17
5 x D mini
5 x D mini
9.10 - Flow controllers
9.10.1 - Cooler flow switch and chilled water pump inter-
lock
IMPORTANT
It is mandatory to install cooler flow switch and also to
connect chilled water pump interlock on 30HXC and 30GX.
Failure to this instruction will void Carrier guarantee.
The cooler flow switch controller is factory supplied and wired
on 30HXC and 30GX units.
Follow the manufacturer instruction for installation.
The flow switch may be mounted in a horizontal pipe or a
vertical pipe with upward liquid flow. It should not be used
when liquid flow is downwards.
Mount in a section of pipe where there is a straight run of at
least five pipe diameters on each side of the flow switch. Do
not locate adjacent to valves, elbows or orifices. The paddle
must never touch the pipe or any restriction in the pipe. Screw
the flow switch in position so the flat part of the paddle is at
right angles to the flow. The arrows on the cover and in the
bottom, inside the case, must point in the direction of the flow.
The switch should be mounted so that the terminals are
accessible for easy wiring.
Terminals 34 and 35 are provided for field installation of a
chilled water pump interlock (auxiliary contact of chilled water
pump contactor).
(Pipe connection: 1" NPT)
10 - INSTALLATION
10.1 - Check equipment received
• Inspect the unit for damage or missing parts. If damage is
detected, or if shipment is incomplete, immediately file a
claim with the shipping company.
• Confirm that the unit received is the one ordered.
Compare the nameplate data with the order.
• Confirm that all accessories ordered for on-site installation
have been delivered, and are complete and undamaged.
• Do not store units in an area exposed to weather because of
sensitive control mechanism and electronic devices.
10.2 - Moving and siting the unit
10.2.1 - Moving
Do not remove skids, pallets or protective packaging until the
unit is in its final position. Move the chiller using tubes or
rollers, or lift it, using slings of the correct capacity.
CAUTION (30HXC)
Only use slings at the designated lifting points which are
marked on the unit, on the top of the cooler heat exchanger.
Rigging from the bottom of the heat exchanger will cause the
unit to be lifted unsafely. Personal injury or damage to the
unit may occur. Follow the rigging instruction given on the
certified dimensional drawing supplied with the unit.
10.2.2 - Siting
Always refer to the chapter "Dimensions and clearances" to
confirm that there is adequate space for all connections and
service operation. For the center of gravity coordinates, the
position of the unit mounting holes, and the weight distribution
points, refer to the certified dimensional drawing supplied with
the unit.
We recommend that these chillers be installed either in a
basement or at ground level. If one is to be installed above
ground level, first check that the permissible floor loading is
adequate and that the floor is strong enough and level. If
necessary, strengthen and level the floor.
With the chiller in its final location remove the skids, and other
devices used to aid in moving it. Level the unit using a spirit
level, and bolt the unit to the floor or plinth. Operation of these
units may be impaired if they are not level and not securely
fixed to their mountings. If required use isolation pads under
the unit to aid in vibration isolation.
9.10.2 - Condenser flow switch (30HXC)
The condenser flow switch is a field-installed device.
5 x D MIN.
5 x D MIN.
FLOW
FLOW
FLOW
Summary of Contents for 30GX Series
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