KIRLOSKAR KAC - Refrigerant Properties; Charging the Refrigerant

KIRLOSKAR CHILLERS PRIVATE LIMITED
A Kirloskar Group Company IOM-KAC-ENG - Page 35
2. The required moisture level in the circuit after vacuum dehydration must be <100ppm for
systems
4.2.5. Refrigerant Properties
R-410A is highly efficient nearly azeotropic mixture (gases evaporate at nearly the same
temperatures) of two gasses ideally suited for replacing R-22 in scroll compressor packages. R-
410A will not damage the ozone and has a significantly higher vapor pressure than R-22.These
refrigerants are practically odorless. Refrigerants are non-combustible at atmospheric pressure.
Read the ‘Material Safety Data Sheet (MSDS) and the latest ASHRAE Safety Guide for
Mechanical Refrigeration’ to know more about safe handling of these refrigerants.
Refrigerant
R410A
Compressor type
11 TR
22 TR
Working pressure range high side
[bar(g)]
15.8 – 44.5
13.5 – 44.7
Working pressure range low side
[bar(g)]
1.9 – 10.8
1.7 – 11.6
Maximum high pressure safety switch setting
[bar(g)]
45
46.1
Minimum low pressure safety switch setting
[bar(g)]
0.5
1.5
Minimum low pressure pump-down switch
setting
[bar(g)]
2.3
1.7
4.2.5.1. Charging the Refrigerant
If it becomes necessary to charge the refrigerant at site, follow the procedure given below:
a) Connect the refrigerant cylinder with a connecting pipe to the charging valve provided in the
liquid line.
b) Open the valves and allow the refrigerant to flow into the refrigeration system. Refrigerant
will get charged till the pressures are equalized.
NOTE: RELEASE THE AIR AVAILABLE INSIDE THE TUBE
BEFORE MAKING THE FIRM CONNECTION TO THE
CHARGING VALVE.