CLEAN BURN CB-1800 Manuel de l'opérateur télécharger pdf (Page 89)

Operator's Manual: Models CB-3500 & CB-5000

9-5

Cleaning the Check Valve

This procedure applies to furnace installations with inside and outside tanks. The following protective gear

should be worn when cleaning the check valve/screen:

• Rubber gloves

• Safety goggles

1. Refer to Figure 9D. Remove the one-piece suction oil line from the tank.

2. Remove the check valve and lter. Clean these components in a parts washer.

3. Check the operation of the check valve. The valve must seat so it is airtight to hold pump prime.

4. Re-assemble and re-install the components. Apply Permatex #2 non-hardening gasket sealer or

equivalent to the threaded ttings. Firmly tighten all connections so the suction line is 100%

airtight.

5. Follow pump priming instructions in Section 5 to re-establish prime.

Figure 9D - Check Valve Detail

SUCTION

OIL LINE

VENT

CAP

OIL STORAGE TANK

EMERGENCY

VENT

METERING PUMP

CHECK VALVE

CHECK VALVE SCREEN

TO BURNER

FUNNEL WITH

BALL VALVE

CLEANOUT

I88670-F

12"

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CLEAN BURN CB-1800 Manuel de l'opérateur Page 89