Honeywell r7284 - Fuel Line Connections and Safety

KNA Burner Manual 9.801-300.0 rev. 8/13
9
Section: Prepare the Burner
Connect Fuel Lines
Connect Fuel Lines
WARNING
Oil Leak and Fire Hazard
Install the oil tank following applicable standards
in the U.S. by referring to the latest edition of NFPA
31 or CSA-B139 & CSA-B140 in Canada, and all
authorities having jurisdiction
CAUTION
Do Not Use Teflon Tape
Damage to the pump could cause impaired burner
operation, oil leakage and appliance soot-up.
• Never use Teflon tape on fuel oil fittings.
• Tape fragments can lodge in fuel line compo-
nents and fuel unit, damaging the equipment
and preventing proper operation.
• Use oil-resistant pipe sealant compounds.
NOTICE
To determine the proper fuel line
size, refer to the fuel pump manu-
facturer's instructions provided with the burner. Refer
to Figure 5 or Figure 6 for typical installation layouts.
The burner is supplied with a single stage fuel pump.
Consult the instruction sheet provided with the pump
for installation specifications.
When installing a one-pipe system, connect the inlet
line to the pump inlet. The fuel pump may be installed
with gravity feed or lift. The maximum allowable lift for
a single pipe installation is 8 ft.
When installing a two-pipe system, remove the 1/16"
pipe bypass plug from plastic bag attached to fuel unit.
Remove the 1/4" plug from the return port. Insert and
tighten the bypass plug. Attach return and inlet lines.
The return line should terminate approximately 3 to 4"
above supply line inlet. Failure to do this may introduce
air into the system and could result in loss of prime.
Fuel Line Installation
Route the fuel line to the inlet port of the fuel pump.
Use 1/4" ID copper tubing or flexible hose compatible
with fuel oil.
Always install fittings and fuel lines in an accessible
location and so they do not rub against sharp panels
or objects.
Fuel Line Valves and Filter
WARNING
Do Not Install By-pass
Plug with 1-Pipe System
Failure to comply could cause immediate pump
seal failure, pressurized oil leakage and the poten-
tial for a fire and injury hazard.
The burner is shipped without the by-pass plug in-
stalled.
Install the by-pass plug in two-pipe oil supply systems
O N LY.
CAUTION
Oil Supply Pressure
Control Required
Damage to the filter or pump seals could cause oil
leakage and a fire hazard.
• When installing a fuel supply tank above the
burner, the oil supply inlet pressure cannot exceed
3 psig.
• Insure that a pressure limiting device is installed
in accordance with the latest edition of NFPA 31.
• Do NOT install valves in the return line.
Install a high quality, oil duty rated, fusible handle
design shutoff valve on the oil supply line close to the
fuel tank to provide easy access to the inline fuel filter.
Install a fuel oil filter between the fuel pump and oil tank
with a filtration rating of 50 microns or less.
Fuel Supply Level With Or Above Burner
The burner may be equipped with a single-stage fuel
unit for these installations. Connect the fuel supply to
the burner with a single supply line if you want a one-
pipe system (making sure bypass plug is NOT installed
in the fuel unit.) Manual bleeding of the fuel unit is
required on initial start-up. If connecting a two-pipe fuel
supply, install the fuel unit bypass plug.