EN
11_11. 6755532_02
We recommend using an equal volume of water in
10 l / kW.
When operating in heat pump during defrosting, this
value can contain acceptable values to reduce the
temperature of the installation, use a value less than
the recommended temperature causes a greater
reduction of ' water.
It is strongly advised not to drop below 4l/kW.
The adjacent table indicates maximum water
capacity in litres of hydraulic plant, compatible with
expansion vessel supplied as standard IN THE VER-
SIONS WITH PUMP ONLY. The values shown in the
table refer to three maximum and minimum water
temperatures. If the effective water content of the
hydraulic plant is greater than that given in the table
at operational conditions, another dimensioned
expansion vessel must be installed, using the normal
criteria, with reference to the additional volume of
water.
On the following tables it is possible to work out
the maximum values of the system also for glycoled
water function.
Values are worked out by multiplying the referred
value by the corrective coefficient.
Standard pressure value of expansion vessel when
empty is 1.5 bar, maximum value is 6 bar.
Calibration of the vessel must be regulated using
the calibration value of the vessel will be 2.3 bar.
If calibration value obtained from formula is less
as standard.
Hydraulic height
Calibration of expansion vessel bar 3.2 2.8 2.3 1.8 1.5
Recommended values of water content. l
257 303 348 394 419
Recommended values of water content. l
116 136 157 177 189
max. min.
10% 104°F / 40°C 28,4°F / -2°C 0,507
10% 140°F / 60°C 28,4°F / -2°C 0,686
20% 104°F / 40°C 21,2°F / -6°C 0,434
20% 140°F / 60°C 21,2°F / -6°C 0,604
35% 104°F / 40°C 21,2°F / -6°C 0,393
35% 140°F / 60°C 21,2°F / -6°C 0,555
Recommended operational conditions:
KEY
Check that highest instal-
lation is not higher than
55 metres.
-
lation can withstand global
pressure in that position.
Number compressor
n° 1 1 1
Recommended minimum water content
l/kW 10 10 10
You should design systems with a high water
content (in the table show the minimum
1. The hourly number of inversions between the various
modes of operation
2. The reduction in water temperature during the
defrost cycles during the winter.
3. Using a lower value than that recommended because
a greater reduction in water temperature
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