7
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
Thermo cou ple
ON/OFF Pilot K nob
Air Shutt er
ONE SHO T
E.C.O. 190
°
Gas Inlet
11" W.C.
Pressure
JADE CONTROL SYSTEM
Temperature Lever
Pilot Ori c e (inside)
