Apparatus and method for controlling a main fuel valve in a stan

Details Apparatus and method for controlling a main fuel valve in a stan Apparatus and method for controlling a main fuel valve in a stan

1982-09-30

1985-05-14

Scott, Samuel

Combustion

Timer, programmer, retarder or condition responsive control

With test circuit checking or analyzing flame sensing...

431 25, F23Q 2300

Patent

active

045169306

ABSTRACT:
A control apparatus for repetitively verifying the integrity of a main fuel valve control circuit in a standing pilot burner system includes a probe circuit adapted to receive an electrical signal representative of the presence of a standing pilot flame and a first circuit which coacts with the probe circuit for energizing a first relay in response to the electrical signal. A second circuit is adapted to receive a heat demand signal and coacts with the first circuit for sequentially disabling the probe circuit, de-energizing the first relay, energizing a second relay, re-enabling the probe circuit and re-energizing the first relay to actuate a main fuel valve.

REFERENCES:
patent: 2231420 (1941-02-01), Gille
patent: 2537293 (1951-01-01), Peterson
patent: 2640920 (1953-06-01), Cairns
patent: 2751972 (1956-06-01), Loeber
patent: 3482922 (1969-12-01), Blackett
patent: 4168949 (1979-09-01), Hamelintz et al.
patent: 4382770 (1983-05-01), Pinckaers

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