Form #44201150
-28- Sept
2010
i.
This appliance is equipped with a step-opening, combination gas valve. The maximum supply pressure to the
appliance is 60 mbar. If the line pressure is more than the maximum supply pressure, then a second stage
regulator which corresponds to the supply pressure must be used.
j.
After all gas connections have been made, make sure the heater and all gas outlets are turned off before
the main gas supply is turned on slowly. Turn the gas supply pressure on and check for leaks.
k.
If a 2nd stage regulator is used, the ball valve down stream in the supply line must be closed when purging
the gas lines to prevent gas seeping through it. If initial gas pressure is higher than 60 mbar the redundant
combination gas valve is designed to lock out. Pressure build-up in the supply lines prior to the heater must
be released before proper heater operation.
Do not use an open flame of any kind to test for leaks.
KEY DIMENSIONS AND COMPONENTS OF THE GAS CONNECTIONS
36 to 43cm
Approved
Flexible Connector
Second Stage Regulator with
Vent Leak Limiter to reduce the
Supply Pressure below 60mbar if required
Gas Supply
Piping
Sediment Trap
(Drip Leg)
Manual Gas
Shut Off Valve
5cm Max.
Displacement
Fig. 28
END VIEW
Control Box
SIDE VIEW
Movement
Alternate Supply
Locations
Adaptor R - 1/2 female
Adaptor R - 1/2 male
Fig. 29
INCORRECT POSITIONS
Movement
WRONG
Movement
WRONG
Movement
WRONG
Movement
WRONG
Fig. 30
Radiant tube heaters will expand and contract during operation. Therefore it is essential to provide a
flexible metallic hose, which must conform, to national or Local Regulations, to connect the appliance to
the gas supply. Minimum size to be ½" (12.7mm) bore.
The gas pipe, flexible hose and connections must be self supporting. The gas pipe work must not bear
any of the weight of the heater or any other suspended assembly.
