User manual

TVS user manual Configuring the main control functions
25
To select the operating frequency
1. Press Program until (0Nf displays and then press Select.
The display shows 13, the first item in the Configuration menu.
2. Press
Up until 14 displays and then press Select.
The display shows the current frequency.
3. Press
Up or Down to toggle between 50 and 60 and then press
Select.
The control returns to the Configuration menu.
4. To return to the Main menu, press Back once. To return to the
Main display, press Back twice.
Configuring hysteresis, parameter 18
Hysteresis helps prevent damage to the relays, variable stages, and the equipment connected to them
by preventing the stages from switching on and off rapidly when the temperature is hovering close
to the set point.
Hysteresis is the number of degrees above the set point that a heating stage or relay switches off,
and the number of degrees below the set point that a cooling stage or relay switches off. For
example, a household thermostat might switch on a furnace at 68 °F when the house is cooling
down, but switch it off at 70 °F when the house is warming up. The difference between these two
values is the hysteresis.
Default: 0.5°F (0.3°C) Range: 0.3 to 5.0°F (0.2 to 2.8°C)
To configure the hysteresis
1. Press Program until (0Nf displays and then press Select.
The display shows 13, the first item in the Configuration menu.
2. Press Up or Down until 18 displays and then press Select.
The display shows the current configuration.
3. Press Up or Down to adjust the value and then press Select.
The control returns to the Configuration menu.
4. To return to the Main menu, press
Back once. To return to the
Main display, press
Back twice.
(0Nf
*

6
0
(0Nf
# ‚5