24
I-OH (01-20) PN120390R7
OPERATION—CONTINUED
Pre-Startup Checklist—Continued
Check the electrical supply:
ensure that wire gauges are as recommended and that the voltage is as stated
on the furnace. A service disconnect switch should be used. Also determine that fusing or circuit breakers are
adequate for the load use.
Check the oil supply.
Check piping:
after installation and before being covered, piping should be tested for leaks. Before testing,
disconnect supply piping at the burner and cap. Test piping hydrostatically or with equivalent air pressure not
less than 1-1/2 times the maximum working pressure but not less than 5 pounds per square inch at the highest
point of the system. The test shall be made so as not to impose a pressure of more than 10 pounds per square
inch on the tank. This test shall be maintained for at least 30 minutes or for sufficient time to complete a visual
inspection of all joints and connections. Instead of a pressure test to check piping, suction lines may be used
under a vacuum of not less than 20 inches of mercury maintained for at least 30 minutes.
Check vents:
ensure that the vent pipe and chimney are in accordance with the requirements listed in the
section. An approved draft regulator is required. In order to measure the draft in
the stack after firing, drill a 5/16-inch hole in the flue pipe, halfway between the heater and the draft regulator,
for inserting the draft gauge.
Check electrode adjustment
. ensure electrode positioning is in accordance with
. Turn OFF the
electrical power before making the check.
Check the oil delivery
. For an accurate check of the oil delivery, remove the burner assembly and connect it
outside the firebox. Disconnect the high tension lead. Start the burner and collect the oil flow for 1 minute and
measure it in a container marked in cubic centimeters. Some safety controls may trip when operated for 1 minute.
If this occurs, collect the flow from the nozzle for 30 seconds, measure the cubic centimeters, multiply by two,
and check the values listed in
, which lists the oil flow rate in Cubic Centimeters (cc) per minute to obtain
the output in Gallons Per Hour (GPH).
Table 11. Oil Flow Rate
Unit Size
cc Per Minute
GPH
095
54.0
0.85
140
78.5
1.25
190
85.0
1.35
Startup Checklist
NOTE: Priming the oil line can take up to 30 minutes depending on the size of heater and the
length of the supply line.
Prime the unit (one-pipe supply):
the oil supply line to the heater must be full of oil and free of air for proper
heater operation. Prime the oil line as follows:
a. Ensure that oil tank is filled to level at least 6 inches (152 mm) above foot valve.
b. Set thermostat to its lowest setting.
c. Connect one end of rubber tubing to air bleed valve on burner pump (see
) and place other end into
open container (no smaller than 1 pint).
d. Turn OFF electrical power at switch on heater electrical box (see
e. Using 3/8-inch wrench, loosen air bleed valve two or three turns.
f. Set thermostat to above room temperature.
g. Turn ON electrical power. Burner pump operates. Oil runs into container when air has been bled from line.
While operating under these conditions, heater will not light because pressure valve in pump will not open.
) if primary control shuts down pump before line is bled. It may be necessary
to push reset button several times while bleeding off air. Wait 3 to 4 minutes between pushes of reset button
to allow internal bimetal strip to cool down. Pump runs for 45 seconds each time.
i. After all air is bled from line, close bleeder valve and turn OFF main power.
