report - Glycol supply and return temperature to and from ice rink recorded correctly 0.40
D4 Module B - Commissioning; Complete Installation 119 O Project completed requiring no additional materilas 0.30
120 O Covers installed securely on all equipment Yes 0.30
121 O Correct refrigerant type was recorded Yes 0.30
122 O No burn marks and no damage on any equipment from installation 0.70
123 O System left operation at completion of module 0.50
124 O After minimum 12hrs run time there is NO water present above the fabricated copper tubing submerged in the ice ring 1.00
125 O The control was correctly programmed as per test project specifications 0.50
D5 Module C - Commissioning Report 126 O Commissioning Report - Ambient temperature measured and recorded correctly. 0.30
127 O Commissioning Report - return air temperature dry bulb/wet bulb measured, recorded and plotted correctly Yes/No 1.00
128 O Commissioning Report - supply air temperature dry bulb/wet bulb measured, recorded and plotted correctly Yes/No 1.00
129 O Commissioning Report - Indoor fan speed and mode of operation selected and recorded correctly Yes/No 0.30
130 O Commissioning report - Refrigerant type is recorded correctly Yes/No 0.40
131 O Commissioning report - Suction pressure is recorded correctly Yes/No 0.50
132 O Commissioning report - Total system superheat measured and recorded correctly Yes/No 0.50
133 O Commissioning report - Condensing unit operating current measured and recorded correctly Yes/No 0.50
134 O Commissioning report - Indoor fan operating current measured and recorded correctly Yes/No 0.50
135 O Supply and return air conditions were joined to indicate cooling process Yes/No 0.50
O
D6 Module C - Commissioning - Complete Installation 136 O Project completed requiring no additional materilas Yes/No 0.50
137 O Covers installed securely on all equipment Yes/No 0.50
138 O No burn marks and no damage on any equipment from installation Yes/No 0.70
139 O Installation not damaged in any ways Yes/No 0.50
140 O System left in correct operation Yes/No 0.50
24.00
Sub
Criteria
ID
WSSS
section
Sub - Criteria
Name or Description
Aspect
No
Aspect
Type
O = Obj
S = Sub
Aspect - Description
For Objective Assessment Only
Max
Mark
Requirement
or Nominal
Size
Add - (Extra Aspect Information)
E1 ModuleC - Mechanical Fault Finding 141 O The unit was tested for short circuit, insulation resistance and earth continuity prior to energising 1.00
142 O The fault was correctly identified, repaired, recorded and reclaim started in under 30 minutes 3.00
143 O The fault was correctly identified, repaired, recorded and reclaim started in under 60 minutes 2.50
144 O The fault was correctly identified, repaired, recorded and reclaim started in under 90 minutes 2.00
145 O The fault was correctly identified, repaired, recorded and reclaim started in under 120 minutes 1.50
Sub
Criteria
ID
WSSS
section
Sub - Criteria
Name or Description
Asepct
No
Aspect
Type
O = Obj
S = Sub
Aspect - Description
For Objective Assessment Only
Max
Mark
Requirement
or Nominal
Size
Add - (Extra Aspect Information)
F1 Module C - Reclaim Refrigerant 146 O Power supply to air conditioner was isolated before refrigerant recovery started 0.60
147 O Service manifold gauge lines were fitted to the system in the correct way with minimal loss of refrigerant 0.50
148 O Moisture contamination was prevented without loss of refrigerant 0.50
149 O The correct refrigerant cylinder was selected for the recovery of refrigerant 0.40
150 O Refrigerant cylinder weighed and recorded before recovery started 1.00
151 O Refrigerant recovery lines set up was correct first time 1.00
152 O The full refrigerant charge was removed from the system using recovery machine 1.00
153 O Electronic leak check was made during recovery of refrigerant 1.00
154 O Syetem pressure were at atmospheric pressure or below after recovery was completed 1.00
155 O All service caps repalced on the recovery unit and recovery cylinder 0.50
156 O The quantity of refrigernat recovered from the system was recorded 0.50
F2 Module C - Evacuation 157 O First vacuum attemp meets required standards 1.00
158 O The vacuum held when isolated from vacuum pump for 10 minutes after any attempt 1.50
F3 Module C - Charge with Refrigerant 159 O The correct refrigerant charge weighed into the system and recorded, using an accetable method 1.00
160 O Amount of refrigerant added is within accetable guidelines 1.00
161 O The gauges were removed from the system with the minimals loss of refrigerant. 0.50
13.00
Sub
Criteria
ID
WSSS
section
Sub - Criteria
Name or Description
Aspect
No
Aspect
Type
O = Obj
S = Sub
Aspect - Description
For Objective Assessment Only
Max
Mark
Requirement
or Nominal
Size
Add - (Extra Aspect Information)
G1 Module A - Work Practices and safety 162 O Protective gloves were worn at all times when exposed to heat sources 0.50
163 O Protective eye wear was worn at all times while brazing 1.00
164 O The competitors always used the correct tools and safe work practices for every actvity 0.50
165 O The competitors brazing torches and regulators are left at atmospheric prssure on completion of modules 1.00
G2 Module B - Work Practices and safety 166 O Protective gloves were worn at all times when exposed to heat sources and cut hazards 0.50
167 O Protective eye wear was worn at all times while brazing, drilling, handling refrigerant, glycol and nitrogen 1.00
168 O The competitors always used the correct tools and safe work practices for every actvity 0.50
169 O The competitors brazing torches and regulators are left at atmospheric prssure on completion of modules 1.00
G3 Module C - Work Practices and safety 170 O Protective gloves were worn at all times when exposed to heat sources and cut hazards 0.50
171 O Protective eye wear was worn at all times while brazing, drilling, handling refrigerant and nitrogen 1.00
172 O The competitors always used the correct tools and safe work practices for every actvity 0.50
