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OWNER'S MANUAL

LP401, LP401A

(12 Volt DC)

LP405, LP405A

(12 Volt AC)

Propane Gas Detector

(12 Volt Hard-Wired with Optional 

Relay Output)

Introducing the LP401, LP401A,

LP405, LP405A Propane Gas

Detector

The LP401, LP401A, LP405, LP405A Propane
Gas Detectors are effective products for
detecting any build-up of propane gas in your
home. Dicon Global Inc., the maker of these
propane gas detectors, has been developing
and making products for detecting gases since
1985.

Your new detector:

Is easy to install
Monitors for propane gas continuously 

and sounds a loud (85db) alarm when it 
detects a build-up of propane gas.

Has a Test button so that you can test it 

at any time.

Tests itself continuously
Is listed by Underwriters Laboratories to 

UL1484 standard

Has a 5-year guarantee for the propane 

gas sensing element.

A. Why should you be concerned
about propane gas?

Propane gas is a colorless, flammable gas that
can be explosive if it escapes and builds up.

Propane is stored as a liquid under pressure,
so most likely sources of leaks are in the con-
nections to propane tanks for propane-pow-
ered heaters, stoves, refrigerators, furnaces,
and barbecues. When propane leaks, it
becomes a gas and can be ignited by a spark
or flame.

B. Where should you install the

detector?

Propane gas is heavier than air and therefore
collects in the lowest areas of rooms and
homes. To detect a dangerous concentration
of propane gas, you should place your detec-
tor near a propane appliance. You should also
place detectors on floors that are below the
floor with a propane appliance.  For example,
a leak in a kitchen can create a build-up of
propane in the basement.

You should install your detector as close to the
floor as possible.  

C. How should you install the

detector?

You must install the LP401, LP401A, LP405,
LP405A Propane Gas Detector on a wall as

close to the floor as possible.

To install the detector:

1. At the place where you are going to install
the detector, draw a horizontal line four inches
long.   
2. Place the circular mounting plate so that the
square holes are aligned on the line.
3. In each of the circular slots. Draw a mark to
locate a mounting plug and screw.

4. Remove the mounting plate.
5. Using the appropriate size drill, drill two
holes at the marks and insert wall plugs.
6. Using the two screws and wall plugs (all
supplied), attach the mounting plate to the wall
ensuring that the cord slot in the mounting
plate is down.

7. Slide the detector onto the mounting plate
so that the two arms on the mounting plate fit
into two slots in the back of the detector.

8. Ensure that the detector's 12 Volt wires 
are located in the cord slot or behind the
detector in an appropriately recessed area.

9. Give the detector a short counter-clockwise
twist to lock the detector in place. If the detec-
tor is not horizontal, you can remove it, re-
adjust the mounting plate, and re-install it until
it is horizontal.
10.Connect the 12 Volt source using the two
connectors supplied.  
11. (Models LP401A and LP405A only) con-

nect the three relay output wires (from the
back of the detector) using the connectors
supplied. The relay output wires have the fol-
lowing connections and are labeled as such:

the black wire is common
the red wire is from the normally-open 

contact.

the green wire is from the normally-closed 

contact

Note:

Steps 10 and 11 must be preformed by

qualified service personnel only. 

Ensure that any wires not connected are insu-
lated with a connector (supplied).

Wait for ten minutes before you test the detec-
tor. During that time, the alarm may sound
several times and the yellow (malfunction)
lights may light up once or twice as the detec-
tor cleans the sensor. This will also occur if the
power to the detector is interrupted.

D. How can you test the detector?

To test the detector, wait at least ten minutes
after installing it, press the test button. The
alarm sounds.

To reset the alarm, turn the 12 Volt supply off,
wait ten seconds, then turn it on again.

The detector continually checks itself. If it finds
a malfunction, it lights the yellow light. If this
occurs, call Dicon Global Inc. at 1-800-387-
4219.

E. How can you maintain your

detector?

A detector is only useful if it works. To keep it
working, all you need to do is:

vacuum the air vents occasionally to 

keep them free of dust.

test the detector by pressing the test 

button once a month.

F. What do the lights mean?

The detector has three lights:

Green (Power) light:

This lights up when the

detector has power. It is normal for this light to
be on while the detector is powered.

Red (Alarm) light:

This lights up when the

alarm sounds. It is normal for this light to turn

on when you press the Test button.

Yellow (Malfunction) light:

This lights up

when a detector finds a malfunction while it is
checking itself. It is normal for this light to turn
on once or twice after you power the detector
or after a power failure.

EVACUATE IMMEDIATELY!

Do a head count to check

that everybody is accounted

for. Call the nearest fire

department and ask them to

determine the source of

propane gas. Do not re-enter

the premises until the prob-

lem has been corrected and

the propane gas  has been

dispersed.

WARNING:

Activation of

this device indicates the

presence of propane gas,

which is flammable and can

be fatal. The source of the

gas may be an object such

as a furnace, a hot water

heater or other propane gas

appliances.

This detector will only indi-

cate the presence of

propane gas near the detec-

tor. Propane gas may be

present in other areas.

Correction of the problem

may require the services of a

local propane gas utility

company or contractor.

H. What do you do after the
problem has been corrected?

On re-entering the premises after an alarm:
1. Turn the 12 Volt supply off for ten 

seconds, and then turn it on again.

2. After ten minutes (during which the 

alarm may sound once or twice and 
the yellow light may flash), test the 
detector to make sure that the detector 
is working properly.

I. Technical Information

Your LP401, LP401A, LP405, LP405A
Propane Gas Detector uses a sensing technol-
ogy that enables the detector to sound an
alarm before concentration of gas reaches
25% of the Lower Explosive Limit (LEL).

Exposure times

The propane gas concentrations standard for
the alarms has been set by the Underwriters
Laboratories Inc. to be less than 25% of the
LEL.Therefore your unit will alarm immediately,
upon detection of dangerous levels.

J. Warranty Information

Limited Warranty

Dicon Global Inc. warrants its enclosed
Propane Gas Detector sensor to be free from
defects in material and workmanship under
normal use and service for a period of five (5)
years form date of purchase. Dicon Global Inc.
warrants it's enclosed Propane Gas Detector
other than the sensor to be free from defects
in materials and workmanship under normal
use and service for a period of one (1) year
from date of purchase. Dicon Global Inc.
makes no other express warranty for this
Propane Gas Detector. No agent, representa-
tive, dealer or employee of the company has
the authority to increase or alter the obliga-
tions or limitations of this Warranty. The com-
pany's obligation of this warranty shall be limit-
ed to the repair or replacement of any part of
the detector which is found to be defective in
materials or workmanship under normal use of
service during the first year period commenc-
ing with the date of purchase except for the
sensor which is warranted during the five year
period commencing with the date of purchase.
During the latter four (4) years of the warranty
period, such repairs or replacements other
than the sensor itself, shall be made at a
charge to the customer not to exceed the man-
ufacture's cost. Units in need of repair should
be returned to Dicon Global Inc. prepaid.
Please call 1-800-387-4219 for shipping
instructions. The company shall not be obligat-
ed 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 dura-
tion of any implied Warranty, including that of
merchantability or fitness for any particular
purpose, shall be limited to the period of one
(1) year on the detector and five (5) years on
the sensing unit commencing with the date of
purchase. In no case shall the Company be
liable for any consequential or incidental dam-
ages for breach of this or any other warranty
expressed or implied whatsoever, even if the
loss or damage is caused by the Company's

negligence or fault. Some states do not allow
the exclusion or limitation or incidental or con-
sequential damages, so the above limitations
or exclusion may not apply to you. This war-
ranty gives you specific legal rights, and you
may also have other rights which vary from
province to province.

Dicon Global Inc.

20 Steelcase Road West, Unit 3

Markham, Ontario, Canada L3R 1B2

IMPORTANT:

NOT SUITABLE AS A CAR-

BON MONOXIDE DETECTOR OR A
SMOKE OR FIRE DETECTOR. THIS
DEVICE IS NOT SUITABLE FOR INSTAL-
LATION IN A HAZARDOUS LOCATION, AS
DEFINED IN THE NATIONAL OR CANADI-
AN ELECTRICAL CODE.

G. What should you do if the
ALARM sounds?

Specifications
Power Supply Input Ratings
Models LP401 and LP401A: 12V DC, 600mA
Models LP405 and LP405A: 12 V AC, 600 mA
Optional Relay Output Ratings
Models LP401A and LP405A: class 2 output only 

30 V DC 1 A

Dimensions:

6.5” x 3.5” x 1.375”

16.5cm x 8.9cm x 3.5cm

Normal Operating Conditions:
Temperature:               4.4°C (40°F) to 37.8°C (100°F)
Gas Detection Level:

less than 25% LEL
of propane gas

Lights:

Power (green)
Alarm (red)
Malfunction( yellow)

P

ROPANE 

G

AS 

D

ETECTOR

D

ÉTECTOR DE 

G

AZ

P

ROPANE

Power

Alimentation

Alarm

Alarme

Malfunction

Défaillance

Test/

Essai

TM MC

IMPORTANT: This manual must be read, followed and

kept for future reference.

IMPORTANT: ce guide doit  être lu, suivi et gardé en lieu

sur pour consultation ultérieure.

(Français au verso)

Drilled hole, 
plugged

Screw hole
mark

Horizontal line

Horizontal line

Power

Alimentation

Alarm

Alarme

Malfunction

Défaillance

Test/

Essai

TM MC

Power

Alimentation

Alarm

Alarme

Malfunction

Défaillance

Test/

Essai

TM MC

Test Button

Power LIght - Green

Alarm Light - Red

Malfunction Light - Yellow

Horizontal line

2502-A0065

Owner’s Manual / Guide d’utilisation

Models / Modèles LP401 and LP401A

12 V DC / 12 V c.c.

Models / Modèles LP405 and LP405A

z

12 V AC / 12 V c.a.

Models LP401A and LP405A are equipped

with a Calss 2, 30V DC/1A realy output

Les modèles LP401A et LP405A sont fournis

avec un relais de sortie de 30 V c.c./1 A

de classe 2

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