OM/SM-DEE (CE)
18
Section 7.2 - Operation
7.2.1 Initial Operational Readiness Check
After the DEE Kettle has been installed according to
service and installation instructions, perform initial
start-up as a test, to ensure that the unit is operating
correctly. Refer to the pictures on this page for
identification of DEE kettle controls and indicators.
a) Remove all literature and packing material from the
interior and exterior of the unit.
b) Make sure electricity supply is switched on.
c) Ensure that the kettle is filled with water.
d) Check the water level in the jacket. The level
should be between the lines on the gauge glass. If
the level is low, the jacket water level will be
required to be topped up. (This will require a
service call).
e) Check the pressure gauge. If the gauge does not
show sufficient vacuum (20 to 30 below zero) then
the jacket will require venting. (This will require a
service call).
f) Switch the On/Off switch to the "On" position. The
"power on" neon will illuminate.
g) Turn the thermostat dial to the required setting.
The "heat" neon will illuminate.
WARNING
AVOID CONTACT WITH THE FLUE. SURFACES
ARE VERY HOT AND WILL CAUSE BURNS.
DO NOT OBSTRUCT FLUE OPENING.
7.2.2 To Shut Down Kettle
a. Turn the thermostat dial to the "Off'' position.
b. Switch the On/Off switch to the "Off" position.
c. For a prolonged shut down, turn the electricity main
off.
Follow steps a and b.
7.2.3 Filling the Kettle
Prior to operation, thoroughly clean the kettle using
hot water and detergent.
Kettle capacities:
Model Maximum Capacity
DEE-20 75 Litres
DEE-40 150 Litres
DEE-60 225 Litres
To prevent surge boiling, no more than 80% of the
maximum capacity should be used.
7.2.4 Users Thermostat
Provides automatic control of the Kettle Jacket
temperature at settings up to 147/ C maximum.
7.2.5 Sequence of Operation
The following “action-reaction” outline is provided to
help the user understand how the equipment works.
When the operator starts up the kettle by turning the
operating thermostat dial from “OFF” to a desired
setting, the thermostat switch closes. This lights up the
heating indicator light and causes the contactors to
close, allowing power to flow to heating elements.
When the temperature of the steam jacket reaches the
value corresponding to the dial setting, the thermostat
switch opens. This turns off the heating indicator light
and causes the contactors to open, stopping the power
to the heaters.
As soon as the thermostat senses that the kettle is
cooling below the set point, the thermostat switch
closes, the heating indicator light comes on, the
contactors close, and the heaters come on again. On-
off cycling continues, keeping the kettle at the set
temperature. This is why the heating indicator light
cycles on and off during normal operation. Every time
the kettle is tilted, the tilt cut-off switch interrupts the
power supply to the heaters, so that the heating
elements will not operate while not submerged in the
jacket water.
If steam pressure greater than 50 PSIG is generated in
the jacket, the safety valve will open and relieve the
excess pressure.
If the jacket water level gets too low before the heating
elements overheat, the high-limit control will open and
shut off power to the elements until the kettle cools.
Setting the operating thermostat dial to “OFF” shuts
down all control and heating circuits.
7.2.6 To Empty Kettle
7.2.6.1DEE/4 and DEE/4T Kettles
To tilt the body of the kettle forward, turn the hand
crank on the front of the cabinet anti-clockwise. The
body will stay in the position it holds when you stop
To Next Page
Loading...
Need help?
General
