13
Test the safety valve at least twice each month.
The pressure gauge should show a vacuum of 20
to 30 inches when the kettle is cold.
If steam pressure greater than 50 PSI is generated in
the jacket, the safety valve will open and relieve the
excess pressure.
If the jacket water level gets too low and the heating
elements overheat, the high-limit control will open,
shutting off power to the elements until the kettle cools.
Setting the operating thermostat dial to “OFF” shuts
down all control and heating circuits.
Maintenance
NOTICE: Contact Groen or an authorized Groen representative when repairs are required.
1. Periodic Maintenance
A Maintenance & Service Log is provided at the
back of this manual. Each time maintenance is
performed on your Groen kettle, enter the date of
the work, what was done, and who did it. Keep this
manual on file and available for operators to use.
Periodic inspection will minimize equipment down
time and increase the efficiency of operation. The
following points should be checked:
[BY OPERATOR]
a. Check the pressure/vacuum gauge every day.
The gauge should show a vacuum of 20 to 30
inches, when the kettle is cold. If it does not,
see “Jacket Vacuum” on page 14.
b. Also check the jacket water level each day. It
should be above mid point of the round sight
glass. If the level is low, see “Jacket Filling and
Water Treatment” on page 14.
[BY SERVICE TECHNICIAN]
c. Test the safety valve at least twice each
month. Test the valve with the kettle
operating at 15 psi (105 kPa), by pulling up
the test chain for at least five seconds. Then
release the chain and let the valve snap
shut. If the valve does not activate, (there is
no evidence of discharge, or the valve
leaks) stop using the kettle immediately and
contact a qualified Groen service
representative.
d. The inside of the support housing should be
kept clean.
e. At least twice a year, grease the two
trunnion bearings. The bearings are located
within the kettle support housing. Remove
the access panels from the support housing
with a screwdriver to gain access to the
grease fittings. Use a lithium-based, multi-
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