Airedale SmartCool 11-233kW - Manual (Page 23)

Precision Air Conditioning SmartCool
TM
– D
Precision Air Conditioning
23
Installation, Maintenance and Commissioning Manual :6877419 02/2013
Installation Data
System Pressure
Strength Test The system must be pressure tested to ensure that the pipework is installed satisfactory.
Nitrogen (Oxygen free) should only be used.
Strength Pressure Test is the pressure applied to a refrigeration system for its integral
strength and it is usually defined as maximum working pressure (MWP) x factor of 1.43.
The pressure test ideally should be carried out for a period of one hour.
IMPORTANT Low pressure transducers and switches must be removed whilst the high pressure
strength test is carried out.
CAUTION Before carrying out the pressure test, precautions shall be taken to evacuate all
personnel from the area of risk and post notices advising that the system or
equipment is under pressure.
The test pressure in the system should be held for at least one hour. A longer period may
be appropriate for larger systems or a fall in pressure due to leaks may not be detected.
Any fall in pressure indicates a leak which should be traced.
System Leak Test The system leak test is carried out with the low pressure transducers and switches fitted.
Leak Pressure Test is the pressure applied to a refrigeration system or part of a system to
test for leakage. This test pressure is defined as Maximum Working Pressure of the
particular system x factor of 1.1.
RECORD Record on commissioning sheet provided once completed.
IMPORTANT It is important that solenoid valves are energised correctly to ensure that the Hot Gas
Reheat coil is fully pressure tested (the normally closed (NC) valve should be energised).
The use of a magnetic coil lifter is recommended.
Filter Drier The filter drier must be installed as close to the expansion valve as possible. It should be
the last component within the system to be installed.
IMPORTANT Failure to correctly fit a filter drier can cause malfunction of the system. They are
however no substitute to good refrigeration practices with regard to system
cleanliness.
In
s
ta
ll
a
tion