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Page 78
9.B First Operation
The initial setup must be checked before the unit is
put in operation. Problems such as failure to start,
rough ignition, strong exhaust odors, etc. can be due
to improper setup. Damage to the boiler resulting
from improper setup is not covered by the limited
warranty.
REQUIRED TOOLS: differential pressure gauge
capable of reading negative 0.01 inches W.C.
(0.002kPa), screw drivers, Torx bits, combustion
analyzer.
1.
Using this manual, make sure the installation
is complete and in full compliance with the
instructions and all local codes.
2.
Determine that the appliance and system are filled
with water and all air has been bled from both.
Open all valves.
3.
Observe all warnings on the Operating
Instructions label and turn on the gas and main
electrical power (circuit breaker) to the unit.
4.
If the unit has the optional gas pressure switches,
the low pressure gas switch will need to be reset.
5.
Turn the unit on at the On/Off switch.
6.
The unit will begin the start sequence. The blower
and pump will energize for the pre-purge period,
then the ignition sequence will start.
Note, prepurge and postpurge is a higher RPM
than ignition.
After all safety devices have been verified, the gas
valve will open. If ignition doesn't occur, turn off
the unit, and check that there is proper gas supply.
Wait 5 minutes before restarting.
7.
Follow 8.J on page 74 for set up of Combustion
Mixture.
8.
After placing the appliance in operation, the
Burner Safety Shutoff Device must be tested:
• Close the gas shutoff valve with the burner operating.
• The flame will go out and the blower will continue
to run for the post purge cycle. One or three
additional attempts to light will follow. Each cycle
will include pre-purge, ignitor on, valve/flame on,
and post purge. Ignition will not occur because
Caution
the gas is off. The ignition control will lockout after
a single try or a third try depending on the controller
model.
• Open the gas shutoff valve. Reset the boiler control
by pressing the Reset button on the control or on
the display. If the unit has the optional gas pressure
switches, you will need to reset the low pressure
switch. Find the low pressure switch and press the
reset button. Restart the appliance. The ignition
sequence will start again and the burner will start.
The appliance will return to its previous mode of
operation.
If you detect any odor of gas, or if the gas burner
does not appear to be functioning in a normal manner,
CLOSE THE MAIN SHUTOFF VALVE. Do not shut
off the switch. Contact your heating contractor, gas
company, or factory representative.
9.C Shutting Down the Unit
1.
Turn off the main electrical disconnect switch.
2.
Close all manual gas valves.
3.
If you think the unit might freeze, drain it. All water
must be removed from the heat exchanger, or
damage from freezing may occur. Also be sure to
protect the piping in the building from freezing.
This step must be performed by a qualified service
person.
9.D Restarting the Unit
If the unit has been drained, see Section 9.1 in this
manual for instructions on filling and purging the
unit properly, before continuing.
1.
Turn off the main electrical disconnect switch.
2.
Close all manual gas valves.
3.
WAIT FIVE (5) MINUTES.
4.
Set the aquastat or thermostat to its lowest setting.
5.
Open all manual gas valves.
6.
Reset all safety switches (low pressure gas switch,
manual reset high limit, etc.).
7.
Set the temperature controller to the desired
temperature setting, and switch on electrical power.
8.
The burner will go through a prepurge period
followed by ignition.
B
W
RADFORD
HITE
WARNING
Caution
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