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Installation
4
INSTALLATION
4.1 Positioning of the unit
Before installing the unit, make sure that the
structure of the building and/or the support-
ing surface can withstand the weight of the
appliance. The weights of the units are list-
ed in Chapter 8 of this manual.
These units have been designed for outdoor installa-
tion on a solid surface. Standard accessories include
antivibrating rubber supports, that must be posi-
tioned under the base.
When the unit is to be installed on the ground, it is
necessary to provide a concrete base, to ensure a
uniform distribution of the weights.
As a general rule, no special sub-bases are required.
However, if the unit is to be installed on the top of in-
habited rooms, it is advisable to rest it on vibration
isolators, that will minimise the transmission of any
vibration to the structures.
To choose the place of installation of the unit, bear in
mind that the place of installation must be have all
the necessary spaces for air circulation and mainte-
nance operations (see Chapter 9).
4.2 Vibration Isolators
Vibration isolators are recommended for all roof
mounted installations or wherever vibration transmis-
sion is a consideration (see chapter "Dimensional
Data" for the location of each isolator).
Unit
Legends:
I:
Pressure gauge connection
S/S1: Gate valve
Fl:
Flow meter
Vibration eliminators in all water piping connected
to the units are recommended to avoid straining the
piping and transmitting vibration and noise.
4.3 External hydraulic circuit
The external hydraulic circuit must ensure
the water flow to the evaporator under any
working conditions and with any adjust-
ment.
The external hydraulic circuit should consist of the fol-
lowing elements:
A circulation pump which delivers a sufficient wa-
h
ter flow and discharge head.
The capacity of the primary hydraulic circuit
h
should not be less than 7 litres/KW of cooling ca-
pacity, in order to prevent the repeated start-up of
the compressor and any damage to it. If the water
capacity in the primary piping of the circuit and in
the evaporator is lower than this value, an insulat-
ed storage tank shall be installed.
A membrane expansion vessel provided with safe-
h
ty valve with vent, that must be visible.
Flow meter installation
External hydraulic circuit
Connection diagram
GA:
Flexible hoses
R:
Drain cock
T:
Thermometer
F:
Filter
Page 11
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