Carrier GY Instructions d'exploitation télécharger pdf (Page 10)

Water connections

Refer to the certified dimensional drawings for the sizes and

positions of all water inlet and outlet connections. The water

pipes must not transmit any radial or axial force to the heat

exchangers or any vibration to the pipework or building.

The water supply must be analysed and appropriate filtering,

treatment, control devices, isolation and bleed valves and

circuits built in, as necessary. Consult either a water treatment

specialist or appropriate literature on the subject.

Operating precautions

The water circuit should be designed to have the least number

of elbows and horizontal pipe runs at different levels. Below

the basic checks to be done (see also the illustration of a typical

hydraulic circuit below).

• Note the water inlets and outlets of the heat exchangers.

• Install manual or automatic air purge valves at all high

points in the water circuit.

• Use an expansion chamber or an expansion/relief valve to

maintain pressure in the system.

• Install water thermometers in both the entering and

leaving water connections close to the evaporator.

• Install drain valves at all low points to allow the whole

circuit to be drained. Connect a stop valve in the drain line

before operating the chiller.

• Install stop valves, close to the evaporator, in the entering

and leaving water lines.

• Use flexible connections to reduce the transmission of

vibration to the pipework.

• Insulate all pipework, after testing for leaks, both to

reduce thermal leaks and to prevent condensation.

• Cover the insulation with a vapour barrier.

Expansion tank

Filter

Air vent

Flow switch

Heat exchanger

Flexible connection

Drain

Pressure tap

Thermostat sleeve

Typical hydraulic circuit diagram

Control valve

Fill valve

Buffer tank

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 19 20

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Carrier GY Instructions d'exploitation Page 10

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