TM 10-3510-209-10
2-2. LOCATION AND USE OF CONTROLS AND INDICATORS. (CONT)
Key
Control or Indicator
Function/Use
11
Petcock Valve
Allows operator to drain excess fuel from
combustion chamber.
12
Drain Valve
Allows operator to drain water from water
heater.
13
Burner Spark Sight Glass
Allows the operator to observe ignition spark.
14
Sight Glass Assembly
Allows the operator to observe flame inside
burner assembly.
15
Hot Water Output Valve
Controls hot water output from the water heater
to the washer.
2-9
