DALEMANS U-H1 User manual

Revision V1R0 •10/2020
Alarm Control unit for flammable gases
INSTRUCTION MANUAL

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Copyright ©2020 by DALEMANS s.a.
Revision V1R0 • 10/2020
Any reproduction, partial or full, of this document by means of
any process whatsoever without prior written consent from
DALEMANS s.a. is strictly prohibited.
Warning
All information contained in this document is non-contractual
and subject to change without notice.
We also encourage you to regularly check the availability
of a new version on our website: http://www.dalemans.com
Please contact your distributor in case of doubt,
Dalemans s.a.
Rue Jules Mélotte, 27 • B-4350 Remicourt (Belgium)
Tel. [phone] • Fax [phone]
Email: [e-mail]

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CONTENTS
1. GENERAL REMARKS ................................................................................. 5
1.1RESPONSIBILITIES –GUARANTEES ................................................... 5
1.2 SAFETY INFORMATION ............................................................ 6
1.3ENVIRONMENT ....................................................................................... 7
1.4U•H1 CONTROL UNIT ............................................................................. 7
2. INSTALLATION OF THE CONTROL UNIT........................................... 10
2.1 PRECAUTIONS FOR USE .................................................................... 10
2.2 PLACEMENT OF THE U•H1 CONTROL UNIT ..................................... 10
2.3 CONNECTING THE CONTROL UNIT ................................................... 11
2.4 CONNECTING THE DETECTOR ........................................................... 12
2.5POWER CONNECTION ......................................................................... 12
2.6 CONNECTING THE SIREN ................................................................... 13
2.7 CONNECTING THE RELAYS ............................................................... 13
3. INSTALLATION CONTROL ..................................................................... 14
4. INSTALLATION CONFIGURATION ....................................................... 14
4.1 FACTORY CONFIGURATION ............................................................... 14
4.2 GENERAL MENU .................................................................................. 15
System information..........................................................................................15
History .....................................................................................................16
Ages of the calibration parameters........................................................16
Date and time ..........................................................................................16
Configuration of the U•H1 control unit ..................................................17
• Basic standard configuration ................................................................... 17
• Alarm thresholds ..................................................................................... 18
• Relay failsafe mode configuration ........................................................... 18
• Reset mode for level 1 alarms ................................................................ 18
• “Siren” mode ............................................................................................ 18
• Behaviour of the external alarm .............................................................. 19
• Normal state of the external alarm .......................................................... 19
• Errors reset mode .................................................................................... 19

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Status of the system’s elements .................................................................. 20
System tests ................................................................................................. 21
4.3 SERVICE MODE .................................................................................... 21
Entering the password .................................................................................. 21
Service menus ............................................................................................... 22
Advanced system tests ....................................................................... 22
• Output tests ............................................................................................. 22
• Detector simulation ................................................................................. 23
Configuration of the measurement channel ....................................... 24
• Location of the detector............................................................................ 24
• Predefined locations................................................................................. 24
• Customised location ................................................................................ 25
• Putting the detector out of service............................................................ 25
Configuration of the external alarm .................................................... 26
• Behaviour of the external alarm .............................................................. 26
• Normal state of the external alarm .......................................................... 27
Maintenance management ............................................................................ 27
• Maintenance interval ............................................................................... 27
• Renewal of the validity of the calibration parameters ............................. 28
Initialization of the detector ............................................................................29
5. SPARE PARTS AND OPTIONS .............................................................. 30
6. TECHNICAL CHARACTERISTICS ........................................................ 31
6.1 General remarks..................................................................................... 31
6.2 Detectable gases.................................................................................... 31
6.3 Product characteristics ........................................................................ 32
7. ANNEXES ...................................................................................................... 33

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1. GENERAL REMARKS
1.1 RESPONSIBILITIES - GUARANTEES
The installer is required to respect standards and installation provisions.
The installation must be carried out by qualified personnel.
All our equipment is tested and inspected in our workshops before shipping.
This manual must be read carefully by anyone who is or will be responsible for the installation, use
and/or maintenance of this equipment. The guarantee offered by DALEMANS SA will be void if this
equipment is not installed, used and maintained in compliance with these instructions, warnings and
limits of use.
By following these instructions, you guarantee the proper working of the equipment. Please contact
DALEMANS SA for any information about the use or maintenance of this product.
ONLY use original DALEMANS SA parts when performing maintenance on the equipment as described
in this manual. Otherwise you may seriously alter the equipment’s performances.
Any repair or maintenance performed without respecting the procedures described in this manual or
without help from our after-sales service may prevent the equipment from working correctly and, as a
result, prevent guaranteeing the safety of the occupants of the building and installations.
This equipment must be installed indoor, in a clean and dry area. Please use a screen (box) to avoid
any projections of water of polluting agents. Don’t hesitate to contact DALEMANS SA for any additional
information concerning the use of maintenance of this product.
DALEMANS SA cannot be held responsible for any direct or indirect damage as well as any direct and
indirect monetary damages resulting from the failure to comply with these guidelines.
DALEMANS SA guarantees that the U•H1 control unit is free from manufacturing defects and agrees,
at its sole discretion, to repair or replace any component which is defective or likely to become so in the
context of normal use during the warranty period specified in the general terms of sale.
This guarantee does not cover elements such as fuses or any other component provided by a third
party.
Claims concerning the DALEMANS SA product guarantee must be made in the guarantee period
specified above and within 5 calendar days of the discovery of the problem. Please contact your
DALEMANS SA after-sales service to register your claim.
For any additional information, please refer to DALEMANS SA general conditions available on request.

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1.2 SAFETY INFORMATION
Symbol
Description
Protective ground terminal
Warning : risk of electric shock
Warning : refer to instruction manual
The following units are used throughout this document
Ah
Ampere-hour
VAC
Voltage with alternative current in volts
VDC
Voltage with continuous current in volts
mA
Current in milliampere
W
Power in watt
The installation and commissioning of U•H1 control unit must be performed by qualified personnel only.
This qualified personnel is trained and accredited by DALEMANS SA During installation, refer to the
standards in application.
Should the equipment be installed or used in a manner not specified by DALEMANS SA, the protection
provided by the equipment may be impaired.
Modification, disassembling and total or partial destruction of this equipment may invalidate the essential
safety requirements of the whole plant.
For commissioning, please contact DALEMANS SA to arrange an appointment.
Do not open the equipment without disconnecting mains power supply first

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1.3 ENVIRONMENT
The presence of the crossed-out wheelie bin logo on this product means that you are
required to respect the regulations in force concerning the collection and recycling of
electrical and electronic waste.
These provisions aim to preserve the natural resources used to produce this product
and to avoid the dispersal of substances which are potentially harmful to the
environment and human health.
Once this product reaches the end of its life, you MUST discard it by taking it to an approved collection
centre for the recycling of electrical and electronic equipment.
For more information on collection and recycling centres in your region, please contact your local or
regional administration.
1.4 U•H1 CONTROL UNIT
General information
The U•H1 control unit is a fixed automatic alarm management device linked to explosive gas
detection. The 3F+ detector is a fixed device that permanently transmits to the U•H1 control unit a signal
proportional to the gas concentration detected in the air.
Before the LEL
1
for the gas observed is reached in the atmosphere, this electronic control unit can act
on safety equipment such as:
•the closure of a gas valve,
•the cut-off of the electrical current,
•the triggering of an alarm,
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 signalling the technical fault. This
function guarantees the reliability of the gas detection.
1
LEL: Lower explosive limit: the concentration from which an air/gas mix becomes dangerous.
Danger zone
Detector
Zone may be
dangerous
Valve
Gas stop
Siren
Flashing light
Non-danger zone
U•H1
control unit
3F+
! It is strongly
recommended to place
the control unit outside
the zone being protected !

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Finally, all or part of the alarms can be notified to an external piece of equipment, such as a central
technical management system, by an action on an additional alarm relay.
At any moment, the status of the control unit and the triggering of each of the functions presented may
be observed visually through the elements on its front:
•A display with a backlight that varies based on the status of the U•H1 control unit and
providing an explanation of this status.
•A set of colour LEDs providing more specific information on these functions.
•An audible buzzer, which can be reset, is activated in the event of an alarm or by error
function.
Display interface
LED
LED indicators
“Power” LED
The control unit is supplied by the main power.
“Fault” LED
Presence of a technical fault connected to the fault
relay or not.
“Inhibit” LED
The control unit is in a particular operating mode:
The measurement of the gas concentrations and the
alarm management still takes place, but the status
of the alarm relay is unchanged. This mode
spontaneously stops after 15 minutes of
inactivity.
Keypad
LED Indicators
Display

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Display
The current status of the U•H1 control unit is indicated by information messages on the display and a
coloured backlight.
When an alarm is present, only alarm messages are displayed. Any messages associated with a
technical fault is no longer present.
Keypad
Allows movement within a menu or within a selection
Allows entry to a sub menu or to the action associated with the selected menu item
Allows exiting a sub menu and return to the parent menu
ENTER
Allows entry in configuration mode, confirmation of a parameter change or starting the
action associated with the selected menu item
ESC
Allows exiting the configuration menu completely or to abandon the current parameter
change and return to the parent menu
RESET 1 x
Allows turning the audible alarm and the transistor output off (potentially connected to
an alarm)
RESET 2 x
Allows:
--resetting an alarm if the gas concentration returns below the threshold which
triggers it.
--resetting the errors still indicated but no longer ongoing.
Backlighting
Off
Green
Yellow
Red
Mode
Sleep
No alarm
Maintenance
Alarm
Message
Cyclical display:
•“No Alarm” to report the
absence of an alarm.
•Maintenance date:
“Next maintenance”
•Gas concentrations values
(LEL percentage) observed
by the detector.
Maintenance date if exceeded:
“Maintenance needed “.
Cyclical display of alarms:
•List of level-1 alarms if
no level 2 alarm
“Gas presence”
•List of level 2 alarms
“Gas alarm”
Technical fault
Cyclical display:
•List of errors and
technical fault
Note:
The display’s backlighting goes into sleep mode after 60 seconds. As soon as the keypad is used,
as soon as an alarm is detected or as soon as a technical fault appears, the U•H1 control unit goes
out after sleep mode.

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2. INSTALLATION OF THE CONTROL UNIT
2.1 PRECAUTIONS FOR USE
For your safety, before undertaking any action, always make sure that the equipment is disconnected
from mains power supply.
The U•H1 control unit’s enclosure can only be opened by qualified personnel.
The U•H1 control unit must be placed in a room without any explosive atmosphere and within easy
reach.
As the U•H1 control unit’s enclosure is reversible, it may be set up to receive electrical cables from the
top or bottom. To guarantee optimal sealing, cables should be received from the bottom.
The equipment must be placed in a dry and clean environment.
A set of holes are provided in the enclosure. To install the cable glands, it is necessary to remove the
machined parts from these holes using a flat-head screwdriver and a mallet.
Important note:
Never place the U•H1 control unit, the alarm and the cable for the detector in the vicinity of :
-a high-voltage cable or a power cable,
-coaxial cable or transmitter,
-welding station or frequency regulator.
2.2 PLACEMENT OF THE U•H1 CONTROL UNIT
The U•H1 control unit must be attached to a clean and damp-free wall. Two attachment systems, a
drilling diagram and a quick installation guide are provided with the equipment. You can opt for
attachment via the enclosure or via the 4 fixing feets provided.
Optionally, it is also possible to attach the U•H1 control unit to a DIN rail. Please contact your
DALEMANS SA representative for more information.
If the attachment method without feet is chosen, attach the enclosure using the 4 holes located in the
corners of the enclosure using a PZ2 screwdriver with a minimum length of 150 mm.
For the different stages, refer to the quick installation guide provided in the packaging.
Before drilling these holes using a tool, it is recommended to remove the
electronic part to avoid any accidental damage.