3
AC25
Electrical installation
The installation, which should be preceded by an om-
nipolar switch with a contact separation of at least 3
mm, should only be wired by a competent electrician
and in accordance with the latest edition of IEE wiring
regulations.
The control system is pre-installed in the air curtain with
an integrated control card.
PLS is supplied pre-programmed with quick-fit
connections.
Modular cables are connected to the control board.
See manual for PLS.
Unit with water heating
Connected via the built-in control board PLS with 1,5
m cord and plug.
Unit with electrical heating
The electrical installation is made on the top of the unit,
fig.2. Power supply for heating (400V3N~) are connec-
ted to terminal block in the internal connection boxes.
2-metre units require dual power supplies.
The largest cable diameter for the terminal block is 16
mm². The cable glands used must meet the protection
class requirements. In the distribution board it is to be
indicated that ”the air curtains can be supplied from
more than one connection”.
See wiring diagrams.
Start-up (E)
When the unit is used for the first time or after a long
period of disuse, smoke or odour may result from dust or
dirt that has collected on the element. This is completely
normal and disappears after a short time.
Connecting the water coil (W)
The installation must be carried out by an authorised
installer.
The water coil has copper tubes with aluminium louvers
and is suitable for connection to a closed water heating
system. The heating coil must not be connected to a
mains pressure water system or an open water system.
Note that the unit shall be preceded by a regulating
valve, see valve kits.
The water coil is connected on the upper side of the unit
with ø15 mm smooth copper pipe with a suitable coup-
ling or soldering. The connections to the heating coil
must be equipped with shut off valves (not included) to
allow problem free removal. Water coil is equipped with
a drain valve.
A vent valve should be connected at a high point in the
pipe system. Air valves are not included.
NOTE: Care must be taken when connecting the pipes.
Use a wrench or similar to hold the air curtain connec-
tions to prevent straining of the pipes and subsequent
water leakage during connection to water supply pipe-
work.
Adjustment of the air curtain and air flow
The direction and speed of the air flow should be ad-
justed considering the load on the opening. Pressure
forces affect the air stream and make it bend inwards
into the premises (when the premises are heated and the
outdoor air is cold).
The air stream should therefore be directed outwards to
withstand the load. Generally speaking, the higher the
load, the greater the angle that is needed.
Basic setting fan speed
The fan speed when the door is open is set using the
control. Note that the air flow direction and fan speed
may need fine adjustment depending on the loading of
the door.
Filter (W)
The water coil is protected against dirt and blockage by
an internal air filter which covers the coil face.
Type
Output
[kW]
Voltage
[V]
Minimum
area
*
[mm
2
]
AC25-10-E08
8
400V3N~
2,5
AC25-15-E12
12
400V3N~
4
AC25-20-E16
8
400V3N~
2,5
