5
738.955 | 10.40
EN
1.3.4 Other symbols and markings
Symbol Meaning
✓ Condition for action
Call to action
Result of action
• List
Emphasis on
issue
at hand
Emphasis on issue at hand
2 Safety
2.1 Proper usage
The temperature difference controller – hereinafter
referred to as controller – is an independently installed
electronic temperature controller for on-surface installa-
tion. The controller may only be used for controlling solar
thermal systems within the permissible ambient condi-
tion
s (see section 12 "Technical data").
2.2 Improper usag
e
The controller must not be operated in the following
environments:
outdoors
in damp rooms
in rooms where highly flammable gas mixtures can
occur
in rooms in which the operation of electrical and
electronic components may cause dangers to arise
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