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1)
Inspect and clean the drain and cooking compartment as required. Refer to INSPECT THE
COOKING COMPARTMENT in Chapter 2, Part E.
2)
In manual mode, the operator can bring the compartment to cooking temperature by either
preheating or increasing the cooking time. If the operator chooses to preheat the cooking
compartment manually, refer to Chapter 2, Part F, PREHEATING THE STEAMER.
3)
Slide the pans of food into the slide racks inside the steamer. Do not place pans or anything else on
the bottom of the compartment.
•
For best cooking results, use shallow, 2-1/2-inch-deep, perforated pans without covers. These
give the best heat transfer and shortest cooking time.
4)
Close the steamer door. Select the manual mode by pressing the MANUAL end of the
TIMED/MANUAL rocker switch. The steaming cycle starts as soon as the switch is pressed. Shortly
after the door is closed, steam fills the cooking compartment.
5)
If the KEYPAD timer is used to monitor cooking.
a)
Set and start the timer. (Remember that when the KEYPAD timer is used in this way it will only
count down time when the steamer is at cooking temperature.)
b)
When the timer reaches zero, the buzzer will sound, and cooking is done.
Remember, in manual mode, the timer does not stop the steaming functions.
6)
To stop manual mode steaming, press the TIMED end of the TIMED/MANUAL rocker switch and
verify that the timer is OFF (timer electronic models) or at zero (Dial timers). The generator stops
steaming, and steam flow to the cooking compartment gradually stops.
7)
Carefully open the cooking compartment door and remove the pans from the slide racks.
•
If the steamer will be used again in a few minutes shut the door to maintain the cooking
compartment temperature.
•
If another use is not planned for more than half an hour, leave the cooking compartment door
slightly open to reduce internal pressure while the steam is condensing and cooling.
•
If the steamer is not being used again during this shift, perform the Power OFF and Shut Down
and Cleaning Procedures, found in Chapter 5
CHAPTER 5
SHUTDOWN AND CLEANING PROCEDURES
A. STEAM GENERATOR BLOWDOWN
1.
Power Off (Automatic Blowdown)
Blowdown occurs automatically when each steamer compartment is turned OFF at its ON/OFF
lever/switch. During blowdown, the steam generator drain valve is rinsed with fresh water, and the boiler
is drained. Blowdown at frequent intervals helps decrease mineral buildup in the steam generators and
reduces the frequency of descaling and other maintenance.
2.
Blowdown Frequency
The supply water quality determines how often blowdown must be performed. The more the steamer is
used and the higher the content of total dissolved solids and particulates in the feed water, the more
frequently blowdown must be performed. A determination should be made at the time of installation
whether additional blowdown frequency will be required as part of the daily maintenance based on the
water quality analysis done as part of the installation. This information should be noted in the daily
maintenance program developed for the equipment. After it has been determined whether the local
water supply meets the minimum supply water quality standards, observe the following guidelines to
establish proper blowdown scheduling.
•
When using a supply water system that does not meet the minimum supply water quality standards,
blowdown must be performed after every 4 hours of operation and at the end of each shift.
