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OPERATING
–
Do not use other than the designated refrigerant (for charging, adding or
recharging).
–
Do not use the refrigeration equipment or components for any utilization other
than that for which it is designed.
–
Comply with the special manufacturers recommendations contained in the
manufacturers operating instructions.
–
It is strictly prohibited while the device is running to remove the guards and
panelling provided by the manufacturer to protect the user and ensure his
safety.
–
When operating, surface temperatures above 60°C and /or below 0°C may be
reached. During any servicing operation, the personnel should be extremely
careful while working on the device.
–
Profroid is not informed to real use of partly completed machines; their
integrations and use must comply with Machines Directive and
recommendations of these operating instructions.
–
Results of design calculations, checks, and test reports in relation with low
voltage directive are archived.
Water cooled QUIETCO2OL features
–
The cooling fluid of the Water Cooled QUIETCO2OL must either be water or
a mixture of water and MEG (maximum MEG concentration: 40%).
–
The inlet temperature of this fluid must be in a -8°C/+38°C range. The
nominal range is between +7°C and +12°C.
–
The water circuit is equipped with a ball valve which allows regulating the by-
pass of the gascooler.
–
A thermostatic control valve allows controlling the water flow which passes
through the intercooler on the LT versions. This valve operates by measuring
the temperature of the refrigerant on the CO2 outlet of the heat exchanger.
–
When dimensioning the water circuit, the installer must take into account the
pressure losses of the water pipes and the exchanger(s). The following table
shows a rough estimate of the pressure losses depending on the water flow :
Fluid
Inlet water (°C)
Outlet water (°C)
Flow
3
(m
MT30
1,34
MT50
2,29
MT67
2,97
MT100
4,09
LT75
1,22
LT167
2,71
EG 35%
-8°C
-4°C
Pressure
Flow
/h)
loss (kPa)
(m
30
0,90
34
1,54
32
2,00
50
2,71
20
0,9
32
2,01
H2O
+7°C
+12°C
Pressure
Flow
3
/h)
loss (kPa)
(m
12
0,86
15
1,45
14
1,88
20
2,61
10
0,88
18
1,95
H2O
+15°C
+20°C
Pressure
3
/h)
loss (kPa)
(m
9
11
11
19
8
17
EG 35%
+30°C
+35°C
Flow
Pressure
3
/h)
loss (kPa)
0,92
11
1,57
13
2,03
13
2,82
22
0,91
10
2,06
21
66
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