CIAT HYDROCIAT LW HE Series, Manual

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39
HYDROCIA
T L
W
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 18.752 B
Water chillers
Heat pump
i
nstallation RecommenDations
n
Water quality requirements
The quality of the water used has a direct impact on the correct
operation of the unit and its service life. This holds particularly true if the
water used may clog or corrode components or promote the growth of
algae or microorganisms.
The water must be tested to determine whether it is suitable for use
with the unit.
Determine whether or not chemical treatment is necessary and
sufficient to bring the water to an acceptable quality.
The results of the test must confirm whether the water is compatible
with the materials used on the unit’s circuit.
Important : failure to follow these instructions will result in the
immediate voiding of the unit warranty.
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Lifting and handling operations
The utmost safety precautions must be taken when lifting and handling
the unit.
Always follow the lifting diagram on the unit and in the installation,
operation, commissioning and maintenance manual.
Before attempting to lift the unit, make sure the path leading to its
intended location is free from obstacles.
Always keep the unit vertical when moving it. Never tip it or place it
on its side.
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Location
HYDROCIAT units are designed for installation inside equipment
rooms.
Precautions should be taken to protect it from freezing temperatures.
Special attention should be paid to ensure sufficient free space
(including at the top) to allow maintenance.
The unit must be placed on a perfectly level surface strong enough to
support it once ready for operation.
Noise pollution from auxiliary equipment such as pumps should be
studied thoroughly.
Potential noise transmission routes should be studied, with assistance
from an acoustical engineer if necessary, before installing the unit.
Flexible couplings must be placed over pipes (available as options).
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Machine room ventilation
Local regulations may require a supply of fresh air inside equipment
rooms to prevent the build-up of unpleasant or hazardous vapours in
the event of a refrigerant leak.
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Installation of accessories delivered
separately
A number of optional accessories may be delivered separately and
installed on the unit at its location.
Always follow the instructions in the installation, operation,
commissioning and maintenance manual.
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Electrical connections
Always follow the instructions in the installation, operation,
commissioning and maintenance manual.
All information concerning electrical connections is stated on the wiring
diagrams provided with the unit. Always follow this information.
Electrical connections must be made in accordance with best current
practices and applicable standards and regulations.
Electrical cable connections to be made on-site:
- the unit’s electrical power supply
- contacts available as standard and optional for controlling the
machine remotely.
It should be noted that the unit’s electrical system is not protected
against lightning strikes.
Components to protect against transient voltage surges must be
installed on the system and inside the electrical power supply unit.
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Pipe connections
Always follow the instructions in the installation, operation,
commissioning and maintenance manual.
All pipes must be correctly aligned and slope toward the system's
drain valve.
Pipes must be installed to allow sufficient access to the panels and
fitted with heat insulation.
Pipe hangers and clamps must be separate to avoid vibrations and
placing pressure on the unit.
Water flow shut-off and control valves must be fitted when the
unit is installed.
Pipe connections to be made on site:
- water supply with pressure-reducing valve
- evaporator, condenser and drain
The following are a few examples of accessories essential to any
hydraulic system and which must also be installed:
- thermostatic valve on the condenser water inlet or outlet to regulate
the flow of cooling water.
- water expansion vessel
- drain nozzles at pipe low points
- exchanger shut-off valves equipped with filters
- air vents at pipe high points
- check the system’s water capacity (install a buffer water tank if
necessary)
- flexible couplings on exchanger inlets and outlets
- thermometers on each water inlet and outlet to allow all the
necessary checks during start-up and maintenance.
Important:
- Pressure in the water circuits below 10 bar.
- Place the expansion vessel before the pump.
- Do not place any valves on the expansion vessel.
- Make sure the pressure of the water drawn in by the circulation
pumps is greater than or equal to the required minimum NPSH,
particularly if the water circuits are open”.
- Test the water quality in accordance with the relevant technical
requirements.
- Protect the unit and hydraulic system from freezing temperatures
(such as by including a drain. If glycol is added to prevent freezing,
check its type and concentration beforehand.
- Before making any final hydraulic connections, flush the pipes with
clean water to remove any impurities from the system.