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Instruction Manual ZHK
V07-21.0 83/140
Figure 182:
Information on the screw distance
6.4.2 Insulation of fresh air damper
Before connecting the duct section, the flange of the fresh air damper must be fully insulated. This
action is imperative to prevent the formation of condensation by heat transfer.
If fresh air dampers are not integrated in the AHU casing, then the damper frame must be insu-
lated.
6.5 Pumps
-
In case of subsequent pump installation, it has to be noted that the intake socket is below the
water surface.
-
The pump base has to be set so low, that the suction tub declines towards the pump.
-
For noise insulation, the foundation shall be executed as the AHU itself (refer to
chapter 4.1
(Foundation)
).
-
Fresh water supply:
The maximum allowable pressure is 300 kPa (3.0 bar).
6.6 Freeze protection measures
It is the custo
mer’s responsibility to provide sufficient freeze protection.
Some possibilities for that
purpose are listed below:
At cooling coils:
-
Complete drainage of the heat exchanger
-
Usage of water/glycol fluid mixtures with adequate glycol concentration. Performance loss must
be considered.