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4. Instalation (cont.)
4.10. Water Connections
Regarding the size and position of the inlet and outlet water
connections, refer to the dimensional drawings provided with
the unit. The water pipes must not transmit any radial or axial
force or vibration to the heat exchangers.
The water supply must be analyzed and properly fi ltered and
treated, as well as the control devices, insulation and drain
valves in order to prevent corrosion, dirt and deterioration of
the pump components. Consult a water treatment specialist
or specialized literature on the subject.
Design, installation and operation precautions
The water circuit should be designed to have the lowest
number of corner "knees" and horizontal pipes at diff erent
levels. The following are the main connection items to be
tested / checked:
•
The water inlet and outlet shown in the unit are correct.
•
Install manual or automatic air drain valves at high points
in the circuit.
•
Use an expansion device to maintain pressure in the system
and install a safety valve as well as an expansion tank. It can
be supplied optionally.
•
Install thermometers in the water inlet and outlet.
•
Install drain connections at all low points to allow the entire
circuit to be drained.
•
Install stop valves, close the inlet and outlet water
connections.
•
Use fl exible connections to reduce the transmission of
vibrations.
•
Insulate all piping after testing for leaks, both to reduce
thermal bridges and to prevent condensation.
•
Installing a screen fi lter in front of the pump, when there
are particles in the fl uid that may block the heat exchanger.
The fi lter should be Mesh 40. The optional Y fi lter + Victaulic
are provided with this fi lter.
•
Install thermometers and pressure gauges in the inlet and
outlet water connections.
IMPORTANT
The units which are not supplied with the fi lter + Victaulic
kit must be installed as close to the heat exchanger as
possible in a position that is easily accessible in case of
removal or cleaning. The plate heat exchanger can get
easily dirty during initial start-up as it complements the
fi lter function, and the unit operation will be impaired
(reduced water fl ow rate due to increased pressure drop).
32
IMPORTANT
Depending on the weather conditions in your area, you
should:
• Add ethylene glycol with appropriate concentration to
protect the installation of a temperature of 10 ° C below
the lowest temperature likely at the installation site.
• If the unit is not used for an extended period, it is
recommended to drain it, and as a precaution introduce
ethylene glycol in the heat exchanger, through the
connection of incoming water drain valve. At the
beginning of the new season, refi ll with water, add an
inhibitor and do the recommended treatment (see
section 6.4).
• The installer must comply with basic standards for
the installation of auxiliary equipment, especially the
maximum and minimum fl ow limits, which must be
between the values listed in the operating limit table.
(Application Data)
IMPORTANT
In order not to void the equipment warranty, the chilled
water pumps of the unit must be actuated by chiller
control, avoiding severe damage to the evaporator. Refer
to the Product Catalogue or selection program according
to the operating conditions of the unit to evaluate the
recommended operating conditions. See the specifi c
wiring diagram for more detailed information about fi eld
interconnections for your unit.
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