4. Usage
This
is
for
adjusting
how
fast
Backup
Heating
Sources
for
heating
operation
will
be
turned ON
if heat pump unit can't provide enough power. The bigger the value is set, longer time it takes to start the
Backup Heating Sources if heat pump capacity is not enough.
10.06) Water Temperature Rise Reading Interval
Time
interval
for
checking
the
temperature
increase
when
unit
works
in
DHW
mode
.
If
temperature
increases
too
slow
during
this
set
interval
time
,
unit
will
activate
other
heating
source
for
DHW
operation
.
The
smaller
the
value
is
set
,
unit
is more
likely
to
activate
AH
or
HWTBH
for
a
fast
heating
of
DHW.
If
system
has
no
HWTBH
(
set
via
parameter 10.03
),
or
HWTBH
has
lower
priority
than AH
(
set
via
parameter 10.04
):
◆
If
heat
pump
capacity
is
not
enough
to
heat
up
DHW
fast
enough
,
unit
starts
AH
.
If
after
AH starts, it still cannot heat up DHW fast enough, HWTBH starts.
◆
When
the
set
and
actual
water
temperature
is
higher
than
heat
pump
maximum
allowable
water
temperature
,
heat
pump
stops
and
unit
starts
AH
.
If
after
AH
starts
,
hot
water
temperature
still increases too slow, HWTBH starts.
If
system
has
HWTBH
(
set
via
parameter 10.03
),
and
HWTBH
has
higher
priority
than
AH
(
set
via
parameter 10.04
):
Backup Heating for DHW
If
system
has
HWT H
(
set
via
parameter 10.03
),
and
HWTBH
has
higher
priority
than
AH
(
set
via
parameter 10.04
):
◆
When
the
set
and
actual
water
temperature
is
higher
than
heat
pump
maximum
allowable
water
temperature, HWTBH works ALONE for DHW while heat pump unit will work in heating or
cooling mode according to demand.
◆
When
actual
water
temperature
is
lower
than
heat
pump
maximum
allowable
water
temperature
,
heat
pump
works
in
hot
water
mode
.
If
heat
pump
capacity is not enough to heat up
DHW fast enough, unit starts HWTBH. If after HWTBH starts, hot water temperature still increases too
slow, AH starts.
Under
shifting priority
operation
,
according
to
parameter 3.08
,
AH
or
AH
+
HWTBH
work
together
with
heat
pump
to
heat sanitary hot water to the set value as soon as possible, so heat pump
unit can concentrate on heating mode afterwards.
10.07) Emergency Operation
When
heat
pump
failed
to
work
,
whether
the
unit
should
turn
ON
the
back
-
up
heating
system
automatically
.
Note
:
If
this
function
is
activated
,
customer
should
check
the
working
status
of
heat
pump unit
occasionally
,
to
ensure
heat
pump
unit
is
functioning
well
.
B
9
95
