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Installing the Battery 

NOTE: The battery is purposefully reversed during production to keep it fresh 
until installation.  
1. 

Remove the battery (supplied) from the battery compartment on the 
underside of the smoke alarm (see Fig. 8). And correctly fit it in the 
battery compartment. 

 

Fig. 8 – Fitting the battery

 

NOTE:  
1) 

The battery will snap into place and should not shake loose. 

2) 

The battery is polarity-dependent. Ensure it is inserted in the correct 
orientation. 

WARNING

: If the battery is not installed, the battery compartment will 

not close and the smoke alarm will continually sound a Battery Missing 

signal. 
NOTE: When the smoke alarm battery is first contacted, the alarm sounder 
may sound for 1 s. This is normal and indicates that the battery is positioned 
properly.  
2. 

Close the smoke alarm and mounting base. 

3. 

Connect the mains power. 

4. 

Check that the green LED turns on and red LED in the Test button 
flashes every 48 s. 

 

Tests

 

1. 

Press and hold the Test button for 3 s to check the smoke alarm audible 
warning operates and the red LED flashes rapidly. 

WARNING

: The smoke alarm has a loud alarm signal. Use hearing 

protection when testing smoke alarms. 

 

1. 

For interconnected smoke alarms, press and hold the Test button for 3 s 
on each smoke alarm, and check the smoke alarm sounder operates on 
all interconnected smoke alarms. 

2. 

Check that the red LED in the Test button operates only on the smoke 
alarm being tested. 

NOTE: Smoke alarms should be interconnected within only one family 
residence. Otherwise, you might encounter nuisance alarms when a smoke 
alarm is operated or tested in another residence. 

Normal Operation

 

Once installed and tested, your smoke alarm will immediately start monitoring 
for smoke. If the sounder in the smoke alarm operates, check for a fire and 
execute your safety plan. 
If the alarm was caused by a nuisance situation, open a window or fan the air 
to remove the smoke or dust from within the smoke alarm. The alarm will turn 
off as soon as the air is completely clear. Do not disconnect the mains power 
and battery to silence the smoke alarm. 

Hush 

WARNING

: Before using the Hush feature, identify the source of 

smoke and be certain that safe conditions exist. 
If investigation of the alarm signal is likely caused by a known nuisance source 
(such as cooking fumes), the Hush button can be pressed to silence the smoke 
alarm for 10 min. Press the Hush button again will return the unit to normal 
operation. 
The red LED on smoke alarm will flash once every 6 s while in the Hush 
condition. 
After the Hush time has expired, the smoke alarm will return to normal 
sensitivity. If smoke is still present, the alarm will re-activate. The Hush feature 
can be used repeatedly. 

Care and Maintenance

 

Weekly Tests 

1. 

Press and hold the Test button for 3 s on each smoke alarm. 

2. 

Check the smoke alarm sounder operates with a loud pulsating sound, 
and the red LED in the Test button flashes rapidly. 

WARNING

: The smoke alarm has a loud alarm signal. Use hearing 

protection when testing smoke alarms. 

3. 

For interconnected smoke alarms, check the smoke alarm sounder 
operates with a loud pulsating sound on all interconnected smoke alarms 
and the red LED in the Test button operates only on the smoke alarm 
being tested. Repeat the test on all interconnected smoke alarms. 

4. 

The alarm shall also be tested when back from a long away/vacation 
from the house. 

WARNING

: Never use a naked flame of any kind to test your smoke 

alarm. You may set fire to and damage the smoke alarm, as well as 
your home. The built-in Test button accurately tests all alarm functions. 

Annual Maintenance 

1. 

Vacuum or carefully wipe the cover of the smoke alarm to remove any 
dust, lint or dirt around the openings of the smoke alarm. Do not spray 
aerosols into the smoke alarm. 

2. 

After annual maintenance, test all smoke alarms. 

Low Battery Alert 

When the battery becomes depleted, the smoke alarm will signal a short beep 
every 48 s. Immediately replace the battery with an approved model (see the 
section User Replaceable Parts). 
NOTE: Batteries supply a lower voltage in cold conditions, so the Low Battery 
signal may start operating late at night. To avoid annoyance, keep a spare 
battery on hand. The Low Battery signal will operate for at least 30 days.  

Protection From Fire

 

Installing smoke alarms is only one step in protecting your family from fires. 
You should also reduce the chances that fires will start in your home and you 
must increase your chances of escaping safely if one does start. The following 
information will help you develop a fire safety program. 
1. 

Install smoke alarms properly. Carefully follow all the instructions in this 
manual. Keep your smoke alarms clean, and test them every week.  

2. 

Non-working smoke alarms will not alert you. Replace your smoke 
alarms immediately if they are not working properly. 

3. 

Follow fire safety rules, and prevent hazardous situations: 

 

Use smoking materials properly. Never smoke in bed. 

 

Keep matches and cigarette lighters away from children. 

 

Store flammable materials in proper containers. Never use them 
near open flames or sparks. 

 

Keep electrical appliances in good condition. Do not overload 
electrical circuits. 

 

Keep stoves, fireplaces, chimneys, and barbecue grills grease free. 
Make sure they are properly installed and away from any 
combustible materials. 

 

Keep portable heaters and open flames such as candles away 
from combustible materials. 

 

Do not allow rubbish to accumulate. 

 

Keep a supply of extra batteries on hand for your battery powered 
smoke alarms. 

Prepare and practice a family escape plan. Review the following with your 
children each time you have fire escape drills. This will help everyone 
remember them in case of a real fire emergency. 
1. 

Don’t panic and stay calm. Your safe escape may depend on thinking 
clearly and remembering what you have practiced. 

2. 

Get out of the house as quickly as possible. Follow a planned escape 
route. Do not stop to collect anything or to get dressed. 

3. 

Feel the doors to see if they are hot. If they are not, open them carefully. 
Do not open a door if it is hot. Use an alternate escape route.  

4. 

Stay close to the floor. Smoke and hot gases rise. 

5. 

Cover your nose and mouth with a wet or damp cloth. Take short, 
shallow breaths. 

6. 

Keep doors and windows closed. Open them only if you have to in order 
to escape. 

7. 

Meet at your planned meeting place after leaving the house. 

8. 

Call the Fire Service as soon as possible from outside your house. Give 
the address and your name. 

9. 

Never go back inside a burning building.  

10.  Contact your local Fire Service. They will give you more ideas about how 

to make your home safer from fires and how to plan your family’s escape. 

 

User Replaceable Parts

 

The following batteries are replaceable by the user, and may be purchased 
from general hardware stores. Use only the specified batteries. 

Test the alarm 

for correct operation using the test facility, whenever the battery is 
replaced

 

Alkaline

:

 Gold Peak GN1604A, Pairdeer 6LR61 

Carbon zinc: Gold Peak 1604S. Pairdeer 6F22 

Lithium: EVE CR9V/P 

WARNING

: When using lithium battery, there is a danger of explosion if the 

battery is incorrectly replaced. Replace only with the same or 
equivalent type. 

References

 

Document

Description

31-0164 

ZT-MS AC/DC smoke alarm datasheet 

NFPA 72 

National Fire Alarm Code, 

National Fire Protection Association, 

Inc. Quincy, MA 02269, USA 

Summary of Contents for ZT-MS

Page 1: ...hes simultaneously When the smoke chamber fault is given try vacuum the product on the outer surface especially the smoke inlet to remove dirt If the condition persists return the product for service Hush Button Pressing the Hush button will reduce the sensitivity of the smoke alarm for approximately 10 min The Hush button should only be used after the cause of the alarm is known such as normal co...

Page 2: ...an block openings to the sensing chamber and limit the smoke alarm from sensing smoke Near fresh air vents or high draft areas like air conditioners heaters or fans fresh air vents and drafts which can drive smoke away from smoke alarms In dead air spaces which are often at the top of a peaked roof or in apex of ceilings and walls Dead air may prevent smoke from reaching a smoke alarm See Fig 3 an...

Page 3: ...ions Annual Maintenance 1 Vacuum or carefully wipe the cover of the smoke alarm to remove any dust lint or dirt around the openings of the smoke alarm Do not spray aerosols into the smoke alarm 2 After annual maintenance test all smoke alarms Low Battery Alert When the battery becomes depleted the smoke alarm will signal a short beep every 48 s Immediately replace the battery with an approved mode...

Page 4: ...rer s cost Units in need of repair should be returned shipping prepaid to ZETA ALARMS LIMITED DETECTION HOUSE 72 78 MORFA ROAD SWANSEA SA1 2EN UNITED KINGDOM Zeta shall not be obligated to repair or replace units which are found to be in need of repair because of damage unreasonable use modifications or alterations occurring after the date of purchase The duration of any implied Warranty including...

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