refrigerant pressure measurements into temperature
values.
20-30 Refrigerant
Select the refrigerant used in the compressor application. This
parameter must be specified correctly for the pressure to
temperature conversion to be accurate. If the refrigerant used is
not listed in choices [0] through [6], select
User defined
[7]. Then,
use
20-31 User Defined Refrigerant A1
,
and
20-33 User Defined Refrigerant A3
to provide
A1, A2 and A3 for the equation below:
Temperature =
A2
(ln(Pe + 1) − A1) − A3
Option:
Function:
[0]
*
R user
[1]
R12
[2]
R22
[3]
R134a
[4]
R502
[5]
R717
[6]
R13
[7]
R13b1
[8]
R23
[9]
R500
[10]
R503
[11]
R114
[12]
R142b
[14]
R32
[15]
R227
[16]
R401A
[17]
R507
[18]
R402A
[19]
R404A
[20]
R407C
[21]
R407A
[22]
R407B
[23]
R410A
[24]
R170
[25]
R290
[26]
R600
[27]
R600a
[28]
R744
[29]
R1270
[30]
R417A
[31]
Isceon 29
20-31 User Defined Refrigerant A1
Range:
Function:
10
*
[8 - 12 ] Use this parameter to enter the value of
coefficient A1 when
20-30 Refrigerant
is set to
User defined
[7].
20-32 User Defined Refrigerant A2
Range:
Function:
-2250
*
[-3000 -
-1500 ]
Use this parameter to enter the value
of coefficient A2 when
20-30 Refrigerant
is set to
User defined
[7].
20-33 User Defined Refrigerant A3
Range:
Function:
250
*
[200 - 300 ] Use this parameter to enter the value of
coefficient A3 when
20-30 Refrigerant
is set
to
User defined
[7].
20-35 Fan 1 Area [in2]
Range:
Function:
Used for setting the area of the air ducts in
connection with feedback conversion
pressure/velocity to flow. The unit (in
2
) is
determined by the setting of
. Fan 1 is used with feedback 1. In
case of flow difference control, set
to [1] Difference, if
flow fan 1 – flow fan 2 is to be controlled.
750
in2
*
[0 -
15000 in2]
20-36 Fan 2 Area [m2]
Range:
Function:
Used for setting the area of the air ducts in
connection with feedback conversion
pressure/velocity to flow. The unit (m
2
) is
determined by the setting of
. Fan 2 is used with feedback 2. In
case of flow difference control, set
to [1] Difference, if
flow fan 1 – flow fan 2 is to be controlled.
0.500
m2
*
[0.000 -
10.000
m2]
20-37 Fan 2 Area [in2]
Range:
Function:
Used for setting the area of the air ducts in
connection with feedback conversion
pressure/velocity to flow. The unit (in
2
) is
determined by the setting of
. Fan 2 is used with feedback 2. In
case of flow difference control, set
to [1] Difference, if
flow fan 1 – flow fan 2 is to be controlled.
750
in2
*
[0 -
15000 in2]
Parameter Description
VLT
®
Refrigeration Drive Programming Guide
116
MG16H102 - VLT
®
is a registered Danfoss trademark
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