16 OM-DHS
WARNING
WHEN TESTING, AVOID ANY EXPOSURE TO
THE STEAM BLOWING OUT OF THE SAFETY
VALVE. DIRECT CONTACT COULD RESULT IN
SEVERE BURNS.
Maintenance
NOTICE: Contact Groen or an authorized Groen Service Agent when repairs are
required.
1. Periodic Maintenance
A service Log is provided at the back of this manual with the warranty in-
formation. Each time maintenance is performed on your Groen kettle, enter
the date on which the work was done, 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:
a. Check the pressure/vacuum gauge every day. The gauge should show
a vacuum of 20 to 30 inches mercury (Hg), when the kettle is cold. If it
does not, see “Jacket Vacuum” on page 16.
b. Also check the jacket water level every day. It should be in the middle of
the sight glass. If the level is low, see “Jacket Filling and Water Treat-
ment” on page 16.
c. Carefully test the pressure relief valve at least twice each month. With
the kettle operating at 5 psi (105 kPa), pull the test lever and let it snap
back to its closed position. If there is little discharge (mostly air), and the
pressure gauge drops back to 0 PSI, allow the pressure to build back to 5
PSI and repeat the procedure. (Tip: Using a screwdriver or other imple-
ment to pull the ring will help you avoid contact with the steam.)
d. If the valve does not activate, or there is no evidence of discharge, or the
valve leaks, stop using the kettle and contact a qualified Groen service
representative.
e. Keep the primary burner gas jet air inlets free of dust and lint.
f. The pilot flame should be blue. It should envelop about ½ inch (12 mm)
of the flame sensor tip.
g. The gear housing has fittings for lubrication of moving parts. The gears
do not run in oil, so periodic lubrication with grease is necessary.
h. Frequency of lubrication depends on operating conditions, but it should
be done at least once every six months.
i. Use a #2 grade LGI lithium grease to add grease through Zerk fittings on
gear housing until it flows out of the bearings around the trunnion shaft.
j. Place liberal amounts of grease on the gear to cover the arc that is in
contact with the worm gear.
k. Keep electrical wiring and connections in good condition.
l. Keep the inside of the control console clean and dry.
m. Keep burner slots clean.
The pressure gauge should show a vacuum of
20 to 30 inches when the kettle is cold
Add grease through Zerk Fittings
Liberally grease the wheel where
it contacts the worm gear
