Technical data

30
remeha W40/60-m ECO
9. INSTALLATION INSTRUCTIONS FOR THE GAS INSTALLER
9.1 Gas connection
The boiler is suitable for firing on natural gas and
propane.
Category II
2H 3P
.
Connect the boiler to the incoming gas in accordance
with the requirements of the Gas supply company. Install
the main gas cock near the boiler. The gas connection is
located at the bottom of the boiler (see fig. 6, para. 6.1,
item 29) . Fit a gas filter in the gas supply piping to avoid
fouling of the gas control unit.
9.2 Gas pressures
The required initial inlet pressure is 17-30 mbar. The
burner pressure has been factory-set but must be
checked and re-adjusted to site conditions by an
approved engineer. Consult our Technical Sales Depart-
ment for other types of natural gas.
9.3 Gas/air ratio control
The boiler is equipped with a gas/air ratio control.
The purpose of this control is to keep the ratio between
gas and air quantities in the burner within safe limits, at
varying loads. This ensures clean and reliable combus-
tion over the entire load range.
The air flow is controlled by the differential pressure
across the fan.
The gas flow will be adjusted proportionally according to
changes in the air flow.
The ratio between gas and air flow can be adjusted to
suit the installation (see para. 10.1) .