Maintenance; Routine Maintenance - Daikin WDC Installation, Operation And Maintenance Manual

Maintenance

NOTE: Installation and maintenance are to be performed
only by qualified personnel who are familiar with local
codes and regulations, and experienced with this type
of equipment.
DANGER
LOCKOUT/TAGOUT all forms of hazardous energy and power sources
prior to starting, pressurizing, de-pressuring, or powering down the chiller.
Failure to follow this warning exactly can result in serious injury or death.
Be sure to read and understand the installation, operation, and service
instructions within this manual.
CAUTION
Dyes used for refrigerant leak detection are not tested or recommended for
use in Daikin Applied chillers. Use of these products may damage and/or
degrade the performance of the equipment and will void the manufacturer
warranty.
DANGER
Prevent lint, paper fibers, dust, metallic chips, or other foreign material from
getting into the inverter or accumulating on VFD cooling inlets, the heat
sinks, circuit boards, control panels, or other electrical devices. Failure to
do so may affect operation of the VFD, void warranty, result in a fire, unit
damage, property damage, severe personal injury, or death. Frequently
inspect area around inverter, heatsink, and other electrical devices to
ensure they are free of foreign material.

Routine Maintenance

CAUTION
Improper servicing of the lubrication system, including the addition of
excessive or incorrect oil, substitute quality oil filter, or any mishandling
can damage the equipment. Only authorized and trained service personnel
should attempt this service. For qualified assistance, contact your local
Daikin Applied service location.
Lubrication
After the system is once placed into operation, no other
additional oil is required except in the event that repair work
becomes necessary to the oil pump, or unless a large amount
of oil is lost from the system due to a leak.
If oil must be added with the system under pressure, use a
hand pump with its discharge line connected to the backseat
port of the valve in the lubricant drain from the compressor to
the sump. The POE oils used with R-134a and R-513A are
hygroscopic and care must be exercised to avoid exposure to
moisture (air).
The condition of compressor oil can be an indication of the
general condition of the refrigerant circuit and compressor
wear. An annual oil check by a qualified laboratory is essential
for maintaining a high level of maintenance. It is useful to have
an oil analysis at initial startup to provide a benchmark from
which to compare future tests. The local service office can
recommend suitable facilities for performing these tests.
www.DaikinApplied.com
Analysis" on page 66
item in greater detail and
the upper limits for metals and moisture in the polyolester
lubricants required by Daikin Applied chillers.
POE type oil is used for compressor lubrication. This type of
oil is extremely hygroscopic, which means it will quickly absorb
moisture if exposed to air and may form acids that can be
harmful to the chiller. Avoid prolonged exposure of POE oil
to the atmosphere to prevent this problem. For more details
on acceptable oil types, contact your Daikin Applied service
representative.
This unit contains POE lubricants that must be handled carefully and the
proper protective equipment (gloves, eye protection, etc.) must be used
when handling POE lubricant. Failure to do so can result in personal injury.
POE must not come into contact with any surface or material that might
be harmed by POE, including certain polymers (e.g. PVC/CPVC and
polycarbonate piping).
Polyolester Oil, commonly known as POE oil is a synthetic oil used in
many refrigeration systems, and may be present in this Daikin Applied
product. POE oil, if ever in contact with PVC/ CPVC, will coat the inside
wall of PVC/CPVC pipe causing environmental stress fractures. Although
there is no PVC/ CPVC piping in this product, please keep this in mind
when selecting piping materials for your application, as system failure and
property damage could result.
It is important that only the manufacturer's recommended oils
be used. Acceptable POE oil types are:
• CPI/Lubrizol Emkarate RL32H
• Exxon/Mobil EAL Arctic 46
• Hatcol 3692
• Everest 46
Changing Oil Filters
Daikin Applied chillers are at positive pressure at all times
and do not leak contaminated moist air into the refrigerant
circuit, thereby eliminating the need for annual oil changes. An
annual laboratory oil check is recommended to check overall
compressor condition.
The oil filter can be changed by simply isolating the filter
cavities. Close the oil discharge line service valve at the oil
pump (at the filter on CE126). Remove the filter cover; some
foaming can occur but the check valve should limit leakage
from other compressor cavities. Remove the filter, replace
with new element, and replace filter cover using a new gasket.
Reopen the valve in the pump discharge line and purge air
from the oil filter cavity.
When machine is operated again, the oil level must be checked
to determine if oil needs to be added to maintain the proper
operating level.
"Oil
63 IOM 1281-2 • CENTRIFUGAL WATER CHILLERS
Maintenance
discusses this important maintenance
Table 29 on page 67 gives
WARNING
CAUTION