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The sea water circuit includes: a sea water pump sized according to the chiller capacity, a sea water intake
and outlet and a sea water strainer.
3
The sea water in the circuit should not exceed 0.6 m
/h every 12.000 Btu/h (2,64 GPM or 10 lt/m per 1
TON) of chiller capacity.
Chiller rated capacity is guaranteed at 20°C (68°F) sea water temperature; the system will work in cool
mode up to 40°C (104°F) and in cool mode with a sea water temperature up to 5°C (41°F).
The sea water circuit must always have an uphill incline from the sea water inlet to the chiller condenser
to prevent the system to run properly. All hoses should be installed as straight as possible with no loops
and bends.
All metal components of the sea water circuit must be properly grounded.
SEA WATER PUMP
The sea water pump has to be properly secured on a leveled surface in order to operate correctly; Use the
special fixing kit with anti-vibration supports.
The sea water pump has to be installed below the water line in order to operate correctly.
SEA WATER INTAKE
Sea water intake has to be installed as far below the water line to ensure always that no air enters the sea
water circuit.
SEA WATER STRAINER
Sea water strainer has to be installed between the sea water intake and the sea water pump and it must
be accessible for cleaning operations. The strainer has to be cleaned periodically.
WARNING: Sea water strainer is mandatory in the seawater circuit. Failure to install the sea water strainer
will void the warranty.
SEA WATER OUTLET
The sea water outlet has to be installed above the sea water line, but as close as possible to it to reduce
noises.
2.8. Other system components: fresh water circuit
The fresh water circuit is a closed loop bringing water from the chiller to the fancoils and then back to the
chiller again. The circuit has the following components: a fresh water pump, flow switch, manifolds,
hoses, an expansion tank and an air-bleeder; everything is sized accordingly to the fancoils number, type
and overall capacity.
Water pressure in the circuit must be between 1 and 1.5 Bar (14.5 and 22 psig).
FRESH WATER PUMP (CIRCULATION PUMP)
The fresh water pump must be installed near the Climma DC chiller. The pump has to be installed on the
return line of the fresh water circuit, pumping water directly in the chiller and then to the fancoils.
FLOW SWITCH
Flow meter has to be installed on the fresh water circuit and it has to be accessible for maintenance.
The flow meter switch is mandatory safety equipment that will stop the system whenever the fresh water
flow stops or if it is not enough.
The flow meter switch has to be connected to the main electrical box of the unit as specified in the
electrical schematic.
Make sure that the flow meter is correctly connected to the control box. To test it, simulate a low flow
situation pressing the lever inside the cover of the switch.
MANIFOLDS
Veco S
Installation Manual –Page 7 / 20
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