infrasave SchwankAir 3500 Series Installation, Operation And Maintenance Instructions page 40

Modular industrial air curtains for indoor use horizontal & vertical mount models
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Wiring
n
Note:
Take the following into account, otherwise errors
may occur:
The control cable between the control panel and
the (first) connected unit may have a maximum
length of 165 ft. (50 m).
Keep control cables away from electromagnetic
fields and interference sources such as high-
voltage cables and fluorescent light starters, for
example.
Lay the control cables out straight or roll them in
a bifilar coil by folding cables in half before rolling
them. As a result, the magnetic fields will cancel
each other out to an important extent.
n
Note:
Use supplied control cables only.
Standard modular telephone cable is NOT
suitable.
Multiple units operated from a single control panel
A maximum of 10 'Auto' units can be connected to
a single control panel. And with 'Auto' unit, 2 'Basic'
units. The units are thereby daisy chained.
The total length of the control cables between the
first and the last unit must not exceed 330 ft
[100m]. If the distance becomes greater an
additional control panel must be connected.
Only units from the same product series, with the
same battery type, and of the same capacity can be
applied in combination with a single control panel.
Configure any single unit as the master. The
sequence of the connected units is not important.
Connect the control panel and the external
control components to the master unit.
n
Note:
The master unit can be recognized by the
addition 'Auto' on the type designation on the
rating plate.
n
Note:
Do NOT remove the external control input
jumpers on the other units.
40

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