Operating Instructions
1. Introduction
The STANDRAD SINGLE FURNACE No. 1360 is a non domestic portable high output furnace
for use with propane at 0.35 – 1 bar pressure. It is ideal for melting lead and other metals,
compounds bitumen, etc. The furnace is fitted with a needle valve, it is also supplied with a hose
tail end suitable for fitting to 4.8 bore LPG hose to BS 3212/2 (high pressure). To get the best
results from the furnace it should be used in accordance with these instructions and the enclosed
safety precautions leaflet giving general advice on the safe use of LP gas.
2. Ventilation and free space
Use only in a well ventilated area. The
minimum room size for the Standard
Furnace should not be less that 126m3(4453
ft3) with a free ventilation area of more than
315 cm2(49 in2) divided equally between
high and low levels. This free space and
ventilation area are in addition to those
required for any other gas appliance and
occupants of the room.
3. Positioning
Care should be taken to position the furnace
so that it cannot overheat the gas cylinder
(3m minimum distance) or any other
combustible surface or wall (300 mm
minimum distance). Avoid twisting or
kinking the flexible hose. Do not use
aerosols, paints, glues or other flammable
liquids in the same room as the furnace. Do
not use in basements or below ground level.
4. Gas supply
The furnace requires a propane gas supply
at 1 bar (15 psi) regulated pressure.
Minimum cylinder size 13 kg. Use a high
pressure propane regulator, either pre set to 1 bar or variable up to 1 bar (Bullfinch Variable
Tinyreg No. 1051/01 is suitable) and at least 3 m of high pressure 4,8 bore LPG hose to BS 3212/2
(Bullfinch No. 1299).
4.1 Connection to the gas supply
1 Fit hose to regulator and hose connector and secure with suitable hose clips.
2 Check that the regulator connection and the inside sealing face of the cylinder valve are clean
and undamaged, connect the regulator to the cylinder and spanner tighten the nut. It has a
left hand thread.
3 Check that the hose is not twisted or kinked and is secured to the fittings at both ends with
the appropriate clips and that the gas connections are tight. Ensure that the furnace valve is
in the off position and turn on the gas at the cylinder valve and if required adjust the
pressure regulator to 1 bar.
4 Check for gas leaks using a soap solution or leak detecting fluid as described in the Safety
Precautions. Do not light the furnace if it is leaking but turn off the cylinder valve and have
the furnace serviced. Never search for gas leaks with a naked flame.
5 When changing gas cylinders always ensure that there are no naked flames in the area. Check
that the cylinder valve is closed before disconnecting or reconnecting the furnace.
4.2 Lighting the furnace.
1 Adjust the pressure regulator to 1 bar and turn on the cylinder valve.
2 Open the furnace valve slightly to allow a small flow of gas to the burner and apply a flame
to the top edge of the burner, once the burner is lit open the valve fully. The flame should
burn fiercely without a yellow tip, with a dark blue outer mantle of approximately 270 mm
long with a lighter blue inner cone of approximately 120 mm long.
3 If a variable regulator is being used, the heat input can be varied by reducing the pressure at
the regulator.
4 After use turn the furnace off using the gas cylinder valve and allow the flame to die away
before closing the furnace valve. Do not turn on the cylinder valve again until the furnace is
about to be used.
If you are in any doubt about the use of the Standard Single Furnace, turn off the gas at the
cylinder valve and consult your dealer.
5. Technical data
Section 2
Maintenance and Servicing Instructions
6. Routine maintenance
The following routine maintenance checks should be carried out at regular intervals or if the
furnace has not been used for a year or more.
6.1 Cleaning.
When the furnace is cold wipe exposed metal surfaces with a damp cloth.
6.2 Gas soundness
Check the soundness of all gas joints with a leak detecting fluid (Bullfinch No. 550) and rectify all
leaks before lighting the furnace.
Never search for gas leaks with a naked flame.
6.3 Operation.
Light the furnace in accordance with the operating instructions and ensure that it ignites and
burns correctly.
6.4 Controls.
Check that the furnace valve operates without force and that it always closes off the gas flow
to the burner when it is turned to the closed position.
7. Servicing
Important: Servicing should only be carried out by trained and competent service agents. After
servicing or replacement of any part, check for gas leaks and correct operation before returning
the furnace to the user.
7.1 Burner. To replace the burner assembly:
1 Unscrew the burner assembly from the base of the furnace.
2 Check condition of the burner sealing washer; replace if worn or damaged.
3 Refit new burner assembly No. 1250.
7.2 Gas Jet. To clean or replace the gas jet (size 90):
1 Remove the burner as described in 7.1.
2 Unscrew the jet from the burner base and clean or renew.
Note: Jets should only be cleaned with a solvent or compressed air. If they cannot be cleaned
easily they should be renewed. Never poke out a jet orifice; it will damage the jet and affect
the safety and performance of the furnace.
3 Replace the jet into the burner base. Tighten firmly with a screwdriver. Note: The jet cone
makes a metal to metal gas seal inside the burner base. A sealing compound is not required.
4 Refit the burner as in 7.1.
7.3 Connecting Tube Assembly. To replace the Connecting Tube assembly:
1 Disconnect the hose assembly from the furnace inlet connection.
