Gas Supply; Filling The System - Heatline SARGON 18S Installation, Servicing And User Instructions Manual

11. Gas Supply

11.1 The gas supply pipe must be capable of supplying the quantity of gas required
by the boiler (see Technical Data section 2) in addition to the demand of any other gas
appliances being serviced from that supply.
11.2 The internal diameter of the gas supply from the meter to the boiler's gas inlet
connection must not be less than 22mm.
11.3 The meter governor must be capable of delivering a pressure of 20mbar for natural gas
or 37mbar for propane, dependant on the gas being used.
11.4 On fi nal connection of the gas supply to the boiler, the complete gas installation
including the gas meter, must be tested for tightness and purged.

12. Filling The System

12.1 The boiler must not be operated until the system is full of water.
12.2 On completion of the boiler installation and ensuring that all water connections are
correctly made the boiler may be fi lled with water via the fi lling loop (not supplied with
the boiler). Ensure that two manual feed valves and boiler isolation valves are open.
12.3 Release the cover cap on the boiler's automatic air vent, which is located on top
of the internal pump (fi gure 17), and the manual vent on top of the heat exchanger when
fi lling the system.
Figure 17
12.4 The manual feed valves must be closed and the fi lling loop disconnected once
the pressure gauge, sited on the boiler's control panel, indicates a system pressure of 1.5bar.
12.5 Check that all the water connections throughout the system are sound and bleed
each of the heating system's radiators in turn. As air is vented the system pressure may need
topping back up to 1.5bar.
12.6 Air must be vented from the boiler's pump by unscrewing the pump's integral vent plug
and allowing water to bleed for a few seconds. Take care not to allow water to splash
onto any electrical components.
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