BOFI XLT TS Series, Руководство по обслуживанию

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XLT TS Series Service Manual
9
It is sometimes necessary to check the pilot gas pressure, especially for propane
ovens. In order to do this, remove the pilot line between the combination gas valve and
the burner. Loosen the fittings on each end of the pilot line (see Figure 2). Install a
pressure tap tee in the pilot line. This can be a permanent fitting with a removable cap on
the center port of the tee, or temporary rubber hose sections with a barbed tee. Attach a
manometer to the center port of the tee to monitor the pilot pressure. Remove the main
gas valve fuse from the control panel. This will cause the oven to fire only the pilot
circuit. Turn the oven on and adjust the pilot pressure by turning the pilot pressure
adjustment screw (see Figure 1) clockwise to reduce pressure. Conversely turning the
screw counterclockwise will increase the pressure. Adjust to 5-7" for natural gas or 8-10"
water column for propane. Also, if available, use a micro-amp meter to check the current
(2.0 micro-amps min.) in the flame sensor circuit. The flame inspection window can be
used to visually see the pilot light presence and color. At minimal pressure the flame will
be small or non-existent (out). Too much pressure, and the flame will be large and
yellow. Typically, the screw is turned in clockwise until the flame almost disappears and
then backed out slightly counterclockwise until the flame is blue and substantial.
When finished with the pilot pressure adjustment, remove the hoses, then cap or
remove the tee, and finally check for gas leaks with a soapy water solution. Use a mix of
2/3 liquid soap and 1/3 water. A small brush can be used to paint the joints with this
soapy mixture. An electronic leak detector can also be used instead. Be sure to replace
the main gas valve fuse and the pressure adjustment screw cover cap(s) on the gas valve.
Figure 2: Gas Train Assembly & Burner