Thermo Pride GMD1-80N Installation And Service Manual page 41

All installations and services must be performed by qualified service personnel.
ON START-UP:
8. Have the heating system (and furnace) inspected and started by a qualified
service person.
9. Set the room thermostat above room temperature.
10. Open all shutoff valves in the gas supply line.
4. Turn "on" the main power at the disconnecting switch and at the furnace power
switch to start the inducer.
5. Follow the "BURNER OPERATION AND ADJUSTMENT" procedure in Section L.
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