Hamworthy Purewell Variheat mk2 110c, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD
18
PUREWELL Variheat mk2 218612 A03
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 (
for more information see Navistem Manual provided—p.g. 114 ) 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 Low Fire & High Fire Target CO
2
figures see
information 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 is outside of the ranges defined
below, the factory sealed valves may be adjusted
using the following procedure :
Flue Gas Sampling Point
Figure 7.4.1 - Removal of Sample Point Plug
Figure 7.4.2 - Combustion Analyser Probe Setting
High Fire Target Nat Gas - 9.5% ±0.25% CO
2
If combustion level is outside of this range adjust the
Throttle Screw on the venturi using either a 4mm
allen key or slotted screwdriver.
T
HIS SETTING MUST BE CORRECT BEFORE CONTINUING
To increase the CO
2
level, turn the adjustment
anti-clockwise.
Figure 7.4.3.1a - Adjusting gas valve throttle
70c
Low Fire Target Nat Gas 9.5% ±0.25% CO
2
If combustion readings are outside target range use
Torx Bit to make adjustments
To increase the CO
2
level, turn the adjustment
clockwise.
Figure 7.4.3.1b —Adjusting gas valve offset
70c