Page 29 - Webster Service Manual

24
Two-Pipe Installation
Normally required when lifting oil from below pump. 2 pipe
systems are self-venting. See table below for permissible line
lengths.
Maximum Inlet Vacuum:
Single-stage M units—10” Hg
Two-stage 2M units—15” Hg
1.
Insert BYPASS PLUG, if not installed, through side INLET
PORT in pump body.
2.
Connect supply line to preferred INLET PORT.
3.
Connect return line to preferred RETURN PORT.
4.
Connect nozzle outlet to nozzle line.
5.
Plug all unused ports securely
6.
Start burner. Unit will self vent.