Control Options - Schwank Select12 Series Manual

The largest cable diameter for the terminal block
is AWG6. 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.

Control options

Stepless airflow control with door contact/position
limit switch
When the door is closed the fan runs at low speed.
When the door opens, the fan runs at high speed,
set on the remote control or the control panel at
the gable end.
See Figure 2 and Accessories pages.
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 SchwankAir valve kit.
The water coil is connected on top of the unit
via steel pipes with valve (3/4'') terminals,
external thread. Flexible hoses are available as
accessories, see accessories pages.
The connections to the heating coil must be
equipped with shut off valves to allow trouble-free
removal. The 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 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.
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.
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. In environments where the filter
requires frequent cleaning, it is advisable to use
an external intake filter (see accessories pages),
which provides easier maintenance, since the unit
does not need to be opened. When an external
filter is used, the internal filter is removed.
Service, repairs and maintenance
For all service, repair and maintenance first carry
out the following:
1. Disconnect the power supply.
2. The front hatch is removed by removing the
screws on the top of the unit and then detach
the bent edge at the bottom. (Fig.3)
3. After the service, repair and maintenance
reattach the front hatch. Place the hatch at the
lower edge with the bent edge and fasten on
top with screws.
Note that when carrying out work where the end
is removed, the outlet grille also detaches.
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