Euroclima ZHK, Руководство пользователя

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Instruction Manual ZHK
94/140 V07-21.0
WARNING!
The
safety related and correct implementation of this control
must be car-
ried out
on site. It is the full responsibility of the client to undertake this
task.
The minimum safety requirements described in
chapter 7.6.1
(
AHUs equipped by EUROCLIMA
with control
) have to be ensured and is the full responsibility of the customer to do so.
7.7 Differential pressure restriction for plate heat exchangers
7.7.1 General indications
NOTICE!
Plate heat exchangers are only partly pressure resistant.
Through incorrect installation, commissioning or operation by the user of
the system, the pressure between supply and exhaust air in the plate heat
exchanger could rise inadmissibly and destroy it.
The damages are costly.
The maximum allowed pressure difference of the plate heat exchanger is given in the plate heat
exchanger section
–
supply air in the technical data, see
Figure 195
. In the part of the technical data
of the exhaust air this value is not given, see
Figure 196
.
Possible causes for inadmissible pressure increase:
The following factors can cause an increase in pressure and destroy the plate heat exchanger:
-
Dampers are closed or will be closed or are delayed in opening.
-
Filters were not changed if they reached their final pressure drop.
-
The external pressure drop is higher than calculated.
-
Dampers in the duct system, unintended barriers, closed outlet grille or unfinished duct systems
can lead to additional external pressures.
-
Only one fan is working (supply- or exhaust air), which can increase the pressure in some cases.
7.7.2 Prevention measures
General measures:
Figure 195:
Plate exchanger section in technical data
–
supply air
–
maximum admissible differential pressure
Figure 196:
Plate exchanger section in technical data
–
exhaust air