36
Visual inspection of fl ame through sight glass. Burner
•
should be fully illuminated. See fi gure 9-5.
Check expansion tank.
•
11.2 Annual shut down procedure
Follow instructions “To Turn Off Gas To Appliance”
•
unless
boiler is also used to supply domestic hot water. See
section 10.
Drain system completely and add antifreeze when
•
heating system is to remain out of service during freezing
weather.
Drain condensate lines when boiler is to be exposed to
•
freezing temperatures.
WARNING
Following service procedures must be performed
by qualifi ed service agent. Boiler owner shall not
attempt these steps.
!
WARNING
Use gloves when handling refractory to avoid
absorption of crystiline silica a potentially dangerous
compound.
!
11.3 Annual Examination and Cleaning of Boiler
Components
Obtain Burner Inspection Kit. See "Parts, Kits and
•
Optional Accessories" manual.
Before servicing, turn off electrical power to boiler at
•
service switch.
Follow instruction 'To Turn Off Gas to Appliance'. Close
•
main gas valve.
Visually inspect through sight glass verify no fl ame is
•
present.
11 - GENERAL MAINTENANCE AND CLEANING
E
F
Burner Assembly
A
Blower Inlet Housing
B
Refractory
C
Burner
D
Flame Sensor
E
Igniter
F
Sight Glass
*
Inlet Gasket
* Not Shown
11-2 Blower Inlet Assembly
A
B
C
D
Summary of Contents for 075 97gb
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Page 57: ...57 14 WIRING DIAGRAM 14 2 Schematic Diagram of Ladder Form ...
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