Clarke Little Devil Installation and operation manual

GAS HEATERS
OPERATING & MAINTENANCE
INSTRUCTIONS
Model Nos:
Little Devil • Devil 850 • Devil 1250 • Devil 1850 • Devil 3150
GAS HEATERS
0802

2
Should you experience difficulty in setting
up or operating this equipment, please
contact your Clarke dealer, or Clarke
International helpline on:
020 8588 7400
For Spare Parts and Service, please contact your nearest dealer,
or CLARKE International, on one of the following numbers.
PARTS & SERVICE TEL: [phone]
PARTS & SERVICE FAX: [phone]
or e-mail as follows:
PARTS: [email protected]

Thank you for purchasing this CLARKE Gas Space Heater.
This range of portable, direct fired gas heaters is designed to BS 4096 for industrial
applications to give safe, efficient and reliable operation, and are for use with
Propane Gas only. Propane gas bottles are not supplied with the unit, but are
readily available from Builders Merchants or gas suppliers.
As with all mechanical equipments, optimum performance will only be achieved
if the correct application and servicing procedures are followed.
Please read this leaflet thoroughly and follow the instructions carefully before
attempting to use the heater. In doing so you will ensure the safety of yourself
and that of others around you, and you can look forward to it giving you long
and reliable service.
CONTENTS PAGE
Safety Precautions ............................................................................ 4
Electrical Connections...................................................................... 5
Gas Connection ................................................................................ 6
Changing Gas Bottles ....................................................................... 6
Operation ........................................................................................... 7
Starting Procedure ............................................................................ 8
Stopping Procedure .......................................................................... 9
Fresh Air Requirements ...................................................................... 9
Maintenance ..................................................................................... 10
Specifications ..................................................................................... 10
Trouble Shooting ................................................................................ 11
Wiring Diagrams ................................................................................. 12-13
Parts Lists and Diagrams ................................................................... 14-23
GUARANTEE
This CLARKE product is guaranteed against faulty manufacture for a period
of 12 months from the date of purchase. Please keep your receipt 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.
3

SAFETY PRECAUTIONS
WARNING!
Lack of ventilation can cause Carbon Monoxide poisoning.
Carbon Monoxide poisoning can kill.
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 at high altitudes, are more likely to be effected by Carbon Monoxide
than others.
Read, and make sure you fully understand the following precautions and the hazards
associated with this type of equipment.
•Use ONLY Propane gas
•Ensure the Propane gas bottle, gas hose and electric cable, are positioned behind
the unit, well away from the heat
•Ensure all gas hose and regulator connections are GAS TIGHT, and the hose is not
kinked.
•NEVER use the heater where Gasoline, Paint thinner or other highly flammable vapour
or high dust content is present.
•Use ONLY with the electrical voltage specified, and ensure the appliance is properly
earthed.
•Use ONLY in well ventilated areas. Provide ventilation of at least 100 square inches of
fresh air for every 100,000 BTU/ hr of rating.
•The minimum clearance from any combustible materials is 8 feet (250cm) from hot
air outlet and 4 feet (125cm) from the top and sides.
•Stand the heater on a stable, level surface whilst hot or operating. If the heater
should overturn, a fire could occur.
•Keep children and animals away from heater at all times.
•Use heater in accordance with all fire regulations.
•NEVER use heater in living or sleeping areas.
•NEVER leave a heater plugged in without adult supervision if children or animals are
likely to be present.
•NEVER move, handle, replenish gas supply or service the heater, when it is hot,
operating or plugged in.
•NEVER attach duct work, or impede air flow into or out of heater.
•Disconnect the heater from the power supply when not in use.
•Use ONLY the regulator supplied with the machine.
•DO NOT exceed the limit of 240Btu/hr, per square metre of room area.
•If the machine works for long periods at maximum capacity, be aware that it is possible
for ice to form on the cylinder, due to excessive evaporation.
•NEVER direct hot air towards the cylinder in order to de-ice.
4

ELECTRICAL CONNECTIONS
Connect the mains lead to a standard, 230 Volt (50Hz) electrical supply through
an approved 13 amp BS 1363 plug, or a suitably fused isolator switch.
With the exception of the Little Devil and Devil 650, the appliance may also be
connected to a 110 Volt supply, through a suitably approved plug.
The conversion to 110V, is by means of a switch,
mounted on the rear panel of the unit, which is
held in place by a lock plate. To change the
voltage, remove the two self tapping screws
securing the plate, and remove the plate. Move
the switch to the appropriate position, and
replace the plate having turned it through 180O
as shown opposite.
WARNING! THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in the mains lead are coloured in accordance with the
following code:
Green & Yellow - Earth
Blue - Neutral
Brown - Live
As the colours of the flexible cord of this appliance may not correspond with the
coloured markings identifying terminals in your plug proceed as follows:
• Connect GREEN & YELLOW cord to terminal marked with a letter “E” or Earth
symbol ‘ ’ or coloured GREEN or GREEN & YELLOW.
• Connect BROWN cord to terminal marked with a letter “L” or coloured RED
• Connect BLUE cord to terminal marked with a letter “N” or coloured BLACK
If this appliance is fitted with a plug which is moulded onto the electric cable (i.e. non-
rewirable) please note:
1. The plug must be thrown away if it is cut from the electric cable. There is a danger of
electric shock if it is subsequently inserted into a socket outlet.
2. Never use the plug without the fuse cover fitted.
3. Should you wish to replace a detachable fuse carrier, ensure that the correct
replacement is used (as indicated by marking or colour code).
4. Replacement fuse covers can be obtained from your local dealer or most electrical
stockists.
5. The fuse in the plug must be replaced with one of the same rating (13 amps) and this
replacement must be ASTA approved to BS1362.
We strongly recommend that this machine is connected to the mains supply through a
Residual Current Device (RCD).
If in doubt, consult a qualified electrician. Do not attempt any electrical repairs yourself.
Fig.1
5

UNPACKING
On unpacking, check the heater for possible shipping damage. Should any
damage be apparent, please notify your Clarke dealer immediately.
Your heater is fully assembled, only the electrical and gas supply’s need
connecting.
PROPANE GAS SUPPLY
These heaters are designed for use with PROPANE gas ONLY. Gas bottles are not
WARNING
Propane Gas cylinders must be used and stored in accordance with the
‘Highly Flammable Liquids and Liquefied Petroleum Gases Regulations 1972’
supplied, but are readily available from Builders Merchants or gas suppliers etc
GAS CONNECTION
Connect the free end of the gas hose to the gas inlet connection on the machine, and
tighten to ensure there are no gas leaks. Before attaching the regulator to the gas cylinder,
ensure the mating parts are free from grease and dirt, and are undamaged.
Fit the regulator to the cylinder, tightening the thread as tight as possible with a
propane spanner, noting that the threads are LEFT HANDED. To check for leaks,
use soapy water, or liquid soap
IMPORTANT: The gas hose and cylinder must ALWAYS be located behind the
machine.
In order to reduce the risk of icing up
when operating at long periods at
maximum capacity, you should use a
larger capacity gas bottle, or two/three
bottles in parallel, as shown in Fig. 2.
The ‘Tee’ piece and ‘pigtails’ are
readily available from your Builders
Merchants or gas supplier
CHANGING GAS BOTTLES
1. Turn off the heater, and disconnect from the electrical supply.
2. Close the gas valve on the bottle, and unscrew the regulator, (left hand thread).
3. Ensure the replacement bottle screw threads and gas orifice is perfectly
clean before screwing in the regulator valve, tightly.
4. Check to ensure there are no leaks using soapy water, and when satisfied,
plug in to the electrical supply, and restart the machine.
Fig.2
6

OPERATION
Understanding the basic operation of the heater, will reinforce the need to
maintain the unit in top condition at all times, whilst always observing the safety
precautions.
The heater comprises four basic systems:
1. The gas system.
2. The air system.
3. The ignition system.
4. The safety control system.
1. Air System
An axial fan, which is energised when switching ON, provides the main air flow.
2. Gas System
The gas supply to the machine is by means of a high pressure hose, connected
to a LPG cylinder, via a pressure regulator.
When the mains supply is switched on, the Safety Shut-off Valve Solenoid is
energised, allowing the gas to flow to the Flame Failure Valve, and when the
Failure Valve Override knob is depressed, gas flows to the Burner Head.
3. Ignition System
A Piezoelectric Igniter is positioned at the burner head. When the Igniter button
is depressed, a high intensity 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 Flame Failure
Valve, causing the valve to open, so that after 5-10 seconds, the Override knob
may be released, and the main flame is established.
4. The Safety Control System.
Should the flame extinguish for any reason, the Thermocouple will quickly cool,
causing the Flame Failure Valve to close, shutting off the gas supply.
Similarly, should there be a power failure, causing the fan motor to stop, the
Safety Shut-Off Valve Solenoid will become de-energised, and therefore shut off
the gas supply.
Additionally, the machine is fitted with Thermal Overload Protection, which will
intervene should the unit overheat, shutting off the electrical supply.
7

STARTING PROCEDURE
WARNING!
Before starting the heater, you MUST ensure that the minimum ventilation
requirements are observed, to avoid the risk of carbon monoxide poisoning.
1. Ensuring there is sufficient gas, and that it is correctly connected, open the
valve on the gas cylinder, and open the regulator valve which is adjacent
to the gas inlet pipe. (Not applicable on the Little Devil).
2. Plug the heater in to a suitably earthed supply, and observing all precautions
previously stated, push the fan switch to the ON (I) position, (1, Fig.3), and
ensure the fan operates.
3. Fully depress the gas valve button (2, Fig.3), which is adjacent to the gas
inlet pipe, and push the ignition button (3, Fig.3), repeatedly, until the burner
ignites. Keep the gas valve button (4, Fig.3), depressed for a further 10
seconds approx., until the main flame is established.
Should the flame extinguish when the gas valve button is released, wait for
1 minute, before repeating the operation, this time, holding down the gas
valve button for a longer period.
NOTES:
The Little Devil and Devil 650 heaters have a fixed, regulated gas flow, whereas
all other models have a variable gas flow regulator so that you can regulate the
heat output by adjusting the regulator pressure.
Turning the knob clockwise will increase the pressure, and therefore the output,
anticlockwise to decrease.
If ignition is difficult or irregular, ensure the fan is operating, and that the air inlet
and outlet are completely free. Ensure also that the electrode gap is correct,
and that the electrode is clean (see Maintenance).
IMPORTANT:
Should the thermal overload protection feature operate, shut off the gas
supply, and allow the unit to cool for at least 10 minutes, with the fan running,
before attempting to relight the burner.
Should the other safety features (previously mentioned) operate, the heater
may be restarted once the cause of the problem has been found and rectified.
Fig.3
8

STOPPING PROCEDURE
1. Turn OFF gas at source. (Turn off cylinder valve).
2. Disconnect gas supply.
3. Allow fan to run for 2 - 3 minutes with burner off, in order to allow casing to
cool down.
4. Switch OFF fan, and disconnect electrical supply.
Minimum fresh air opening requirements
Heater Model Output Minimum Minimum
Btu/hr Ventilation ft2Ventilation mtrs2
Little Devil 34,000 0.25 0.023
Devil 650 60,000 0.36 0.035
Devil 850 78,500 0.75 0.07
Devil 1250 121,000 1.03 0.10
Devil 1850 170,000 1.40 0.13
Devil 3150 300,000 2.40 0.22
eg. For the Devil 1250 at max. output, a 3ft window must be open by 13" minimum
As a general rule of thumb, an opening of 1in2per 1000 Btu/hr is a minimum
requirement.
9

MAINTENANCE
It is essential that the heater is correctly maintained and kept in top condition at all times.
IMPORTANT
Before carrying out any adjustment or maintenance, ensure the heater is
switched OFF, disconnected from the mains and gas supply’s, and has been
given adequate time to cool down.
All models are similar, in that access to the working parts, is gained by removing
the rear panel, which is secured by 4 screws, (3 in the case of the Little Devil),
around its’ edge. Once removed, the panel complete with all components may
be lifted clear.
Monthly (When in constant use)
Ensure the electrode is clean, and the gap is no more than 5mm (see fig 4).
Check the condition of the gas hose, if there are any signs of deterioration, it
should be renewed, using only a CLARKE original spare part.
Ensure that all connections are clean and firm.
When necessary, clean the fan and inside of the heater thoroughly.
SPECIFICATIONS
Little Devil Devil Devil Devil Devil
Devil 650 850 1250 1850 3150
Min. Output (Btu/hr) - - 24,000 60,500 83,350 198,000
Max. Output (Btu/hr) 34,000 60,000 78,500 121,000 170,000 300,000
Gas Pressure Max (bar/psi) 0.3/5 0.7/10 1.5/22 1.5/22 1.5/22 2/30
Air Flow (m3/hr) 300 300 650 650 1,500 3300
Gas Consumption (kg/hr) 0.8 1.35 0.6 - 1.8 1.4 - 2.8 2 - 4 4.6 - 8.3
Nozzle Size (mm) 0.7 1.00 1.1 1.25 1.5 2.0
Motor Voltage (Volts) 230 -1ph 230 -1ph 110/230-1ph 230 -1ph 230 -1ph 230 -1ph
Power rating (Watts) 35 35 85 85 91 140
Input Current 230V (Amps) 0.26 0.3 0.7 0.35 0.42 0.5
110V (Amps) 0.3
Fuse Rating (Amps) 13 13 13 13 13 13
Dimensions (mm) 350x180x270 490x180x270 550x270x320 635x270x380 725x460x535 1075x420x565
Weight (kg) 5 6 13 15.5 23 30
Part No. 6920160 6920162 6920170 6920340 6920360 6920350
10

TROUBLE SHOOTING
1. Check power supply, power
cable and fuse, and replace if
necessary.
2. Check and if necessary,
replace.
3. Detect cause of overheating.
Wait for 5 mins, and restart. If
condition persists, contact
your Clarke dealer for advice.
1. No powerMotor does not start
Piezo does not spark
No gas flow to the
burner
The burner starts, but
stops as gas valve is
released.
1. Electrode in wrong
position
2. Faulty connection
between Piezo and
electrode.
1. Check position and reset if
necessary.
2. Check, and connect
properly.
1. Cylinder gas tap closed.
2. Cylinder is empty.
3. The nozzle is obstructed.
1. Open the gas tap.
2. Replace cylinder.
3. Remove the nozzle, and
clean it.
4. Use soapy water to find the
leak, and repair.
1. The thermocouple is
not warm enough.
1. Repeat the starting operation,
keeping the gas valve button
depressed for a longer time.
1. Excessive gas supply. 1. Check the pressure regulator,
and replace if necessary.
2. Check that fan motor works
properly.
3. Check, and use a larger
cylinder, or two or more in
parallel.
4. Investigate cause, check to
ensure there are no obstructions
to air flow. Check adequate
ventilation is provided. See also
‘Motor does not Start’
4. Gas leaks from the
supply hose or from
the tap.
FAULT CAUSE REMEDY
The Heater stops
during operation.
2. Faulty Motor/
Capacitor
3. Lock out of appliance
due to overheating.
11

WIRING DIAGRAMS
Little Devil, Devil 650 & Devil 850
F1 Safety Thermostat
M1 Fan Motor
Q1 Switch
Q2 Piezoelectric Ignition
S1 Thermocouple
S2 Ignition Electrode
S3 Gas Valve
X1 Terminal Board
S4 Solenoid Valve
Devil 1250
B1 Safety Thermostat
G1 Gas Valve
M1 Fan Motor
Q1 Switch
Q2 Piezoelectric device
S1 Ignition Electrode
S2 Thermocouple
Y1 Solenoid Valve
12
IMPORTANT: The wiring to these heaters should not be tampered with under
any circumstances. Should any wiring problems occur, contact your nearest
CLARKE dealer or qualified electrician.

Devil 3150
B1 Safety Thermostat
B2 Room (External) Thermostat
F1 Fuse
M1 Fan Motor
Q1 Switch
S1 Ionisation Probe
S2 Starting Electrode
Y1 Solenoid Valve
X1 Terminal Board
Devil 1850
B1 Safety Thermostat
C1 Capacitor
G1 Gas Valve
M1 Fan Motor
Q1 Switch
Q2 Piezoelectric device
S1 Starting Electrode
S2 Thermocouple
Y1 Solenoid Valve
X1 Terminal Board
13

LITTLE DEVIL
14

LITTLE DEVIL
15
1 Chamber 2003104255
2 Rivet 1004043000
3 Handle 1001015755
4 Aluminium Rivet 1004014800
5 Cone + Triangle 2003103655
7 Washer 1004001100
8 Body 2003104055
9 Grille 1008079955
10 Motor 1005061300
11 Fan 1008063655
12 Coupling 1001017855
13 Wire 2005054155
14 Screw 1004014000
15 Electrode 1005082755
16 Disc 2003060155
17 Screw 1004000100
18 Thermostat 1005062300
20 Burner 1008079755
21 Thermocouple 1006018355
23 Wire 2005054255
24 Fastening Ring 1004013100
25 Piezo Igniter 1005061200
26 Rubber Ring 1001005100
28 Terminal Board 1005064500
29 Switch 1005092855
30 Label 1004010955
31 Grommet 1005091455
32 Screw 1004012300
33 Support 2003059855
35 Cable 1005091600
36 Nozzle 1008063955
37 Fitting 1006020555
38 Solenoid Valve 1005069200
39 Valve 1006013355
40 Fitting 1006017955
42 Nut 1006013400
43 Screw 1004011600
44 Wire 2005054455
45 Blue Wire 2005054555
45 Brown Wire 2005054655
45 Earth Wire 2005054755
46 Hose 1009010255
47 Valve 1008060755
48 Pressure Regulator 1008072455
49 Cover Cap 1005092955
50 Fitting 1006014900
No. Description Part No. No. Description Part No.

DEVIL 850
16

DEVIL 850
17
1 Chamber 2003103855
2 Body 2003099855
3 Handle 1001014700
4 Rivet 1004043000
5 Washer 1004001100
6 Aluminium Rivet 1004043600
7 Grille 1008078455
8 Support 2003091355
9 Screw 1004012600
10 Hose 1009010355
11 Valve 1008094055
12 Pressure Regulator 1008094355
13 Adapter 1006014900
14 Cover 1001038255
15 Connector 2005076855
16 Fitting 1006004100
17 Hose 2009009555
18 Nut 1006018055
19 Olive 1006018055
20 Valve 1006015355
21 Fitting 1006026555
22 Fitting 1006020400
23 Hose 2002019555
24 Thermocouple 1006018355
25 Thermostat 1005087800
26 Screw 1004000100
27 Circlip 1004013100
28 Disc 2003099655
29 Electrode 1005063500
30 Wire 2005048355
31 Wire 2005071655
32 Rivet 1004043100
33 Burner 1008065655
34 Disc 2003104455
35 Fitting 1006026455
36 Washer 1006003500
37 Fitting 1006020755
38 Fan 1008058700
39 Coupling 1001017855
40 Motor 1005079155
41 Air Conveyor 2003099555
42 Black Cap 1005076000
43 Piezo Igniter 1005061200
44 Cable 1005102455
45 Screw 1004011600
46 Fair Lead 1005081755
47 Cap Cover 1005092600
48 Switch 1005092500
49 Rubber Ring 1001005100
50 Fitting 1006020555
51 Solenoid Valve 1005069200
52 Nozzle 1008065755
53 Nut 1006013400
54 Tap 1008095455
55 Fitting 1006026655
No. Description Part No. No. Description Part No.

DEVIL1250
18

DEVIL1250
19
1 Chamber 2003128455
2 Body 2003128355
3 Handle 1001014700
4 Rivet 1004043000
5 Washer 1004001100
6 Rivet 1004043600
7 Grille 1008078455
8 Support 2003091355
9 Screw 1004012600
10 Hose 1009016055
11 Valve 1008094055
12 Pressure Regulator 1008094355
13 Adapter 1006014900
14 Cover 1001038255
15 Connector 2005076855
16 Fitting 1006004100
17 Hose 2009009555
18 Nut 1006014100
19 Olive 100601055
20 Valve 1006015355
21 Fitting 1006026555
22 Fitting 1006020400
23 Hose 2002019555
24 Thermocouple 1006018355
25 Thermostat 1005087800
26 Screw 1004000100
27 Washer 1004013100
28 Disc 2003099655
29 Electrode 1005082836
30 Wire 2005048355
31 Wire 2005071655
32 Rivet 1004043100
33 Burner 1008094655
34 Disc 2003104455
35 Fitting 1006026455
36 Washer 1006003500
37 Fitting 1006020755
38 Fan 1008058700
39 Coupling 1001017855
40 Motor 1005079155
41 Air Conveyor 2003099555
42 Black Cap 1005076000
43 Piezo Igniter 1005061200
44 Cable 10051402455
45 Screw 1004011600
46 Fair Lead 1005081755
47 Cover 1005092600
48 Cap 1005092500
49 Rubber Ring 1001005100
50 Fitting 1006020555
51 Solenoid Valve 1005069200
52 Nozzle 1008094255
53 Nut 1006013400
54 Tap 1008096055
55 Fitting 1006026655
No. Description Part No. No. Description Part No.

DEVIL1850
20