Form I-RA/D 350/500, Page 10
Fuel Tank,
Pump, and
Supply Lines
General Requirements
Model RA/RAD 350 and RA/RAD 500 heaters are approved to burn used
crankcase oil, transmission uid, and No. 2 fuel oil. Maximum fuel input
for a Model 350 is 2.5 GPH (11.4 L/H). Maximum fuel input for a Model
500 is 3.6 GPH (16.4 L/H).
The oil supply tank and fuel lines must be installed in accordance with
the National Board of Fire Underwriters requirements and all local ordi-
nances. A UL-listed tank such as Reznor
®
Model OT-250 or equivalent
must be used.
In the U.S., regulations require that storage tanks located inside buildings
shall not exceed 275 gallons (1,041 L) individual capacity or 550 gallons
(2,082 L) aggregate capacity in one building.
In Canada, regulations require storage tanks located inside buildings
shall not exceed 550 gallons (2,082 L) individual capacity or 1,100 gal-
lons (4,164 L) aggregate in one building.
Check with the local Fire Marshal to assure compliance with local or-
dinances and codes. Installation of the tank and supply lines is the
responsibility of the installer.
Fuel Tank
CAUTION: It is recommended that used oil be at a
temperature of 50°F or higher when it enters the pump.
At a temperature below 50°F, heavier oils become more
viscous and difcult to pump. The heater may re at a
reduced rate and become erratic resulting in nuisance
shutdowns.
Install either a UL listed Reznor
®
Model OT-250 oil supply tank or a eld-
supplied equivalent indoor storage tank.
• If installing a Model OT-250 tank, follow the installation
requirements and instructions on the tank.
• If installing a eld-supplied tank, follow the manufacturer’s
instructions.
• Height from the pump to the bottom of the heater should be no
more than 15 ft (4.5M). The used oil supply line should be a
maximum of 60 ft (18M) in length when using 3/8” o.d. tubing or a
maximum of 100 ft (30.5M) when using 1/2” o.d. tubing.
Although maximum height from the pump to the heater is 15 ft (4.5 M),
we recommend that ease of service be considered when determining
heater location. A service height of eight feet (2.5 M) is recommended.
See the illustrations on pages 11 and 12 for examples of tank and line
installation.
WARNINGS: Never pour gasoline or used oil containing
gasoline into the supply tank. Adequate ventilation
must be provided in any enclosures where storage
tanks, pumps, or accessories are installed.
Fuel Tank
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