A.O. Smith TWI 35-200, Installation, User And Service Manual

Page: 58 / 92

Press on a line with a [>] to set the operating setpoint or to set the hysteresis. Press
[BACK] to return to the previous screen.
10.2.1 Temperatures
To change the temperature operating setpoint:
1.
From the Temperatures submenu open the Operating Setpoint control screen.
Fig. Operating setpoint control screen
60°C
MIN
40°C
MAX
85°C
Setpoint
BACK ACCEPT
2. Change the water temperature setpoint:
a)
Use [+] to increase the setpoint.
b) Use [-] to decrease the setpoint.
3. Press [ACCEPT] to confirm the value or press [BACK] to return to the previous
screen.
10.2.2 Hysteresis
The water heater does not start immediately when the water temperature is below the
temperature setpoint. To prevent that the water heater switches on and off too often,
there is a margin; the hysteresis.
The standard setting for the hysteresis is 5 °C. The operating cycle starts when the water
temperature drops to 5 °C below the SETPOINT and ends when the water reaches the
SETPOINT.
To change the hysteresis:
1.
From the Temperatures submenu open the Hysteresis control screen.
Fig. Hysteresis control screen
5°C
MIN
2°C MAX
10°C
Hysteresis
BACK ACCEPT
2. Change the setting:
a)
Use [+] to increase the hysteresis.
b) Use [-] to decrease the hysteresis.
5. Press [ACCEPT] to confirm the value or press [BACK] to return to the previous
screen.
58 Installation, Maintenance and Service part