Low speed interlock for a two stage two speed furnace

Details Low speed interlock for a two stage two speed furnace Low speed interlock for a two stage two speed furnace

1993-07-12

1995-01-10

Jones, Larry

Stoves and furnaces

Hot-air furnaces

Liquid or gaseous fuel

126116R, 431 62, F24H 300

Patent

active

053797523

ABSTRACT:
A two-stage induced draft furnace is operated at either high heat or low heat with the gas valve switched to high-fire or low-fire. High-fire and low-fire combustion pressure switches sense the collector box flue gas pressure and actuate respective solenoids of the gas valve. Under some conditions the inducer can produce sufficient negative pressure at low fire to prove the high fire pressure switch and cycle the burners on high fire. To prevent this, relay contacts are interposed between the high fire pressure switch and the gas valve solenoid to deny thermostat power to the high-fire solenoid whenever there is a call for low heat.

REFERENCES:
patent: 4688547 (1987-08-01), Bollard et al.
patent: 4729207 (1988-03-01), Dempsey et al.
patent: 4962749 (1990-10-01), Dempsey et al.
patent: 4976459 (1990-12-01), Lynch
patent: 4982721 (1991-01-01), Lynch
patent: 5027789 (1991-07-01), Lynch

Affiliated with

Also associated with

Rating

Low speed interlock for a two stage two speed furnace does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low speed interlock for a two stage two speed furnace, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low speed interlock for a two stage two speed furnace will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-844282