Hochiki RHD-E-AS Instruction Manual
RHD-E-AS
GENERAL DESCRIPTION
The wireless heat detector samples the temperature in the protected area to provide the earliest warning of fire and yet offers a high
level of false alarm rejection. An alarm condition is determined when the level of temperature or the thermal variation versus time
exceeds the alarm threshold; consequently an alarm message is sent to the control panel through its wire to wireless translator
module and, eventually, one or more wireless expander modules.
Communication between the detector and the translator / expander modules is wireless, via the „Sagittarius‟ bidirectional protocol.
PARTS OF THE PRODUCT
DETECTOR VISUAL LED INDICATOR
The wireless heat detector is equipped with a bicolour LED (red / green)
that provides visual indication for functional conditions and battery levels
as indicated in table 1.
DEVICE’S POWER SUPPLY AND LINKING
The linking operation permits the configuration of the wireless heat
detector on the translator module.
The linking operation described below does not change if made directly
from the translator module or from the PC configuration program; please,
refer also to the “Guide to wireless system installation” and similar
documentation.
1) Verify that the secondary battery is present; if not, insert the battery
into its housing with the positive pole facing up (Picture 2).
2) Move the switch to position „ON‟ (Picture 3).
3) Insert the main battery (Picture 4).
Ensure that battery polarity is correct.
The visual LED indicator switches green once, then four times red
(programming mode) and will, successively, turn off. This
indicates that the detector is ready to be linked to the translator
module.
4) Move the switch in position „1‟ to trigger the
communication between the detector and the translator.
The green LED switches on once, then it blinks many times
(operating mode), successively the red LED blinks many times (self adjustment mode) and, finally, after alternating green-red for one
second, the indicator turns off: this indicates that the linking
procedure has been performed correctly and the detector has
programmed itself. The detector is linked and all the parameters (address, system code etc.) necessary to work correctly are
stored. If the LED remains switched on the red light it means that the linking operation failed. In this case remove the main battery,
switch alternatively the ‘ON’ / ‘1’ switch a few times in order to discharge the internal capacitor and then start again from point 2).
WIRELESS HEAT DETECTOR
Status description LED indicator signal
Switching into “operating
mode”; occurs after main
battery insertion.
Switching into “programming
mode”; occurs immediately
after the linking phase is
started.
“Self-adjustment” mode;
occurs during the linking
phase: device is programming
itself with the wireless system
parameters.
Normal active mode or device
unpowered
Alarm condition
Main battery fault (low level)
Secondary battery fault (low
level)
Both batteries fault
Tamper fault No signal from LED
Other fault type (fault on the
optical analysis path, high
level of contamination inside
the optical chamber...)
1. Detector
2. Mounting base
3. Bicolour LED
4. Link - Program switch
5. Tamper switch
6. Batteries housing
7. Secondary battery
8. Main battery
9. Battery cover
Picture 1
Table 1
4 short red LED blinks.
Green LED Short blinks.
Red LED blinking: 1 second
on and 0.1 second off.
No signal from LED.
Red LED blinking: 0.5 second
on and 0.5 second off.
Orange blinking: 0.1 second
on and 5 seconds off.
Green LED blinking: 0.1
second on and 5 seconds off.
Sequential orange-green LED
blinking: 0.1 second on and 5
seconds off.
Sequential orange-green LED
blinking: 0.5 second each
colour.
IMPORTANT NOTE! Programming is considered to be completed successfully only if there is an indication of programming
success on the detector and on the translator or on the window of the PC configuration program.
5) Put on the battery cover.
COMMUNICATION QUALITY ASSESSMENT
It is possible to assess the wireless communication quality of the sensor by using a testing feature built in the device.
After a successful linking operation, by moving the Link-Programming switch on the „ON‟ position, the sensor‟s indicator will start
blinking according to table 2.
Always remember to reposition the switch to ‘1’ after the assessment operation: device will NOT work operatively while the
switch is on the ‘ON’ position.
Secondary battery housing
Picture 2 - Secondary battery housing
Picture 3 - Link - Program switch
Secondary battery
Main battery
Picture 4 - Main battery
Communication quality Assessment Device’s indication
No communication Fail Two red blinks
Communication quality: 0 dB - 10 dB (Mark 2) Poor One red blink
Communication quality: 10 dB - 20 dB (Mark 3) Medium-low One green blink
Communication quality: 20 dB - 30 dB (Mark 4) Good Two green blinks
Communication quality: > 30 dB (Mark 5) Excellent Two green blinks
DETECTOR PLACEMENT
For specific information regarding detector spacing, placement and special applications refer to your specific national standards.
It is strongly advised to mount the device as far as possible from metal objects, metal doors, metal window openings, etc. as well as
cable conductors, cables (especially from computers), otherwise the operating distance may greatly drop. The device should not be
installed near electronic devices and computer equipment that can interfere with the reception quality.
1) Select the position of the detector before installing and fixing its supporting base. Verify, from that position, that the
communication between the detector and the translator or the expander is correctly established and working (see the
COMMUNICATION QUALITY ASSESSMENT paragraph).
2) Install and fix the base, in the selected position, with the screws provided (Picture 5 and Picture 6).
3) Insert the detector onto the base (Picture 5).
4) Carry out a test of the device to meet local regulations.
Table 2
Picture 5 - Detector placement
HOCHIKI EUROPE (UK) LTD, Grosvenor Road - Gillingham Business Park - Gillingham -
Kent ME8 0SA - U.K.
www.hochikieurope.com
L20-SG350-6100 (v1.1)
WIRELESS DETECTOR ANTI-TAMPER BLOCK AND REMOVAL
The base for the wireless heat detector has a special anti-tamper device block. To lock the sensing device onto the base, cut off the
small plastic lug on the plastic blocking grip on the detector base (Picture 6).
To remove the blocked detector from the base, insert a tool, like a small screwdriver, into the hole and remove the detector
(Picture 7).
Detector block. Remove the small
plastic lug on the plastic blocking grip,
to allow the block of the detector
Picture 6 - Detector block and holes for the screws
TESTING
Detectors should be tested after installation and during periodic maintenance visits.
Detectors can be tested as follows:
Magnet test
The wireless optical smoke detector has been designed to permit a magnetic functional test. To perform the magnetic test put and
hold the magnet near the surface of the indicated area (Picture 8).
Heat test
Use a hair dryer of 1000-1500 W or an heat tool from an approved manufacturer. Direct the heat towards the sensor from its side.
Hold the heat source at about 15 cm away from the sensor in order to prevent damage to its cover during testing.
When this test is performed:
1) The detector must enter into alarm condition, activating the central LED indicator (blink red as per Table 1).
2) Transmit the fire alarm message to the control panel via translator / expander.
3) An alarm condition on the control panel should be triggered.
If the detector does not respond to the test correctly it may be necessary to clean it: in this case follow the instructions indicated in the
“MAINTENANCE” paragraph.
If testing fails again after maintenance then replace the detector with a new one and return the faulty one for servicing.
After every test, the detector must be reset by the specific command on the control panel (see the RESET paragraph).
RESET
To reset the detector from alarm or fault condition it is necessary to send the reset
command from the control panel.
TAMPER DETECTION FEATURE
The wireless heat detector is provided with a tamper switch and, in case of removal of the detector from its base, it sends a tamper
detection message to the control panel (Picture 9).
MAINTENANCE
1) Before starting any maintenance work, isolate and disable the system, in order to avoid accidental and unwanted alarm
conditions.
2) Remove the detector from its mounting base to allow inspection and servicing at ground level and in good light.
Inspect the thermistor area: use a small, soft bristle brush to dislodge any obvious contaminants such as insects, spider webs,
hairs, etc.
3) Use a small vacuum tube or dry, clean, compressed air to suck up or blow any remaining small particles away from the thermistor.
4) Wipe the exterior housing of the detector with a clean, damp, lint-free cloth to remove any surface film that can later
attract airborne contaminants.
HOCHIKI EUROPE (UK) LTD, Grosvenor Road - Gillingham Business Park - Gillingham -
Kent ME8 0SA - U.K.
Tool to remove the
blocked detector
Hole to unblock the detector
Picture 7 - Detector block removal
60 mm
Picture 8 - Magnetic test area:
correct position for magnet test
Holes to screw the base onto the wall
Picture 9 - Tamper switch
www.hochikieurope.com
5) After all detectors have been inspected and serviced, reinstall them in their mounting bases, re-apply power to the system and
check correct operation as described under the TESTING paragraph.
FAULT SELF-TEST
The wireless heat detector periodically performs a self-test and, if a fault condition is detected, a fault message is sent to the control
panel via translator / expander.
The fault condition is locally signaled by the visual LED indicator located at the center of the detector (see Table 1).
A fault condition is determined by:
a) Fault on the thermal electronic circuit, etc.
b) Low batteries level.
TECHNICAL SPECIFICATIONS
Communication range with the
translator or expander
Operating frequency 916 MHz
Modulation type FSK
Operating frequency channels 6
Radiated power 5 dBm (3 mW) Typical
Transmission message period 60 sec Default
Main battery *
Secondary battery *
Dimensions 110 mm x 65 mm
Weight 130 g
IP rating 21C
Max tolerated humidity
(no condensing)
Operating temperature range From –10 °C to +55 °C
Required programming software
Minimum required Vega interface
firmware version for the translator
* When a low battery condition is indicated, both, main and secondary, batteries must be
changed altogether.
IMPORTANT! - THERMAL ALARM THRESHOLD SETTING
Thermal alarm threshold setting can be programmed ONLY THROUGH THE PC’S WIRELEX CONFIGURATION PROGRAM AND
ONLY DURING WIRELESS SYSTEM CONFIGURATION; IT CANNOT BE CHANGED AFTER!
Thresholds level characteristics are illustrated in table 4 (default is A1R).
WARNINGS AND LIMITATIONS
Our devices use high quality electronic components and plastic materials that are highly resistant to
environmental deterioration. However, after 10 years of continuous operation, it is advisable to
replace the devices in order to minimize the risk of reduced performance caused by external factors. Ensure that this device is only used with compatible control panels. Detection systems must be
checked, serviced and maintained on a regular basis to confirm correct operation. Smoke sensors
may respond differently to various kinds of smoke particles, thus application advice should be
sought for special risks. Sensors cannot respond correctly if barriers exist between them and the
fire location and may be affected by special environmental conditions. Refer to and follow national
codes of practice and other internationally recognized fire engineering standards. Appropriate risk
assessment should be carried out initially to determine correct design criteria and updated periodically.
WARRANTY
All devices are supplied with the benefit of a limited 3 year warranty relating to faulty materials or manufacturing defects, effective
from the production date indicated on each product. This warranty is invalidated by mechanical or electrical damage caused in the
field by incorrect handling or usage. Product must be returned via your authorized supplier for repair or replacement together with
full information on any problem identified. Full details on our warranty and product‟s returns policy can be obtained upon request.
The warranty does not cover the provided batteries.
100 m Open space
Type CR123A (3 Vdc) 5 years typical
Type CR2032А (3 Vdc) 2 months typical
95% RH
“Wirelex-Fire” revision
5.1.3 and successive
FW v2.01 For magnet test
Including adaptor wall
base
Including adaptor wall
base
Table 3
Threshold levels Value
Fixed 58 °C
A1R (rate of rise) 58 °C
High temperature 78 °C
Table 4 - Thermal alarm thresholds
SAI Global
Lic SMK40120
Lic SMK40119
AS7240.5-2004
AS4428.9-2006
Class A1R
ABN 67 153 750 648
L20-SG350-6100 (v1.1)
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