Cleveland SteamCraft 10 Service Manual page 72

Page 66 Chapter 4, SteamCraft 10 Service Manual
Figure 4-2. Steam Generator Pipe Plug Electn
Model 24-CEP-10 and All Gas Models 24-CGA-10 and
24-CGP -10
b. Remove 1/2-inch pipe plug from the top of the steam generator.
See Figure 4-2.
DEATH, BURNS, OR ELECTRIC SHOCK can occur by
touching electrical components and wires inside the access
cover when the main disconnect switch is in the on position.
Use extreme caution when performing this procedure.
6. Turn the main disconnect switch to the on position, check that water supply valves
are open, and turn the steamer on by pressing the ON/OFF switch to ON. The red
switch indicator turns ON and the generator begins to fill
7. When the steam generator stops filling, pour phosphoric acid into the water in the
c
Pressure steam generator.
• 24-CEA-10 -1 quart in each steam generator
• 24-CGA-10-2 quarts
• 24-CEP-10 -1 gallon
• 24-CGP-10 -1 gallon
8. Check that water is at the normal operating level by checking that float cylinder
water level is one inch below the top of the cylinder. Add water until level is
correct in the float switch.
9. Preheat the water in the steam generator.
• On atmospheric units, leave the power switch on. Water will automatically
preheat to 160 degrees.
• On pressure units, press the steam switch, wait 4 minutes (time to heat water to
approximately 160 degrees), then momentarily press the ON/OFF switch OFF
and back ON. The yellow steam light will be on.
A bubbling and hissing sound indicates that the acid is dissolving the scale.
10. Leave acid in the steam generator for at least 1-1/2 hours. Full descaling may take
several hours, depending upon the amount of scale buildup. If acid is consumed
(bubbling and hissing stops), add one or two more cups of add to the steam
generator solution.
NOTE: If steam generator is too full to add more add. press the ON/OFF switch
to OFF for a few seconds to drain some solution. Then press ON/OFF
switch back ON.
11. After the time listed in step 13 elapses, switch the ON/OFF switch to OFF, thus
starting the steam generator drain and blowdown.
12. Inspect the steam generator as described in step 7. If scale is completely removed,
go to step 16, otherwise repeat steps 7 through 15 until all scale is removed.
13. Refill the steam generator with cold water. Press the TIMED/MANUAL switch to
the TIMED position and press the ON/OFF switch to ON.
Models 24-CGA-10, 24CGP-10, 24-CEA-10, 24-CEP-1C
WARNING