M C Series – Warm air heaters – Installation, Operation and Maintenance Manual
16
Ed.
04/2007
4.
Check that an adequate gas supply and distribution network exists. Specifically, if
the appliance runs on:
Natural gas
the gas mains pressure must be 20 mbar (204 mm H
2
O) with a tolerance from 17
mbar to 25 mbar;
L.P.G. (Propane-Butane mix)
It is essential to fit a first-stage pressure reduction station in proximity to the liquid
gas tank to reduce pressure to 1.5 bar, and a second-stage pressure reduction
station for a further reduction from 1.5 bar a 30 mbar (306 mm H
2
O) in proximity to
the heater (with a tolerance from 20 mbar to 35 mbar);
L.P.G. (pure Propane)
It is essential to fit a first-stage pressure reduction station in proximity to the liquid
gas tank to reduce pressure to 1.5 bar, and a second-stage pressure reduction
station for a further reduction from 1.5 bar a 30 mbar (377 mm H
2
O) in proximity to
the heater (with a tolerance from 25 mbar to 45 mbar).
)
If in doubt regarding the composition of L.P.G. used, follow the indications for a
Propane-Butane mix.
5.
Connect the heater to the gas mains, fitting the gas supply pipe with a shut-off valve
and a three-piece pipe union.