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Operation
The unit must extend or overlap to the entire width of
the door opening to create the most effective seal.
The unit's door opening is shielded, and heat loss is
reduced by air being pulled in through the air
curtain's grille at the top or front of the air curtain
and blown out through the unit's opening creating
a barrier. Keep obstructions out of the air stream to
maintain optimum performance. The air blown
through the opening can be directed using the
adjustable nozzle at the opening.
The air temperature, the pressure differential across
the entryway, and any wind load all affect how
effective the air curtain is If the building has negative
air pressure, the air curtain will not operate effectively.
In these circumstances, a mechanism of supplying
makeup air to the building is necessary to maintain
equal air pressure on both sides of the entrance.
Electrical installation
The installation, which should be preceded by an
isolator switch with a contact separation and should
only be wired by a licensed electrician and in
accordance with NEC and the local electrical
codes and regulations. The control system is
pre-installed in the air curtain with an integrated PLC
(see Fig. 2).
The controller is supplied pre-programmed
with quick-fit connections. Modular cables are
connected to the control board. See manual for
controller.
Unit with electrical heating
For 208V3~ power, the electrical connection is made
at the panel mounted main disconnect. See Fig.2.
For 480V3~/600V3~ power supply for heat is provided
on the 3-way Terminal block. The motors/control
power is connected to a 2-way terminal block from
208V2~, supplied by either a 600/480V stepdown
transformer or from the building main electrical panel.
Note! If you want to divide the
output between two connection
!
points, the series cabling must first
be removed (72" & 96" Electric
Heated, 2x480V3~/600V3~).
■
480V3~/ 600V3~ Control supply is transformed
via external transformer to 208V~ and routed
to the Air Curtain
208V3~ Control supply is connected internally
■
through 2x 25A.
The largest cable diameter for the disconnect switc
is 4 core, #2 AWG each. The cable glands used
must meet the protection class requirements. In the
distribution board it is indicated that" the air curtains
can be supplied from more than one connection."
See wiring diagrams.
Start-up (VE)
When the unit is used for the first time or after an
extended period of non-use, smoke or an odor
may result from dust or dirt which has collected on
the element. This is completely normal and
disappears after a brief time.
Adjustment of the nozzle
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. The higher the load,
the greater the angle required.
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 (VW)
Optional Metal Washable filters are available with
both Heated and Ambient units.
Service, repairs, and maintenance for all service,
repair and maintenance first carry out the following:
1. Turn off the disconnect Switch
2. Disconnect the power supply.
3. Open the front shields by removing the screws
to access the electronics
4. After service, repairs and maintenance fasten the
service hatch and the front.
schwankgroup.com/schwankair
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