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OPERATING INSTRUCTIONS
1.
STOP! Read the safety information on previous page.
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 pilot. DO NOT try to light the
pilot by hand.
5.
Move the ignition system control switch to the "OFF"
position. See Figure 10.
6.
Wait five (5) minutes to clear out any gas. If you then
smell gas, STOP. Follow "What To Do If You Smell Gas"
on previous page. If you don't smell gas, go to next
step.
7.
Move the ignition system control switch to the "ON"
position. See Figure 10.
8.
Turn on all electric power to the appliance.
9.
Set thermostat to desired setting.
10.
If the appliance will not operate, follow the instructions
"To Turn Off Gas To Appliance" to right and call a
qualified service technician or your 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 TR-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 TR-2 and the
SV9501H gas valve system.
6.
The SV9501H 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 TR-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.
OPERATING INSTRUCTIONS
Figure 10 - Gas Control Screw
PRESSURE
TAP
TO TURN OFF GAS TO APPLIANCE
1. Set thermostat to lowest setting.
2. Turn off all electric power to the appliance if service is to
be performed.
3. Move the ignition system control switch to the "OFF"
position. DO NOT FORCE
SEQUENCE OF OPERATION
8.
Should the air flow (static pressure) be interrupted (ie.
blocked flue), the pressure switch will sense a drop
in pressure, opening the circuit between the ignition
system and TR-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
the boiler flue-ways becomes reduced or blocked, the
Q34505 pilot will lose flame rectification and shut off
the main burners. The boiler will try for ignition but
will not light. If this condition occurs, turn off the main
power and do not put the unit into 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 TR-2.
14
PILOT FLOW ADJ.
SCREW BENEATH
COVER SCREW
GAS
OUTLET
ADJUSTMENT BENEATH
IGNITION SYSTEM
CONTROL SWITCH
GAS
INLET
PRESSURE REGULATOR
COVER SCREW
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