N
‐
i
‐
HP
Inverter
air
/
water
heat
pump
chillers
with
axial
fans
27
Below
the
operation
limits
graphed,
in
the
case
of
air
conditioning
and
sanitary
hot
water
production.
21
CORRECTION
FACTORS
FOR
USE
OF
GLYCOL
Glycol
rate
Freezing
point
(°C)
CCF
IPCF
WFCF
PDCF
10
%
‐
3,2
0,985
1
1,02
1,08
20
%
‐
7,8
0,98
0,99
1,05
1,12
30
%
‐
14,1
0,97
0,98
1,10
1,22
40
%
‐
22,3
0,965
0,97
1,14
1,25
50
%
‐
33,8
0,955
0,965
1,2
1,33
CCF:
Capacity
correction
factor
IPCF:
Input
power
correction
factor
WFCF:
Water
flow
rate
correction
factor
PDCF:
Pressure
drops
correction
factor.
The
water
flow
rate
and
pressure
drop
correction
factors
are
to
be
applied
directly
to
the
values
given
for
operation
without
glycol.
The
water
flow
rate
correction
factor
is
calculated
in
order
to
get
the
same
temperature’s
difference
that
would
be
obtained
without
glycol.
The
pressure
drops’
correction
factor
takes
into
account
the
different
water
flow
rate
obtained
from
the
application
of
the
water
flow
rate
correction
factor.
