CLEAN BURN CB-2800 Operator's Manual download pdf (Page 90)

Operator's Manual: Models CB-1500 & CB-2500 (230 V / 50 Hz)

10-2

Main power ON

sending power to

centrifugal switch

and both high limit

switches.

Burner cable

plugged in.

Green indicator

light ON.

Preheater thermostat activates 450 watt block

heater element and heats the block to 60 °C (140 °F).

INITIAL START-UP

Preheater thermostat cycles 450 watt block

heater element and maintains 60 °C (140 °F)

block temperature.

NORMAL BURNER OPERATION

When block temperature reaches 49 °C

(120 °F) , the F120 proving switch closes

and sends power to the oil primary control.

F120 proving switch remains closed and oil

primary control has power.

Oil primary control checks for

2000+ ohms from cad cell

indicating dark in the combustion

chamber (NO FLAME)

BURNER PRE-IGNITION SEQUENCE

Oil primary control relay closes.

Burner ignition sequence begins.

BURNER IGNITION SEQUENCE

14,000 volt igniter starts,

providing Interupted

(15 sec.) spark at

electrode gap.

Air solenoid

opens.

INITIAL START-UP

Air regulator adjusted to

proper air pressure.

Air sensing switch closes

as it receives more than

0.7 bar (10 psi) of air

pressure.

Pump circuit starts

oil pump.

Yellow indicator

light ON.

Pump circuit opens

oil solenoid.

Air sensing switch

receives power from

centrifugal switch.

INITIAL START-UP

Combustion air band adjusted

for proper combustion air.

Centrifugal switch closes and

sends power to air sensing

switch.

Burner motor starts and

reaches full rpm.

Burner ignites.

Oil primary control

receives <500 ohm signal

from cad cell indicating

proper ignition.

Burner continues to run

until the wall thermostat

is satisfied.

FURNACE HEATING SEQUENCE

Blower switch on combustion

chamber senses temperature

rise as the burner fires.

Blower switch senses ON

temperature of 82 °C (180 °F)

and Blower switch closes.

Blower switch sends power

to motor, and blower starts.

Wall thermostat is

satisfied and T

circuit opens.

Primary control relay

opens and the burner

shuts off.

Blower continues to run to drive

latent heat from the heat exchanger.

Blower switch senses OFF temperature of

71 °C (160 °F) and Blower switch opens.

Blower stops running.

FURNACE COOL DOWN SEQUENCE

Warm air delivered

to heated area.

Hour meter starts.

Wall thermostat calls for heat and

closes 24V thermostat.

FLOW CHART

230 V / 50 Hz

I88849

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CLEAN BURN CB-2800 Operator's Manual Page 90

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