(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
2
), or oxygen (O
2
), level. This procedure is detailed in Section 5.7
Combustion Testing. Badly tuned combustion will lead to reduce the life of the boiler and
invalidate the warranty.
WD440/3/2007
Chapter 4 : Installation
The Keston Qudos 28h & Qudos 28hP Boilers
Installation & Servicing Instructions
Page : 26
