HK-21NZ HEAT ALARM INSTALLATION INSTRUCTIONS
Thank you for buying a Sentech heat alarm. Please read all instructions before
installing the heat alarm, so it will protect your home in the best possible way.
• If you are installing the heat alarm for some other person, leave these
instructions or a copy of them with him/her.
• If there is any question as to the cause of the alarm, always assume that this is
an actual fire and follow your fire emergency plans.
1: OPERATION AND TESTING
Normal mode: The red light flashes once every 55 seconds.
Alarm mode: When the alarm detects high temperature the red light flashes twice
every second and the buzzer beeps continually. The heat alarm will automatically
return to normal mode when the temperature drops back below the trigger point.
Test mode: Press the test button for more than two(2) seconds and the heat alarm
will go into test mode. Release the button for the alarm to stop and the heat alarm
will revert to normal mode.
Silence mode: During alarm mode, press the test button for 1 second to silence
the beep.
When the test button is released, the red light flashes once every 14 seconds,
indicating the device has begun an 11 - minute silence mode - the silence mode
can’t be cancelled by pressing the button.
The heat alarm will go into alarm mode again when the temperature is high than
75°C.
Low battery: When the battery is used up, the heat alarm will beep twice at
intervals of 28 seconds - please replace the heat alarm with new Sentech heat
alarm.
You can silence the beep by pressing the test button - whilst the button is
pressed, the red LED will stay on and the beep sounds frequently (5 beeps per
second).
When you release the test button, the ‘beep’ prompt is silenced for 8 hours and
the red light flashes once every 8 minutes - the test button is invalid during this
low battery silence mode.
At the end of the 8 hours, the audible indication will resume if the low battery
condition still exists.
The alarm will resume if the heat alarm detect the battery voltage has resumed to
normal battery power.
2. POSITIONING THE HEAT ALARM
For best protection the heat alarm should always be installed as part of a
complete fire protection system that also includes smoke alarms.
Heat alarms are best suited to areas where dust, fumes and moisture can cause
nuisance in smoke alarms, such as:
• Boiler rooms
• Kitchens
• Lofts
• Laundry rooms
• Garages
• Bathrooms
Heat alarms should not be installed in escape routes instead of smoke alarms
- they should only be used in the above applications. (Sentech smoke alarms
should be installed in Living rooms, hallways, stairwells and in every other room in
the house.)
When heat alarms are installed in a room, they should be placed on the ceiling,
ideally in the centre of the room. They should be at a distance no more than 5.3m
from the farthest wall, no more than 5.3m from a door to any room in which a fire
might start, and no more than 5.3m from the next heat alarm.
NOTE: HEAT ALARMS SHOULD NOT BE WALL MOUNTED.
Install sufficient heat alarms to compensate for closed doors and obstacles which
may interfere with the path of heat to an alarm and may prevent occupants from
hearing an alarm.
3. MAINTENANCE
Battery life: The heat alarm contains a 3V lithium battery (CR123A). The lifetime is
10 years.
When the battery is used up, the heat alarm will beep twice at intervals of 28
seconds - please replace the heat alarm with new Sentech heat alarm.
WARNING: Lithium batteries can explode or cause burning if installed incorrectly.
Do not attempt to replace the battery.
Clean the heat alarm at least once a year. Separate the heat alarm carefully from
the installation plate by turning it counter-clockwise.
Clean the dust around the thermistor sensor head carefully. Test the heat alarm
after cleaning it.
Do not open or paint or modify the heat alarm!
Waste handing: The heat alarm should be disposed in accordance with normal
waste handing for electronics.
4. TECHNICAL INFORMATION
Operating principle: NTC thermistor
Warranty: 5 years
Alarm current: < 150mA
Voltage: 3V (built-in lithium battery)
Quiescent current: < 5uA
Operation temperature: 0°C~ 50°C
Static response temperature: Class
A1, 54°C ~ 65°C
Sound volume:
≥
85 dB at a distance
of 3 meters
Dimensions: 42.5 x Ø50.8mm
Weight: 47 g
Holding temperature of 3M
attachment tape -35°C~ 93°C
Maximum humidity: 93% RH non-
condensing
Conform to the standard:
EN60065:2014
5. MANUFACTURER’S GUARANTEE
The manufacturer provides a 5 year guarantee, starting from the purchase date of
the product.
If the heat alarm becomes defective during the guarantee period, the heat alarm
will be replaced with a new one providing the defective one is returned to the
distributor. The guarantee covers manufacturing or material defects in the product,
if the heat alarm has been used according to the user instructions and the
guarantee period has not expired. The guarantee period for a heat alarm that has
been replaced with a new one is the same as that of the original heat alarm.
The guarantee is not valid if:
1) the product is used, maintained, or tested contrary to the user instructions,
2) the defect has been caused by a negligent act by other than the manufacturer,
3) if the product has been modified or treated with force,
4) if it the guarantee receipt is missing.
The guarantee does not cover costs due to installation or battery replacement.
The manufacturer’s responsibility does not in any case exceed the price of a new
heat alarm. The manufacturer is not responsible for any damage or loss that has
been caused by a non-working heat alarm or negligence by the manufacturer.
This guarantee does not affect rights enacted by law.
Australasian Distributors:
CSL - Cuthbert Stewart Limited.
22 Fisher Crescent,
Mt Wellington, Auckland.
PO Box 62293,
Sylvia Park 1644
Freehone: 0800 288 423
Phone: +64 9 928 1000
Fax: +64 9 489 1752
Email: [email protected]
