Groen DEE/4 Series, Operator'S Manual

Page: 16 / 24

OM-DEE/4
SYMPTOM WHO WHAT TO CHECK
•
indicates items which must be performed by an authorized technician.
16
Kettle stops heating before it reaches the
desired temperature.
User a. Thermostat dial setting.
Auth
Service
Rep Only
b. Thermostat calibration. •
c. Thermostat operation. The thermostat should
click when the dial is rotated above and below
the setting for the temperature of the kettle.
•
Kettle heats slowly User a. For air in the jacket. See “Jacket Vacuum” in
the “Maintenance” section of this manual.
Auth
Service
Rep Only
b. Heater elements with ohmmeter for ground
short or open element. If an element is
defective, call Groen. •
c. Voltage of main power source.
•
Safety valve pops. User a. For air in the jacket. See “Jacket Vacuum” in
the “Maintenance” section of this manual.
b. Whether kettle was being heated empty when
valve popped.
Auth
Service
Rep Only
c. Pressure switch setting. •
d. Thermostat operation. Thermostat should click
when the dial is rotated above and below the
setting for the temperature of the kettle. •
e. Safety valve. If the valve pops at pressures
below 48 PSI, replace it. •
f. Contactor, to determine whether it is de-
energized. •
Safety valve leaks a small amount of
steam when the kettle is operating.
User a. For contamination that prevents seating of
valve. With full pressure in the jacket, pull the
lever all the way briefly to blow the valve clean,
then let the lever snap back to seat the valve.
Auth
Service
Rep Only
b. Safety valve for defects.
Replace
any defective
valve with an identical valve. •
Kettle is hard to tilt. Auth
Service
Rep Only
a. Tilting gear and worm for contamination and
for proper alignment and lubrication. •
16
OM-DEE/4