DE LUXE GAS GRATES / INSTALLATION AND OPERATING INSTRUCTION MANUAL
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8. Preparatory building work if installing the gas grate without the use of a Jetmaster
Universal / IGC built-in or Jetmaster freestanding fireplace
The sides, back and base of fireplace recess within which the gas grate is to be placed must
be constructed of non-combustible materials not less than 200mm thick. No combustible
material must be placed within 200mm of the recess.
The recess must be flued with a flu pipe whose internal dimensions and height are not less than
those required by the size of the Jetmaster Universal / IGC build-in body that the gas grate
would have been placed within, e.g. a Gas Grate 850 requires a flue suitable for a Universal
The recess must be connected to the flue with a tapered collector whose effect is to channel
the gases smoothly into the flue system without impairing the airflow. Angles of less than 45
degrees to the horizontal must be avoided. The surfaces must be smoothed with mortar.
9. Gas Cylinders, Pipe-runs and Sizes
(This work can only be carried out by a person who is registered with SAQCC)
Jetmaster LP Gas Grates should be operated off 48kg (or larger) cylinders. The cylinder must
be positioned outside, as close as possible to the appliance and in any case not further away
than 30 metres and must be away from heat sources, electrical devices, drains, windows and
combustible materials, in accordance with SANS 087 Part 1: 1975. Cylinders must always stand
in the vertical position. For best performance, avoid cold areas and shade. Where the regulator
or outside piping is unavoidably in a position liable to be very cold in winter, it is advisable to lag
these.
Check the Jetmaster Pipe Sizing Chart below to choose the correct size of pipe for the gas grate
size and the length of pipe run. Although Jetmaster supplies 1.5 metres of dia. 8 mm copper
tubing with LP Gas Convectors, it is not necessarily of sufficient size if a larger fire or longer than
4 metre run is to be fitted. Therefore, be sure to fit not less than the minimum size below and
follow the shortest possible route to the gas fire before reducing for entry to the valve. Do not
run more than one gas fire off each supply, without first chec
king the fitter’s supply chart and
installing secondary step-down regulators in cases where the gas supply line is longer than 9
meters and a high pressure regulator is fitted at the gas cylinder.
LP pipe size:
From cylinder and low pressure regulator (28 Mbar) to gas appliance;
Copper tubing (o/d)
8mm
10mm
15mm
Model 700 DS
up to 4m
4 to 15m
4 to 30m
Model 1050
up to 4m
4 to 15m
4 to 30m
Model 1200
up to 4m
4 to 15m
4 to 30m
Model 1500
up to 4m
4 to 15m
4 to 30m
It is a requirement that for any gas supply pipe run greater than 9 metres the system is supplied
and installed with a high pressure regulator at the cylinder / tank and a low pressure secondary
regulator must be fitted, as close to the gas fire as possible.
