Multi
MAXX
HD
Commissioning
PR-2007-0350-GB • Subject to modifications • R2-04/2016
39
10.8 Functional possibilities
10.8.1 Fan mode
The behaviour of the fan control depends on the configured control type and operation
mode on the selected control panel. The following fan modes can be set:
– Manual fan control
– Automatic fan control
– Automatic fan control in “mute” mode
The fan switches off irrespective of the selected mode if one of the following error sta-
tuses has occurred:
– Thermal motor monitoring tripped
– Insufficient operating data due to sensor error
– Defective hardware
Manual
The fan is operated at the pre-set fan speed. The fan speed can be pre-set via the con-
trol panel, the management system or via external modules (e.g. MATRIX.DI digital
input module).
Automatic
The fan is activated according to the setpoint deviation (temperature).
In “mute” mode, the highest fan speed is blocked.
The fan speeds are controlled according to the deviation between actual and setpoint
values. Both the size and the time of the existing deviation affect the control behaviour.
The number of the available fan speeds depends on the unit type.
Parameter:
– Speed number: 0 ... 3 - speed stage fan
– Speed number: 0 ... 5 - speed stage fan
(only MATRIX 4000)
Fast ventilation
(only mixed air units)
This function enables to ventilate the room with fresh air for a limited period of time.
This function is available only in connection with control panel MATRIX OP50 or
MATRIX OP51.
Air change function
This function enables the fan to operate irrespective of the selected control mode and
to remain switched on even if the setpoint temperature has been reached. The fan
speed must be selected manually in this case. This is intended to provide an optimum
air change in the room. This function can only be selected using the MATRIX OP50
and MATRIX OP51 control panel or the MATRIX.PC service software.
[%]
100
Switch difference
1
2
3
Off.
Fan sta
ges
