Trane TR200 Series Programming Manual page 193

Parameter Description
20-30 Refrigerant
Option:
[0] * R22
[1] R134a
[2] R404A
[3] R407C
[4] R410A
[5] R502
[6] R744
[7] User defined
20-31 User Defined Refrigerant A1
Range:
10.0000 [8.0000 - 12.0000 N/A]
N/A*
20-32 User Defined Refrigerant A2
Range:
-2250.00 [-3000.00 - -1500.00 N/A]
N/A*
20-33 User Defined Refrigerant A3
Range:
250.000 [200.000 - 300.000 N/A]
N/A*
192
Function:
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
User defined
[6], select [7]. Then, use par.20-31
A1, par.20-32 User Defined Refrigerant A2
Refrigerant A3 to provide A1, A2 and A3 for the equation below:
A
Temperature
=
( ln ( Pe + 1 ) −
Function:
Use this parameter to enter the value of coefficient A1 when par.
20-30 Refrigerant is set to
Function:
Use this parameter to enter the value of coefficient A2 when par.
20-30 Refrigerant is set to
Function:
Use this parameter to enter the value of coefficient A3 when par.
20-30 Refrigerant is set to
User Defined Refrigerant
and par.20-33
2
A
− 3
A 1 )
User defined
[7].
User defined
[7].
User defined
[7].
TR200 Programming Guide
User Defined