Form I-RA/D 350/500, P/N 131090R12, Page 23
Check-Test
Continued
CAUTION: An
external duct
system static
pressure not within
the limitation on the
heater rating plate
and/or improper
adjustment of the
motor pulley or
belt may overload
the motor or cause
overheating of the
heat exchanger.
• While the pump is running, record the vacuum gauge reading and
post it on or near the remote pump assembly.
The maximum allowable vacuum rise is 10” Hg. (Example: With a
new oil lter, if the vacuum gauge indicates a suction line vacuum of
3” Hg, the maximum allowable gauge reading is 13” Hg.)
• Display adhesive “Waste Oil Recycling” decal on entry door or
window.
• Adhere tank warning label at location visible when lling the tank
or at a point where fuel is rst introduced to a transfer piping sys-
tem.
• Complete the information on page 60. Return all instruction manu-
als to the “Literature Bag.” Give the manuals to the owner to keep
for future reference.
Check Discharge Air Temperature - Model RAD with discharge
ductwork only.
RAD350 - This heater is designed for a maximum of .25” w.c. static pres-
sure and for discharge air temperature rises from 40° to 50°F.
RAD500 - The standard heater is designed for a maximum of .25” static
pressure and for discharge air temperature rises from 55° to 65°F. A Model
RAD with an optional 3HP motor and drive is designed for a maximum
of .50” static pressure (check the unit rating plate).
If the heater has been equipped with a duct, the discharge air tempera-
ture should be checked.
• Place a thermometer or a thermocouple in the middle of the outlet
or at the end of the discharge duct and measure the discharge air
temperature after the heater has operated for at least 20 minutes.
If the temperature rise is not within the specied range, the blower speed
will have to be adjusted to achieve the correct temperature rise. If the
blower motor maximum amp rating is exceeded, the ductwork must be
altered to reduce the static pressure (resistance of the air ow).
Follow these instructions to adjust blower speed.
• Turn off the electrical power.
• Loosen belt tension and remove belt.
• On the side of the pulley away from the motor, loosen the set
screw.
To increase blower speed, decreasing outlet temperature
• Turn the adjustable half of the pulley inward.
To decrease blower speed, increasing outlet temperature
• Turn the adjustable half of the pulley outward.
One turn of the pulley will change the speed 8-10%.
• Tighten the set screw on the at portion of the pulley shaft.
• Replace the belt and adjust the belt tension.
Belt tension is adjusted by means of the adjusting screw on the motor
base. Adjust until the belt can be depressed 1/2-3/4”.
• Tighten the lock nut on the adjusting screw.
• Turn on the electric power.
• Start the heater by turning the thermostat to a setting higher than
room temperature.
• Check motor amps with an amp meter. The maximum motor amp
rating on the motor nameplate must not be exceeded.
To Next Page
Loading...