Biddle NOZ2 25, Manual

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I
NSTALLATION
A
IR HEATER
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2.7.2 The water-side control (accessory)
The unit is equipped with a water-side control. This regulates
the water supply to the heat exchanger, so that a constant dis-
charge temperature is achieved. The control can also be used
to limit the discharge temperature. The maximum permitted
discharge temperature is indicated in
1.3.5 Field of application .
For models with automatic CHIPS control, this limitation is
automatically set.
Note:
n
In an assembly with automatic CHIPS control, the
water-side control valve is automatically closed by
default if the unit and/or the heating is switched off.
Special points regarding the water-side control
Biddle supplies water-side controls for models with automatic
CHIPS control.
Caution:
c
A maximum of 5 units having a control valve can be
connected in series per control circuit board.
Consult Biddle if you want to connect more control
valves in an assembly with a single control circuit
board.
Control valves that are not supplied by Biddle must, in any case,
comply with the following:
• 24V power supply.
• 0-10V control.
• The total power consumption of the water-side controls
that are connected to 1 control circuit board may be a
maximum of 7.6 VA.
Connecting the water-side control
For models with automatic CHIPS control:
1. Connect the control valve and the drive to the heat
exchanger, in accordance with the diagram. In doing so, fol-
low the instructions given in the control valve manual.
Note:
n
Ensure that the axis of the valve is in the correct
position when connecting the drive. See the control
valve manual.