39
32
e)
T
urn the control knob back to normal operation mode and within
3 seconds back to 'service mode'. The fan speed will now
increase to maximum rate.
f)
Check that the CO
2
reading is within the required values shown
below in the table. If it is outside the required values adjust the
CO
2
by turning the max throttle adjuster as follows:-
Anti-clockwise to incr
ease CO
2
Clockwise to decr
ease CO
2
g)
Once the CO
2
is stable turn the control knob back to normal
operation mode and within 3 seconds back to 'service mode'.
The fan speed will now reduce to minimum rate.
h)
Check the minimum rate CO
2
reading is within the limits
specified in the table below. If not within the limits please call
Halstead Boilers Ltd. Service help line: 01926 834834.
i)
Set and seal adjustment scr
ew.
40
Combustion Set up table
Club HE 18
CO
2
value (min CH input) (Case off)
8.3% – 8.9%
CO
2
value (max CH input) (Case off)
8.9% – 9.1%
X (measured from valve body
4.3mm
to top of screw) (nominal)
If the gas control valve is changed, then when the
appliance is running, the flue gas CO
2
should be
measured, refer to section 6.1, and compared to the
values stated section 2.3. If the measured value does
not correspond to the Performance Data, then contact:
Halstead Boilers Ltd. Service Help line: 01926 834834.
Always seal the gas valve adjustment screw with paint
after adjustment
9.4
FAN
Refer to Figur
es 38 and 41
a)
Ensur
e supply voltage is isolated, and that the gas supply is
isolated.
b)
Remove the gas contr
ol valve, fan & burner assembly; refer to
section 6.2.
c)
Remove the gas contr
ol valve; refer to section 9.3.
d)
Unscr
ew the three screws holding the gas valve mounting
plate, remove plate; refer to Figure 38.
e)
Unscr
ew the four screws holding the fan to the burner
manifold, and remove fan; refer to Figure 41.
f)
Attach and secur
e the replacement fan, replace the gasket.
g)
Re-assemble in r
everse order; ensure that all joints and seals
are correctly re-fitted.
41
THROTTLE ADJUSTMENT TOOL
