Combustion Checks; User Instructions; Figure 7.4.1 Removal Of Sample Point Plug - Hamworthy Purewell VariHeat 65he Installation, Comissioning And Servicing Instructions

7.4 Combustion Checks

The boiler is factory preset, however, where checks need be undertaken during servicing to confirm correct
performance within the installation.
1) Put boiler into service mode (Section 8.2.8.1 Page 29) to enable the High & Low CO
2) Remove the sample point plug from the front of the base of the boiler.
Flue Gas Sampling Point
Figure 7.4.1 - Removal of Sample Point Plug
Figure 7.4.2 - Combustion Analyser Probe Setting
7.5 Refer to section 8.0 - Controls Operation, to set the relevant boiler parameters and timings specific to the
installation.
7.6 User's Instructions
The boiler owner or their representative should be made aware of the lighting and operating instructions.
A practical demonstration should be given describing each functional step. This Installer's Guide and User's
Instructions should then be handed over & kept in a safe place for easy reference.
HAMWORTHY HEATING LTD
Table of Combustion Settings
BOILER MODEL
PV65he
PV85he
PV105he
PV125he
18
PUREWELL VariHeat he
3) Ensure that an insertion distance of 100mm is set on
the combustion analyser probe.
NOTE: THIS DISTANCE MUST BE SET TO ENSURE
ACCURATE ANALYSIS OF THE FLUE GASES.
4) Insert the probe into the base up to the set stop
position .
5) For Low Fire & High Fire Target CO
table below.
6) CO = 0-50ppm: however figure should not exceed
200ppm under normal operating conditions.
7) If the combustion readings fall within the required
range, the boiler is set and operating correctly.
8) Remove the combustion analyser probe & replace
the sample point plug in the front of the base of the
boiler.
9) If the combustion readings fall outside the
required range DO NOT adjust the gas valve
settings .
CONTACT HAMWORTHY HEATING SERVICE
DEPARTMENT.
(Contact details on page 36)
10) Tampering with any sealed component may
result in loss of warranty on the appliance.
% CO +/- 0.25%
2
HIGH FIRE LOW FIRE
8.5 8.5
9.5 9.0
9.0 8.5
9.0 9.0
figures to be measured.
2
figures see
2
500001170/K