Figure 2-20. Burner Assembly
Gas
Valve
Main• |
|
Pressure• | Main• |
Tap | Orifices |
| Manifold |
| Assembly |
Figure 2-21. Gas Valve
Adjustment Screw (5 mm) | Adjustment Screw |
for minimum pressure | (8 mm) for |
setting | maximum |
| pressure |
| setting |
F.Adjusting the Minimum Pressure Setting
1.Disconnect pressure feedback connection (if appcable).
2.Connect a suitable pressure gauge to pipe line or to outlet pressure tap of gas control concerned, to measure burner pressure (measuring point must be as near to burner as possible).
3.Disconnect electrical connection of the Moduplus®.
4.Energize operator, set control in operation and wait until an outlet pressure is recorded on pressure gauge.
5.If minimum rate pressure needs adjustment, use an 8 mm wrench to turn adjustment screw for minimum pressure setting (clockwise to increase or
6.Check if main burner lights easily and reliable at minimum pressure.
7.Reconnect pressure feedback connection (if appcable).
8.Close pressure tap screw.
G. Checkout
After any adjustment, set appliance in operation and observe through a component cycle to ensure that burner system components function correctly.
H.Maintenance
It is recommended to check yearly the minimum and the maximum setting and readjust them if necessary.
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