Hamworthy Sherborne Series, Installation, Commissioning And Servicing Instructions

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HAMWORTHY HEATING LTD
18
SHERBORNE 500001167/E
7.6 Combustion Checks
The boiler modules are factory pre-set , however, site checks must be undertaken to confirm correct
performance.
1 Use appropriate tool to remove sample point plug.
2 Insert combustion analyser probe horizontally into the sample hole provided in the sump casting.
3 Energise electrical supply & start the boiler. Refer to section 7.3.1.
Note! Care should be exercised if the boiler is firing as the flue can achieve temperatures which can cause injury
if touched.
4 Monitor the combustion readings indicated on the combustion analyser at both Maximum & Minimum firing
rates.
High Fire Target
8.7% CO
2
±0.25%
If combustion level is outside of this range use the Cross
Head Throttle Screw to adjust the mixture.
T
HIS SETTING MUST BE CORRECT BEFORE CONTINUING
To increase the CO
2
level, turn the adjustment anti-
clockwise.
Low Fire Target 8.7% CO
2
±0.25%
If combustion readings are outside target range use Torx
Bit to make adjustments
To increase the CO
2
level, turn the adjustment
clockwise.
CO = 0-50ppm. However the figure must not exceed 200ppm under normal operating conditions.
If combustion readings fall within the required range the boiler module is set & operating correctly. If the
combustion readings fall outside the required range the burner settings will require adjustment.
For LPG Propane firing—see appendix A
CONTACT HAMWORTHY HEATING TECHNICAL DEPARTMENT FOR FURTHER DETAILS
5. Shut down the boiler & isolate from the electrical supply. Remove all instrumentation & replace any test points & plugs.
6. Refer to
section 8.0 - Controls Operation, to set the relevant boiler parameters & timings specific to the installation
7.7 User Instructions.
When the boiler is fully commissioned, the owner or their representative should be made aware of the lighting-up
& operating instructions. A practical demonstration should be given describing each functional step. This
Installation & Commissioning guide, the servicing instructions manual & the user’s instructions should then be
handed over & be kept in a safe place for future reference.
LPG Operation
Nat Gas Operation
0
1000
20 00 3000 4000 5000
0
10
20
30
60
50
40
70
80
Fan speed rpm
In
pu
t (
kW
n
e
tt)