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Introduction

Read these instructions fully and carefully. They are part of this product and contain important 
information relating to its operation and use. Always observe all safety instructions. If you have 
any questions or are uncertain regarding the use of this product seek specialist advice, refer to 
our internet side at www.dexaplan.com or contact the service office. Keep these instructions in 
a safe place and provide them to any third party who may require the information.

Proper use

This heat detector is intended for use indoors within private households. At a tempera-
ture above approx 60 °C the heat detector will sound a 85 dB(A) loud alarm signal, as a 
warning in case of fire.
Install heat detectors in areas in which dust, steam or cooking fumes could cause a 
false alarm from a smoke detector, for example in the kitchen, and possibly also in the 
cellar, laundry room and garage. Heat detectors must not be used in place of smoke 
detectors in escape routes, living rooms or bedrooms. Observe local building regula-
tions. In general smoke detectors react to fire quicker than heat detectors, therefore 
smoke detectors must be installed appropriately, especially in the hallway outside the 
room in which a heat detector is installed. Without the additional protection of smoke 
detectors, heat detectors will not provide adequate protection in case of fire.
The heat detector is powered by a 9 V block battery. The heat detector will only 
function when a correct and good condition battery is correctly inserted. Do not use 
rechargeable batteries.
Unless there is a legal responsibility, no liability will be accepted for any damages in 
particular to persons or property caused by non-functioning or incorrect functioning of 
the heat detector.
Smoke and heat detectors are no substitute for your duty of supervision and care, and are 
no substitute for property or life insurance. You are responsible for provision of adequate 
insurance cover. No liability for damages will be accepted in case of fire or false alarm.
This heat detector is not suitable for persons with impaired hearing. Replace the heat 
detector within 10 years from the date of manufacture.

Description

Q

   Bracket

W

   Fixing holes

E

   Recesses for bracket

R

   Battery contacts

T

   Battery

Y

   Battery-out lock

U

   Test button and indicator

Pack contents

1  Heat detector with bracket
1  9 V battery (in battery compartment)
2   Screws 
2   Wall plugs
1  Operation and safety instructions

Technical data

Operating voltage:  

9 V 

 DC

Current consumption: 

max. 20 mA

Power supply:  

9 V E- block battery

Battery life:  

min. 1 year

Alarm threshold:  

60 °C (+/- 5 °C)

Test button:  

tests battery and alarm signal 

Alarm signal sound level:  

85 dB(A) at 3 m distance

Indication of operation:  

indicator flashes approx every 45 seconds

Indication of alarm: 

indicator flashes approx every second

Low Battery warning:  

 min. 30 days; Beep together with flashing indicator 
approx every 45 seconds

Relative air humidity:  

10 - 90 %

Dimensions: 

approx. 106 x 51 mm (Ø x H)

Weight: 

approx. 125 g (including battery)

Safety instructions

The following instructions are for your own safety when installing and operating the 
heat detector. Please note that non-compliance with these safety instructions leads to a 
serious risk of danger.

Danger to life and risk of injury!

   

  Do not leave small children unsupervised with the packaging material, 

the device or with any small parts. Danger to life from suffocation!

   

  

Do not damage any gas, electricity or telecommunication lines when 
fitting the device. Danger to life, risk of injury and damage!

   

  

Ensure that the battery is inserted with the correct polarity. Ensure that the 
battery is not short circuited or exposed to excessive heat such as sunshine 

 

 or fire. The battery must also never be recharged. Danger to life from explosion!

   

Make sure that your hearing is not exposed to the loud alarm signal for any length 
of time and that the signal is not triggered close to the ears. This can cause serious 
damage to hearing.

   

  

Leaking or damaged batteries can cause acid burns if they come into 
contact with the skin. Always use suitable protective gloves when handling.

   

Never attempt to repair the device yourself. Otherwise there is a risk of damage to 
the device and of improper functioning. The guarantee will also be invalid.

   

Do not paint or apply any covering over the heat detector otherwise the function 
will be impaired!

   

  

Do not use an open flame to test the heat detector. Otherwise there is a 
risk to life and of damage through fire!

Preparation in case of fire

   

Draw up an emergency escape plan by drawing the escape routes on a floor plan 
of your home. Draw at least two escape routes  from every bedroom.

   

Discuss the emergency escape plan with all family members / occupants. Child-
ren will often hide when they are unsure of what action to take. Practice your 
escape routine together.

   

Familiarise all family members with the alarm sounds of the heat and smoke detec-
tors. They must be prepared for fire and must know what action they should take.

   

Determine a place outside your home for a meeting point. This way you can 
check if all persons have left the building.

   

Ask your fire brigade for advice about fire extinguishers and fire blankets and their 
use, and also about how you can best protect yourself against the danger of fire. 

What to do in case of fire?

   

Never use water to extinguish a chip-pan or deep-fat fryer fire as this causes an 

explosion. Use a fire blanket to cut off the  oxygen supply to the flames. 

   

Alert all occupants.

   

Keep calm and avoid panic. Follow your emergency escape plan. Your safe 
escape depends on clear thinking and remembering what you have practiced.

   

Leave the house as quickly as possible using the safest exit. Do not waste time 
getting dressed or collecting valuables. Do not use lifts.

   

Close all doors behind yourself in order to slow down the spread of the fire.

   

If you have to cross a smoke filled room, keep your head as low as possible. Hold a 
(preferably damp) cloth in front of your mouth.

   

Feel doors before opening them. 

 

-  if these are warm, it is possible they are holding back the fire. Try to find an 

alternative escape route.

 

-  if the surface of the door is cool, then hold your shoulder against the door and 

open it carefully a few centimetres.  
If you can see smoke or flames then close the door.

   

Call the fire brigade as soon as you have left the house. Give your exact address 
and wait at the roadside until the fire brigade arrives.

   

Do not return into a burning house. 

Where to locate

o

   

Install the heat detector in areas in which dust, steam or cooking fumes could 
cause a false alarm from a smoke detector, for example in the kitchen, and 
possibly also in the cellar, laundry room and garage. The heat detector must not 
be used in place of a smoke detector in escape routes, living rooms or bedrooms. 
Observe local building regulations. In general smoke detectors react to fire quicker 
than heat detectors, therefore smoke detectors must be installed appropriately, 
especially in the hallway outside the room in which the heat detector is installed.

o

   

Check that the alarm sound is loud enough in the bedrooms to wake occupants 
in the case of fire.

o

   

The heat detector must be installed on the ceiling, as close to the centre of the 
room as possible. The distance to each wall must not exceed 5,3 m. The distance 
between two heat detectors within a room should not exceed 5,3 m. In larger 
rooms the installation of additional heat detectors may be necessary.

o

   

The distance to walls and corners must not be less then 30 cm.

o

   

A closed door or other obstacles will block heat from the device and reduce the 
audibility of the alarm sound. Install an adequate number of detectors.

o

   

The heat detector must be easily accessible for testing and battery replacement.

o

   

For complicated or larger dwellings seek advice from a fire safety specialist or 
from the fire brigade.

Example: Flat  

 

 

Example: House

Bedroom

Bathroom

Kitchen

Living 

room

Children’s 

room

Children’s 

room

 

Attic room

Bedroom

Children’s room

Living room

Kitchen

Heating room

Laundry

Garage

Smoke detector: min. protection
Smoke detector: max. protection
Heat detector

Locations to avoid:

o

   

Areas with high air humidity, e.g. Bathroom or shower room.

o

   

On the wall or near doors, windows, heaters, fans etc. where drafts may divert 
heat from reaching the detector.

o

   

Areas where the temperature is regularly below 5 °C or above 40 °C. 

o

   

Near fluorescent tubes or mains cables, or in areas with an above average level 
of electrical “noise” (minimum distance 50 cm).

o

   

Areas where excessive dust or dirt may impair the function of the detector (eg. in 
workshops or barns).

Installation

o

   

Remove the heat detector from the bracket 

by turning it counter-clockwise.

o

   

Hold the bracket in the chosen location, and mark through the fixing holes 

using a pencil.

o

   

Drill holes for the screws at the marked points.

o

   

Fix the bracket using the screws and wall plugs provided.

o

   

Place the battery 

into the battery compartment so that the battery polarity is 

correct for the battery contacts 

R

 (see +/- marking on the back of the housing).

o

   

Place the heat detector onto the bracket so that the ends of the bracket fit into 
the recesses for the bracket 

E

o

   

Push the heat detector slightly upwards and turn it clockwise until it locks.

o

   

A battery-out lock 

Y

 prevents the heat detector being fitted if the battery is missing.

o

   

Test the function of the device by pressing the test button 

for up to 4 seconds 

until the alarm sounds.

Operation

Normal operation

The indicator 

flashes approx every 45 seconds.

Alarm

If the device detects a high temperature a loud pulsating alarm sounds and the indi-
cator 

U

 flashes approx. every second. In case of an alarm, always check if there is a 

fire. If you are in doubt, always assume that there is an actual fire and act accordingly 
(see: What to do in case of fire?). When the temperature decreases the heat detector 
will reset automatically into normal operation mode.

Low battery warning

If the device beeps approx. every 45 seconds, together with a flash of the indicator 

U

the battery must be replaced. 

Battery replacement

o

   

Remove the heat detector from the bracket by turning it counter-clockwise.

o

   

Remove the used battery from the heat detector.

o

   

Place a new battery into the battery compartment so that the battery polarity is 
correct for the battery contacts 

R

 (see +/- marking on the back of the housing).

o

   

Place the heat detector onto the bracket so that the ends of the bracket fit into 
the recesses for the bracket 

E

o

   

Push the heat detector slightly upwards and turn it clockwise until it locks.

o

   

Test the function of the device immediately after the battery replacement by 
pressing the test button 

for up to 4 seconds until the alarm sounds.

Heat detector HA 621

Dexaplan

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W

E

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KOE221_Content_LB4C.indd   1-5

05.10.2007   13:40:17 Uhr

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