DencoHappel MATRIX OP21C Operation Manual page 79

MATRIX control panel
Example range start/range
Filter constant
120.5
K-factor
490
7.21.7 Submenu: Service
Service
Sensor offset value
Versions Info
Change password
PR-2011-0110-GB • Subject to modifications • R9-03-2016
The supply-air fan speed and supply-air volume can be changed using an exter-
end: nal 0-10V signal. The following settings are selected:
– Use: Speed setpoint over 0-10V
– Range start: 30%
– Range end 150%
Since the input type for the use "Speed reference value" is automatically set to 0-
10V, it does not need to be specified.
On the one hand, this setting results in the minimum air volume (0% of maximum
fan speed) conveyed at input signal as high as 30V. On the other hand, with the
configured range end of 150%, the maximum fan speed is already achieved with
an input signal of 5.83V = (10V / (range end [%] - range start [%]) ) * (100% range
start [%]). This can be used in combination with a CO2 sensor in order to operate
the air handling unit at full capacity starting from a certain CO2 indoor concentra-
tion and using the output sensor signal below 10 V.
Sensor inputs ➜ Filter constant
If one of the following points is selected in the submenu "Use"
– Measuring duct pressure
sec
– Measuring volume flow
– Volume flow measuring via pressure sensor
the needed filter time constant can be selected for the PT1 filter of the sensor
input in the "filter constant" submenu. The submenu "filter constant" is not dis-
played for other uses.
Value range:
Sensor inputs ➜ K-factor
If the volume flow measuring by pressure sensor was selected in the "Use" sub-
menu, the K-factor for the relevant fan must be entered in the "K-factor" submenu
to determine the volume flow. This setting is necessary, otherwise the function of
volume flow control is disabled.The K-factors of supply-air and/or extract-air fans
are available in the technical data and documentation for fans or air handling
units, or printed directly on the fans.
Value range:
Entries and queries are made in the "Version info" Submenu:
– Entry of the sensor offset value
– Version information: provides information about THE versions of the MATRIX
control panel
– Change password
[speed setpoint]
10 to 150 seconds
Adjustable steps: 0.1 seconds
Factory setting: 25 seconds
0 to 10,000 (m³/h) / sqrt(Pa)
adjustable steps: 1 (m³/h) / sqrt(Pa)
Factory setting: 0 (m³/h) / sqrt(Pa)
Operating MATRIX control panel
79