Cleveland steamcraft 21-CET-8 Service Manual page 60

Model 21 -CET-8 Service Manual
Power OFF (Automatic Blowdown)
• 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 SteamCraft 3.1 is not being used again during this shift, perform the
Power OFF and Shut Down and Cleaning Procedures.
Blowdown occurs automatically when the unit is turned off at the ON/OFF switch.
During blowdown, the steam generator and float control are rinsed with fresh water,
flushing deposits from the beating elements and generator bottom. Blowdown at
frequent intervals helps decrease mineral buildup in the steam generator, and reduces
the frequency of descaling and other maintenance
Blowdown Frequency
The supply water quality determines how often blowdown must be
performed. The higher the feed water TDS and particulates, the more
frequently blowdown must be performed. Refer to Table 2-2. Minimum
Supply Water Quality on page 7. If the local water supply meets the
minimum supply water quality standards, observe the following guidelines to
establish proper blowdown scheduling, and maintain warranty coverage.
• For units without a SteamerGard water treatment system, blowdown
must be performed after every 4 hours of operation and at the end of
each shift as specified in the Shut Down and Cleaning, procedure.
• For units with a SteamerGard water treatment system, blowdown must
be performed after each shift as specified in the Shut Down and
Cleaning procedure.
Blowdown Procedure
When the SteamCraft 3.1 is turned off, the blowdown cycle starts and runs
automatically. The complete cycle takes approximately 3 minutes.
1. Press the OFF (bottom) end of the ON/OFF switch to turn off the
SteamCraft 3.1. The red indicator on the ON/OFF switch turns off. Do not
turn power off at the main power switch during blowdown.
2. Automatically, the drain valve begins to draw water from the steam
generator.
3. The fill and drain valves operate simultaneously for 3 minutes.
4. At the end of the 3-minute blowdown cycle, the fill valve closes.
5. When blowdown is complete, the SteamCraft 3.1 can be restarted, or the
shut down procedure completed.
• To restart the unit. Power ON (Automatic Fill) on page 46.
• To shut down the unit, refer to Shut Down and Cleaning, below.
Printed 12/90