How to Adjust The Steam Pressure- Hoffman Steamers- Tips & Tricks
Adjusting The Steam Pressure on Hoffman Steam Products
Thermostat Control:
Power the boiler.
Turn the thermostat to "10"
Allow the boiler to come up to pressure.
Remove the dial from the thermostat.
Using a small screwdriver, turn the screw inside the stem clockwise to reduce the pressure, counter clockwise to increase the pressure. Turn the stem in 1/4 turn (90 deg) increments. Allow the unit to heat or cool . The final high pressure is reached when the heatig light goes out.
Use a dab of nail polish to secure the screw in position
Put the dial back on the thermostat.
The maximum pressure setting shall be 90 psig. Attempting to raise pressure higher will result in relief valve venting.
All field wired units are supplied with a knock-out-sized to UL specifications. Inside the electrical panel is a wiring schematic for power and ground connections.
Pressure Control:
Warning: HIGH VOLTAGE IS PRESENT. DO NOT TOUCH ANY WIRES IN THE PRESSURE CONTROLL BOX. A LICENSED ELECTRICIAN OR PLUMBER SHOULD PERFROM THIS ADJUSTMENT
Remove the cover on the pressure controller.
Power the boiler and allow the boiler to come up to pressure.
Turn the set screw inside the controller to increase or decrease the pressure. The final pressure is reached when the heating light goes out. This should be set on rising pressure.
The dead-band adjusmnt screw should be set to the turn the heating element on 5 to 10 psig below the cut-off pressure. This should be set on falling pressure.
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