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Unit with electrical heating
208V3~/480V3~/600V3~ power supply for heat
and control [*1 *2] should be connected to a
terminal block in the primary terminal box.
See Fig. 4.
Note! If you want to divide the output
between two connection points, the
series cabling must first be removed
[72" & 96" Electric Heated Models].
•
*1 480V3~/ 600V3~ Control supply is
transformed via internal transformer to 230V~
and routed through 2x 10A fuses in the primary
terminal box.
•
*2 208V3~ Control supply is connected
internally through 2x 10A fuses in the primary
terminal box.
The largest cable diameter for the terminal
block is 0.025 in². 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 [TE]
When the unit is used for the first time or after a
long period of non-use, smoke or an odour may
result from dust or dirt which has collected on the
element. This is completely normal and disappears
after a short time.
Connecting the water coil [TW]
The installation must be carried out by an
authorised installer.
The water coil has copper tubes with aluminium
fins 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 kit.
Adjustment of the air curtain and
airflow
The direction and speed of the airflow should be
adjusted considering the load on the opening.
Pressure forces affect the airstream and force it
inwards towards the premises [when the premises
are heated and the outdoor air is cold].
The airstream should, therefore, be directed
outwards to withstand the load. Generally
speaking, the higher the load, the greater the
angle required.
The connections to the heating coil must be
equipped with shut off valves to allow trouble-
free removal. Water coil is equipped with a drain
and a vent valve. The water coil is connected via
connections with dimensions DN20 [3/4’’], inside
thread, inside the unit. Knockouts are placed on
the top and the side of the unit.
Hoses are mounted via cable glands at knockouts
to protect the hose and prevent air leakage. Fig. 5
NOTE: Care must be taken when connecting the
pipes. Use a pipe wrench or a similar tool to grip
the air curtain connections to prevent straining of
the pipes and subsequent water leakage during
connection to the water supply pipe-work.
!
Basic setting fan speed
The fan speed when the door is open is set using
the control. Note that the airflow direction and the
fan speed may need fine adjustment depending
on the loading of the door.
Filter [TW]
The water coil is protected against dirt and
blockage by an internal air filter which covers the
coil face.
Service, repairs and maintenance
For all service, repair and maintenance first carry
out the following:
1. Disconnect the power supply.
2. The service hatch is opened by loosening the
snap fixings located on the bottom of the unit
[turn 90°]. See Fig. 3.
3. After service, repairs and maintenance close
the service hatch and make sure that the snap
fixings lock securely.