Henny Penny 500 Service Manual page 256

The safety relief valve should be cleaned once a year.
1. Open the lid and then remove the deadweight valve cap and deadweight.
2. Use a wrench to loosen the valve from the pipe elbow, turn counterclockwise to
remove.
3. Clean the inside of the pipe elbow with hot detergent.
4. Immerse the safety relief valve in a soap water solution for 24 hours. Use a 1:1
dilution rate. The valve cannot be disassembled. It is factory preset to open at
14 1/2 pounds of pressure. If it does not open or close it must be replaced.
8 8 . . 2 2 3 3 . . 5 5 P P r r e e s s s s u u r r e e G G a a u u g g e e C C a a l l i i b b r r a a t t i i o o n n
The pressure gauge can be recalibrated if out of adjustment.
1. Remove the rim and glass.
2. If the indicating hand shows a pressure or vacuum reading when it should point to
"O", turn the calibration screw until the hand stands at the "O" position.
3. Replace the rim and glass.
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