Patterson-Kelley TBIG-03 - Manual (Page 16)

Gemini™ Twin-Fuel Gas-Fired Boiler
1. Close main (natural gas and propane) and pilot
shutoffs.
2. Turn the On/Off switch to "OFF" position.
3. Wait 5 minutes.
4. Open main (natural gas and propane) and pilot
shutoffs.
5. Turn the On/Off switch to "ON" position.
6. Push reset button on flame safeguard programmer
control.
7. Push reset on low gas pressure switch (and high
pressure gas switch if applicable).
8. Check to be sure that pilot has been established.
The controller will now complete the automatic firing
sequence.
5 .2.2 Normal Shut-Down Procedures
1. Close all manual gas shutoffs.
2. Turn off electric power.
5 .2.3 Emergency Shut-Down
Natural gas, propane, and pilot gas shutoff valves on
the boiler must be closed immediately if an emergency
situation occurs.
If overheating occurs or the gas supply fails to shut off
at the boiler, to reduce the possibility of an electrical
arc, do not turn off or disconnect any electrical sup-
ply. Instead, shut off the gas supplies remote from the
boiler.
5.3 S WITCHOVER TO P ROPANE O PERATION
Switchover from natural gas to propane is made
manually, as follows:
1. Turn the fuel selector switch located on the main
control panel from natural gas to propane.
The boiler will go through a complete shutdown
and restart procedure when the fuel source is
changed.
If the changeover is controlled by a remote signal, the
switch on the auxiliary control panel should be set at
"Automatic" for both natural gas and propane opera-
tion; operation of the remote switch will change the
fuel source.
During natural gas service interruptions or restrictions,
sufficient natural gas is usually available to operate
the pilot. In the event of complete failure of the natu-
ral gas supply, contact Patterson-Kelley at (570) 421-
7500 for assistance.
General Warning
Warning! In the event of low pressure in either the
natural gas or propane supply the higher pressure gas
could backfeed into the lower pressure line. This could
result in unsafe operation of other devices connected
to the higher pressure supply.
Always shut off the gas cock to a line which exhibits
low pressure.
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