HAMWORTHY HEATING LTD. PUREWELL PERMANENT IGNITION 500001090/B
31
11.5.2 Combustion Checks
A flue gas sampling point is provided in the front
boiler casing (see Figure No. 10). To check
combustion take a flue gas sample from each
module test point and for reference CO
2
measurements should be between 8.0% and 11.5%
or 9.0 to 4.0% O
2
(dependant upon model). Normal
CO levels should not exceed 200ppm.
NOTE:
All the above measurements refer to
dry
flue gas
samples.
Gas Pressure Switch Location
230V ~ 50Hz
35W MAX.
HAMWORTHY HEATING LIMITED
PUREWELL PERMANENT IGNITON
BOILER CONTROL PANEL
I
II
Key:
I - Gas Pressure Switch
II - Main Gas Valves
For electrical connections to the Low Gas Pressure
Switch, see Figure 12.
Gas Pressure Switch Adjustment
With the cover removed, turn the M3 nut clockwise
to increase the set point and vice-versa. Seal the
adjuster after setting.
15.0 RECOMMENDED SPARES
MECHANICAL ITEMS
PART No.
Pilot Injector - Propane....................... 331101850
(marked 0.23P)
Low Gas Pressure Switch................... 339009477