Commissioning; Introduction; Unit Function Danx - Xwps - Dantherm DanX 2/4 XKS Installation, Commissioning And Service Manual

4. COMMISSIONING

4.1 Introduction

When servicing on air handling units always turn off the electricity on the main switch and
the repair switch (complete shut down) and secure for reconnection from unauthorized
persons. Only open the inspection doors when the unit is totally stopped and the fans have
come to a stop. After switching off the unit the fan impeller will run for about 1 to 3 minutes
before stopping totally. The fan wheel must never be stopped by hand or with an object.
Commissioning, maintenance and repair work should only be carried out by trained
specialists or by people supervised by authorized staff. It is the responsibility of the fitter to
read and understand this guide and other given information.
4.1.1 Unit function DanX – XWPS
The DanX – XWPS consist of a cross flow heat exchanger in combination with a compressor
driven heat pump in the same module.
The DanX XWPS is using a minimum of outdoor air which is required for hygienic reasons in
the pool hall. To keep pressure drop low and have a high dehumidification capacity in the
heat pump, only a part of the wet swimming pool air is run through the heat exchanger and
evaporator.
Part of the exhaust air is leaving the unit and part of the exhaust air is re-circulated to join
the outdoor air. These two airstreams are then preheated in the cross flow heat exchanger
and afterwards heated in the heat pump condenser. If the supply air temperature is too low
the re-heater is activated. In this operation mode the dehumidification is obtained with the
dry outdoor air and heat pump. If the dehumidification capacity is not sufficient the amount of
dry outdoor air automatically increases.
For further explanations about the controls of this unit, please refer to the manual of the
control panel.
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