Honeywell RA117A - Manual (Page 8)

STARTUP AND CHECKOUT
WARNING
FIRE HAZARD
CAN CAUSE SEVERE BURNS
Ensure the combustion chamber is free of oil or
oil vapor before starting system.
STEP THE PYROSTAT DETECTOR CONTACTS
The detector contacts are actuated by a friction clutch
that is mounted on a rod connected directly to the heat-
actuated element. Occasionally, this clutch gets "out of
step” after a long period of idleness. To place the clutch and
the contacts “in step,”
1. Remove the cover.
2. Pull the lever forward 1/4 inch (Fig. 8).
3. Slowly release the lever.
4. Replace the cover.
START THE SYSTEM
1. Ensure the Pyrostat detectors are in step.
2. Push in and release the safety switch reset button.
3. Open the hand valve in the oil supply line.
4. Set the limit control and thermostat to call for heat.
5. Close the line switch. The burner should start.
CHECK THE SAFETY FEATURES
Simulate Flame Failure:
1. Follow the starting procedure to turn on the burner.
2. Close the hand valve in the oil supply line.
3.
The RA116A locks out after 75 second (nominal)
safety switch timing. The RA117A and RA817A lock out
after one minute (approximate) scavenging period and 75
second (nominal) safety switch timing.
4. Reset the safety switch and open the hand valve in
the oil supply line.
Simulate Ignition Failure:
1. Follow the starting procedure to turn on the burner,
except do not open the oil supply hand valve.
2. Safety switch locks out after 75 second (nominal)
safety switch timing. Ignition and burner motor stops and
oil valve closes.
3. Reset the safety switch and open the hand valve in
the oil supply line.
Simulate Power Failure:
1. Follow the starting procedure to turn on the burner.
2. With the burner running, trip the circuit breaker or
remove the fuse to turn off power to the system. The burner
should stop.
3. Restore power. The burner should restart.
Check the Scavenger Timing:
1. Follow the starting procedure to turn on the burner.
2. With the burner operating normally, open and im­
mediately close the line switch. The burner should stop
immediately.
3. After recycle timing (one minute approximately), the
burner should restart automatically.
If the system does not operate as described, proceed to
Troubleshooting.
FIG. 8—STEPPING THE PYROSTAT DETECTOR CON­
TACTS.