750-204
Profire D/LND
3-5
3.5 — Automatic Shutdown
Refer to the manufacturer’s literature on programming controls and burner wiring diagrams for detailed informa-
tion.
1. Begin starting sequence, with burner switch off, and with all manual valves closed. Switch main power on.
2. When firing oil, open the manual oil valves.
3. When firing on gas, open the main manual gas valve.
4. When firing on gas, manually reset the high and low gas pressure switches.
5. Place the gas/oil selector switch in position for the fuel to be used. With all limit and operating controls calling
for heat, the burner will follow the Flame Safeguard Sequence.
6. When the burner motor starts, open the gas cock.
7. If firing on gas, when the main fuel lamp lights indicating pilot flame proven, slowly open the second shutoff
cock downstream of the main gas valve(s).
8. Refer to the manufacturer’s literature on primary control sequence of operations.
3.5 — Automatic Shutdown
When the limit or operating controls open:
• Fuel valves close. The main fuel lamp goes off. Flame safeguard timer starts.
• The flame safeguard timer and burner motor stop. The burner is ready for startup on the next call for heat.
3.6 — Manual Shutdown
1. Turn the gas/oil selector switch “OFF.” The burner shuts down in Automatic Shutdown.
2. When the burner motor stops, close all manual valves.
3.7 — Safety Shutdown
1. If at any time during the operating cycle a flame failure occurs, the burner shuts down as in Automatic Shut-
down, with an additional post-purge, and the flame failure lamp is energized.
•The lockout switch on the flame safeguard control must be manually reset before the burner will fire again.
2. If a low water condition occurs, the burner shuts down as in Automatic Shutdown.
3. If a high or low gas pressure condition occurs while firing on gas, the burner shuts down as in Automatic Shut-
down.
•The condition must be corrected and the respective gas pressure switch manually reset before the burner will
fire again on gas.
To Next Page
Loading...