RIELLO 40-BF BURNER
Fully insert the female end of the 2" 90° street elbow
into the combustion air fitting on top of the burner.
Fasten securely with 3 self tapping sheet metal
screws. Cement the 2" end of the 3" female to 2"
female reducer onto the male end of the 2" 90° street
elbow. If these parts are not easily obtained, use a 3"
90° street elbow with the male end fitted over the
combustion air fitting. The fitting will have to be
silicone sealed as the fit is a bit loose. Fasten securely
with 3 self tapping sheet metal screws.
TERMINAL CONNECTION
Insert the 3" 90° female-female elbow onto the
stainless steel air intake fitting located on the right
side of the vent terminal (viewing from the rear).
Fasten securely with 3 self tapping sheet metal
screws.
INTERMEDIATE PIPING
Pipe as required between the terminal and the burner.
Ensure that the 3" piping is routed and supported in
accordance with local and national codes.
minimum furnace clearances to combustibles when
routing any sections of 3" piping in the vicinity of the
furnace. If Septic Sewer Pipe is to be used, install
transition bushings at the 3" female ends of the fittings
at the burner and at the terminal. Transition bushings
are readily available and are required because 3" PVC
and ABS pipes have a typical outside diameter of 3.5",
whereas Septic Sewer Pipe has a typical outside
diameter of 3.25".
Notes: See table # 4 for the system specifications for
nozzle size restrictions for various burners / models.
Air settings are initial settings only.
4)
INSTALLING ACCESSORIES
4.1)
Electronic air cleaner:
Wire leads are to be attached to L1 and Neutral to
direct 115 volts @ 0.5 Amp maximum to an electronic
air cleaner (EAC). Power will be available to the EAC
at all times, so it must incorporate a flow proving
switch if it is to be wired into the furnace control box.
Most modern EACs have the required integral air flow-
proving switch.
Wire the electronic air cleaner as
indicated on figure # 5, Wiring Diagram.
4.2)
Humidifier:
A wire lead is provided and the Neutral lead must be
attached to the main Neutral to direct 115 volts @ 1.0
Amp maximum to the transformer powering the
humidifier. The humidifier will be energized anytime
the blower is operating on the "Heating Speed". Wire
the 115-volt power as indicated on figure # 5, Wiring
Diagram.
4.3)
Air conditionning:
An air conditioning coil may be installed on the supply
air side only. Also, notwithstanding the evaporator coil
manufacturer's instructions, a minimum of 6 inches
clearance must be allowed between the bottom of the
coil drain pan, and the top of the heat exchanger.
Wire the thermostat and condensing unit contactor as
indicated on figure # 5, Wiring Diagram.
5)
OPERATION
5.1)
Sequence of operation - Beckett
AFII, Sidewall venting:
a. Jumper let contact closed on T-T primary control
terminal of the burner.
Obey
b. Normally open contact (W-R) on SPDT relay
closed when thermostat calls for heat.
c. Burner motor starts and spark is established. The
burner motor fan pre-purges the combustion
chamber and vent for 15 or 20 seconds,
establishing the combustion air pattern.
d. Solenoid valve opens allowing oil to flow through
nozzle.
e. Transformer spark ignites oil droplets.
f.
Cad cell senses flame and burner continues to
fire.
g. After fan-limit control bi-metal heats up to the
factory set point, the circulating air blower starts.
h. The circulating air blower, burner motor and
ignition
thermostat is satisfied. Also, the solenoid valve
remains open.
i.
Thermostat is satisfied.
j.
SPDT relay contacts open, solenoid valve closes,
burner fan motor post-purges the combustion
chamber and vent for a preset time of 30 seconds
to 4 minutes. The ignition transformer also
continues to spark for this time period.
k. During the post-purge cycle, the fan-limit control
bi-metal cools down to the factory set point of 90
degrees Fahrenheit, and the circulating air blower
turns off.
5.2)
Sequence of operation - Riello 40-
BF, Sidewall venting:
transformer
remains
on
until
the
15