Airedale SmartCool 11-233kW Manuel d'utilisateur télécharger pdf (Page 24)

SmartCool

- D

Precision Air Conditioning

Installation, Maintenance and Commissioning Manual :6877419 02/2013

Installation Data

Evacuation

Evacuation for systems operating on R410A refrigerant should be carried out as follows

1 The procedure should be carried out using a high vacuum pump. The pump should

be connected to the high and low pressure sides of the system via a gauge manifold

fitted with compound gauges. A high vacuum gauge should be fitted to the system at

the furthest point from the vacuum pump.

2 Triple evacuation should be used to ensure that all contaminants are removed or at

least reduced to significantly low proportions.

3 The vacuum pump should be operated until a pressure of 1.5 Torr (200 Pa) absolute

pressure is reached, at which time the vacuum pump should be stopped and the

vacuum broken with oxygen free nitrogen until the pressure rises above zero.

4 The above operation should be repeated a second time.

5 The system should then be evacuated a third time but this time to 0.5 Torr (absolute

pressure and broken with the correct refrigerant, until pressures equalise between

the charging bottle and the system.

RECORD

Record on commissioning sheet provided once completed.

IMPORTANT

It is important that solenoid valves are energises correctly to ensure that the Hot Gas

Reheat Coil is fully evacuated. (The Normally Closed (NC) valve should be energised).

The use of a magnetic coil lifter is recommended.

CAUTION

Ensure that the

vacuation gauge is isolated before introduc

ing any pressure. The

gauge may become dangerous when exposed to any positive pressure.

Installation

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Airedale SmartCool 11-233kW Manuel d'utilisateur Page 24