CLEAN BURN CB 140, Operator'S Manual

Page: 68 / 142

Operator's Manual: Models CB-1750, CB-2500 & CB-3250
5-2
Priming the Metering Pump
Figure 5A - Priming the Metering Pump
ATTENTION: The priming process must be done precisely as described in this procedure to ensure that all
air is thoroughly bled from the system. Failure to bleed all air from the system will result in
repeated burner shutdowns on reset.
1. Refer to Figure 5A.
2. Remove the 1/4" NPT plug from the side of the pump head, and set it aside.
3. Remove the 1/2" brass cap from the 1/2" brass nipple. Place a funnel in the opening. Slowly
pour used oil into the funnel until oil comes out of the side of the pump head; this will fill the
oil line, canister filter, and pump head with oil.
ATTENTION:
NEVER run the pump head dry (i.e. without oil in the pump head); doing so will
severely damage the pump.
4. Apply Permatex #2 non-hardening gasket sealer to the threads of the plug (removed from the
pump head). Re-install the plug and tighten.
5. Apply Permatex #2 non-hardening gasket sealer to the threads of the 1/2" brass nipple. Re-install
the 1/2" brass cap on the brass nipple and tighten.
6. Open the bleeder valve on the pump two to three (2-3) full turns, and position a container to catch oil
which will flow from the bleeder during pump priming.
7. Close the mini ball valve at the outlet port of the pump head.
ATTENTION:
Verify that the relief oil line is installed back to the tank before closing the mini ball
valve. Closing the mini ball valve will cause the internal pump relief valve to open.
I88756-C
SUCTION
LINE
RETURN TO TANK
TO TANK
CANISTER
FILTER
VACUUM GAUGE
PUMP
TO BURNER
GEARMOTOR
1/2" BRASS
1/2" BRASS
BLEEDER VALVE
NIPPLE
CAP
1/4" PLUG
MINI BALL
VALVE
BALL VALVE