Furnace Fuel Miser Circuit

Posted on Oct 22, 2012

A timer (LM555CN) and decode counter is used to generate duty cycles from 10% to 100% to control the time a heating system can operate. V2 is a decode counter that can be switched from 10% to 100% duty cycle. V3A and form a latch that drive Al, LED1, and V4. The triac TRI is used as an ac switch, in series with the thermostat that controls the heating system. Electric-heating systems thai do nut contain a low-current thermostat (as in the previous installation), use a heavy-duty thermostat that directly feeds current to the heating element.For such systems, it will be necessary to install a heavy-duty relay (Kl in this example) to control the heavy heating-element current.

Furnace Fuel Miser Circuit
Click here to download the full size of the above Circuit.

Some oil-fired systems use three-wire thermostats to control the operation of the burner motor and ignition system by activating a relay. This is a typical installation for such systems.

Leave Comment

characters left:

New Circuits



Popular Circuits

Fast Battery Tester
Lego Double Rotation Sensor
Hybrid Headphone Amplifier
Analog Simulation Tools Aid Digital-Control-Circuit Designers
temp control fan hardware
ultrasonic circuit diagram
LM1279 110 MHz RGB Video Amplifier System With OSD [Obsolete]
Based LB1948M drive motor control circuit diagram
DTL internal structure of the inverter circuit