Table 2-1. Operating Controls and Instruments
Burner switch "Low"
Turns the low fire burner ignition ON and OFF.
Burner flameout reset light
Indicates flame out, due to a malfunction of burner.
Burner switch "High"
Turns the high fire burner ignition ON and OFF.
Pump control switch
Turns the pump motor, fuel pump and blower ON and OFF.
Indicates elapsed time pump control switch has been ON to the steam
Back pressure gage
Indicates back pressure of the water at the coil inlet.
Soap control valve
Controls the amount of soap being mixed to the pump inlet water
Controls the water volume going into the coils, if closed (vertical) 600
Soap fill and stir valve
Allows soap tank to be filled with water prior to burner operation and
agitated (hot) after burner operation.
Indicates the steam temperature at the outlet side of the coils.
Steam pressure gage
Indicates the outlet steam pressure.
Pressure relief valve
Releases excessive steam pressure. Set at 400 psi.
Fuel fill spout
Burner fuel is added through this port.
Solution tank drain
For draining soap solution.
Soap check valve
Prevents supply water from backing up into soap tank.
Provides a safety in event of excessive water pressure from pump,
returns excess water to suction side of pump. Set at 370 psi.
Shut-off valve (reservoir)
Shuts off and allows the suction of water from auxiliary supply. Shut off
only when using auxiliary source (22).
Water inlet connection
Pressurized water source is connected to this location.
Float valve assembly
Controls amount of water from outside pressurized water source in
Turns ON and OFF the main (220 volts) power source to cleaner.
Motor reset switch
Prevents an overload of cleaner circuits. Manually reset in the event of
Auxiliary water valve and connector.
Permits the use of auxiliary water supply.
Reservoir overflow and drain
Allows excess water in reservoir to spill out. Remove pipe nipple to
Excessive discharge pressure switch
Monitors discharge pressure and shuts unit down after an excess
pressure rise. Set at 350 psi.
Manually resets after a shutdown of main burner in the event of a
High temperature switch
Manually reset overtemperature switch after an overtemperature
condition has occurred. Set at 370°F.
Air pressure switch
Shuts down unit in event of insufficient air pressure and automatically
resets. Set at 1.5 inch (WCP).
Low water pressure switch
Senses inadequate water supply to coil. If water supply is inadequate, it
shuts down the fuel to burners. Set at 15 psi minimum to actuate (close
Oil solenoid valves (2)
Turns ON and OFF the oil burners automatically. FWD valve is high
fire burner. AFT valve is low fire burner.
Oil pressure switch
Shuts down burner if oil pressure drops below 45 psi. Allows burner to
fire when 85 psi is achieved by fuel pump. Controls oil valves (29).
Excess oil is recirculated to oil tank when burners are turned down.
Air dome drain valve
Used to drain air cushion chamber daily or after every 4 hours of
operation. This valve is a drain valve from coils and is used to discharge
excess water from the coils, cleaning and descaling of the coils.
Discharge valves (2)
Controls steam discharge for one or two gun operation. One valve must
be open at all times.
Manually turns ON and OFF the fuel oil to burners.
Pressure and temperature control
high-low valve (thermostat)
Controls flow of oil through oil valves (29) and is controlling the steam
temperature by regulating amount of fuel. Adjustment by turning CW
decreases temperature, CCW increases temperature. Set at 325°, for
vapor operation, or set lower for hot rinse at approximately 185-200°.
Soap fill port
Soap is placed in soap tank through this port.
Control circuit protection 6 amp fuse.
Overrides low water pressure switch (28) to permit burner operation
during the blowdown of coils.
Air dome vent
Provides venting of air dome during draining operation.
Fuel strainer valve
Fuel tank shut-off valve between tank and strainer.
Fuel tank drain valve
To drain excess fuel from fuel tank.