ZIEHL-ABEGG Fcontrol FTET4AHMQ-L, Руководство по эксплуатации

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7.13.7 Temperature monitoring by distance alarms (relative to nominal value)
The temperature can be monitored to absolute values or alternatively to relative values in relation to
the currently active nominal value (distance alarm).
Distance alarm
Distance alarm
OFF = temperature monitoring to absolute values (at factory)
ON = temperature monitoring to relative values in relation to the currently active
nominal value (distance alarm).
Automatic nominal value changes which can result from the
“ automatic reduction ” and
“ growth curves ” functions are considered.
Settings of the alarm limits Setting of the temperature monitoring “ Alarm Minimum ”
and “ Alarm Maximum ” .
7.14
|
Installation
|
Measuring fan
◄
Measuring fan
↑
|
ESC
|
P
↓
7.14.1 General description of function
The menu group
“ Measuring fan ” only appears when the
|
4D
|
function was programmed for
digital input D1 in the IO Setup.
A measuring fan serves to determine the actually conveyed amount of air in the exhaust air chimney.
The regulator measures the speed of the measuring fan and calculates the volume
fl ow with the data
of the measuring fan.
The measuring fan must have a pulse output (NPN, open collector) and is connected to the regulator
at the digital input
“ D1 ” , to supply power to the measuring fan the regulator provides a “ 24 V ” voltage.
The number of pulses per revolution is entered in the regulator so that all the preconditions for the
speed measurement are satis
fi ed.
The speed is converted into a volume fl ow based on a reference speed and the corresponding
reference volume fl ow which are entered in the regulator. These data are to be taken from the
measuring fan manufacturer ’ s speci fi cations. Generally the measuring fan has a linear characteristic
so it suf fi ces to enter a reference point which is usually the maximum value.
Another speci fi cation is necessary. This refers to the necessary volume fl ow in the system at “ 100 % ”
ventilation. With this speci fi cation the ventilation computer calculates the absolute setpoint fort he
volume current based on the temperature difference, minimum air percentages and other in fl uences
by the upstream ventilation control functions in the stall. This setpoint is compared with the measured
volume
fl ow and deviations are compensated by changing the speed of the fan or throttling with a
shutter whereby the necessary volume fl ow is always set.
An error message is output if the measuring fan fails (no pulses to the ventilation computer for approx.
10 minutes). The device operates temperature-dependently as for operation without a measuring fan.
D1
24V
L+
Out
L-
D1
(GND)
24.05.2011
v_messv_cte_pte_fte.VSD
MV
CTE / PTE..
D1
D1
(GND)
FTET...
MV Measuring fan with NPN Impulse output
Operating Instructions Fcontrol – model series FTET4/6/10AHMQ-L The Installation menu
L-BAL-E139-GB 2022/03 Index 006 Part.-No.
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