Electrical Connections; Installation Checks - Veco CLIMMA CWS DC INVERTER Series Installation, Usage And Maintenance Manual

Manifolds should be installed to be accessible for maintenance. If calibrating valves are installed, they
have to be completely opened.
HOSES
The water circuit must be as simple and straight as possible, avoiding bends, loops.
EXPANSION TANK
The expansion tank allows the water in the system to expand as it gets hot when the chiller is in heat
mode and it also acts as a cushion. The expansion tank has to be installed in the fresh water pump inlet.
AIR-BLEEDER
The automatic air bleeder must be installed on the pump outlet. This will prevent that any air in the
circuit reaches the fan coils and all the legs of the circuit.
ANTIFREEZE SOLUTION
The fresh water circuit needs to be filled with water (80%) and antifreeze (20%). Antifreeze will prevent
water and pipes from freezing. Antifreeze also reduces the corrosion inside the fresh water circuit.
Always check that the pressure gauge shows 1.5 Bar in the fresh water circuit.
We suggest two methods for filling the fresh water circuit with antifreeze:

Calculate approximately the circuit capacity; Fill the circuit with water and add to it 20% of
antifreeze, using the second charging valve by gravity or using a pressure pump. Then connect
the circuit to the sanitary water circuit of the vessel, pressurize up to 1.5 Bar and start purging the
air. It is obvious that if purging will be difficult the percentage of antifreeze will decrease, as more
water will be needed to fill the circuit, therefore more antifreeze must be added to the circuit.

Empty the circuit from the water used for leak test. Prepare an antifreeze solution of the quantity
needed to fill the circuit, made with 20% of antifreeze liquid; fill the circuit using a pressure pump.
Then proceed with purging air and topping up the pressure using the solution.

2.9. Electrical connections

The unit must be installed on a dedicated circuit with a rated thermal-magnetic circuit breaker. The
circuit breaker and electric cables (power supply) must be rated for the unit and comply with all local and
national codes.
The manufacturer will not be held responsible for damage or injuries due to improper installation.
Incorrect installation will void the Manufacturer's warranty.
The electrical control box is already connected by Veco; to install the electrical box:

Connect the power supply to the electrical box

Connect the sea water pump to the electrical box

Connect the circulation (fresh) water pump to the electrical box
Please refer to instruction C896 or to the Electrical schematic in this manual.
2.10.

Installation checks

The following checks MUST be made during the initial field start-up:

Check all wire connections.

Check electrical input.

Check the standard pressure in the refrigerant system.

Check the expansion valve during operation.
Note: If the unit and/or remote condensing unit were not transported in an upright position, or has been
overturned during the installation process, allow them to stand, in an upright position, at least 4 hours
before starting the unit.
Veco S Installation Manual –Page 8 / 20