INSTALLATION
MAGNITUDE WME-D MAGNETIC BEARING CHILLER
DAIKIN APPLIED
14
Water Piping
All evaporators and condensers have OGS-type grooved water
connections (adhering to Standard AWWA C606) or optional
flange connections. The installing contractor must provide
matching mechanical connections. Be sure that water inlet and
outlet connections match certified drawings and nozzle markings.
PVC/CPVC piping should not be used.
WARNING
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.
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.
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
to prevent freeze up. Flow switches, thermal dispersion
switches, or Delta P switches can be used. Note that 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
•
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.
Recommended field installed chiller water piping includes:
•
thermometers at the inlet and outlet connections of both
vessels.
•
water pressure gauge connection taps and gauges at the
inlet and outlet connections of both vessels for measuring
water pressure drop.
NOTICE
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.
Vessel Drains at Startup
The unit is drained of water at the factory. Units are shipped with
the drain plug in the top water box drain hole and no plug in the
bottom drain hole. Drain plugs for each vessel head are shipped
separately in the control box. Be sure to install the bottom drain
plugs prior to filling the vessel with fluid.
Figure 13: Drain Plug Installation
No .
Description
1
Plug
2
Drain Hole (Under Insulation)
3
Vent Hole (Air Purge)