Systema Eolo 20AE Series - 7 Gas Pipes; Connecting the Appliance

Gas airtight suspended warm air heaters - EOLO
32
SYSTEMA S.p.A.
Rev. 10EE0112
7 GAS PIPES
7.1 Connecting the appliance
The gas supply pipe must be executed in compliance with the regulations in force in the country in
which the system is installed.
The sizes of the pipes and any pressure reducers must guarantee correct operation of appliances.
Materials used must conform to regulations in force in the country in which the system is installed.
a) The appliance must not be subjected to pressures exceeding 40 mbar (0.04 bar); otherwise the
membrane of the gas valve may break.
b) For natural gas: on the main line upstream, below the meter, always install a pressure stabiliser and
a gauge with a scale of 0÷60 mbar (0.06 bar) and adjust the pressure to 20 mbar (0.02 bar); higher
pressure can be the cause of bad combustion and difficulty in flame ignition.
c) For LPG (butane-propane) gas: a stage 1 pressure reducer must be installed near the tank in
order to reduce the pressure to 1.5 bar; on the main outside line beside the building always install
a stage 2 pressure reducer to reduce the pressure to the values indicated in the table on page 39.
Below the stage 2 reducer install a gauge with a scale of 0÷60 mbar (0.06 bar) and adjust the
pressure to the values indicated in the table on page 39; higher pressure can be the cause of poor
combustion and difficulty in flame ignition.
d) Upstream and downstream of the main gas supply line a gauge must be installed in a visible
position with a scale of 0÷60 mbar (0.06 bar) to check any differences upstream and downstream,
thus checking the flow rate of the entire mains.
e) Moreover, by closing the main gate valve and switching off all the appliances, the seal of the
system and gas valves can be checked by determining whether after a short period there is any
reduction in pressure on the gauges.
f) Always connect appliances using ball valve and anti-vibrating flexible joint for gas.
g) Adjusting the gas supply pressure: all appliances are inspected and regulated in the factory for the
pressures for which they are predisposed (see ratings plate on the burner or table on page 39).
IMPORTANT
For natural gas supply with pressures above 20 mbar (200 mm c.a.), always fit a pressure
stabiliser for each appliance and adjust the pressure to 20 mbar.