Daikin EWAP/EWYP 060-260, Installation Operation & Maintenance

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28 CG-SVX04C-E4
Maintenance
Maintenance Instructions
The following maintenance
instructions are part of maintenance
operations required for this
equipment. A qualified technician is
needed for regular maintenance as
part of a regular maintenance contract.
Carry out all operations as required
by schedule. This will ensure long
unit service life and reduce the
possibility of serious and costly
breakdown.
Keep service records up to date,
showing monthly information on
unit operations. These records can
be of great help to maintenance
personnel diagnostics.
Similarly, if machine operator keeps
a log of changes in unit operating
conditions, problems can be
identified and solutions found before
more serious problems arise.
Inspection visit after the first 500
hours of operation from unit start up
- Carry out oil analysis
- Carry out leak test.
- Inspect contacts and tighten
terminals.
- Record operating pressures,
temperatures, amperages and
voltage.
- Check operation of
machines/compare conditions of
operation against original
commissioning data.
- Fill out inspection visit log sheet
and review with the operator
- Check and clean the strainer
Monthly preventive visit
- Carry out leak test.
- Oil test of acidity
- Check Ethylene glycol % in the
chilled water circuit if glycol
presence is required
- Inspect contacts and tighten
terminals.
- Record operating pressures,
temperatures, amperages and
voltage.
- Check operation of
machines/compare conditions of
operation against original
commissioning data.
- Fill out visit log sheet and review
with the operator.
- Check and clean the strainer.
Annual preventive visit
- Check water flows and interlocks.
- Check expansion tank pressure.
- Check glycol % in the chilled water
circuit if glycol presence is
required
- Check operational set points and
performance.
- Calibrate controls and pressure
transducer.
- Check operation of all safety
devices.
- Inspect contacts and tighten
terminals.
- Megger the motor compressor
windings.
- Record operating pressures,
temperatures, amperages and
voltage.
- Carry out leak test.
- Check configuration of unit control
module.
- Carry out oil analysis
- Change the oil as required based
upon results of the oil analysis
- Check operation of
machines/compare conditions of
operation against original
commissioning data.
- Fill out the annual start up visit log
sheet and review with the operator.
- Check and clean the strainer.
Caution:
- Please refer to specific Daikin
documentation on oil, available
from your nearest Daikin office.
Oils recommended by Daikin have
been exhaustively tested in Daikin
laboratories to the specific
requirement of Daikin chiller and
hence the user's requirements.
Any use of oils not meeting
specifications recommended by
Daikin is the responsibility of the
user only, who thereby is liable to
warranty loss.
- Oil analysis and oil test acidity
must be carried out by a qualified
technician. Poor interpretation of
results may cause unit operating
problems. Also, oil analysis must
follow the correct procedures, to
avoid accidental injury to
maintenance personnel.
- If the condensers are dirty, clean
them with a soft brush and water.
If the coils are too dirty, consult a
cleaning professional. Never use
high pressure water to clean
condenser coils.
- Contact Daikin Service for
information on maintenance
contracts.
Warning:
- Switch off unit main power supply
before to any intervention. Failure
to follow this safety instruction can
lead to accident death of the
maintenance personnel and may
also destroy equipment.
- Never use steam or hot water
above 60°C to clean condenser
coils. The resulting increasing
pressure could cause refrigerant
lost through the safety valve.
Pump maintenance
Pumps motor bearings and
mechanical seals have a designed
life expectancy of 20000-25000 hours
of operation. For critical applications
it might be necessary to change the
components as a preventive
measure.