Product Overview

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103859-12 - 8/19
MPO-IQ
Installation & Service Manual
Figure 29: Single Pipe Oil Line
A. GENERAL
1. Use flexible oil line(s) so the burner swing door can
be opened without disconnecting the oil supply
piping.
2. A supply line fuel oil filter is recommended as a
minimum for all firing rates but a pleated paper fuel
oil filter is recommended for the firing rates below
1.0 GPH to prevent nozzle fouling.
NOTICE Do not use compression fittings.
Oil piping must be absolutely airtight or leaks or
loss of prime may result. Bleed line and fuel unit
completely.
Refer to your local jurisdictions regarding any
special considerations for fuel supply requirements.
In addition, refer to NFPA 31, Standard for the
Installation of Oil-Burning Equipment for Installations
in the United States and CSA B139 for Installation in
Canada.
3. Use of a high efficiency micron filter (Garber or
equivalent) in addition to a conventional filter is
highly recommended.
4. Piping used to connect the oil burner to the oil supply
tank shall not be smaller than 3/8" iron pipe or 3/8"
OD copper tubing. Copper tubing shall have a
.032" minimum wall thickness.
WARNING
Under no circumstances can copper with sweat
style connectors be used.
NOTICE Some jurisdictions require the use of a fusible
shutoff valve at the tank and/or the burner. In addition,
some jurisdictions require the use of a fusible electrical
interlock with the burner circuit. Check your local Codes
for special requirements.
B. SINGLE PIPE OIL LINES
1. Standard burners are provided with single-stage
3450 RPM fuel units with the bypass plug removed
for single-pipe installations.
2. The single-stage fuel unit may be installed single-
pipe with gravity feed or lift. Maximum allowable
lift is 8 feet. See Figure 29.
3. Fuel Oil Line Deaerator – On many occasions a leaky
oil delivery line can introduce air into the fuel oil
supply system. This often creates a rough starting
condition and can create a burner lockout state. In
addition to fixing the leak, a fuel line deaerator can
be installed to eliminate air. The single line from the
fuel tank is connected to the deaerator. The burner
pump must be connected to the deaerator as a two
pipe system. Follow the oil pump manufacturer’s
recommendations for conversion to a two pipe
system.
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7 Oil Piping