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○ During long periods of inactivity, it is advisable to drain the water
from the system.
○ Water capacity through the exchanger must not go below values
indicated in the section regarding operative limits.
○ The unit cannot be installed on brackets or shelving.
○ It is possible to avoid draining the water by adding ethylene glycol to
the water circuit.
○ In the case of models without a pump, the pump must be installed
with a flow towards the machine water inlet.
○ It is advisable to install an air bleed valve.
○ Once the connections to the unit are made, check that none of the
pipes leak, and bleed the air from the system.
○ Before starting the units, remove the air bleed caps and top up with
water/glycol through the water filling point.
○ High air bleed valves must be installed in the pipes and opened
when the unit is running.
To ensure that the system operates safely and correctly, it is
recommended to implement it with the following devices:
6
4
8
1
1
4
3
8
1
7
1
2
II.8.3
Hydraulic data
Model EQPLB B-S
Hydraulic technical data
Expansion tank capacity
Expansion tank pre-load
Expansion vessel maximum pressure
safety valve
Water contents
Plate heat exchangers (evaporator)
Plate heat exchangers (accessory RC100)
Plate heat exchangers (accessory DS)
Tube and shell heat exchangers (STE accessory)
Tank water content (ASP1/ASP2)
6
4
5
7
3
2
6
5
6
4
5
l
barg
barg
barg
l
l
l
l
l
IN = water inlet
OUT= water outlet
1.
Cut-off valve;
2.
Drain;
3.
Square mesh filter 0,8÷1,6 mm (mandatory);
4.
Thermometer;
5.
Anti-vibration expansion joint;
6.
Manometer;
7.
Flow switch;
8.
Air vent.
Once the connections to the unit are made, check that none of the
pipes leak, and bleed the air from the system.
II.8.1.1
The circulation pump to be installed in the main water circuit should be
selected to overcome any pressure drops, at nominal rates of water
flow, both in the exchanger and in the entire water system.
The operation of the user pump must be subordinated to the operation
of the unit; the microprocessor controller checks the operation of the
pump according to the following logic:
when the start-up command is given, the first device to start is the
pump, which has priority over all the other devices. During the start-up
phase, the minimum water flow differential pressure switch fitted on the
unit is temporarily excluded, for a preset period, in order to avoid
5
oscillations caused by air bubbles or turbulence in the water circuit.
When time has elapsed, the final consent is given to start the machine
and 90 seconds after start-up, the unit pump switches ON. The pump
keeps on working all the time the unit is in operation, and it shuts down
only at the switch-off command. After switch-off, the pump will continue
to operate for a pre-set time before finally stopping, in order to disperse
the residual heat in the water exchanger.
II.8.2
For proper unit operation, a minimum amount of water must be ensured
in the hydraulic system. The minimum water content is determined on
the basis of the unit's nominal cooling capacity.
If the minimum content in the system is reduced, it is advisable to select
the TANK&PUMP accessory complete with inertial storage tank, and
install an additional tank if necessary. However, it is always
recommended to use a storage tank with greater system water content
in process applications to guarantee high system thermal inertia.
4360
4390
4435
5500
6540
24
24
24
24
2
2
2
2
10
10
10
10
6
6
6
6
32
32
39
44
32
32
39
44
2 x 3 2 x 3 2 x 3
2 x 3 2 x 3 2 x 4 2 x 4 2 x 4 2 x 10 2 x 10 2 x 10 2 x 10
144
144
144
194
700
700
700
1000 1000 1000 1000 1000 1000 1000 1000 1000
70
SECTION II :: INSTALLATION AND MAINTENANCE
Installation and management of utility pump
outside of unit
Minimum hydraulic circuit contents
6590
6635
6670
7730
24
24
24
24
24
2
2
2
2
10
10
10
10
10
6
6
6
6
44
53
60
60
83
44
53
60
60
83
194
232
232
232
407
8790
8830
8860
24
24
24
2
2
2
2
10
10
10
6
6
6
6
83
92
92
83
92
92
407
386
386
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