CleaverBrooks CB - Controls Common to Oil Fired Boilers (Including Combination)

750-96 (revised 2010)
Model CB Packaged Boiler Manual
1-11
1.9 — Controls Common to Oil Fired Boilers (including combination)
FIGURE 1-5. Oil Control Valve Assembly: For Heavy Oil
1.9 — Controls Common to Oil Fired Boilers (including combination)
The following items are applicable to all oil fired or gas and oil fired boilers. Additional controls for No. 4, 5, or 6
oil are listed in Section 1.10.
Control Description
1. Oil Drawer Switch Opens the limit circuit if the oil drawer burner gun is not latched in the forward position,
which is required for burning oil.
2. Atomizing air Proving
Switch
Pressure actuated switch whose contacts are closed when sufficient atomizing air pres-
sure from the air pump is present for oil firing. Oil valve(s) will not open or will not remain
open unless switch contacts are closed.
3. Air Pump Module This assembly provides the compressed air required to atomize the fuel oil for proper
combustion. It is started automatically by the programmer’s sequence.
4. Air Pump Motor This motor drives the air pump and an air cooling fan. The motor is started and stopped
simultaneously with the forced draft fan motor.
5. Air Pump Provides air for atomization of fuel oil.
6. Air Filter An oil bath type strainer to clean the air supply prior to entering the air pump.
7. Check Valve Prevents lubricating oil and compressed air from surging back through the pump and air
filter when the pump stops.
8. Air-Oil Receiver Tank Holds supply of oil for lubricating the air pump. Separates lube oil from atomizing air
before delivery to the nozzle.