Combined humidistat and electronic air flow responsive switch

Details Combined humidistat and electronic air flow responsive switch Combined humidistat and electronic air flow responsive switch

1982-04-22

1983-05-10

Wayner, William E.

Stoves and furnaces

Hot-air furnaces

Air moisteners

73204, 236 44A, F24F 314, G01F 168

Patent

active

043824331

ABSTRACT:
An electronic air flow responsive switch is connected in circuit with a humidistat switch for controlling operation of a humidifier in a forced air heating system. The air flow responsive switch includes a self-heating PTC (positive temperature coefficient) thermistor which enables operation of the humidifier only when the humidistat switch is closed and there exists sufficient air flow for cooling the thermistor. The air flow responsive switch and humidistat switch are mounted in a single enclosure and include plug and cord arrangements for simplifying installation of the device.

REFERENCES:
patent: 3193641 (1965-07-01), Krueger
patent: 3989486 (1976-11-01), Baysinger
patent: 4264961 (1981-04-01), Nishimura et al.
Honeywell Installation Instructions for H49X1024, Form Number 95-6248, Apparent Date 1-64.
Honeywell Document Entitled "Humidifier Controllers", _Form Number 60-2100, Apparent Date 11-75.

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