Daikin WSC, Инструкция по установке, эксплуатации и обслуживанию

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IOM 1274-3 • CENTRIFUGAL WATER CHILLERS 10 www.DaikinApplied.com
Installation
WARNING
Polyolester Oil, commonly known as POE oil is a synthetic
oil used in many refrigeration systems, and is 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. Refer to the pipe
manufacturer’s recommendations to determine suitable
applications of the pipe.
CAUTION
If welding is to be performed on the mechanical or flange
connections:
1. Remove the solid-state temperature sensor,
thermostat bulbs, and nozzle mounted flow
switches from the wells to prevent damage to those
components.
2. Properly ground the unit or severe damage to the
MicroTech
®
unit controller can occur.
NOTE: ASME certification will be revoked if welding is
performed on a vessel shell or tube sheet.
The water heads can be interchanged (end for end) so that
the water connections can be made at either end of the unit.
If this is done, use new head gaskets and relocate the control
sensors.
Field installed water piping to the chiller must include:
• air vents at the high points.
• a cleanable water strainer upstream of the evaporator
and condenser inlet connections.
• a flow proving device for both the evaporator and
condenser. Flow switches, thermal dispersion switches,
or Delta-P switches can be used. Note that thermal
dispersion flow switches are factory installed. Additional
flow switches can be used only if they are connected in
series with the ones already provided. Connect additional
flow switches in series between original flow switch
inputs. Calibration of thermal dispersion flow switches is
discussed on page 69 .
• water pressure gauge connection taps and gauges at the
inlet and outlet connections of both vessels for measuring
water pressure drop.
• sufficient shutoff valves to allow vessel isolation. The
chiller must be capable of draining the water from the
evaporator or condenser without draining the complete
system.
• Piping must be supported to eliminate weight and strain
on the fittings and connections.
• Chilled water piping must be adequately insulated.
It is recommended that field installed water piping include:
• thermometers at the inlet and outlet connections of both
vessels.
CAUTION
When common piping is used for both building heating and
cooling modes, care must be taken to provide that water
flowing through the evaporator cannot exceed 100°F. Water
this hot can damage controls or cause the relief valve to
discharge refrigerant.
NOTE:
This product, in its standard configuration, is
equipped with a shell and tube evaporator with
carbon steel shell and copper tubes. The water or
other fluid used in contact with the wetted surfaces of
the heat exchangers must be clean and non-corrosive
to the standard materials of construction. Daikin
Applied makes no warranty as to the compatibility
of fluids and materials. Non-compatible fluids may
void the equipment warranty. If the compatibility of
the fluid with the standard materials of construction
is in question, a professional corrosion consultant
should administer the proper testing and evaluate
compatibility.
Heat Recovery Condenser
Connections
The tower connections on heat
recovery units are always the
inboard pair of connections.
In the image to the left, the
condenser connections are
“left-hand” when viewed from
the front of the unit (Unit Control
Panel and Interface Panel side),
so in this case, the right-hand
condenser connections would be
for the tower. If the condenser
connections were on the other
end (“right-hand”), the tower
connections would be the left-
hand pair of connections.
Templifier Source Water Piping
Templifier evaporator water can come from various sources
and care must be used to avoid sources that can cause
corrosion, fouling, or accumulation of debris in the heat
exchanger. For open water loop applications, an intermediate
heat exchanger between the source water and unit evaporator
may be desirable.
Water Quality Guidelines
The water quality provided by the owner/occupant/operator/
user to a chiller system should minimize corrosion, scale
buildup, erosion, and biological growth for optimum efficiency
of HVAC equipment without creating a hazard to operating
personnel or the environment. Strainers must be used to
protect the chiller systems from water-borne debris. Daikin
Applied will not be responsible for any water-borne debris