Airedale TurboChill FreeCool 200kW - 1830kW - Manual (Page 127)

127 Chiller Technical Manual 7525355 V1.0.0_04_2013
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Chillers TurboChill™ Air Cooled and FreeCool
Maintenance
Refrigeration
Service Tools / Test Equipment
• Refrigerant Manifold Gauges
• Spanners
• Voltmeter
Safety Equipment
• Safety Glasses / Goggles
• Gloves
• Overalls
Procedures
HP / LP Safety Pressure Switch Settings
Check operation of HP/LP cut-out.
Settings
LP cut-out – (Auto reset for 3 times when the Low Pressure is detected over a period of 1 hour)
Has a 2 minute delay on start-up (similar to a Low ambient kit)
Low pressure cut-out 0.29 +/- 0.2 Barg
HP switch (Manual reset): High pressure switch 17.5 Barg +/- 0.7 Barg
HP limiting function 15.0 Barg / 1.5 Barg differential
Task Frequency
3 Mths 12 Mths 60 Mths
Refrigeration
Compare the following and compare results
with commissioning records:
Suction, liquid and discharge pressures.
●
Refrigeration system temperatures, suction, liquid and
discharge. Record superheat and sub cooling temperatures.
●
Check each circuit sight glass for dryness
and bubbles for indication of leaks.
●
Head pressure control is maintained. ●
Record details on F-Gas record. ●
Pressure relief valves. (replace in
accordance to building insurance)
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