Airedale TurboChill TTC1 [21/28] Chillers turbochill
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Airedale TurboChill TTC1 [21/28] Chillers turbochill

Airedale TurboChill TTC1 [21/28] Chillers turbochill
Chillers TURBOCHILL
Chillers
Installation Manual : 6703052 05/2008
21
Installation Data
WATER SYSTEM
When installing circulating water pumps or equipment containing them, the following rules
should be applied:
• Ensure the system is filled with liquid then vented and the pump primed with water
before running the pump, this is required because the pumped liquid cools the pump
bearings and mechanical seal faces
Pump Statement
• To avoid cavitation the NPSH (Net Positive Suction Head) incorporating a safety
margin of 0.5m head must be available at the pump inlet during operation
Interlocks & Protection
Always electrically interlock the operation of the chiller with the pump controls and flow
proving device for safety reasons.
CAUTION
Failure to install safety devices will invalidate the chiller warranty.
Do not rely solely on the BMS to protect the chiller against low flow conditions.
CAUTION
An evaporator pump interlock and flow proving device MUST be directly wired to
the chiller, to
Interconnecting Wiring, on page 25.
Maximum System
Operating Pressure
The system can safely be operating at a maximum of 10bar.
When all the pipework has been connected in the system, proceed as follows:
• Ensure all shut off and control valves are fully open
• Pressurise system to the operating pressure, hold for 1 hour (a gradual fall in
pressure shown on the gauge indicates a leak)
• Leaks should be found and repaired and the unit pressure tested for a further hour
Pressure Testing
When the pressure remains at the operating pressure for 1 hour, the system can be
considered leak free.
CAUTION
Although a pressure of 1.5 x working pressure is adequate for testing purposes,
most local water authorities require 2 x working pressure.
RECORD
Record on commissioning sheet provided once completed.
Filling
The whole system MUST be flushed prior to filling to remove debris left in the water
pipework by using a flushing bypass as shown to avoid serious damage to the
plate evaporator.
• During filling the system should be vented at all high points
• Once the system has been completely vented all vents should be closed
• To prevent air locking in the system it is advisable to fill the systems from the lowest
point, ie drain point on pipework
CAUTION
• If auto air vents are used then we strongly recommend an auto pressurisation unit be
fitted to the system

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