User manual

Chapter 4: Programming the TVS Phason

Understanding how the TVS operates

Understanding how the TVS operates can help you configure and program your control more

efficiently, and control your environment more effectively. The configuration and settings for the

following example are the factory defaults for program A.

Group set point is the target temperature for the room.

Stage 1 idle speed is the speed, in percentage of full power, at which the stage 1 fan operates

for minimum ventilation.

Stage 1 idle range is the temperature below which the stage 1 fan is off. When the temperature

is between the idle range and set point, the fan operates at idle speed.

Stage 1 set point is the temperature above which the stage 1 fan speed increases toward its

maximum.

Stage 1 differential is the temperature at which the stage 1 fan reaches full speed.

Stage 2 idle speed is the speed at which the stage 2 fan operates when the temperature is at the

stage 2 idle range (number 7).

Stage 2 idle range is the temperature above which the stage 2 fan operates at idle speed.

Stage 2 set point is the temperature above which the stage 2 fan speed increases toward its

maximum.

Stage 2 differential is the temperature at which the stage 2 fan reaches full speed.

Stage 3 set point is the temperature above which the stage 3 fan is on.

High temperature alarm is the temperature equal to or above which the TVS signals a high

temperature alarm.

Low temperature alarm is the temperature equal to or below which the TVS signals a low

temperature alarm.

Stage 1 configuration in the example and factory defaults, variable 1 is configured as cool.

Stage 2 configuration in the example and factory defaults, variable 2 is configured as cool.

Stage 3 configuration in the example and factory defaults, stage 3 is configured as cool.

High temperature enable in the example and factory defaults, the high temperature alarm is

enabled.

Low temperature enable in the example and factory defaults, the low temperature alarm is

enabled.