Daikin WSC, Инструкция по установке, эксплуатации и обслуживанию

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Installation
www.DaikinApplied.com 23 IOM 1274-3 • CENTRIFUGAL WATER CHILLERS
Long Term Storage
This information applies to new units being stored waiting for
startup or to existing units that may be inoperative for a long
period.
The chiller must be stored indoors and protected from any
damage or corrosion. A Daikin Applied service representative
must perform an inspection and leak test of unit on minimum
quarterly schedule, to be paid by the owner or contractor.
Daikin Applied will not be responsible for any refrigerant
loss during the storage time or repairs to unit during period
of storage, or while moving the unit from original location to
storage facility and back to new installation location. Refer to
“Table 1: Equipment Room Guidelines” on page 8.
The following tasks must be performed:
1. As discussed above, the first and foremost task is to
leak test the unit when it is in its final resting place. If
any leaks exist, repair them immediately. After the unit is
stored, perform a periodic leak test.
2. It is possible that the unit could be bumped, hit or
otherwise damaged while in storage; so in addition to
leak testing, a visual overall inspection should be done.
3. If there is concern about the possibilities of damage
and loss of charge during storage, the customer can
pay to have the charge removed and stored in recovery
cylinders. If this is done, pressurize it to about 20 psi with
nitrogen. Monitor and maintain the pressure. Install a
pressure gauge that can easily be read or tie in a remote
alarm that can be monitored if pressure reduces. This
is desirable if the unit is stored with refrigerant or with a
nitrogen holding charge.
4. If the unit has been shipped and not yet installed, keep it
pumped down (as shipped from the factory) and close all
refrigerant valves.Keep oil sump valves closed to avoid
refrigerant migration to the oil sump. Over a long term,
the refrigerant will migrate to the oil tank and displace
the oil. The oil will spill over in to the evaporator through
the vent line and when the unit is powered up and the
heaters turned on, the refrigerant will boil out and the
sump will be empty.
5. Clean and dry the unit and look for any chipped paint.
Touch up as required to prevent rust.
6. If the storage area is subject to a high humidity, consider
a shrink wrap or water resistant covering of some sort.
Desiccants must be placed inside electrical panels and
starters (mounted or shipped loose) and be renewed as
recommended by manufacturer.
7. The Human Machine Interface (HMI), which is shipped
loose, should be secured in a dry area.
8. Regardless of the temperature of the storage area,
make sure all vessel tubes are drained and blown dry to
prevent the minerals in the standing water, plus oxygen
present, causing tube pitting. This includes the oil cooler
and water piping.
9. Restart by Daikin Applied service technicians will be
required and paid to Daikin Applied by the owner or
contractor. It is prudent to take photos when the unit
is stored to show that the conditions of storage have
been met. Also document all inspection reports and
abnormal conditions found. If the unit has been in
operation, the run-time hours and number of starts must
be documented prior to storage, along with the date the
unit was taken out of operation. The extended warranty
coverage can be suspended during the storage period-
not to exceed 30 months. The remaining warranty time
will restart once unit is reinstalled and officially re-
commissioned by Daikin Applied.
CAUTION
If the temperature of where the chiller is located is expected to
exceed 113°F (45°C), then the refrigerant must be removed.
For additional tasks required, contact Daikin Applied service.