9
Pilot Sequence of Operation
PILOT OPERATION
• Gas Pressure 11˝ W.C. to control is necessary. Set with two gas appliances running.
• Gas Control supplies gas to pilot orifice when control ON/OFF pilot knob is held at pilot position.
• Pilot Orifice meters gas to heat thermocouple. Flame should be high enough to engulf the
thermocouple.
• Thermocouple generates millivoltage to the gas control’s magnet assembly.
• Magnet when it receives 12 millivolts or more it allows gas to flow freely to pilot without
holding pilot knob.
• E.C.O. passes millivolts through the gas control and back to thermocouple. Trips
permanently open if water temperature exceeds 190°F.
MAIN BURNER OPERATION
• Gas Control supplies gas to main burner when control knob is set to “ON” position and the
temperature lever is set to desired temperature after pilot is lit.
• Main Burner Orifice meters gas through burner tube.
• Main Burner pilot ignites gas when it reaches end of this tube. Flame height adjusted by sliding air
shutter. Ideal setting is 1/4 way open (.20˝). Flame should be primarily blue with
a trace of yellow.
• Temperature Knob setting of knob determines burner cycle and water temperature. Temperature range is
70°F - 140°F.
Pilot Flame
Thermocouple
ON/OFF Pilot Knob
Air Shutter
ONE SHOT
E.C.O. 190°
Gas Inlet
11" W.C.
Pressure
JADE CONTROL SYSTEM
Temperature Lever
Pilot Orifice (inside)