Clarke GRH125 PROPANE GAS HEATER Instructions

PROPANE GAS HEATER
MODEL NO: GRH125
PART NO: 6920017
OPERATION & MAINTENANCE
INSTRUCTIONS
ORIGINAL INSTRUCTIONS

INTRODUCTION

Thank you for purchasing this CLARKE Gas Heater. designed for industrial use only, i.e. NOT for domestic use.
This portable gas heater is designed to BS 4096 for industrial applications, to give safe, efficient, and reliable operation, and is 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 equipment, optimum performance will only be achieved if the correct application and servicing procedures are followed.
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.
Proper combustion depends upon the airflow; therefore, the heater must not be modified or operated with parts removed or missing. Likewise, safety systems must not be circumvented or modified in order to operate the heater.

FUNCTION AND OPERATING PARAMETERS

This is a gas-powered heater. Its intended use is for drying and warming commercial/industrial buildings where adequate ventilation is provided.

• It must be operated as prescribed in the operating manual.
• Is not intended to be used for domestic use or for the heating of habitable areas.
• Is not intended to be used to reach and maintain a certain level of human thermal comfort within an enclosed space in which the heater is situated.
• Is not intended to be used in enclosed areas with restricted ventilation.
• Is not for use in areas with high levels of fluctuating drafts.
• Is not intended for warming animals or livestock.

GENERAL SAFETY PRECAUTIONS

Read, and make sure you fully understand the following precautions and the hazards associated with this type of equipment.

1. Check the heater thoroughly for damage. DO NOT operate a damaged heater.
2. DO NOT modify the heater or operate a heater that has been modified from its original condition.
3. Use only propane gas.
4. Use only VAPOUR WITHDRAWAL propane supply. If there is any question about vapor withdrawal, ask your propane dealer.
5. Mount the propane cylinders vertically (shut-off valve up). Secure them from falling or being knocked over and protect them from damage.
6. Locate propane containers at least 6ft, from the heater.
7. IMPORTANT: Use only the hose and regulator assembly provided with the heater. Inspect the hose assembly before each use of the heater. If there is excessive abrasion or wear, or the hose is cut, replace it with the hose assembly listed on the parts list before using the heater.
8. Not to be used for the heating of habitable areas of domestic premises; for use in public buildings, refer to national regulations.
9. For indoor use only in well-ventilated areas.
10. If at any time gas odor is detected, IMMEDIATELY STOP operation until the source of gas has been located and corrected.
11. Install the heater such that it is not directly exposed to water spray, rain, and/or dripping water.
12. Maintain minimum clearance from normal combustible material (e.g. paper) as stated on page 4.
13. Due to the high surface and exhaust temperatures, adults and children must observe sufficient clearances to avoid burns or clothing ignition.
14. Operate only on a stable, level surface.
15. Do not use ductwork. Do not restrict air inlet or exit.
16. Do not move, handle or service while hot or burning.
17. Use only in accordance with local codes.
18. Do not place torsional stress on any hoses.

MINIMUM FRESH AIR OPENING REQUIREMENTS

• Do not use in unventilated areas.
• The flow of combustion and ventilation air must not be obstructed.

Warning: PROVIDE AT LEAST 3FT OPENING OF FRESH, OUTSIDE AIR WHILST RUNNING THIS HEATER. IF PROPER FRESH OUTSIDE AIR VENTILATION IS NOT PROVIDED, CARBON MONOXIDE POISONING CAN OCCUR.

MINIMUM CLEARANCES FROM COMBUSTIBLES

RISKS OF CARBON MONOXIDE POISONING

Even though this heater operates very close to 100 percent combustion efficiency, it still produces small amounts of carbon monoxide.

• Carbon Monoxide (CO) is toxic.
• Pregnant women, persons with a heart or lung condition, anemia or under the influence of alcohol, or those at high altitudes, are more likely to be affected by Carbon Monoxide.
• CO can build up in a confined space and failure to provide adequate ventilation can be fatal.

The early symptoms of asphyxiation caused by inadequate ventilation are:

• headache
• dizziness
• nausea
• dry mouth or sore throat

Should anyone show these symptoms, they must GET FRESH AIR IMMEDIATELY.
Turn off the heater and have it serviced before using it again.
Be sure to follow all warnings in this manual.
WE RECOMMEND THE USE OF A CARBON MONOXIDE DETECTOR

IF YOU SMELL GAS

LP gas and natural gas have man-made odorants added specifically for the detection of fuel gas leaks.
If a gas leak occurs you should be able to smell the fuel gas. Since Propane (LP) is heavier than the air you should smell for the gas odor near the floor. ANY GAS ODOUR IS YOUR SIGNAL TO GO INTO IMMEDIATE ACTION!

1. Do not take any action that could ignite the fuel gas. Do not operate any electrical switches. Do not pull any power supply or extension cables.
   Do not light matches or any other source of flame. Do not use your telephone.

2. Get everyone out of the building and away from the area immediately.

3. Close all propane (LP) gas tanks or cylinder fuel supply valves, or the main fuel supply valve located at the meter if you use natural gas.

4. Propane (LP) gas is heavier than air and may settle in low areas. When you have reason to suspect a propane leak, keep out of all low areas.

5. Use your neighbor’s phone and call your fuel gas supplier and your fire department. Do not re-enter the building or area.

6. Stay out of the building and away from the area until declared safe by the firefighters and your fuel gas supplier.

7. FINALLY. let the fuel gas service person and the firefighters check for escaped gas. Have them ventilate the building and area before you return. Properly trained service people must repair any leaks, and check for further leakages. and then re-light the appliance for you.

8. If you smell even a small amount of gas, CONTACT YOUR FUEL GAS SUPPLIER IMMEDIATELY. DO NOT WAIT!

NO ODOUR DETECTED

1. Some people cannot smell the odor added to propane (LP) or natural gas.
   You must determine if you can smell the odourant in these fuel gases.

2. Learn to recognize the odor of propane (LP) gas and natural gas.
   Local propane (LP) gas dealers will be more than happy to give you a scratch and sniff pamphlet. Use it to become familiar with the fuel gas odor.

3. Smoking can decrease your ability to smell. Being around an odor for a period of time can affect your sensitivity to that particular odor. odors present in animal confinement buildings can mask fuel gas odor.

ODOUR FADING

1. The odourant in propane (LP) gas and natural gas is colorless and the intensity of its odor can fade under some circumstances.
2. If there is an underground leak, the movement of gas through the soil can filter the odourant.
3. Propane (LP) gas odor may differ in intensity at different levels. Since Propane (LP) gas is heavier than air, there may be more odor at lower levels.
4. Always be sensitive to the slightest gas odor. If you continue to detect any gas odor, no matter how small, treat it as a serious leak.

CRITICAL POINTS TO REMEMBER!

1. Propane (LP) gas has a distinctive odor. Learn to recognize the odors.
2. A periodic sniff test around the joints; i.e. hoses, and connections. etc. is a good safety practice under any conditions.

FEATURES

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 three basic systems:

1. The gas system.
2. The ignition system.
3. The safety control system.

GAS SYSTEM
The gas supply to the machine is by means of a high-pressure hose, connected to an LPG cylinder, via a pressure regulator.
When the gas valve is opened, gas will flow to the Control Valve and finally the burner.
This heater is designed for use with PROPANE gas ONLY. Gas bottles are not supplied, but are readily available from builders merchants or gas suppliers, etc.
This heater is designed to operate with a minimum 20-pound (9 kg) propane tank. You may need two or more tanks or one larger tank in colder weather.
Use a 100-pound (45 kg) tank for longer operation or in very cold weather. Less gas is vaporized at lower temperatures. Your local propane gas dealer will help you select the proper supply system. The minimum surrounding air temperature rating for each heater is -20 ºF (-29 ºC).

IGNITION SYSTEM
A Piezo-electric igniter is positioned at the burner head. When the Igniter button is depressed, a high-intensity spark is generated, which ignites the gas.
The heat from the flame is sensed by a thermocouple, which is connected to the Flame Failure Valve. As the thermocouple heats up the Safety Cut-off Valve opens, so that after a short period, the Control Valve button (see Operation) may be released, and the main flame is established.

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.

INSTALLATION

Read these instructions carefully. Do not allow anyone who has not read these instructions to light, adjust, or operate this heater.
Do not attempt to operate the heater with any gas other than propane.
This heater, including hose and regulator assembly, must be inspected at least annually by a qualified service person. If the hose shows evidence of excessive abrasion or wear or if the hose is cut, it must be replaced prior to the heater being put into operation. The replacement hose assembly shall be that specified by Clarke International.

UNPACKING

1. Remove the heater from the carton.
2. Remove all protective material that may have been applied to the heater for shipment.
3. Check the heater for possible shipping damage. Should any damage be apparent, please notify your Clarke dealer immediately.

LOCATING THE HEATER
The heater and propane gas cylinder must be located on a hard, flat, level surface to minimize the risk of accidental tipping. The propane gas cylinder should be adequately restrained to prevent accidental tipping. Only operate this heater with the supply cylinder in the upright position.
This appliance must be installed only in locations where the potential for physical damage to the appliance, or to individuals (burns), is reduced to a minimum.
The heater must be installed in a location such that it will not be exposed directly to water spray, rain, and/or dripping water.
The use of this heater in a draft/windy area decreases its efficiency. If possible, operate the unit in a draft-free area.
The heater must be located at least 6 feet away from the propane cylinder and must not be directed towards any gas cylinder.
If more than one heater is to be used, they and the supply cylinders must be separated by at least 20 feet.
Position the heater at a safe distance from combustible materials.
This heater must not be placed on wooden floors or other combustible materials.
When used, the heater should rest on suitable insulating material at least 1 inch thick and extend 3ft or more beyond the heater in all directions.

GAS CONNECTION
The connection to a propane cylinder must be made in a well-ventilated area using the regulator and hose assembly supplied with the appliance. DO NOT attempt to adjust this regulator. It has been preset at the factory to provide safe and proper operation of the appliance.
Attach the regulator to the gas cylinder ensuring the cylinder orifice is perfectly clean – blow out with compressed air if necessary, or open the gas valve quickly and briefly to blast away any dust or dirt. Turn the nut in an anticlockwise direction – i.e. LEFT-HAND THREAD, until tight. DO NOT use a thread compound on threads. To check for leaks, use soapy water, or liquid soap ONLY.

IMPORTANT: The gas hose and cylinder must ALWAYS be located at a distance of at least 6 ft from each other.
In order to reduce the risk of icing up, when operating at long periods of maximum capacity, you should use a larger capacity gas bottle or two/three bottles in parallel, as shown.
The tee piece and ‘pigtails’ are readily available from builders merchants or gas suppliers.

WARNING: Propane Gas cylinders must be used and stored in accordance with the ‘HIGHLY FLAMMABLE LIQUIDS AND LIQUEFIED PETROLEUM GASES REGULATIONS 1972.
Open the cylinder’s gas valve and check all gas connections with a soap and water solution. DO NOT USE A FLAME.
Always use full cylinders with good air circulation and no frost on the cylinders.
WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.

OPERATING INSTRUCTIONS

WARNING: BEFORE STARTING THE HEATER, YOU MUST ENSURE THAT THE MINIMUM VENTILATION REQUIREMENTS ARE OBSERVED TO  VOID THE RISK OF CARBON MONOXIDE POISONING.

FIRST USE
The heater reaches a very high temperature and during the first use, you may notice an odor coming from the heater – this is quite normal and will disperse quickly (It is recommended the heater is initially run outside to enable the odor to clear).
It should also be noted that the paint on the surface of the heater will discolor due to the heat being produced.

LIGHTING THE HEATER

1. Ensuring there is sufficient gas, and that it is correctly connected and leak-free, turn the Control Knob fully clockwise so that OFF is uppermost. To do this you must first push the knob IN.

2. Turn on the gas supply and check all fittings and connections for gas leaks, by smell, and if necessary, use a mild soap and water solution. NEVER use a match to check for gas leaks.

3. When satisfied, turn the control knob anticlockwise to the ‘Pilot’ position.

4. Press and hold the Control Valve IN, whilst repeatedly pressing the Piezo Electric starter (C) until the pilot light ignites. (The pilot light may be viewed through the window shown at ‘A’.
   NOTE: If a new gas cylinder has been connected, it may take some time for the gas line to be purged of air. Press the Piezo electric button every 1015 seconds until the pilot ignites. Continue to hold IN the control knob for approx. 1 minute, or until the pilot light remains lit when it is released.

5. With the pilot light lit, turn the control valve anticlockwise so that ON is uppermost. The burner will now ignite. NOTE: The heater, has a fixed, regulated gas flow
   NOTE: In cases where long runs of gas supply lines have been installed ahead of the appliance, it may be necessary to bleed trapped air out of supply lines before lighting the pilot. New installations generally require bleeding supply lines. It could take several minutes before the pilot can be lit, depending upon the length of the supply line.

SHUTTING OFF THE HEATER
FOR SHORT PERIODS

1. Turn the pilot knob to the pilot position.

FOR LONGER PERIODS

1. Turn the pilot knob to the pilot position, then push the knob in and turn a further quarter turn to the OFF position.
2. Close the propane supply cylinder valve.

CLEANING & MAINTENANCE

WARNING: NEVER ATTEMPT TO SERVICE THE HEATER WHILE IT IS CONNECTED TO THE PROPANE SUPPLY, IS OPERATING, OR IS HOT.
(SEVERE BURNS CAN OCCUR).

1. Turn the heater off and let it cool for at least 20 minutes before cleaning.

2. Keep the heater clean. Clean the heater annually or as needed to remove dust and debris. If the heater is dirty or dusty, clean it with a damp cloth. Use household cleaners on difficult spots.

3. Inspect the heater before each use. Check the connections for leaks.
   Apply a mixture of liquid soap and water to the connections. Bubbles forming show a leak. Correct all leaks at once.

4. Clean the inside of the heater using compressed air where possible. Blow air back and forth along the entire burner face until all dust has been dislodged from the surface of the screen. Blow air through the venturi from the control (orifice) end of the heater.

5. Inspect the hose/regulator assembly before each use. If the hose is highly worn or cuts it must be replaced.

6. The heater should be inspected at least annually by a qualified person.

ADJUSTING THE PILOT LIGHT
Pull off the control knob, then unscrew the hex head screw immediately beneath the control block to reveal the adjuster screw (arrowed).
Adjust the pilot light so that it burns steadily with a blue flame. It should not be yellow. Replace the hex headscrew.

TROUBLESHOOTING

2. Excess-flow check valve.
3. Excess-flow check valve.
4. Piezo ignition not sparking.| 1. Open the gas supply valve slowly
2. Close the propane supply valve closed the propane tank and re-open slowly.
3. Replace burner orifice.
4. Check igniter electrode gap is 5.0 mm (0.195 in). Check wire lead for damage Replace piezo igniter and/or igniter electrode as necessary. Do not bend
the electrode, this may cause breakage.
No gas flow to the burner.| 1. Cylinder gas tap closed.
2. Cylinder is empty.
3. Orifice is obstructed.
4. Gas leaks from the supply hose or from the tap.
5. Low gas pressure.
6. Thermocouple lose or needs to be replaced
7. Automatic control valve needs to be replaced.
8. Loose or broken wire.
9. Loose/mislocated thermocouple.
10. Defective thermocouple.
11. Defective control.| 1. Open the gas tap
2. Replace cylinder.
3. Remove the orifice and clean it.
4. Use soapy water to find the leak and repair it.
5. Check for proper gas supply.
6. Tighten the connection or replace the thermocouple.
7. Replace the automatic control valve.
8. Tighten or repair wire.
9. Tighten the thermocouple. Make sure that the thermocouple is located correctly between the reverberator and grid thermocouple wire.
10. Replace thermocouple.
11. Replace the controller.
The heater stops during operation.| 1. Excessive gas supply.
2. Insufficient gas supply due to ice formation on the cylinder.| 1. Check the pressure regulator and replace it if necessary.
2. Check & use a larger cylinder, or two or more in parallel.

SPECIFICATIONS

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 affect your statutory rights.

PARTS DIAGRAM

PARTS LIST

DECLARATION OF CONFORMITY

INTERNATIONAL
Heimdall Sheet, Epping, Essex CM t6 4LG
DECLARATION OF CONFORMITY
This is an important document and should be retained.

We hereby declare that this product(s) complies with the following statuary requirement(s): 2016/426 Appliances Burning Gaseous Fuels.
The following standards have been applied to the product(s): BS EN 1643,1:2014

• A2:2018, BS EN 16129:2013.
  The technical documentation required to demonstrate that the product(s) meets) the requirement(s) of the aforementioned legislation has been compiled and is available for inspection by the relevant enforcement authorities.
  The UKCA mark was first applied in 2022
  Product Description: Portable Gas Bottle Radiant Heaters.
  Model number(s): GRH35, GRH125
  Serial/batch Number: N/A
  Date of Issue: 01/07/2022

Signed:

INTERNATIONAL
Fitzwilliam Hall,Fitzwiliam Place, Dublin 2
DECLARATION OF CONFORMITY
This is an important document and should be retained.

We hereby declare that this product(s) complies with the following statuary requirement(s): 2016/426 Appliances Burning Gaseous Fuels.
The following standards have been applied to the product(s): BS EN 1643,1:2014

• A2:2018, BS EN 16129:2013.
  The technical documentation required to demonstrate that the product(s) meets) the requirement(s) of the aforementioned legislation has been compiled and is available for inspection by the relevant enforcement authorities.
  The UKCA mark was first applied in 2019
  Product Description: Portable Gas Bottle Radiant Heaters.
  Model number(s): GRH35, GRH125
  Serial/batch Number: N/A
  Date of Issue: 01/07/2022

Signed:

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PARTS & SERVICE: 0208 988 7400
Parts Enquiries Parts@clarkeinternational.com
Servicing & Technical Enquiries Service@clarkeinternational.com
SALES: UK 01992 565333 or Export 00 44 (0)1992 565335
INTERNATIONAL Hemnall Street, Epping, Essex CM16 4LG
www.clarkeinternational.com

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