x
If the module does not read 1.5 micro amps DC in 4 seconds it will lock out.
x
When the ignition module locks out 24 VAC is sent to the buzzer from the alarm
terminal on the module.
x
The gas valve continues to open to 3.5” water column in 6-8 seconds for natural gas
boiler base and 10” W.C. for L.P.
5. The water in the boiler is heated to steam.
x
As steam is generated and pressure builds the air is pushed out through the steamtrap.
x
When steam goes through the steam trap and heats it to 192 degrees it closes.
6. Pressure builds in the boiler to the set point (8 PSI).
x
The operating pressure switch opens and the heat circuit is de-energized.
x
When the pressure drops below the set point the heat circuit is energized and the heat
process begins again.
7. Water continues to fill until the high probe is grounded.
x
When the high probe is grounded the WF terminal on the water level board is de-
energized.
x
The fill solenoid closes until the high probe is ungrounded for 5 seconds.
x
If the water level drops below the high probe for more than 5 seconds the WF terminal
is energized and the water fill circuit begins again.
8. When the unit is turned off, by depressing the red rocker switch,
x
115 VAC is removed from the heat circuit.
x
115 VAC is removed from the drain circuit and the normally open drain valve opens
allowing the unit to drain.
x
115 VAC is sent to the 3-minute timer.
x
The three-minute timer will energize the fill solenoid for 3 minutes while the steamer
drains.
