Crown GLT-80 Installation & Operation Manual page 18

Service
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
are listed below:
Model
GLT-80
GLT-100
Re-Establishing Vacuum
With the kettle completely cold a vacuum of 25 to 30 inches Hg (630 - 730 mm Hg) should be maintained as indicated
in the green zone on the pressure gauge on the front control panel. If at any time the vacuum is not in the green zone,
vacuum should be re-established.
With the kettle empty, turn the thermostat knob to the highest temperature. When the temperature pilot light goes off, open
air vent nut one (1) full turn for 30 seconds and then close and tighten the nut. This should remove the air and any loss in
performance should return.
Should the kettle fail to maintain a vacuum after repeated attempts to establish it, further checks should be made to see
if the pressure relief valve is leaking or if there are any leaks in the pressure relief valve piping, copper lines going to the
pressure switch, pressure gauge or thermostat fitting.
Control Circuit Fuses
The control circuit is protected by a 3 amp. fuse which is located inside control panel, top right side above transformer.
Should the unit fail to turn on, check this fuse by removing it and either replacing it or testing it with a continuity tester. If
the fuse is good, check the main power circuit breaker, which should be external to the kettle.
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Total Amount of Distilled Water
16.3 Gallons (61.71 L)
16.3 Gallons (61.71 L)
INSTALLATION & OPERATION MANUAL 10325 REV 1 (11/21)
Gas Fired Steam Tilting Kettles
Amount of Water to be Added
in a Low Water Condition
721 Fluid Ounces (21.32 L)
721 Fluid Ounces (21.32 L)