Table of Contents
Advertisement
LIGHTING PROCEDURE FOR BOILER WITH
INTERMITTENT PILOT SYSTEM
1.
STOP! Read the safety information in the user's infor-
mation manual.
2.
Set thermostat to lowest setting.
3.
Turn off all electric power to the appliance.
4.
This appliance is equipped with an ignition device which
automatically lights the burner. DO NOT try to light the
burner by hand.
5.
Turn the gas control knob clockwise
figure 27.
6.
Wait five (5) minutes to clear out any gas. Then smell
for gas, including near the floor. If you smell gas,
STOP! Follow "What To Do If You Smell Gas" in the
safety information section. If you don't smell gas, go on
to the next step.
7.
Turn the gas control knob counterclockwise
"ON".
8.
Turn on all electrical power to the appliance.
9.
Set the thermostat to desired setting.
10.
If the appliance will not operate, follow the instructions
"To Turn Off Gas To Appliance" and call your service
technician or gas supplier.
On a call for heat:
1.
The thermostat will actuate, completing the circuit
between terminals T and T.
2.
The R8222C relay coil will energize thus pulling in the
relay contacts.
3.
The circulator starts and power is switched to the limit.
If limit circuit is closed the venter motor and TF-2
transformer are energized.
4.
The venter motor starts and develops static pressure.
5.
When the static pressure is reached the pressure switch
pulls in completing the circuit between TF-2 and the
intermittent ignition control.
6.
The intermittent ignition control opens the pilot valve
and ignites pilot. After pilot is proven the main burner
will ignite.
7.
In the event the boiler water temperature exceeds the
high limit setting the power will be interrupted to the
venter motor, and TF-2 thus interrupting power to the
ignition system. Power will remain off until the water
temperature drops below the high limit setting. The
circulator will continue to operate under this condition
until the thermostat is satisfied.
LIGHTING INSTRUCTIONS
TO TURN OFF GAS TO APPLIANCE
1.
Set the thermostat to lowest setting.
2.
Turn off all electric power to the appliance if service is
to be preformed.
3.
Turn gas control knob clockwise
Force.
Figure 27 - Intermittent Pilot System
to "OFF". See
to
SEQUENCE OF OPERATION
8.
Should the air flow (static pressure) be interrupted
(example blocked flue, etc.), the pressure switch will
sense a drop in pressure, opening the circuit between
the ignition system and TF-2. The venter motor will
continue to operate until static pressure is reached or
thermostat is satisfied.
9.
In the event the flow of combustion products through
any part of the boiler flueway becomes blocked, a
flame safety roll-out switch will shut off the main
burners. If this condition occurs, do not attempt to
place the boiler back operation.
10.
When the thermostat is satisfied power is interrupted to
the relay coil and the relay drops out cutting power to
the circulator, venter motor, and TF-2.
33
to "OFF" Do Not
Advertisement
Table of Contents
