Flue Restrictor Adjustment; Control & Pressure Checks; Check Control Settings - Valor Black Beauty Radiant Installer's Manual

6.5 Flue Restrictor Adjustment

See figure 10.
The appliance has an integral adjustable flue draught
restrictor. This is supplied set in the fully open
(unrestricted) position and in most cases no adjustment
should be necessary. It can be reset to a fully restricted
position if the flue draught is excessive. The restrictor
must remain in its fully open position if the flue has
an equivalent height of 4m or less (as calculated in
accordance with BS5440: Part 1 Appendix A) or
where a pre-cast flue is used.
To close the restrictor:
1. Loosen the screw situated behind the cut-out in the
black upper heat shield. Do not fully remove the screw.
2. Push the restrictor firmly down as far as it will go. The top of the slot in the restrictor
bracket should touch the screw.
3. Fully tighten the screw.
There may be certain exceptional circumstances where closing the restrictor causes the
fire to fail the spillage test (See section 9). In such cases the restrictor will have to be
reopened.
7 C O N T R O L & P R E S S U R E C H E C K S

7.1 Check Control Settings

7.1.1 If closed open the isolating valve at the inlet elbow.
,
7.1.2 To check the control positions temporarily place the outer case loosely over the
engine. Fit the control knob over the gas tap spindle.
7.1.3 Depress the control knob and turn anticlockwise partially towards the 1/IGN
position until some resistance is felt. Keep depressed at this position for a few seconds to
purge air from the system then, while keeping it depressed, turn fully to the 1/IGN
position. A spark should be generated at the pilot while turning. The spark should ignite
the pilot. If it does not, keeping the knob depressed, continue to turn the knob
anticlockwise. A second spark should be generated at the pilot while turning. This spark
should ignite the pilot.
7.1.4 When pilot ignition has been achieved, keep the control knob depressed for
approximately ten seconds to allow the thermocouple probe to warm up and then release
it. If the pilot does not remain alight, ensure that the air has been purged, that the pilot
INSTALLER'S GUIDE
Page 15
Figure 10. Flue restrictor
adjustment