Remeha Selecta
26
5 GAS
CONNECTION
5.1 Gas connection
The appliance is suitable for burning natural gas or LPG (with optional LPG set). The
appliance must be connected in accordance with the current regulations. The gas
connection is 15 mm Ø o/d. Supply pipeworks to be sized in accordance with relevant
regulations to ensure that 2.5 CuM/hr of gas is available at the boiler.
We advise a gas filter be fitted in the gas supply line in order to prevent contamination
of the gas valve.
5.2 Gas pressures
The gas valve is designed to accept an inlet pressure range of between 17 and 30
mbar. With the boiler running at full output there must be a minimum of 20 mbar (for
NG) and 37 mbar (for LG) pressure available at the boiler to ensure correct operation.
All combustion adjustments are made on the gas valve to CO
2
levels.
5.3 Gas/air ratio regulation
The Remeha Selecta is equipped with a factory pre-set gas/air ratio regulator (can be
adjusted by an approved Engineer).
The purpose of this regulator is to keep the gas/air ratio in the burner as optimal as
possible at all times within the modulating range.
This ensures clean and reliable combustion across the entire load range. In addition, it
achieves high part-load efficiency.
