19
Concord CXSD/H -
Installation & Servicing
INSTALLATION
7
6
2
3
4
10
12
Con 1965
5
9
11
to the value given in Table 8. Unscrew the adjuster on the LH
valve until the burner pressure falls then reset it to the value
given in Table 8.
Press the [0/1] button to turn the boiler OFF. Now reset the
Low burner pressure by unscrewing and removing the lower
electrical plug from the LH gas valve and the High/Low plug
from the RH gas valve. Turn the boiler ON and, using a
screwdriver, turn the screw within the spindle on the RH valve
to set the burner pressure to the value given in Table 8.
Refit the electrical plugs, dust cover and plastic cover.
Failure to follow this procedure may result in the burner
pressure being set
but
the 2 gas valve governors
not
being
set properly.
Table 8 Manifold gas pressure settings
24 ADJUSTING THE MANIFOLD PRESSURES: CXSD 100/H-120/H ONLY
1.
Press the [ENTER] button on the fascia panel, then press
either the up or down arrow button until the display shows:
then press [ENTER]. The microprocessor is now in
commissioning mode. Failure to enter the commissioning
mode will result in a fault condition being detected when the
following actions are carried out.
2.
If desired, it is possible to use the onboard commissioning
instructions using the up/down arrow buttons. However the
following paragraphs provide more detailed instructions and
are recommended until the installer is familiar with the
CXSD/H
.
3.
It is ESSENTIAL to adjust the maximum pressure first.
CXSD 100/H boilers
The setting procedure must be done in 2 steps. The location of
the manifold pressure adjusters (11 & 12) on the gas valve is
shown below. Undo the screw holding the lower electrical plug
on the LH gas valve and pull it off. Prise off the plastic cover on
the High/Low solenoid (10) on the RH valve and, using a suitable
spanner, set the burner pressure adjuster (7) to the value given
in Table 8. Refit the electrical plug and secure with the screw.
Remove the dust cover from the adjuster (11) on the LH gas
valve and set the pressure to the value given in Table 8.
Now set the Low burner pressure by unscrewing and removing
the lower electrical plug from the LH gas valve and High/Low
plug from the RH gas valve. Using a screwdriver, turn the screw
(6) within the spindle on the RH valve to set the Low burner
pressure to the value given in Table 8.
Refit the electrical plugs and the dust and plastic covers.
Failure to follow this procedure may result in the correct burner
pressure being set
but
the 2 gas valve governors
not
working
correctly.
CXSD 110H-120H boilers
The setting procedure must be done in 2 steps.
The location of the manifold pressure adjuster on the gas
valve is shown in Frame 23. Remove the dust cover and, using
a screwdriver, screw in the adjuster on the LH gas valve nearly
fully.
Prise off the plastic cover on the High/Low solenoid on the RH
valve and, using a suitable spanner, set the burner pressure
Boiler
RH valve
LH valve
Low rate
adjustment
and Final
pressure
pressure
adjustment
- mbar
- mbar
pressure
- mbar
CXSD/H 100
10.0
10.7
5.2
CXSD/H 110
11.6
11.1
5.4
CXSD/H 120
12.6
12.1
5.9
At the end of the adjustment procedure ensure that all
covers are replaced, disconnect the gas pressure gauge
and replace the blanking screw in the manifold pressure
test point.
Press [EXIT] to leave the commissioning mode and return
to the main menu.
Press [EXIT] again to return to the status displays.
LEGEND
1.
Fascia panel display.
2.
Overheat thermostat reset button.
3.
Main gas inlet cock.
4.
Union.
5.
Gas control valve.
6.
Screw - minimum adjuster (RH valve)
7.
Gas rate adjuster - maximum (RH
valve).
8.
Burner setting pressure test point.
9.
Inlet pressure test point.
10.
High/low solenoid connector.
11.
Manifold pressure
adjuster (LH valve)
12.
Manifold pressure
adjuster (RH valve)
8
INST
ALLA
TION
Содержание Concord CXSD 40/H
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