Airedale DeltaChill FreeCool 110kW - 1080kW - Manual (Page 151)

Chillers DELTACHILL
™
Chillers
151
Installation, Commissioning and Maintenance Manual :7025232 12/ 2013
Commissioning Procedure
Waterside
General water
pipework Ensure that the system water pipework is clean from debris. If a flush and bypass circuit
is included ensure that the system is flushed prior to water entering the unit.
Water filter fitted Ensure that the water filter is fitted and clean.
Water flow rate Check that the design water flow rate is available to the unit. If not available do not turn
unit on.
Waterside pressure
drop Measure the waterside pressure drop of the unit ensuring that the pump (if fitted) is
operating.
Glycol strength Check and record the glycol type and strength. Low levels of glycol can cause freeze up
problems when operating at low temperatures or during the unit off state during cold
ambient conditions.
Glycol concentration is measured by use of a Refractometer.
Differential pressure
sensor Ensure that the differential pressure sensor operates satisfactory; the best way to do this
is to reduce the flow to the Chiller.

From pressure curves determine the design flow rate / pressure drop

Make sure that any effects of glycol in the system are taken into account
(Flowrate and pressure drop).

Input into the controller the reduced pressure drop (kPa) value (Normally 80% of
design flow rate)
Once this value is programmed into the controller the water flowrate can be reduced to
verify that the low flow alarm is activated.
Ensure that the tubes connected to the sensor are insulated.
Pump interlock Check that the pump interlock is fitted and functioning correctly.
Controls
Controller Record on the commissioning sheet the controller serial numbers details.

Controller type

Address

Serial number

Bios

Boot

Strategy reference
Controller settings The following controller settings are to be recorded on the commissioning sheet.

Head pressure differential (bar)

Minimum suction pressure (bar)

Supply water set point (Summer/ Day) (°C)

Supply water set point (Winter/ Night) (°C)

Minimum supply water temperature (°C)