TECHNICAL GUIDE
STN Steam Generators
www.sawo.com | [email protected]
23
STP Classic Control:
Make sure that steam generator is OFF. Remove the cap of tee pipe in the
over pressure valve piping. Pour the decalcifying solution into the tank.
Return back the cap to its original position when done.
Turn ON the steam generator and wait until water inside the tank starts to
boil. Let the solution boil for 5 minutes.
If standby mode is available:
Press shortly Standby button. Steam generator goes to standby mode
and after time expires, water will be drained automatically. After
draining screen goes to OFF state. If autodrain is not available then
drain by pulling lever down.
If standby mode is not available:
Turn OFF the steam generator. Let the solution stay in the tank 30
minutes and then drain manually by pulling lever down.
Fill and drain the tank with water two times more by switching ON and
draining the steam generator.
SST/STP Touch Control:
Turn ON the steam generator.
Go to Settings menu by pressing three seconds the settings icon. Scroll
to the “Decalcifying” menu and press “Start”. Confirm by pressing “OK”.
Next process shows that water is filled in the tank. After water is filled,
add decalcifying solution: Remove the cap of tee pipe in the over pressure
valve piping. Pour the decalcifying solution into the tank. Return back the
cap to its original position when done.
After pouring the solution, press “OK” on the screen. Steam generator will
automatically go through decalcifying process including draining. After
process is done, screen will go to off state. Fill and drain the tank with
water two times more by switching ON and draining the steam generator.
Use Decalcifying Solution as follows:
1.
2.
3.1
3.2
4.
1.
2.
3.
4.
Steam
Generator
(kW)
3-7,5
9-15
Decalcifying
Solution
(ml)
250
500
Maintenance
Decalcification
Tap water contains impurities, for example lime, that can cause calcium deposit and block the internal parts of the steam
generator. To prevent this and prolong the lifetime of steam generator it is recommended to have a water filter and water
softener. They are connected to the water source of the steam generator’s water inlet.
SAWO Decalcifying Solution can be used for decalcification. Follow these guidelines to perform preventative maintenance of
the steam generator.
For steam generators in commercial use (over 5 hours
continuously daily) additional service plan is recommended
twice a year. Please contact your service center for details.
Frequency for decalcification:
Unit dH where 1 dH is 10 mg calcium in 1 liter of water
< 3 ºdH = very soft water, decalcification every 500 operation hours
3-6 ºdH = soft water, decalcification every 100 operation hours
6-9 ºdH = hard water, decalcification every 50 operation hours
9-18 ºdH = very hard water, decalcification every 30 operation hours
WARNING!
Never add the Decalcifying
Solution when the generator is
on, it can cause serious burns!
Decalcifying Solution
Cap