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Section 6 - Fuel Supply Pump/Piping
General Requirements
1.
Mount the fuel supply pump in a horizontal position (shaft horizontal) near the fuel supply
tank.
2.
The standard oil pump has a maximum suction lift of 14 feet (6 feet for a metering pump).
Suction lift is the length of pipe run from the bottom of the pick-up strainer to the fuel supply
pump. Tall tanks and/or cold fuel may require additional fuel-delivery equipment to properly
supply the heating system.
3.
The fuel pump/motor are intended for indoor use only.
4.
Clean all lines, fittings, and parts internally before assembly.
A small burr or piece of
rust could plug the nozzle. See Section 5 for an illustration of a typical pump and piping
installation.
5.
The fuel pump contains an internal strainer that periodically needs to be cleaned. This internal
strainer is mounted behind the pump cover. Before removing the pump cover make sure you
have a new gasket on hand. Contact the Lanair Customer Service Department for the proper
gasket for your model of pump, at 1-888-370-6531.
6.
Use 1/2” interior diameter (.493) steel pipe, or 1/2” outside diameter copper throughout the
suction supply line and pick up tube. The use of smaller line, rubber, plastic or hydraulic line
is unsafe and will void your warranty.
7.
Use thread sealing compound on all pipe thread connections.
Do Not Use Teflon Tape.
8.
Install the suction line strainer in the suction line. Make sure the suction line strainer is 6” off
the bottom of the tank. The suction line strainer may be mounted horizontally or vertically.
Consider accessibility.
9.
Install the check valve (arrow facing towards the pump) on the bottom of the pick up
tube.
10.
Install a vacuum gauge on the primary strainer assembly. This gauge will indicate when
service is needed on the strainer, pump or connections.
11.
When using a bypass regulator, install a 1/2” inside diameter (.493) steel pipe, or 1/2” outside
diameter copper from the fuel bypass regulator (port marked “T”) to the fuel supply tank. Do
not allow this line to protrude into the tank more than 1”.
The use of smaller line, rubber,
plastic, or hydraulic line is unsafe and will void your warranty.
When
using
the
optional
Metering
Pump
install
a
3/8”
copper
line
from
the
tee
on
the
metering pump assembly to the fuel supply tank. Do not allow this line to submerge below
the level of the oil. The use of smaller line, rubber, plastic, or hydraulic line is unsafe and will
void your warranty.
