Acson international AWSS30A, Technical Manual

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Water Loop Piping
The piping connected to the units has to be firmly secured and properly sealed. It is recommended that
flexible hoses be used to connect water piping to the unit. It will reduce or eliminate noise transmission (if
any) to the main water piping. Do not over tighten the connections. It will cause water leaking or damage the
adaptors thread. Shut off valves at supply (water inlet) and water return (water outlet) are required as it will
be used for any future service or maintenance work without affecting water flow to other units. The strainer
will filter out the dirt or other foreign material. A balancing valve will be used to balance the system. The
piping system should be cleaned and flushed prior to operation. Make sure all shut off valves is in the open
position before operating the unit. To ensure a proper water flow, the differential water temperature between
inlet and outlet should be 5°C (41°F) to 8°C (46.4°F).
Electrical Connections
Wiring regulations differ from country to country. All field wiring must comply with your LOCAL ELECTRICAL
CODES. All safety precautions need to strictly adhere.
General Precautions
• Ensure the rated voltage and phase of the unit corresponds to the unit name plate before carrying
out wiring.
• Provide a power outlet to be used exclusively for each unit. A power supply disconnect and circuit
breaker for over current protection should be provided in the exclusive line.
• The unit must be GROUNDED to prevent hazards due to insulation failures.
• All wiring must be firmly connected.
• All wiring must not touch on the hot refrigerant piping, compressor or any moving parts.