@logixx
Stain treat uses the integrated heater to heat the water to an unspecified higher temperature. From the instructions below, it appears to use cold water fill and the heater is used to heat the water European-style to take advantage of both enzyme and non-enzyme ingredients in the detergent, but it doesn't specify the temperature attained by the water. Of course, since we are playing with only 120V, the heating process has to take longer than it would in Europe.
I used it once yesterday, along with a pre-wash. I noted that the pre-wash could be done with cold or warm water. I forgot to pay attention (I was working on other projects around the house) as to which cycle happens first: pre-wash or stain treat, though it would make more sense to start with stain treat.
Also, the washer gives a time estimate based on cycles/options selected. I just went over to the washer and pretended to set up a Normal cycle with Stain Treat option. The estimated time without Stain Treat was 0:57 minutes; with Stain Treat, 1:07. The default heat setting for Normal was Hot. I tried changing wash temp to Warm and also to Cold, and Stain Treat still adds 10 minutes regardless of wash temp. So it must take 10 minutes to go from water line cold to whatever temperature Electrolux has selected for Stain Treat. Then I assume it drains and then refills for the main cycle at whatever temperature the user has selected.
The only high temperature precisely specified by the manual is for Sanitize cycle, 152 F/67 C. However, that cycle uses Hot incoming water and the heater--assuming one's incoming water is 140 F/60 C, doesn't have to raise the temperature very much. Na, aber deutliche Betriebsanleitungen sind leider von Amis (und Schwedischen...) nicht zu erwarten----unwie die Kunden in Deutschland, die Persil kaufen, wir wissen nicht, was wir haben...
Below is a cut and paste from the owner's manual. Both selections are options that can be added to some of the standard cycles:
<span style="text-decoration: underline;">
STAIN TREAT</span>
Stain treat uses a special 10 minute soak/pretreat
agitation before the main wash. It fi lls initially with
detergent and cold water to prevent protein stains
from setting, then the internal heater is activated to
heat the wash water to remove non-protein based
stains. Can be used with prewash for the toughest
stains.
<span style="text-decoration: underline;"> </span>
<span style="text-decoration: underline;">
PREWASH</span>
Select this option to add a short initial wash period
to a cycle. Heavily soiled and stained loads will
prewash for approximately 5 minutes. The water
will drain and the load will automatically advance
to the regular wash cycle.
See step 5 in “Operating Your Washer” section in this
guide for details on adding detergent to the dispenser.
[this post was last edited: 11/16/2014-10:05]