PRESSURE RELIEF VALVE PERIODIC TESTING
Pressure
Relief Valve
Valve
Ring
Access
Panel
Most insurance agencies require periodic testing of pressure relief valves used on pressure vessels. This procedure will allow you to safely and quickly test your kettle's pressure relief valve. We recommend this test be performed twice a year.
DANGER: PRESSURE RELIEF VALVE WILL EXHAUST HIGH TEMPERATURE STEAM. CONTACT WITH SKIN COULD RESULT IN SERIOUS BURNS. KEEP FACE,
HANDS AND BODY CLEAR OF DISCHARGE.
DANGER: WORKING ON MACHINES
WITH POWER COULD RESULT IN
SEVERE ELECTRICAL SHOCK.
NOTE: The following instruction is intended for use by qualified service personnel.
WARNING: Kettle surface will be hot and steam will be released during testing. Take necessary precautions including the use of gloves and eye protection to
NOTES:
If valve appears to be sticking replace pressure relief valve.
If foreign material is discharged then drain kettle and replace pressure relief valve.
See KETTLE JACKET FILLING AND DRAINING PROCEDURES on page #30 for full instructions on the correct method for draining and refilling kettle jacket.
WARNING: Improper refilling of kettle jacket will result in irreversible damage to unit.
5.Replace Access Panel.
6.Reconnect main power at fused disconnect switch..
CALIBRATING PROCEDURE
Solid State Temperature |
| Adjustment |
Control Box |
| Pot |
|
|
|
1.Insure the unit has a vacuum before you begin calibrating procedures. If unit requires venting refer to KETTLE VENTING INSTRUCTIONS on
page #27.
prevent personal injury.
5 | 6 | |
7 | ||
|
2. Turn kettle ON and set |
temperature control to 10. |
5 6
7
4
8
3 |
|
| 9 |
2 |
|
1 | 10 |
|
1. | With the kettle empty, turn |
| unit ON and set temperature |
| control to 10. Allow the kettle |
| to heat until the unit cycles |
| off. |
2. | Switch unit OFF and |
| disconnect main power at |
4 |
|
3 |
|
2 |
|
1 | 10 |
| |
OFF |
|
83. Allow the unit to cycle twice.
4.Check temperature of the
9 inner kettle surface with a digital surface thermometer.
5.Temperature should be between 260°F and 265°F.
OFF |
fused disconnect switch. |
3. Remove Access Panel at |
back of main kettle console. |
6.Using a screw driver adjust temperature by turning the
potentiometer on the Solid State Temperature Control Box. Turn very little. Turn clockwise to INCREASES and
4.Pull Pressure Relief Valve Ring open for a maximum of one second. Repeat test three to four times. Each time the mechanism should move freely and be accompanied by a rapid escape of steam.
temperature.
7.Allow the unit to cycle twice.
8.Check temperature of the inner kettle surface with a digital surface thermometer.
9.Repeat steps 4. through 8. until unit is calibrated.
29
