Airedale DeltaChill FreeCool 110kW - 1080kW - Manual (Page 153)

Chillers DELTACHILL
™
Chillers
153
Installation, Commissioning and Maintenance Manual :7025232 12/ 2013
Compressor oil level
(Full load) Check the compressor oil level at full load. (record oil level)
Circuit 1 Circuit 2
HP/ LP Safety
Pressure Switch
Settings 
Check operating 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 – 0.5 +/- 0.2 Barg

HP switch – (manual reset): High pressure switch – 40.25 bar +/- 1 Barg

HP limiting function 40 barg / 2 barg differential (this reduces the number of
compressors operating i.e. 3 comp, 2 comp and down to 1 comp.
Low supply water trip To check operation of the low temperature trip the following procedure can be carried
out.
With the unit running increase the low temperature limit to the actual supply water
temperature.
This will trip the unit in a safe manner without risk of freezing the evaporator
Return the low temperature limit to correct value after test (this will allow the unit to
operate correctly).

EC Fan interrogation The EC fans can be interrogated by connecting a hardware interface kit to the fan and
PC. The kit comprises of a USB to RS232 9-
pin “D-type” adapter. This should be
installed on the PC with the software supplied with the kit. The “COM” port of the USB to
RS232 adapter should be assigned to a free COM port between COM 1 and COM 4 via
the system device manager.
Connect the RS232 to RS485 interface converter to the USB port of your PC via the
USB to RS232 serial interface lead and connect the RS485 output to the Fan.
Tx += RS A
Tx - = RS B
The switch on the RS232 to RS485 should be set to RS485.
Return completed commissioning sheets back to Airedale to validate warranty