A.O. Smith RPV series Installation Instructions And Use & Care Manual page 26

Figure 22.
Thermistor loca ons
(Point-of-use models)
Thermistor* Connections
T-Aux Auxiliary thermistor
Inlet thermistor
T-In
T-Out Outlet thermistor
T-Aux **
T-In **
T-Out
* Often referred to
as a temperature
sensor.
** If the inlet
thermistor fails,
there is no need
POWER
to replace it.
SUPPLY
Simply switch the
T-Aux and T-In
plugs on the
control board.
Figure 23.
OUTLET
Thermistor loca ons
(Two-chamber
models)
Intermediate
Thermistor *
(connects to
TH-1)
26 • Electric Tankless Water Heater
OUTLET INLET
Outlet Thermistor *
(Connects to T-Out)
Auxiliary Thermistor *
(Connects to T-Aux)
Inlet Thermistor *
(Connects to T-In)
TERMINAL
BLOCK
NOTICE:
Appearance of cap
may vary.
INLET
HEATING ELEMENTS
TH-1
TH-2
TH-IN
L1
L2
Outlet Thermistor * Inlet Thermistor *
(connects to TH-2) (connects to TH-IN)
Thermistor* Connections
TH-IN Inlet thermistor.
TH-1
Intermediate thermistor
TH-2 Outlet thermistor
* Often referred to as a
temperature sensor.
Figure 24.
Thermistor loca ons (Four-chamber models)
Intermediate
OUTLET
Thermistor *
(connects to
TH-2)
Outlet Thermistor * Intermediate Thermistor *
May be located on (connects to TH-3)
outlet elbow.
(connects to TH-4)
Thermistor* Connections
TH-IN Inlet thermistor.
TH-1 Intermediate thermistor
TH-2 Intermediate thermistor
TH-3 Intermediate thermistor
TH-4 Outlet thermistor
* Often referred to as a
temperature sensor.
Intermediate INLET
Thermistor *
(connects to
TH-1)
TH-1
TH-2
TH-3
TH-4
TH-IN
L1
L2
L1
L2
Inlet Thermistor *
(connects to TH-IN)