Setting High And Low Flame Pressure - Beech ovens REC Series Installation And Operation Manual

Beech Ovens
RND-REC-RGO Manual (R1)
The calibration procedure is identical for Propane and Natural gas systems, though the
reader must refer to the General Technical Details chart for adjusted pressure
requirements.
Note: This calibration procedure should be carried out by an experienced gas
technician and is performed in situ with the system fully operational.
It is very important to follow these instructions to set up the Combination Gas valve to
achieve maximum performance. Each installation will vary and although the factory
setting will produce a flame, it is necessary to fine tune the valve settings. This is
standard practice for most gas appliances on installation.
For ovens using Natural Gas, the burner will (in most cases) have been jetted at the
factory to produce 80MJ with a supply pressure (outlet pressure) of 1kPa. (Refer to data
plate inside the Gas control cabinet for oven specific details.) This is the High Flame
setting. The Low Flame setting is set to a lower pressure after the High Flame setting
has been adjusted. When this has been done it is necessary to re-check the High Flame
setting.
Before going further, you should familiarize yourself with the Sit Nova 826 Combination
Gas valve to be aware of the location of the test and adjustment points.
(Refer to the identification diagram above.)

Setting High and Low Flame Pressure

Before calibration, check that all other kitchen appliances connected to the main Gas
supply line are running at maximum capacity. If flame calibration of the oven is done
independently of other appliances being in use, the following steps will need to be
repeated when these appliances are running to ensure the main Gas supply is capable
of the supplying the required flow.
To begin adjustment, the main Gas supply pressure should first be checked on the inlet
side of the valve to confirm that sufficient pressure is being supplied.
The screw for the Inlet (supply) pressure test point (4 in above diagram) can be
removed and an appropriate fitting or hose used to connect to the test gauge. This
should confirm supply pressure in excess of the required pressure of 2.0kPa for Natural
Gas and 2.75kPa for Propane Gas. Should supply pressure fall below these levels, gas
supply to the kitchen will need to be improved.
Note: Supply pressure above 5.0kPa will damage the valve. If supply pressure
is above 5.0kPa, a pressure regulator must be installed.
Replace the inlet pressure test point screw and tighten to 2.5Nm.
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Confidential and Proprietary
28/07/2011 (C)