CLEAN BURN CB-1400, Operator'S Manual

Page: 60 / 108

Operator's Manual: Model CB-1400
5-6
Vacuum Testing the Oil Pump
Vacuum testing the oil pump is a very accurate way to determine the following:
• The condition of the pump -- the ability of the pump to pull a vacuum and suck oil from the tank.
• The condition of the fittings, gaskets and seals from the ball valve to the pump -- these
components must all be airtight to avoid suction leaks.
The following procedure provides instructions for vacuum testing the pump and canister filter on
systems equipped with a ball valve.
ATTENTION: For the pump to pull and hold vacuum, it is critical that all fittings are airtight. If any of
these fittings are loose, the pump may not pull a vacuum or may lose the vacuum rapidly. It is also
critical that all fittings in the suction line, including fittings on the canister filter, are 100% airtight.
1. Follow the instructions to prime the pump (previous procedure).
NOTE: The pump will not pull a vacuum if the pump is dry. There must be oil in the gears of
the pump before the pump can pull a vacuum.
2. With the pump running, open the bleeder two to three full turns, and make sure that oil is flowing
from the bleeder. DO NOT close the bleeder yet.
3. Refer to Figure 5C. Close the ball valve and observe the vacuum gauge.
NOTE: The ball valve must have a stainless steel ball and should be pressure tested by the
manufacturer to ensure that it does not leak. If the ball valve leaks, the vacuum test will not be
accurate.
Priming the Metering Pump (continued)
8. Run the pump until a solid stream of oil flows from the pump bleeder. This will bleed all air out
of the suction line, oil filter and pump head.
ATTENTION: For the metering pump to operate correctly, it is very important that the system
is entirely full of oil and all air is bled out. The burner will shut down if there is any air in the
system.
9. Close and tighten the bleeder on the pump.
10. Remove the jumper wire from the primary control; the burner and pump should stop.
11. Disconnect the pressure oil line from the burner, and position a container to catch oil which will
flow from the pressure oil line during pump priming.
12. Reset the primary control; the burner should start running. Within ten seconds , jump the "F"
terminals by connecting the jumper wire to the other "F" terminal. This will start the pump again
and allow the oil line to flush out.
13. Run the oil pump until the proper flow of oil has been established, and the oil line has been
completely flushed out.
14. Remove the jumper wire from the primary control; the burner and pump should stop.
15. Re-connect the oil line to the connector block.
16. Make sure that the cad cell wires are connected to the "F" terminals as illustrated in Figure 5D,
Step 3. Save the jumper wire for future pump priming.