Monitoring device

Claim 2

A monitoring device for use with large commercial and industrial gas, oil, and combination gas-oil burners and burnerboiler units and their associated combustion control devices (hereinafter referred to generally as ''''equipment'''') to continuously monitor and indicate not only the normal operation of such equipment, but also to discretely indicate for troubleshooting purposes when, where and why a failure or malfunction of such equipment occurred; said monitoring device comprising: controls telltale means to indicate when lighted a call for heat and when out either no call for heat or a malfunction in the combustion control series circuit of such equipment; pilot telltale means to indicate failure in the trial for pilot flame; fuel telltale means to indicate failure in the main flame or detection thereof; low-fire telltale means to indicate the flame control sequence of such equipment calling for low-fire; high-fire telltale means to indicate the flame control sequence of such equipment calling for high-fire; main fuel valve means to establish power paths from said controls telltale means, one of said power paths being established as an independent, holding power path, the other power path being dependent upon said main fuel valve means for its maintenance, to indicate by said fuel telltale means flame failure after opening of the main fuel valve of said equipment and to stop the high-low fire or modulating motor of such equipMent somewhere in its low-fire position, between its low to high-fire position or in its highfire position to indicate where and when such failure occurred.

Claim 3

A monitoring device in accordance with claim 1, wherein said controls telltale means comprises a first connector, a controls telltale and a power path from said first connector to said controls telltale, wherein said equipment has a combustion controls series circuit calling for heat, wherein said combustion controls series circuit has limit switches, wherein said first connector is the last connection in series with said limit switches of said combustion control series circuit calling for heat wired into said circuit and wherein said controls telltale is lighted when said combustion controls call for heat thereby applying electric power to said connector.

Claim 4

A monitoring device in accordance with claim 1, wherein said controls telltale means comprises a first connector, a controls telltale, a power path from said first connector to said controls telltale, a first set of normally open contacts of a first relay, a first relay coil, a first set of normally open contacts of a second relay, a second relay coil, wherein said main fuel valve means comprises a seventh connector, a power path from said seventh connector to said second relay coil, wherein said equipment has a combustion controls series circuit calling for heat, wherein said combustion controls series circuit has limit switches, wherein said first connector is the last connection in series with said limit switches of said combustion control series circuit wired into said circuit and wherein said controls telltale is lighted when said combustion controls call for heat thereby applying electric power to said first connector, wherein said seventh connector is wired to the main fuel valve contact on the combustion control device of such equipment such that when the main fuel valve opens the circuit to said seventh connector is closed and electric power is applied to said seventh connector energizing said second relay coil to close said first set of second relay contacts to establish a power path from said first connector dependent upon the continued energization of said second relay coil thereby establishing a power path to and energizing said first relay coil to close said first set of normally open first relay contacts thereby establishing an independent power path from said first connector to said first relay coil holding said first relay coil energized independent of continued energization of said second relay coil.

Claim 5

A monitoring device in accordance with claim 1, wherein said pilot telltale means comprises a fourth connector, normally closed contacts of a first relay and a pilot telltale, wherein said combustion control device has a safety lockout, wherein said fourth connector is wired to said safety lockout on said combustion control device and electric power is applied to said fourth connector lighting said pilot telltale when said safety lockout is activated stopping the burner.

Claim 6

A monitoring device in accordance with claim 3, wherein said fuel telltale means comprises a fourth connector, a second set of normally open first relay contacts and a fuel telltale, wherein said combustion control device has a safety lockout, wherein said fourth connector is wired to said safety lockout on said combustion control device and electric power is applied to said fourth connector when said safety lockout is activated stopping the burner, and wherein said fuel telltale is lighted when said first relay coil is energized closing said second set of normally open first relay contacts.

Claim 7

A monitoring device in accordance with claim 3, wherein is further provided a fifth connector, a sixth connector, normally closed contacts of said first relay and a second set or normally open contacts of said second relay, wherein said fifth connector is wired to the main power supply, wherein said equipment has a fire regulating transformer, wherein said sixth connector is wiRed to one leg of said fire regulating transformer, wherein a power path for said transformer is established from said fifth connector to said sixth connector through said normally closed contacts of said first relay or through closing of said second set of normally open second relay contacts, and wherein when power is applied to said first connector while power is no longer being applied to said seventh connector upon closing of said main fuel valve, said normally open first relay contacts will be maintained open by said first relay coil being energized and said second set of normally open second relay contacts will be opened by deenergization of said second relay coil thereby establishing an open circuit in the power path from said fifth and sixth connectors to said transformer to thereby stop said high-low fire or modulating motor somewhere in its low-fire position, between its low- to high-fire position or in its high-fire position.

Claim 8

A monitoring device in accordance with claim 1, wherein said low-fire telltale means comprises an eleventh connector, a set of normally closed contacts of a third relay, a low-fire telltale and a power path from said eleventh connector to said low-fire telltale, wherein said equipment has a combustion controls series circuit calling for heat, wherein said combustion controls series circuit has limit switches, wherein said eleventh connector is the last connection in series with said limit switches of said combustion controls series circuit calling for heat wired into said circuit and wherein electric power is applied to said eleventh connector so long as the main switch of the combustion control device is closed, thereby applying electric power to said eleventh connector and lighting said low-fire telltale.

Claim 9

A monitoring device in accordance with claim 1, wherein said high-fire telltale means comprises an eleventh connector, a set of normally open contacts of a third relay, a high-fire telltale, a power path from said eleventh connector to said high-fire telltale, a 12th connector, a relay coil of said third relay and a power path from said 12th connector to said third relay coil, wherein said equipment has a combustion controls series circuit calling for heat, wherein said combustion controls series circuit has limit switches, wherein said eleventh connector is the last connection in series with said limit switches of said combustion controls series circuit calling for heat wired into said circuit and wherein electric power is applied to said eleventh connector so long as the main switch of the combustion control device is closed, wherein said twelfth connector is wired to the normally color-coded red wire of the modulator control used for high-low or modulating fire, wherein electric power, in the normal sequence of change of flame control to high-fire, is applied to said 12th connector thereby energizing said third relay coil to close said set of normally open third relay contacts thereby lighting said high-fire telltale.

Claim 10

A monitoring device in accordance with claim 2, wherein said low-fire telltale means comprises an eleventh connector, a set of normally closed contacts of a third relay, a low-fire telltale and a power path from said eleventh connector to said low-fire telltale, wherein said equipment has a combustion controls series circuit calling for heat, wherein said combustion controls series circuit has limit switches, wherein said eleventh connector is the last connection in series with said limit switches of said combustion controls series circuit calling for heat wired into said circuit and wherein electric power is applied to said eleventh connector so long as the main switch of the combustion control device is closed, thereby applying electric power to said eleventh connector and lighting said low-fire telltale.

Claim 11

A monitoring device in accordance with claim 2, wherein said high-fire telltale means comprises an eleventh connector, a set of normally open contacts of a third relay, a high-fire teLltale, a power path from said eleventh connector to said high-fire telltale, a twelfth connector, a relay coil of said third relay and a power path from said twelfth connector to said third relay coil, wherein said equipment has a combustion controls series circuit calling for heat, wherein said combustion controls series circuit has limit switches, wherein said eleventh connector is the last connection in series with said limit switches of said combustion controls series circuit calling for heat wired into said circuit and wherein electric power is applied to said eleventh connector so long as the main switch of the combustion control device is closed, wherein said 12th connector is wired to the normally color-coded red wire of the modulator control used for high-low or modulator fire, wherein electric power, in the normal sequence of change of flame control to high-fire, is applied to said 12th connector thereby energizing said third relay coil to close said set of normally open third relay contacts thereby lighting said high-fire telltale.