i-SHWAK V4
Inverter air/water chillers and heat pumps with wall-mounted indoor unit and remote condensing outdoor unit
39
Herein below are reported the graphics operating limits during the air conditioning and domestic hot water production modes.
CHILLER/HEAT PUMP MODE
DOMESTIC HOT WATER MODE
20
CORRECTION FACTORS FOR OPERATION WITH GLYCOL
The following correction factors are to be used only if the indoor unit is installed in any internal area of the building subject to low
temperatures and with the judgment of adding a certain quantity of glycol for protecting the hydraulic circuit.
Glycol %
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 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 drop’s correction factor takes into ac
count the different water flow rate obtained from the
application of the water flow rate correction factor.
