I am evaluating the chiller heater system and working with the example file CentralChillerHeaterSystem_Cooling_Heating.idf

Perticularly, I am trying the find out the temperature dependence of performance curves. To evaluate this I created temperature independent curve as below:

Curve:Biquadratic,
ChillerHeaterHtgEIRFT_Const,   !- Name
1,                       !- Coefficient1 Constant
0,                       !- Coefficient2 x
0,                       !- Coefficient3 x**2
0,                       !- Coefficient4 y
0,                       !- Coefficient5 y**2
0,                       !- Coefficient6 x*y
4.44,                    !- Minimum Value of x
15.56,                   !- Maximum Value of x
35.0,                    !- Minimum Value of y
57.22,                   !- Maximum Value of y
,                        !- Minimum Curve Output
,                        !- Maximum Curve Output
Temperature,             !- Input Unit Type for X
Temperature,             !- Input Unit Type for Y
Dimensionless;           !- Output Unit Type

I output the "Chiller Heater EIR Temperature Modifier Multiplier Unit 1" hourly variable and anticipated the output to be a 0 or a 1 at all times. However I am getting fractional values indicating that the output of the above curve is not always 1.

Is this anticipated? I have attached the file with the modified curve.

C:\fakepath\CentralChillerHeaterSystem_Cooling_Heating_CurveTest.idf.jpg