HRAT E - HRAT/HRAN
6
English 09/02
INSTALLATION
HYDRAULIC CONNECTIONS
CHOICE OF INSTALLATION SITE
Before installing the unit, agree with the customer the site
where it will be installed, taking the following points into
consideration:
- check that the fixing points are adequate to support the
weight of the unit;
- pay scrupulous respect to safety distances between the unit
and other equipment or structures to ensure that air enter-
ing the unit and discharged by the fans is free to circulate.
- The unit must be installed in a space designed to house
technical installations dimensioned according to current
legislation in the country concerned and large enough to
allow access for maintenance.
If this is not possible,
then use of the protection grill kit is indispensable
(HRAT-HRAN only).
POSITIONING
Before handling the unit, check the capacity of the lift equip-
ment used, respecting the instructions on the packaging.
To move the unit in the horizontal, make appropriate use
of a lift truck or similar, bearing in mind the weight distrib-
ution of the unit. To lift the unit, insert tubes long enough
to allow positioning of the lifting slings and safety pins into
the special holes in the bed plate of the unit.
To avoid the slings damaging the unit, place protection
between the slings and the unit.
Position the unit in the site indicated by the customer.
Place either a layer of rubber (min. thickness 10 mm) or
vibration damper feet (optional) between the bed plate
and support surface.
Fix the unit, making sure it is level and that there is easy
access to hydraulic and electrical components.
If the site is exposed to strong winds, fix the unit ade-
quately to the support surface using tie rods if necessary.
If a heat pump unit is being installed, fit a condensate col-
lection pan (available as accessory).
The choice and installation of components is the responsi-
bility of the installer who should follow good working prac-
tice and current legislation. Before connecting the pipes,
make sure they do not contain stones, sand, rust, dross or
other foreign bodies which might damage the unit.
Construction of a by-pass is recommended to enable the
pipes to be washed through without having to disconnect
the unit (see drain valves).The connection piping should be
supported in such a way as to avoid it weighing on the unit.
It is recommended that the following devices are installed
in the hydraulic circuit of the evaporator.
1. Two pressure gauges with a suitable scale (inlet and outlet);
2. Two vibration damper joints (inlet and outlet);
3. Two gate valves (normal in inlet and calibrating in outlet);
4. A flow switch (in inlet) or a differential pressure switch
(inlet-outlet);
5. Two thermometers (inlet and outlet);
6. An inlet filter as close as possible to the evaporator and
positioned to allow easy access for routine maintenance.
The flow of water to the refrigerating assembly must con-
form to the values given on page 17-18. The flow of water
must be maintained constant during operation.
The water content of the unit must be such as to avoid
disturbing operation of the refrigerant circuits.
See the values given on page 26.
9
16
8
9
7
2
4
1
15
11
12
15
15
10
13
14
13
2
3
5
6
T
6
T
F
1
1
1
Pressure gauge
2
Vibration damper joint
3
Gate valve
4
Calibrating valve
5
Flow switch
6
Thermometer
7
Pump
8
Safety valve
9
Air vent
10 Expansion tank
11 Filter
12 Top-up
13 Temperature sensor
14 Differential pressure switch
15 Drain/chemical washing valve
16 Automatic air vent (only for “plus” tube)
I
A
I
Hydraulic connection diagram
with pump and storage tank (optional)
UTILITY
UNIT
