HAMWORTHY HEATING LTD
22
FLEET H series
500001216/D
High Fire Target
Nat Gas - 9.2% ±0.25% CO
2
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.
Figure 7.6.1- Adjusting gas valve throttle
Low Fire Target
Nat Gas 10.0% ±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 7.6.3 - Adjusting gas valve offset
Models - F175H - F350H
4. If combustion is outside of the ranges defined below the factory sealed valves may be adjusted using
the following procedure .
Models - F175H- F350H
Fig 7.6.1 - Combustion settings
5. Energise electrical supply and start the boiler module. The burner will ignite and run at 100% modulation.
6. Monitor the combustion readings on the combustion analyser at both Maximum and Minimum firing rates - refer
to section 8.2.8.2 - Controller Stop function
*
Figure must not exceed 100ppm under normal operating conditions.
If combustion readings fall within the required range the boiler module is set and operating correctly. If the
combustion readings fall outside the required range the burner settings will require adjustment.
CONTACT HAMWORTHY HEATING TECHNICAL DEPARTMENT FOR FURTHER DETAILS
7. Shut down the boiler and isolate from the electrical supply. Remove instrumentation and replace test points and plugs.
8. Refer to
section 8.1 - Controls Operation,
to adjust the relevant boiler settings specific to the installation
7.7 Setting the flow rate to achieve 20°C
Δ
T
Before commissioning is complete, the flow rate must be checked and adjusted. A ball valve is located on the boiler return
pipe, prior to the pump, and controls the flow through the boiler. Using the boiler flow and return temperature sensors
