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Parts & Service: 020 8988 7400 / E-mail: [email protected] or [email protected]
FEATURES OF THE GRH35
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 a LPG cylinder, via a pressure regulator.
When the gas valve is opened, gas will flow to the Control Valve and finally the
burner.
This heaters 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
o
F (-29
o
C).
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.
Heat from the flame is sensed by a thermocouple, which is connected to the
Flame Failure Valve. As the thermocouple heats up the 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.
Additionally, the machine is fitted with a ‘Tip Over Switch’, which operates
should the heater be moved from the vertical position i.e. tip over, thereby
shutting off the gas.
ALWAYS ensure that the Tip-Over switch is perfectly vertical and secure.
