Crown GLT-40F, Руководство по установке и эксплуатации

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INSTALLATION & OPERATION MANUAL 10201 REV 2 (08/22) PAGE
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OF 28
Gas Tilting Kettle S ervice
T o A djust P ressure S witch
1. To obtain access to the pressure switch, the front panel must be removed. Remove the screws on bottom of the
panel. Be sure to support the panel to avoid excessive strain on the wiring.
2. To increase the pressure switch setting, turn the white ribbed knob clockwise; to decrease, turn it counterclockwise.
Use the centre of the black ring as an indicator.
3. With the kettle empty and completely cold, turn kettle on and set thermostat to maximum setting (275 °F).
4. The pressure in kettle (read pressure gauge on front panel) should reach a maximum of 30 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 45 psi; pressure switch setting is satisfactory.
6. If the safety 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 increase setting of pressure switch, cool kettle completely by running cold water
through it and repeat steps 3 - 7.
8. Allow the kettle to cycle several times to verify the correct pressure setting.
9. Replace the front panel when adjustment is complete.
A dding W ater (L ow W ater L ight C omes O n )
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.
3. Remove relief valve and attach a 3/4” NPT elbow pointing upward.
4. Using pure distilled water only, pour the water into the open end of elbow (a funnel will be helpful). Water will enter
kettle slowly, as air must escape through the same hole. Water should be added until water level at the sight glass is
halfway between the minimum and maximum levels.
5. When sufficient water has been added, remove elbow and replace pressure relief valve. Be sure to seal threads with
a pipe joint compound suitable for steam at 50 psi.
6. Vacuum must be re-established (See Re-establishing Vacuum).
FOR REFERENCE:
The total amount of distilled water to be added when low level pilot is illuminated:
MODEL AMOUNT
GLT - 40F 372 fl. oz. (11 L)
R e -E stablishing V acuum
Periodically check pressure gauge when kettle is cold. Reading should be in green vacuum zone (below 0 psi). Otherwise
air is present and proper heating will not occur. Use the following procedure to remove air and re-establish vacuum:
With the kettle empty, turn the thermostat knob to the highest temperature. When the pressure gauge reaches
20 psi, turn thermostat off, open the pressure relief valve until pressure gauge reads 1 psi, then sharply
release it. This should remove the air and restore performance of the kettle.
Should the kettle fail to maintain a vacuum after repeated attempts to establish vacuum, 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.