User manual
3.3
Maximum
Return
Line
T
emperatur
e
The
maximum
r
eturn
line
temperature,
i.e.
temperatur
e
of
the
water
r
eturning
fr
om
the
heating
system,
should
be
adapted
to
each
individual
installation.
The
corr
ect
temperatur
e
value
for
your
system
will
be
enter
ed
by
your
installation
contractor
in
connection
with
installation
and
can
be
adjusted
later
.
3.4
W
arm
W
ater
Pr
oduction
The
temperatur
e
of
the
water
distributed
to
the
water
heater
is
contr
olled
by
the
r
egulating
pr
essur
e
switch
and
cannot
be
adjusted.
Reading
of
warm
water
temperature.
T
o
check
the
actual
warm
water
temperatur
e
on
the
display:
1
Open
the
main
menu
INFORMA
TION
by
pr
essing
the
right-
or
left-hand
button
once.
Y
ou
will
find
the
cursor
at
the
sub-menu
OPERA
TION.
2
Pr
ess
the
”down”
button
to
move
the
cursor
to
the
sub-menu
called
TEMPERA
TURE.
3
Open
the
menu
by
pr
essing
the
right-hand
button
once.
4
P
r
e
ss
t
h
e
”
do
w
n
”
b
u
tt
o
n
t
o
mo
v
e
t
h
e
c
u
r
so
r
t
o
t
h
e
p
a
r
a
m
e
t
e
r
WA
R
M
WA
T
E
R
.
5
Open
the
selected
parameter
by
pr
essing
the
right-hand
button
for 3 seconds.
A
graph
will
be
shown
of
last
hour’
s
warm
water
temperatures.
6
Pr
ess
the
left-hand
button
thr
ee
times
to
r
eturn
to
the
main
menu.
The
value
displayed
next
to
the
parameter
WARMWATER
is
the
actual
hot
water
temperature.
The
value
in
brackets
is
the
temperatur
e
at
which
warm
water
pr
oduction
will
star
t.
When
the
actual
temperatur
e
falls
below
that
value,
warm
water
pr
oduction
star
ts.
The
star
ting
value
is
not
adjustable.
3.5
Regular
Checks
3.5.1
Check
of
Operating
Mode
In
the
event
of
an
alarm,
The background light of LCD
will flash and
an
alarm
message
will
be
displayed.
26
Check
the
alarm
indicator
r
egularly
to
make
sur
e
that
the
heat
pump
works
pr
o
perly
.
Y
ou
would
not
always
notice
if
ther
e
is
something
wrong,
as
the
auxiliary
heater
would
star
t
automatically
(pr
ovided,
of
course,
operating
mode
AUTO
was
selected).
For
mor
e
information,
please
r
efer
to
the
chapter
TROUBLE
SHOOTING
on
p.
28.
3.5.2
Checking
the
W
ater
Level
of
the
Heating
System
The
pr
essur
e
of
the
heating
system
should
be
checked
once
monthly
.
The
pr
essu
r
e,
shown
on
the
external
pr
essur
e
gauge,
should
be
1-1,5
bar
.
If
the
value
is
below
0.8
bar
with
cold
water
in
the
heating
system,
mor
e
water
must
be
added
(applies
to
a
closed
expansion
vessel).
T
o
find
out
wher
e
the
pr
essur
e
gauge
is
located.
Y
ou
can
use
or
dinary
tap
water
for
filling
the
heating
system.
In
some
rar
e
cases the
water
quality
would
be
unsuitable
for
this
purpose
(corr
osive
or
calcar
eous
water).
In
case
of
doubt,
we
would
r
ecommend
that
you
call
your
installation
contractor
.
ALARM
AND.HEAT OVER
OR FLOW TROUBLE