Clarke MGH 1, 6920021 User guide

Only suitable for well insulated areas and not designed

to be the primary heat source

MOBILE GAS HEATER

MODEL NO: MGH1

PART NO: 6920021

USER INSTRUCTIONS

ORIGINAL INSTRUCTIONS DL0622 ISS 8

INTRODUCTION

Thank you for purchasing this CLARKE Mobile Gas Heater. This portable gas
heater is designed to give safe, efficient and reliable operation, and is for use
with LPG/Butane gas only. Gas bottles are not supplied with the unit, but are
readily available from builders merchants or gas suppliers.

Before attempting to use this product, please read this manual thoroughly and
follow the instructions carefully. In doing so you will ensure the safety of yourself
and that of others around you, and you can look forward to your purchase
giving you long and satisfactory service.

Read these instructions carefully. Do not allow anyone who has not read these
instructions to light, adjust or operate this heater.

GUARANTEE

This product is guaranteed against faulty manufacture for a period of 12
months from the date of purchase. Please keep your receipt which will be
required as proof of purchase.

This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for the purpose for which it was
intended.

Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission. This guarantee does not effect your
statutory rights.

ENVIRONMENTAL RECYCLING POLICY

Through purchase of this product, the customer is taking on the
obligation to deal with the WEEE in accordance with the WEEE
regulations in relation to the treatment, recycling & recovery and
environmentally sound disposal of the WEEE.

In effect, this means that this product must not be disposed of with general
household waste. It must be disposed of according to the laws governing
Waste Electrical and Electronic Equipment (WEEE) at a recognised disposal
facility.

If disposing of this product or any damaged components, do not dispose of
with general waste. This product contains valuable raw materials. Metal
products should be taken to your local civic amenity site for recycling of metal
products.

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THE FOLLOWING TABLE ADDRESSES THE INFORMATION
REQUIREMENTS OF REG.2015/1188

& ERP COMPLIANCE

Item Symbol Value Unit

Fuel

LPG butane Gaseous 28

[mg/kWh

input

] (GCV)

Space Heating Emission(*) No

Indirect heating fuctionality: [yes/no] No

Heat Output

At nominal heat output

At minimum heat output (indicative)

Pnom

Pnom

4.2 kW

1.55 kW

Auxiliary electricity consumption

At nominal heat output el

At minimum heat output el

In standby mode el

max

min

SB

N/A kW

N/A kW

0kW

Useful Efficiency (NCV)

X

At nominal heat output

At minimum heat output

nth, nom

nth, nom

91 %

N/A %

Type of heat output/room temperature control (select one)

Single stage heat output, no temperature control No

Two or more manual stages, no temperature control Yes

With mechanical thermostat temp control No

With electronic temperature control No

Electronic temperature control with day timer No

Electronic temperature control with week timer No

Other control options (multiple selections possible)

Room temperature control with presence detection No

Room temperature control with open window detection No

Room temperature control with distance control option No

Room temperature control with adaptive start control No

Room temperature control with working time limitation No

Room temperature control with black bulb sensor No

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GENERAL SAFETY PRECAUTIONS

1. ALWAYS read and ensure you fully understand the following precautions
and the hazards associated with this type of heater.

2. ALWAYS check for damage before using the heater. Check for broken parts
or anything that may affect its function. Any damage should be properly
repaired or the part replaced. If in doubt, DO NOT use. Consult your local
dealer.

3. ALWAYS keep children and animals well away from heater at all times.

4. NEVER carry out any modifications to this product. If experiencing difficulty
of any kind consult your local dealer.

5. NEVER move the heater when it is lit.

6. Use ONLY LPG/Butane gas. Ensure the gas bottle is correctly installed and
check for leaks following replacement, using soapy water. NEVER use a
naked flame to test for leaks.

7. ALWAYS ensure all gas hose and regulator connections are GAS TIGHT, and
the hose is not kinked.

8. NEVER use the heater where gasoline, paint thinner or other highly
flammable vapour or high dust content is present.

9. ONLY use in well ventilated areas. Provide a ventilation opening to fresh,
outside air.

10. ALWAYS locate the heater on a stable, firm level surface.

11. ALWAYS ensure that ample ventilation is present if the heater is being lit
following a long period without use.

12. Use heater in accordance with any applicable fire regulations.

13. NEVER use the heater in high-rise flats, in basements living or sleeping areas,
in vehicles or caravans.

14. NEVER leave a heater unsupervised when lit - someone should always be
responsible for monitoring it. Never leave the heater alight while sleeping.

15. NEVER move, handle, replenish gas supply or service the heater when it is
hot, or operating. Turn it off and wait for it to cool down first.

16. Use ONLY the regulator supplied with the heater.

17. ALWAYS ensure that the heater is positioned as described on page 7.

18. Never store gas cylinders any closer than 2 m from open drains, gullies or
openings to cellars. LPG is heavier than air and can collect at low levels.

19. This heater will be hot when in operation and due care should be taken.

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CARBON MONOXIDE WARNING

WARNING: LACK OF VENTILATION CAN CAUSE CARBON MONOXIDE
POISONING WHICH CAN BE FATAL.

Carbon Monoxide is a highly toxic, odourless, colourless and tasteless gas,
created by the incomplete combustion of carbon compounds due to a lack
of available oxygen in an enclosed space.

The signs of carbon monoxide poisoning are, headaches, dizziness and/or
nausea. Should anyone show these signs, they must GET FRESH AIR
IMMEDIATELY. Turn off the heater and have it serviced before using again.

Pregnant women, persons with a heart or lung condition, anaemia or under
the influence of alcohol, or those living at high altitudes, are more likely to be
effected by carbon monoxide than others.

CARBON MONOXIDE ALARMS

Due consideration should be given to the dangers of carbon monoxide
poisoning following incomplete combustion in an enclosed space. Carbon
monoxide detectors to BS EN 50291 are available for use in domestic premises.

Where a new appliance is installed in a dwelling, a carbon monoxide alarm
should be provided in the room where the appliance is located.

Carbon monoxide alarms should comply with BS EN 50291:2001 and be
powered by a battery, designed to operate for the working life of the alarm.
The alarm should incorporate a warning device to alert users when its working
life is due to pass. Mains-powered BS EN 50291 Type A carbon monoxide
alarms with fixed wiring (not plug-in types) may be used as alternative
applications, provided they are fitted with a sensor failure warning device.

The carbon monoxide alarm should be located in the same room as the
appliance:

• On the ceiling at least 300 mm from any wall or, if located on a wall, as

high up as possible (above any doors and windows) but not within 150
mm of the ceiling; and

• Between 1 m and 3 m horizontally from the appliance.

NOTE: Further guidance on the installation of carbon monoxide alarms is

available in BS EN 50292:2002 and from manufacturers
instructions. Provision of an alarm should not be regarded as a
substitute for correct use and regular servicing.

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FEATURES OF THE MGH1 HEATER

The MGH1 gas heater comprises three groups of components:

GAS SUPPLY COMPONENTS

The gas supply to the machine is by means of a high pressure hose,
connected to a gas cylinder, via a pressure regulator.

When the gas valve is opened, gas will flow to the control valve and finally the
burner. The heater can be operated at one of 3 settings using 1,2 or all 3
burner plates.

This heater is designed only to be used with a 15 kg LPG/Butane gas bottle.
Gas bottles are not supplied, but are readily available from builders merchants
or gas suppliers etc.

The minimum surrounding air temperature rating for the heater is min 5

o

maximum +40

C.

o

C -

IGNITION COMPONENTS

An igniter is positioned beside the Pilot Light. When the ignition button is
pressed, a spark is generated which ignites the gas. Heat from the flame is
sensed by a thermocouple which is connected to the Flame Failure Valve. As
the thermocouple heats up, a low voltage is fed to the Safety Cut-Off Valve,
causing the valve to open, so that after a short period, the Control Valve (see
‘Lighting the Heater’ on page 9) may be released, and the pilot flame is
established.

SAFETY COMPONENTS

The heater incorporates the following safety devices that will cause it to shut
down in unsafe conditions.

The Flame Failure Valve will shut off the gas if the flame extinguishes for any
reason. When the thermocouple quickly cools down, the gas supply is shut off
so that the heater will shut down automatically.

The Oxygen Depletion Sensor will shut off the gas if the CO
the air supply to the heater exceeds a pre-set value. The room should
therefore be well ventilated at all times.

NOTE: The Anti-Tilt Switch will turn off the heater if it is tipped over. If this

activates, set the heater upright, check for obvious damage and
wait 5-10 minutes before attempting to re-light the heater. This
device may also operate if the heater Is knocked against or
bumped.

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concentration in

2

INSTALLATION

When unpacking, check the heater for any damage that may have occurred
in transit and notify your Clarke dealer immediately should any be apparent.

The only assembly required is to connect the gas supply. Do not attempt to
operate the heater with any gas other than LPG/Butane. You should have
purchased a suitable 15 kg gas bottle for use with this heater.

This heater, including the hose and regulator assembly, must be inspected
before each use and at least annually by a qualified service person. If the
hose shows evidence of excessive wear or if the hose is cut, it must be
replaced prior to the heater being put into operation. The replacement hose
shall be that specified by Clarke International in the parts list on page 14.

POSITIONING THE HEATER

The heater must be located on a hard, flat, level surface to minimise the risk of
accidental tipping and the gas bottle should be held by the bottle retainer.
DO NOT operate this heater with the supply bottle in any other than the
upright position.

The heater must be located such that it will not be exposed directly to sources
of water. Use of this heater in a drafty area decreases its efficiency. If possible,
operate the unit in a draft free area.

MATERIAL CLEARANCES

It is recommended that the heater be
positioned with at least 500 mm clearance
to the sides and rear.

However, any household furnishings should
be a safe distance away as they could be
adversely affected by heat.

Always position the heater facing the
centre of the room and positioned as
shown in the diagram. Never place objects
on, or against the heater.

VENTILATION

This heater must only be installed in a room
which is well ventilated. Do not operate in
a caravan, boat, or any room of less than 40 cu/m in volume. Ventilation is
essential to reduce the dangers of carbon monoxide poisoning, and from
oxygen depletion.

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.

WARNING: IF FRESH, OUTSIDE AIR VENTILATION IS NOT PROVIDED,
CARBON MONOXIDE POISONING COULD OCCUR.

Adequate ventilation should also considerably reduce the possibility of
condensation occurring and lessen the dangers from the presence of any
undetected gas leakage. The following table shows the smallest sizes of room
suitable for each heat setting and the ventilation which should be provided.

Number of ceramic

burners in use

1

2

3

Room size Ventilation

Low Level High Level

40 m

70 m

105 m

3

3

3

105 m

40 m

70 m

2

2

2

40 m

70 m

105 m

2

2

2

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PREPARATION

INSTALLING THE BOTTLE

The connection to the gas bottle must be carried out in a well ventilated area,
using the regulator and hose assembly supplied with the heater. DO NOT
attempt to adjust this regulator. It has been preset at the factory to provide
safe and correct operation.

1. Remove the bottle retainer from
the back of the heater.

2. Fix the gas regulator to the gas
hose, securing it with the screwed
hose clip supplied.

3. Place the filled gas bottle into the
back of the heater with the valve
outlet facing outwards.

4. Connect the gas regulator onto
the outlet of the gas bottle using
the integral clasp.

5. When attaching the regulator to
the gas cylinder ensure the bottle
outlet is perfectly clean.

• Use compressed air if necessary to blow away any dust or dirt. When

connected, check for leaks using soapy water or liquid soap as
described below.

6. Secure the bottle with the bottle retainer.

TESTING FOR LEAKS

This must be carried out In a well ventilated area, free from any open flame or
other sources of ignition. With the regulator connected to the cylinder, slowly
turn on the regulator and proceed as follows:

1. Brush all hose connections including pipe connections to the gas valve,
regulator connection to the bottle and gas bottle valve with a 50:50
solution of soap and water.

2. A stream of bubbles forming Is an indication of a leak. If a leak is found, turn
off the valve on the regulator, disconnect the regulator from the gas bottle

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and remove the gas bottle to a cool, outdoor well-ventilated area.
Contact your Clarke dealer or gas supplier for assistance.

CAUTION: DO NOT USE IF A LEAK IS FOUND. DO NOT USE A NAKED
FLAME FOR TESTING. DO NOT OPERATE ANY ELECTRICAL EQUIPMENT IN
THE PRESENCE OF A GAS LEAK.

3. After leak-testing is satisfactorily carried out and no leaks found, it may be
necessary to twist the cylinder slightly to allow the regulator and hose to fit
Inside the heater casing without kinking the hose.

FITTING THE BATTERY

The ignitor battery and ignition button are supplied loose and require fitting.

1. Insert the battery into the socket and screw the ignition button into place in
the top of the heater.

LIGHTING THE HEATER

The heater can be regulated to one
of three different heat settings: LOW,
MEDIUM and HIGH. To light the
heater:

1. Open the valve on the gas
regulator.

2. Press down and turn the control
knob to LOW position.

• Do not release the control

knob.

3. After 10 seconds press the ignition
button until the pilot light (at the
bottom of the burner) ignites.

4. Continue to hold the control knob
down for 10-15 seconds after
ignition. If the pilot flame goes out
when releasing the button, repeat
the above operation.

NOTE: The first time you use a new

heater, it may be necessary
to hold the control knob down for a longer time in order to purge
air from the system.

Once the heater is alight, turning the control knob to MEDIUM or HIGH will light
the second and third panel automatically.

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5. When the heater is in operation, watch the pilot light and check that it is
burning steadily. If it flickers or has a yellow flame, the heater should be
checked by your dealer.

6. Leave the heater burning at the LOW setting for approx 5 minutes before
turning to a higher setting.

The heater can also be started at any of the 1 (LOW), 2 (MEDIUM) or 3 (HIGH)
positions but this is not recommended.

CHANGING THE SETTING

1. To select the desired heating level, press the control knob down slightly and
rotate until the knob locks at the desired position. Do not operate between
the locked positions.

TURNING THE HEATER OFF

1. Turn and press the control knob to the START position.

2. Turn off the regulator valve on the gas bottle, and if placing the heater into
storage, disconnect the bottle.

CHANGING THE BOTTLE

Always allow the heater to cool down before removing and replacing the
bottle. Never attempt to remove the regulator while the heater is operating.

Disconnect the gas regulator from the cylinder and remove the bottle after
releasing the bottle retainer from the back of the heater.

POSSIBLE FAULTS ON STARTUP

THE HEATER DOESN'T LIGHT

• Defective ignitor battery failing to produce a spark. Replace battery.

• Check the gas bottle Is full. Removing and tilting the bottle should reveal

the presence of LPG.

• Check the regulator Is properly attached to the bottle and the valve on

the regulator is turned on.

If this happens after the bottle has been changed, it could be:

• The bottle may have been excessively cold. Allow the bottle to reach

room temperature before attempting to start the heater.

• Air in the bottle. Hold the control knob down for a longer period of time

until the pilot and main burner light.

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THE HEATER TURNS OFF BY ITSELF

• If the heater turns off by itself after continuous working, repeat the

lighting operation, following the instructions faithfully.

• If it goes out soon after lighting, check for drafts or for the gas bottle

running out of gas.

• If it goes out after about 30 minutes, it Is an indication that ventilation in

the room is inadequate. If so, the heater may have been shut off by the
Oxygen Depletion Sensor. Open a window or door to ventilate the room
and re-ignite.

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CLEANING AND MAINTENANCE

WARNING: NEVER ATTEMPT TO SERVICE THE HEATER WHILE IT IS
CONNECTED TO THE GAS SUPPLY. ALLOW TO COOL BEFORE SERVICING.

CLEANING (annually or as required)

1. Turn heater off and let cool down before cleaning.

2. Use a damp cloth wrung out in a solution of soapy water to clean the
exterior and bottle storage area of the heater. Use household cleaners on
difficult spots.

3. Clean inside heater using compressed air where possible. Blow air back
and forth along the entire burner face and ceramic plates until all dust has
been dislodged from surface. Take care not to knock the ceramic plates
which can become fragile in use. Use compressed air to clean the pilot
light opening and the gas outlets.

4. Wipe the heater completely dry before use, ensuring that no water gets
into the burners or pilot light area.

5. Never use abrasive cleaners as they may damage the paint finish.

GENERAL MAINTENANCE

1. Inspect heater before bringing back into use. Check connections for leaks
by applying a mixture of liquid soap and water to hose connections. Any
bubbles forming show a leak, which must be corrected before use.

2. Regularly check the flexible tubing between the regulator and heater and
replace if cracked. In the event of damage or broken components,
replacements should only be obtained from Clarke Parts & Service.

3. Have the heater inspected yearly by a qualified service agent.

STORAGE

1. For long term storage, always disconnect the bottle and store the heater in
a well ventilated area away from combustible materials. The bottle is best
kept in an outbuilding and preferably not in a basement or indoors. Cover
the heater in its original packing and keep the unit dry and dust free.

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TROUBLESHOOTING

PROBLEM CAUSE REMEDY

Pilot light will not light
automatically.

Pilot light will not light
automatically but
switch & lead are OK
and the pilot will light
using a match.

Heater will not
remain alight when
pressure is released
from the control
knob.

Battery is flat. No
spark across
electrode gap.

Incorrect position of
spark in relation to
gas flow.

Electro-magnetic
contact close while
heater is alight.

Replace battery.
Request service technician to
check the piezo-electric switch is
functioning correctly.
Check the electrical lead to the
pilot light is not damaged.

Request service technician to re­position spark plug electrode so
that spark jumps across gas flow.

Request service technician to:
a) ensure that the thermocouple
probe is located in the pilot
flame.
b) ensure good connection
between thermocouple and
valve.
c) check thermocouple
d) check electromagnetic valve

After changing to
maximum position
with all 3 flames
alight, one or more
flames appears
below normal
intensity.

Difficulty in changing
from LOW/Medium/
High

Smell of gas Gas leakage from

a) blocked jets
b) partially blocked
supply tube
c) gas running out.

Air draught directed
away from first
nozzle. Position of the
pilot flame incorrect.

hose
or tube connection

Request service technician to:
a) remove and clean blocked jet
b) remove the supply tube and
jets and blow through tube.

a) Relocate the heater so that it
is not affected by draughts.
b) Request service technician to
adjust pilot so that flame is
closer to bottom corner of the
second nozzle as well as first
nozzle.

Carry out leak test to determine
source

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PROBLEM CAUSE REMEDY

Smell of burning Missing piece of

ceramic plate.

Pilot flame appears
red.

Patchy combustion
on ceramic plates

Dirt in gas nozzle Clean out any dust with

Dirty gas outlets.
Grime on ceramic
plates

Inspect perimeter of each
ceramic plate and locate
position of missing material.
Repair with fire cement and
leave to set for 24 hours.

compressed air

Clean out any dust with
compressed air

SPECIFICATIONS

Model Number MGH1

Dimensions (LxWxH) mm 420 x 350 x 735

Weight 8.8 kg

Fuel LPG/Butane Gas (15kg bottle)

Max Gas Consumption (kg/hr) 305 g/H

Max Rated Input 4.2 kW (14350 Btu/hr)

Heat settings High - 4.2 kW (14350 Btu/hr)

Med - 2.9 kW (9908 Btu/hr)

Low - 1.55 kW (5296 Btu/hr)

Operating temperature

Supply pressure 28 mbar

Please note that the details and specifications contained herein are correct
at the time of going to print. However CLARKE International reserve the right to
change specifications at any time without prior notice. Always consult the
heater’s data plate.

Min 5

o

C / Max 40oC

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PARTS DIAGRAM

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PARTS LIST

No Description No Description

1 Grille 20 Gas pipe 3

2 Reflector panel 21 Thermal baffle

3 Burner holder 22 Bottle retainer

4 Oxygen depletion sensor 23 Gas control valve

5 Connecting pipe 24 Igniter retaining nut

6Holder 25Valve control

7 Ceramic burner assembly 26 Valve retaining nut

8 Injection connector (short) 27 Push button igniter

9 Injection connector (long) 28 Control knob

10 Cabinet front panel 29 Angle gusset

11 Anti-tilt support 30 Burner back board

12 Anti-tilt switch 31 Pilot light assembly

13 Cabinet body 32 Flexible hose

14 Cabinet base 33 Jubilee clip

15 Castor wheel 34 Thermocouple

16 Ignition cable 35 AAA battery

17 Valve control cable 36 Gas regulator

18 Gas pipe 1 37 Spring

19 Gas pipe 2 38 Ignitor cap

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DECLARATION OF CONFORMITY - UKCA

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DECLARATION OF CONFORMITY - CE

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