Initial Firing; Combustion Testing - Keston Qudos 28s User, Installation And Servicing Instructions

WD420/3/2007

Initial Firing

The gas pressure setting is factory adjusted to within the required range and does
not need readjustment. If the reading is incorrect then check such factors as tightness
of the air and flue pipe joints, pressure sensible joints and the gas inlet pressure
(minimum 18 mbar required for Natural Gas and 31 mbar required for LP gas). If all joints
are sound and the gas inlet pressure is satisfactory set the gas pressure check the gas
input. Full details of this procedure are given in Section 5.9 Timing The Gas Meter.

Combustion Testing

It is advisable on all installations that the combustion quality is checked by measuring the
carbon dioxide (CO
Combustion Testing. Badly tuned combustion will lead to reduce the life of the boiler and
invalidate the warranty.
Installation & Servicing Instructions
Chapter 4 : Installation
), or oxygen (O
2
The Keston Qudos 28s & Qudos 28sP Boilers
), level. This procedure is detailed in Section 5.7
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