6. (SKIP - for Gravity Fed Pumps
w/plenty of fuel) Check for Air Leaks:
Check all fittings from the pump back
to the tank for suction side air leaks
(make sure pipe sealant is used for all
threaded connections). Inspect for
cracked flares, tighten fittings and look
for cracked lines. If you see no
evidence of leaks, try soap and air
pressure test on the suction side lines
by pressurizing at the inlet where the
3/8 inch copper line that leaves the
fire-stop valve at the tank.
Yes - Repair/Replace leaking component(s)
No - Go to Next Component
Tank/Tank
Controls
1. In the tank from which the
metering pump is supplied, is the fuel
pickup submerged into the oil source?
Yes - Go to Next Action/Question
No - Fill Tank
2. Is there continuity across the wires
for the Low Level Cutoff Switch?
Yes - Go to Next Action/Question
No - Replace Switch
3. Check wire connections from
Switch to thermostat plug on primary
control. Are all connections properly
secured?
Yes - Go to Next Component
No - Repair connections
68
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