Page 17 - R&ACT 1st Year - TT- TELUGU

73. Identify drier and capillary Expansion Valve
tube used in different cooling
machines. (09 hrs.) Expansion valve used in
domestic refrigeration and air
74. Replace drier and capillary conditioning s y s t e m s .
tube at the time of gas charging Capillaries, Automatic and
according to manufacturer’s Thermostatic Ex. Valves, and
direction. (10 hrs.) electronic expansion valves.(10
hrs..)

Professional Perform servicing of 75. Identify and service different Evaporator
Skill 16 Hrs.; different evaporator types of evaporators like Working principle, Function,
used in different plate and tube type, Fin
Professional andtube type, etc. fitted types of evaporators used
Knowledge appliances. in refrigerators, Bottle coolers, in refrigerator, water coolers,
05 Hrs. water cooler, Window and split bottle coolers, window and

AC. (08 hrs.) split A.C, Super heating
in evaporators, Function
76. Perform leak test, flush to of accumulator and types.
remove oil by dry nitrogen in Methods of defrosting.
evaporator. (08 hrs.) (05 hrs..)
Professional Carry out Recovery 77. Identify and explain different Refrigerant
Skill 30 Hrs.; and Recycling of colour code of different type Classification of refrigerants,
Refrigerant used, refrigerant cylinder like HCFCs
Professional nomenclature of refrigerants
Knowledge alternative of CFC, (HCFC-22, HCFC-123). including chemical name
06 Hrs. HFC re-cover, HFCs (HFC-134a, HFC-32, and formulas, hydro chloro
transfer & handing R- 410A, R-407C and R-404A) fluorocarbons (HCFCs), hydro
of gas cylinders. and low-Global Warming fluorocarbons (HFCs) and
Potential (GWP) refrigerants hydro fluoroolefins (HFOs),
like ammonia, R-290, HFC- blends of HFCs and blends of
32, blends of HFCs (R-410A, HFCs/HFOs. Climatic impact
R-404A, R-407C etc.) and of refrigerants: Stratospheric
hydro Fluor olefins (HFOs: ozone depletion, global warming,
HFO-1234yf, HFO-1234ze, mechanism of ozone depletion;
HFO-1233zd, HFO-1336mz), the Montreal Protocol phase-out
blends of HFCs and HFOs. (10 schedule of ozone depleting
hrs.) refrigerants (HCFCs) and high
78. Recover refrigerant from a global warming refrigerants
faulty machine. (07 hrs.) (HFCs). Brief introduction of
Ozone Depleting Substances
79. Transfer refrigerant from one (Regulation and Control) Rules,
cylinder to another using ice. 2000 and its amendments.
(04 hrs.)
Introduction of properties of
80. Measure pressure refrigerants; environment related
andtemperature of refrigerants properties: Ozone Depleting
including HCFC-22, ammonia, Potential (ODP), GWP; ODP
R-290, HFC-32, HFC-134a, and GWP of various
R-404A, R-407Cand R-410A, refrigerants, thermo chemical
HFOs. Identify flammability properties: flammability and
and toxicity of A3 and A2L of toxicity of refrigerants, lower
refrigerants. (09 hrs.) flammability limit (LFL) and
upper flammability limit of A3
and A2L refrigerants. Thermo
physical properties: pressure
temperature of different
refrigerants.(06 hrs..)

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