23
Taking into account a pressure drop from the installa-
tion lines of no more than 1 MB, it can be assumed
that a permissible minimum pressure of 18 MB is
present at the appliance's gas connection (reference
BS 6400-1 Section 6.2, Pressure absorption).
The external gas tap may reduce operating pressure
further if measured at its test point. The pressure drop
is relative to the heat input of the boiler (kW).
Observe minimum gas pressure at the gas fitting in
accordance with the table – see page 41
Electrical connections
Opening the wiring chamber
Fig. 13
!
Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing any work, touch earthed
objects, such as heating or water pipes to dis-
charge static loads.
Installation sequence
Gas connection (cont.)
6167586
Installation
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