INOV8 Model F240 – Edited September 2008
18
BOOST PUMP (OPTIONAL)
INOV8 supplies two different boost pumps: 1) an electric gear pump manufactured by
Suntec Industries, and 2) a Husky diaphragm pump manufactured by Graco Industries.
Both do a fine job moving waste oil from a storage tank to the burner. The installations
are different in that the Suntec pump requires an electrical connection to power the
pump, while the Graco pump requires air pressure to drive the pump.
• Suntec pump: The pump MUST be mounted so the motor / pump shaft line are
horizontal and the pressure relief valve in the boost pump must be set to 20 PSI.
The pump will not work if mounted upside down. See the electrical hookup for
the boost pump on the electrical diagram on page 46.
• Graco Diaphragm pump: an air pressure regulator and gauge assembly must be
installed in the airline prior to the pump. The air regulator controls the pumping
pressure and is usually set at 30 - 40
PSIG. This may be varied to accommodate
your installation. Instructions accompany the pump and must be followed for the
installation.
Follow these guidelines for either pump:
1. Install the boost pump as close to the oil tank as local code allows, but always
inside the building. Keep the suction line and suction lift as short as possible.
The maximum horizontal suction run is 30 feet and the maximum suction lift is 4
feet.
2. Make sure the boost pump can be easily primed and serviced and it is protected
from water and combustible fumes. A strainer (not supplied by INOV8) should
be installed at the end of the oil suction line within the tank to protect the boost
pump from debris.
3. Locate the filter/check valve assembly at a convenient location between the
boost pump and the oil pressure regulator assembly (supplied by INOV8 with
boost pumps). Connect to the outlet side of the boost pump with 1/2 inch copper
tubing.
4. After the proper piping/tubing has been installed the pump may be turned on for
priming. For the Suntec Pump, leave the bleeder port of the boost pump fully
open until all entrapped air is purged from the suction line (at least one-gallon of
oil). When a steady stream of oil is flowing, close the bleeder port and snug it
tight with a 3/8” wrench. If the oil stream fluctuates and sputters, check for air
leaks in the suction line.
5. The oil pressure regulator and gauge assembly must be installed near and at the
same height as the burner.
6. The oil line between the tank and the boost pump must be absolutely airtight so
the pump does not suck air. It is very important that pipe compound be used on
all fittings and that they are tight. Pressure test the line prior to use. Follow the
recommendations in the following section for installing the piping.
If multiple furnaces are installed, one boost pump will supply a maximum of three
burners; however, a separate filter and regulator assembly is recommended for each
furnace.
See additional details on the following page.
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