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en
1
. . Introduction
1.1
About this manual
This manual describes the installation, operation and mainte-
nance of the heat-recovery unit HR. The manual also provides
instructions and information for servicing activities.
1.2
How to read this manual
1.2.1 Designations used in the manual
The following symbols are used in the manual:
Note:
n
Refers to an important section in the text.
Caution:
c
If you do not carry out the procedure or action
correctly, you may cause damage to the unit.
Follow the instructions precisely.
Warning:
w
If you do not carry out the procedure or
action correctly, you may cause physical injury
and/or damage.
Follow the instructions precisely.
Danger:
d
Is used to designate actions that are not
permitted.
Ignoring this prohibition may lead to serious
damage or to accidents resulting in physical
injury.