Bühler technologies FF Série Notice De Montage page 12

FF-xx
NOTICE! When using a detector without broken wire-de-
tection, the broken wire alarm is not used. The relay con-
tact may then be used to look for power supply failure.
When installing the FF-3-N or FF-40 detector, both relays are
used. A power supply failure may be seen by combining both
alarm outputs with an AND function since in working condi-
tion EITHER moisture alarm OR broken wire alarm is given.
4.2.2 Controller type FF-HM
Note the drawing 41/073-01-4 and 41/074-01-4.
On the upper terminal are the connections for power supply
and alarm relay outputs, on the lower terminal the moisture
detector and the external reset switch are connected.
The type FF-HM-230 is suitable for 230 V AC and 115 V AC. The
jumpers are factory set to 230 V AC. To change it to 115 V AC
disconnect the jumper between terminals 9-10 and set jump-
ers to terminals 8-9 and 10-11. The power supply is connected
to terminals 12-13 (PE is 7).
The type FF-HM-24 is only suitable for 24 V DC. The power sup-
ply is connected to terminals 12-13. NOTICE! Even with this
controller, PE has always to be connected to terminal 7!
Connecting the moisture detector:
The detector FF-40 is connected to terminals 25-26, the shield
to 24.
Connect the cable to the FF-3-N. Root strands white and brown
to terminals 25-26, and shielding to terminal 24.
When using models FF-3-N and FF-40, terminals 22 and 23 stay
open to ensure broken wire detection.
When using older models (FF-1), a jumper must be set
between terminals 22 and 23.
Hold function:
To enable this function, a jumper has to be set between ter-
minals 20 and 21. An external reset switch or contact may be
connected to terminals 14 and 15. The shield of this wire is con-
nected to terminal 16.
NOTICE
To prevent malfunction, the wires to the reset switch have to
be shielded!
4.2.3 Controller type FF-..-U
Note the drawing 41/065-07-4.
After opening the housing you will see the switch for the
voltage adjustment next to the fuses, which must first be set
to your voltage.
The power supply is connected directly next to the switch
(refer to board labelling).
The moisture detector for protective elements FF-3-U-2 and
FF-1-U attach to the 5-pin terminal X3 with the white and
brown conductors according to the connection diagram. On
protective element type FF-3-U the moisture detector attaches
to the 3-pin terminal X3. Connect the shielding with care.
12 Bühler Technologies GmbH
The signal relay for Type FF-3-U and FF-1-U connect to the 6-
pin terminal above the switch, on Type FF-3-U-2 they connect
to a 12-pin terminal. Please also refer to the connection plans
FF-U in the appendix.
Please be sure to sufficiently tighten the screw connections.
NOTICE! With these types both output relays will trigger
in the event of a cable break, so also that of the moisture
alarm.
5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
It might be necessary to adjust the position of the humidity
sensor in strongly fluctuating ambient or component temper-
atures in order to ensure the necessary tightness in the sys-
tem.
5.1 Adjusting the sensitivity
NOTICE
If the moisture detector controller works in combination with
a sample gas cooler, please wait for at least 5 minutes until
the cooler has reached its working temperature.
At the moisture detector controllers FF-HM 230 (24), FF-19 and
ER-145/A/Ex sensitivity is reduced by turning the poten-
tiometer counter clockwise. Turn until the alarm turns off.
(We recommend disabling the hold function during adjust-
ment. Otherwise the reset switch has to be pressed during the
whole procedure).
At the FF-..-U the setting of sensitivity is quite the same. But
first the enclosure must be opened. The potentiometer is on
the upper right, next to the terminal block for the moisture
detector.
The FF-3-U-2 has for the second moisture detector a Poten-
tiometer on the upper left.
When switching on the power supply the alarm may happen
to come on. This has to be taken into account for the design of
the whole system's control. No other settings need to be done.
6 Maintenance
Always observe the applicable safety- and operating regula-
tions when performing any type of maintenance. Please refer
to the original operator's manual on the included CD or online
at www.buehler-technologies.com for maintenance informa-
tion.
7 Service and Repair
Please refer to the original operator's manual on the included
CD or online at www.buehler-technologies.com for a detailed
description of the unit including information on
troubleshooting and repair.
BX410002 ◦ 02/2021