HAMWORTHY HEATING LTD
17
PUREWELL VariHeat he
500001155/F
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 8.5.1
Page 21) to enable the High & Low CO
2
figures to be measured.
2) Remove the sample point plug from the front of the base of the boiler.
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 high & low fire target CO
2
figures, see 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.
10) Tampering with any sealed component may
result in loss of warranty on the appliance.
Flue Gas Sampling Point
Figure 7.4.1 - Removal of Sample Point Plug
Figure 7.4.2 - Combustion Analyser Probe Setting
11) Refer to
section 8.0 - Controls Operation
, to set the relevant boiler parameters and timings specific to the
installation.
7.5 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.
% CO
2
+/- 0.25%
HIGH FIRE
LOW FIRE
PV65he 8.5 8.5
PV85he 9.5 9.0
PV105he 9.0 8.5
PV125he 9.0 9.0
BOILER MODEL
Table of Combustion Settings
