035-19569-101 (0109)
5-1
GB
5 COMMISSIONING
5.1 Preparation
CAUTION
Commissioning of this unit should only be
carried out by York authorised personnel.
The Graphic Control Centre manual must be read in
conjunction with this section.
Preparation - Power Off
The following checks should be made with the customer
supply/supplies to the unit switched off.
Inspection: Inspect unit for installation damage. If found
take action and/or repair as appropriate.
Refrigerant charge: Units are normally shipped as
standard with a full refrigerant operating charge. Check
that refrigerant is present and that no leaks are apparent.
If no refrigerant is present a leak test must be undertaken,
the leak(s) located and repaired. Repaired systems and
units supplied with a nitrogen holding charge must be
evacuated with a suitable vacuum pump/recovery unit
as appropriate (refer to Section 7 for details).
Oil System: Check the oil system is correctly charged
and the oil level is between the upper and lower sight
glasses on the oil reservoir.
Isolation/protection: Verify that all sources of electrical
supply to the unit are taken from a single point of
isolation.
Control panel: Check panel to see that it is free of
foreign materials (wire, metal chips, etc.) and clean out
if required.
Power connections: Check the customer power cables
are connected correctly.
Earthing: Verify that the units protective terminal(s) are
properly connected to a suitable earthing point. Ensure
that all unit internal earth connections are tight.
Supply voltage: Verify that the site voltage supply
corresponds to the unit requirement and is within the
limits given on the unit data plate.
The customers disconnection devices can now be set
to ON.
WARNING
The machine is now live!
Oil Heater: Verify the oil heater is energised for at least
12 hours prior to start-up.
Water/Glycol system(s): Verify that the cooling and
chilled water systems have been installed correctly,
and has been commissioned with the correct direction
of water fl ow through the condenser and evaporator.
Purge air from the top of the condenser and evaporator
using the plugged air vents.
Flow switch(es): Verify a chilled water fl ow switch
is correctly fi tted in the customer’s pipework on the
evaporator outlet, and wired into the control panel.
Temperature sensor(s): Ensure the temperature
sensors are coated with heat conductive compound
(Part No. 013-00890-000) and inserted into the sensor
pockets.
Programmed options: Verify that the options factory
programmed into the control centre are in accordance
with the customers order requirements. Refer to the
Graphic Control Centre Operating Instructions for
details.
Programmed settings: Ensure the system setpoints,
cut-outs and operational settings are in accordance
with the instructions given in the Graphic Control Centre
Operating Instructions.
Date & time: Programme the date and time (see Graphic
Control Centre Operating Instructions).
Start/Stop schedule: Programme the daily and holiday
start/stop (see Graphic Control Centre Operating
Instructions).
To Next Page
Loading...
