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1.4 Device targeted by the document
This document has been redacted specifically for U•H1 gas detection control unit (reference
01253) in its V2 version. The version of the associated firmware is v3.03.
Device
CENTRAL U•H1
For all information on the installation, use and configuration of a U•H1 in V1 version, please
refer to the U•H1 instruction manual in its V1 version.
1.5 Operating principle
The U•H1 is a fixed device for automatic alarm management related to explosive gas
detection. The D-TEX 3F+ detector is a fixed device that continuously transmits a signal to
the U•H1 control unit proportional to the concentration of gas detected in the air.
1
Before the LEL
of the observed gas is reached in the atmosphere, this electronic control
unit has the possibility to act on safety equipment such as:
▪
the closure of a gas valve,
▪
the cut-off of the electrical current,
▪
the triggering of an alarm.
It is strongly recommended to place the control unit outside the zone being protected!
Non-hazardous area
It is strongly recommended to place the control unit outside the zone being protected!
Two adjustable alarm thresholds are respectively associated with the actions on the relays.
These are relays controlling the safety equipment connected thereto.
A U•H1 control unit output specifically adapted for the connection of a sounder, or a flash
lamp is automatically activated in case of alarm. At any time, it may be reset from the U•H1
control unit. The U•H1 control unit also has internal fault management. Once detected, any
abnormal operation of a detector or the control unit is indicated by an action on the relay
signaling the technical fault. This function guarantees the reliability of gas detection.
1
LEL: Lower explosive limit: the concentration from which an air/gas mix becomes hazardous.
DALEMANS sa/nv
Rue Jules Mélotte 27A
B-4350 Remicourt
+32 19 33 99 43
Reference
Device version
00410
Hazardous area
U•H1 Instruction Manual
7
|
50
Firmware version
V2R0
v2.02
Hazardous area
Certified
ISO9001 • VCA
www.dalemans.com
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