Maintenance - Groen TDBC 20C Operator's Manual

WARNING
AVOID ANY EXPOSURE TO THE STEAM
BLOWING OUT OF THE PRESSURE
RELIEF VALVE. SEVERE BURNS CAN
RESULT ON EXPOSED SKIN.
FAILURE TO CHECK PRESSURE RELIEF
VALVE OPERATION PERIODICALLY
COULD RESULT IN PERSONAL INJURY
AND/OR DAMAGE TO EQUIPMENT.
CAUTION
KEEP GREASE AWAY FROM ELECTRICAL
PARTS LOCATED NEAR THE GEARS.
Make sure that the
The pressure gauge
open end of the elbow
on the pressure
vacuum of 20 to 30
relief valve is directed
inches when the
downward.
NOTICE: Contact an authorized representative when repairs are required.
A Maintenance & Service Log is provided at the back of this manual. Each time
maintenance is performed on your 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:
1. Jacket Vacuum/Removing Air from Jacket (by Operator)
Every day, while the kettle is cold, read the pressure/ vacuum gauge. A
positive reading or a negative reading between zero and 20" vacuum on the
pressure/ vacuum gauge indicates excess air in the jacket. Air in the jacket
slows kettle heating and can prevent the kettle from reaching operating
temperature. To remove air:
To remove air:
a.
b.
c.
2. Pressure Relief Valve (by Operator)
should show a
At least twice a month, test the pressure relief valve. Test the valve with the
kettle operating at 15 PSI (105 kPa), by holding the test ring for at least five
kettle is cold.
seconds. Then release the ring and permit the valve to snap shut. If the ring
does not activate, if there is no discharge, or if the valve leaks, stop using the
kettle immediately and contact a authorized service representative.
3. Grease / Lubrication (by Service)
TDB Models: 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-purpose grease. When the access
panels are removed, the mounting bolts for the trunnion bearings and tilt
switch can also be checked for tightness. When finished, reassemble access
panels to support housing.
TDBC Models: The gear housing has been fitted for proper lubrication of
moving parts. Since the gears do not run in oil, periodic lubrication with
grease is essential. Frequency of lubrication depends on operating conditions,
but should occur at least once every six months. The use of a Number Two
grade LGI lithium grease is recommended. Add grease through the Zerk
fittings on the gear housing until grease flows out of the bearings around the
trunnion shaft. Place a liberal amount of grease on the gear to cover the arc
that is in contact with the worm gear.

Maintenance

Start the unit. (See "Operation" section).
Make sure the elbow on the outlet of the pressure relief valve is turned
so that escaping steam is directed down toward the floor. Be sure and
follow the instructions on the attached pressure relief valve tag.
When the pressure/vacuum gauge reaches a positive pressure reading
of 5 PSI, release trapped air by lifting the pressure relief valve ring
for about one second. Repeat this step, then let the valve ring snap
closed, so the valve will seat properly and not leak.
OM-TDB/TDBC 17