McQuay MCK025A Spezifikationen PDF herunterladen (Seite 18)

Preliminary Site Survey

Electrical supply and installation is to conform to LOCAL AUTHORITY's (e.g. National Electricity Board) CODES

and REGULATIONS.

Voltage supply fluctuation must not exceed ± 10% of rated voltage. Electricity supply lines must be independent

of welding transformers which can cause supply fluctuation.

Ensure that the location is convenient for wiring and piping.

Mounting

For ceiling mounted models, locate a position where piping and ducting work can be kept to a minimum.

Ensure that overhead supports are strong enough to hold the unit's weight. Position hanger rods and check for

alignment with the unit. Check that hangers are secure and that the base of fan coil unit is level in two horizontal

positions.

Piping

Drain and water piping must be accurately connected.

Please refer to "Specification Sheet" for piping sizes.

Piping Support

All water mains must be adequately supported to carry the necessary weight involved, provisions must be

made by the installing contractor to allow for adequate free movement of all vertical and horizontal risers and

run outs. Due to the fact that cold water will be circulated through the water mains, a sizeable movement of the

water mains can be expected due to contraction. If for example, the piping is rigidly supported with no provision

for movement, it is very possible that the tubing of fitting may be broken causing water leakage in the condi-

tioned spaces throughout the building.

Coil Venting

Each standard basic unit coil is equipped with a manually operated air vent which is installed at the end of a

small copper line leading into the highest point of the coil. By means of this valve, air may be vented manually,

from the coil to keep it operating at full capacity. When water is first introduced into a coil, air is sometimes

trapped in the coil tubing. This trapped air will reduce cooling capacity and create "Bubbling" or "Clanking"

noise within the units. To release air trapped in the coil, press the air vent head to allow air to flow out of the air

vent opening. Release when a steady stream of water appear.

Electrical Connection

As wiring regulations differ from country to country, please refer to your LOCAL ELECTRICAL CODES for field

wiring regulations and ensure that they are complied with. Besides, take note of the following general precau-

tion:

1) Ensure that the rated voltage of the unit corresponds to the name plate before commencing wiring work.

2) Provide a power outlet to be used exclusively for each unit and a power supply disconnect and a circuit-

breaker for over-current protection should be provided in the exclusive line.

3) The unit must be EARTH to prevent possible hazards due to insulation failure.

4) All wiring must be firmly connected.

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McQuay MCK025A Spezifikationen Seite 18