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Gas Kettles
Pressure Switch
The pressure switch should not be adjusted until it is determined to be the cause of an operating pressure deficiency. See
"Thermostat" section to determine if the source of difficulty is the pressure switch or thermostat.
The major difficulties caused by pressure switch mis-adjustment are:
1. Pressure relief valve opening, especially on preheat from a cold start to 275 degrees Fahrenheit (135 °C) (pressure
switch set too high).
2. Burners are being shut down by pressure switch, not the thermostat. (Pressure switch set too low.)
The pressure switch is preset for proper operation from the factory. It is adjusted to the maximum pressure, however not high
enough to cause the pressure relief valve to open. This setting will be slightly different on different kettles due to variations in the
pressure relief valves. During preheat to the maximum thermostat setting (275 degrees Fahrenheit) (135 °C), from either a cold
condition or a lower temperature setting, the temperature may overshoot the thermostat setting and shut down the burners by the
pressure switch. This is normal, however, after the kettle cycles several times (empty) the thermostat will begin cycling the unit.
To Adjust Pressure Switch
1. To obtain access to the pressure switch, the front panel must be removed. Remove the screws on either side of the
panel. Be sure to support the panel to avoid excessive strain on the wiring.
2. To increase the pressure setting turn the white ribbed knob clockwise; to decrease the pressure, turn it
counterclockwise. Use the centre of the black ring as an indicator.
3. With the kettle empty and completely cold, bypass the thermostat by moving the single terminal side wire to the
double terminal side connector on the thermostat. Turn kettle on.
4. Pressure in kettle (read pressure gauge on front panel) should reach a maximum of 35 psi and pressure relief valve
should not open. Kettle pressure may rise 3 or 4 psi even after burners shut down.
5. Relief valve should not open when kettle pressure is 40 psi; pressure switch setting is satisfactory.
6. If relief valve opens, reduce setting on pressure switch, cool kettle completely by running cold water through it and
repeat steps 3 - 6.
7. If pressure in kettle is below 30 psi when burners shut off, increase setting of pressure switch, cool kettle completely
by running cold water through it and repeat steps 3 - 7.
8. When adjustment is complete, move wire from shorted terminal on the thermostat back to the appropriate terminal
and replace the front panel.
Adding Water
It may be necessary to replenish water in the jacket when the low water indicator comes on. Do so as follows:
1. Unit should be completely cold and off.
2. Lift handle of pressure relief valve to release vacuum in kettle. (Relief valve is at right rear of kettle).
3. Remove air vent nut on the tee located between kettle and relief valve.
4. Using pure distilled water only, pour the water into the opening. (A funnel will be helpful). Water will enter the kettle
slowly, as air must escape through the same hole. Water should be added until the water level at the sight glass is half
way between the minimum and maximum levels.
5. When sufficient water has been added, replace and tighten the nut.
6. Vacuum must be re-established. (See Re-establishing Vacuum).
FOR REFERENCE:
The total amount of distilled water contained in each unit, and amount to be added in a low water condition is listed below:
MODEL
TOTAL AMOUNT OF DISTILLED WATER
GL-40FE
GL-60FE
INSTALLATION & OPERATION MANUAL 10199 REV 3 (08/22)
12 Gallons (46 L)
16 Gallons (61 L)
AMOUNT OF WATER TO BE ADDED IN A LOW WATER CONDITION
338 Fluid Ounces (10 L)
720 Fluid Ounces (21 L)
Service
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