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Andrews PAC22 Series 2 Handleiding

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Operating Instructions - PAC22 Series 2
Click www.andrews-sykes.com or Call Us Free 0800 211 611
Routine Maintenance
The air filter must be kept clean, never allow to become choked with dust or dirt.
If allowed to do so, the performance of the unit will become impaired, resulting in
loss of air flow, freezing up the evaporator coil and possible component damage.
To access the filter, lift out the return air grille on the front face of the unit, (fig. 4).
On refitting the filter ensure that it is correctly positioned covering the whole face
of the grille.
The filter (see fig. 4) can be washed in warm, soapy water, rinsed and shaken dry
before replacement. Frequency of cleaning depends upon application and can
only be determined by the user. However, you should never allow more than two
months to elapse between cleaning. The probable life of the filter will be about one
year and spares are available from the supplier of the unit itself. Failure to have filter
fitted during operation will cause serious damage.
The refrigeration circuit inside the room unit is fitted with a HIGH and a LOW
pressure sensing switch. They are both manually re-settable. Necessary access is
provided either via the lower front panel or through the control console. A pencil or
screwdriver with gentle pressure on the knob behind is all that is required to re-set.
HOWEVER, DO NOT ATTEMPT TO RE-SET WITHOUT FIRST DISCOVERING
WHY THE TRIP OCCURRED IN THE FIRST PLACE
Installation
USE THE CHAINS PROVIDED TO SUPPORT THE HEAT EXCHANGER - IT
WOULD BE HIGHLY DANGEROUS TO SUPPORT THE HEAT EXCHANGER BY
MEANS OF THE FLEXIBLE LINES ALONE.
In operation the room unit is constantly condensing water vapour out of the
atmosphere (reducing relative humidity). This water has to be drained away, An
automatic condensate pump is fitted inside the room unit. The flexible hose outlet
from the condensate pump runs to the outside, inside the flexible sheath and the
condensate is deposited in the base of the heat exchanger, but please remember
that there will also be a degree of dripping through the base of the heat exchanger.
HAVE GREAT REGARD FOR THIS CHARACTERISTIC WHEN POSITIONING THE
EXTERNAL HEAT EXCHANGER
The flexible water pipes should be routed so as to avoid any possibility of kinking
or unnecessary restrictions to the flow of water inside. Also, remember that plastic
and rubber becomes much more flexible when warm and. as a result, much more
susceptible to distortion.
Machine Link-Up
Ensure the mains supply lead to the room unit is disconnected, A 5m (extendable
to 30m) line set to connect all services between the room unit and the external
heat exchanger will have been suppled. The water pipe connections are by means
of ‘quick connect couplers’ . These are simple ‘push-on’ connectors which,
when disconnected (after pulling back sprung loaded locking ring), re-seal the
water system on either side. The complete system will have been filled with the
necessary amount of water/ antifreeze prior to its arrival on site. A water proof 3
pin quick connect electrical coupler (push fit with screw lock ring, hand tight only),
and condensate drain pipe coupler 6mm clear polythene (push fit), should also be
connected. Having made the couplings, the system is operational immediately.
Room Water Levels
The water system in the room unit will be to the correct level when delivered.
However if for some reason the level has fallen, antifreeze (33%) and water will
have to be added. The header tank filler and level indication (fig. 2) is located to the
rear of the room unit and can be accessed by removing the two screws holding
the security plate over the filter tank cap. Ensure the machine is running in cooling
mode before removing the header tank cap, and as with all the pressure caps,
remove slowly. It is recommended that a mixture, by volume, of one part antifreeze
to two parts water is utilised, this will prevent freezing down to an external
temperature of -20C/-5F.
This unit MUST be transported and operated in the upright position at all times.
Electrical Supply
WARNING! As standard this unit requires a 13 amp fused electrical supply rated at
230 volts. -1N, 50Hz.
The unit will operate from a standard 13A wall socket. The size of any extension
cable that may be 2-5mm² minimum up to a maximum length of 10 metres. For
longer lengths 4mm² cable must be used. If the cable is on a ‘cable drum’ then
ensure that it is completely unwound; serious complications will occur otherwise.
System Description
The system comprises a room unit cooling section, an external heat exchanger
and the two are interconnected by means of a flow and return water pipe and
an electrical supply to the heat exchanger fan. The room unit is fitted with an
automatic condensate disposal pump which discharges the condensate via a small
plastic pipe into the base of the external heat exchanger and all interconnecting
pipes and electrics are enclosed in a flexible plastic sheath. In addition, both ends
of each pipe are fitted with ‘quick connect’ couplings that open on coupling but
reseal to become water tight on disconnect.
Airflow
The angled air outlets at the top of the room unit are fitted with air grilles that
allow the angle of air outlet to be adjusted vertically and horizontally and,
in conjunction with the fan speed control switch, the air velocity and direction
can be carefully set up to obtain maximum coverage of the area being
cooled without causing drafts. Care should be taken to avoid outlet air being
obstructed as this will cause the air to ‘eddy’ around the unit resulting in
recirculation and short/inaccurate cycling of the machine. Ideally, cold air should
be directed to create a ‘blanket’ all across the ceiling area allowing natural
convection to drop the air over the whole area at very low velocity.
Siting
Ideally, the room unit should be positioned equidistant along he shortest wall
in the room blowing down the length of the room. Of there is more than one
unit in the same area, then they would normally be positioned side by side, and
equidistant along the long wall, all pointing in the same direction. Sometimes it
may be necessary to position units around the perimeter of an area but, in this
case, great care should be taken to avoid one unit blowing cold air straight into
another which will adversely affect the machine operation. Good and correct
air flow is, perhaps, the single most important aspect of satisfactory applying
portable air conditioners. If in doubt seek the advice of your supplier.
The heat exchanger must stand external to the area being cooled and,
preferably, in the outside atmosphere. It can stand freely on a flat surface or may
be hung in the upright position, from a window-sill, balcony etc. (see fig. 1).
2

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