Robertshaw Pilot Generator 750 Millivolt 1951-536

The Robertshaw 1951-536 is a 750 millivolt pilot generator for self powered gas control systems.

The 750 millivolt figure is the nominal open circuit output of a healthy pilot generator in a proper pilot flame, and it is the reference against which a generator's condition is judged.

Interpreting the measurement requires understanding what each reading indicates. Open circuit output near 750 millivolts confirms the generator and the pilot flame are producing what they should. Output under load, with the gas valve energised and drawing, will be substantially lower, and the manufacturer's minimum for the valve is the figure that matters, since a system that cannot hold the valve open under load will not work regardless of its open circuit reading.

A generator producing good open circuit voltage but collapsing under load is the classic signature of a thermopile approaching failure, and it produces an appliance that works intermittently in a way that resists diagnosis if only open circuit voltage is measured.

Low readings across both measurements point first at the pilot flame rather than the generator: a blocked orifice, a dirty burner, or incorrect gas pressure will starve a perfectly serviceable generator.

Applications include millivolt unit heaters, wall heaters, fireplaces, pool heaters, and standing pilot appliances.

Brand

Robertshaw

SKU

1951-536

Category

Pilot Generators

Weight

0.35 lbs

Dimensions

32.00" x 1.20" x 0.80"

Price

$51.00

Availability

In stock

Rating

0 / 5.0