Chapter 2 Profire V Burner
2-22 750-177
ulator spring. Normal setting is 4” to 6” W.C.
4. Perform a pilot turndown test by reducing the pilot pressure very slowly until the scanner looses sight ofthe flame
and gives a flame lockout, then reset the adjustment to normal level. Note the minimumpressure level.
5. After adjusting the pressure back to normal level, set the programmer to the “RUN” position. Main flamewill come
on and the burner is in the low-fire position.
6. Start and stop the burner several times to ensure proper pilot setting.
STARTUP SEQUENCE
The programming control sequences the operation of all controls and components through the starting,
ignition, firing, and shutdown cycle. The burner and control system are in starting condition when:
• The operating and high limit control (temperature or pressure) are below their cutoff settings
• All power supply switches are closed.
• Power is present at the control panel.
Refer to the controls literature and burner wiring diagrams for detailed information.
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 (if applicable).
5. Place the gas-oil selector switch (if applicable) in position for the desired fuel. 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).
AUTOMATIC SHUTDOWN
Limit or operating controls open:
1. Fuel valves close. Main fuel lamp goes off. Flame safeguard timer starts.
2. Flame safeguard timer and burner motor stop. Burner is ready for startup on the next call for heat.
MANUAL SHUTDOWN
1. Turn selector switch to the off position. The burner shuts down in Automatic Shutdown as above.
2. When the burner motor stops, close all manual valves.
SAFETY SHUTDOWN
If at any time during the operating cycle a flame failure occurs, the burner shuts down as in Automatic
Shutdown, 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.
If a low water condition occurs, the burner shuts down as in Automatic Shutdown.
To Next Page
Loading...
