19
Priming furnaces equipped with Honeywell
R7184 primary control:
1. While the ignition is on, press for 1/2 second (or less),
and release the reset button. The lockout time will be
extended to 4 minutes.
2. If prime is not established within the 4 minutes, the
control will lock out. Press the reset button to reset the
control.
3. Repeat steps 1 & 2 (if needed) until the oil pump is
fully primed.
Priming furnaces equipped with Beckett 7505
primary control:
1. After the burner starts, press and hold the reset button
until the yellow LED turns on (15 seconds). This indicates
that the button has been held long enough.
2. Release the reset button. The yellow LED will turn off
and the burner will start up again.
3. At burner start up, click the reset button while the igniter
is still on. This transitions the control to a dedicated pump
prime mode, during which the motor, igniter and valve
are powered for 4 minutes. The yellow LED will be on.
NOTE:
If prime is not established during the four minute
pump prime mode, repeat step 3 until the oil pump is
fully primed.
4. When oil fl ow is clear and free of air bubbles, close
air-bleed valve and tighten.
NOTE:
Air bleed out time
will varies depending on length of oil line, number of
bends, etc.
Fuel Oil Type
WARNING:
Do not use gasoline, crankcase oil, or any oil
containing gasline. Failure to keep supply of oil
clean by various procedures described above
may cause failure of certain components such
as the fuel pump gears, check valve, shaft seal, or
burner nozzle which may result in a burner fi re.
Do not use fuel oil heavier than Grade No. 2. In areas
where the oil supply is subject to low temperatures, Grade
No. 1 may be used.
Conversion to Propane (LP) Gas
CAUTION:
Furnace conversion must be performed by a
qualifi ed technician. Improper conversion can
cause unsafe operation, explosion, fi re and/or
asphyxiation.
This gas fi red heating appliance was shipped from the
factory for use with natural gas. However, the appliance
can be converted for use with LP gas. Use the following
procedure for gas conversion of the burner.
Atmospheric & Direct Ignition Furnaces
1. Follow the instructions “How to Shut Off Gas” (page
22).
2. Disconnect the gas pipe union and the electrical wires
connected to the gas valve.
3. Remove the gas valve assembly:
a. Remove screw(s) from gas valve bracket. Gas valve
and spud may be removed. Orifi ce is located at the
end of the spud (M1M Models)
b. Remove three (3) bolts from U-shaped manifold plate
and orifi ce assembly (M1B Models).
5. Replace the main orifi ce with the L.P. gas orifi ce supplied
in the envelope located by the gas valve. Verify the
orifi ce size matches the nameplate or Table 10 (page
31).
6. For Honeywell gas valves with the regulator converter:
a. Unscrew the pressure regulator cap and check for
the letters NAT or LP. See Figure 28, page 20.
b. Invert the cap and tighten until snug.
7. For Robertshaw gas valves with the regulator converter:
a. Remove the black cover and unscrew the converter
located on top of the gas valve. See Figure 29.
b. Invert the converter. For LP, the red ring will be located
at the bottom and the LP stamping on the converter
will appear right side up.
c. Screw converter back into the regulator, hand tight
plus 1/8 turn. Replace the black cover on the converter
top to protect the threads.
8. Reassemble the burner assembly into the furnace.
9. Reconnect the gas piping and electrical wires to the
gas valve.
10. Open the manual shut-off valve and follow the Lighting
and Operating instructions on page 22.
High Altitude Conversion
High altitude conversion with this furnace depends on
the installation altitude and the heating value of the gas.
The installation of this furnace at altitudes above 2,000
feet must meet the requirements of the National Fuel Gas
Code or local jurisdiction. In Canada, the requirements for
high altitude are different and governed by CGA B149.1.
Please consult your local code authority.
WARNING:
The reduction of input rating necessary for high
altitude installation may only be accomplished
with factory supplied orifi ces. Do not attempt to
drill out orifi ces in the fi eld. Improperly drilled
orifi ces may cause fi re, explosion, carbon
monoxide poisoning, personal injury or death.
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