Installation manual

6 Magnitude™ Frictionless Centrifugal Chillers – Model WMC IM 1029-2

size and type required. Victaulic connections are AWWA C-606 on 14-inch and larger sizes. Field supply

transitions if Victaulic brand AGS® (Advanced Groove System) type grooves are used on the field piping.

CAUTION

Freeze Notice: Neither the evaporator nor the condenser is self-draining;

both must be blown out to help avoid damage from freezing temperatures.

The piping should include thermometers at the inlet and outlet connections and air vents at the high points.

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.

In cases where the water pump noise can be objectionable, vibration isolation sections are recommended at

both the inlet and outlet of the pump. In most cases, it will not be necessary to provide vibration eliminator

sections in the condenser inlet and outlet water lines. But they can be required where noise and vibration are

critical.

Important Notes on Welding

If welding is to be performed on the mechanical or flange connections:

1. Remove the solid-state temperature sensor, thermostat bulbs and optional nozzle mounted flow switches (if

so equipped) from the wells to prevent damage to those components.

2. Properly ground the unit or severe damage to the MicroTech II® unit controller can occur.

Note: ASME certification will be revoked if welding is performed on a vessel shell or tube sheet.

Water pressure gauge connection taps and gauges must be provided in the field piping at the inlet and outlet

connections of both vessels for measuring the water pressure drop. The pressure drops and flow rates for the

various evaporators and condensers are job specific and the original job documentation can be consulted for

this information. Refer to the nameplate on the vessel shell for identification.

Connections

Be sure that water inlet and outlet connections match certified drawings and stenciled nozzle markings. The

condenser is connected with the coolest water entering at the bottom connection to maximize subcooling. The

evaporator outlet is on the right side of the head, regardless of which end the connections are on. Refer to

dimension drawings beginning on page 11.

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 110°F. Water this hot can cause

the relief valve to discharge refrigerant or damage controls.

Piping must be supported to eliminate weight and strain on the fittings and connections. Chilled water piping

must be adequately insulated. Sufficient shutoff valves must be installed to permit draining the water from the

evaporator or condenser without draining the complete system and to allow vessel isolation.

Filtering and Treatment

Owners and operators must be aware that if the unit is operating with a cooling tower, cleaning and flushing

the cooling tower is required. Make sure tower blow-down or bleed-off is operating. Atmospheric air contains

many contaminants, which increases the need for water treatment. The use of untreated water will result in

corrosion, erosion, slime buildup, scaling, or algae formation. Water treatment service must be used. Daikin

is not responsible for damage or faulty operation from untreated or improperly treated water.

pecial care must be taken when utilizing open system water that is usually not treated (such as lakes, rivers,

and ponds). Special tube and water head material may be required to reduce damage from corrosion.

A cleanable 20-mesh water strainer must be installed in both vessels’ water inlet lines.