instruction and operation manual ZHK NANO
V04-18
49 / 116
Switches or junction boxes mounted on the outside of rooftop units must also have at least protection
class IP55.
For units with integrated control and lighting, an additional power supply for the lighting must be
provided and separated from the power supply for the control cabinet. This ensures that the light
also can be switched on during repair work, despite repair switch is switched off (prerequisite for
access to the AHU).
8 Commissioning
8.1 Preliminary
steps
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Clean thoroughly the AHU and all components of dust, swarf and other debris.
-
Remove all loose parts like tools, etc. and documentation from the unit. Such parts can be
sucked in by the fan and lead to its destruction.
-
check all bolt connections and electrical connections and retighten if necessary
-
Ensure that the duct pressure corresponds to the pressure for the nominal air flow and the
pressure specified in the technical data sheet.
-
Ensure that all planned filters are mounted. Not mounted filters can overload the fan motor.
-
All cables must be checked for damage to the insulation and replaced if necessary.
Here are given some points, which could cause problems after transport or not appropriate unit
handling.
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Rotate the impeller of the fan by hand, to check whether it rotates freely.
-
Check the motor connection and the matching of the supply voltage at the rated voltage - a
fluctuation of supply voltage b -5% is permitted.
Summary of Contents for ZHK NANO
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