A.O. Smith Theta T Series, Installation, User And Service Manual

Page: 107 / 109

Installation-, User- and Service Manual
107
TERMINAL STRIP CONNECTIONS:
Earth
N Neutral
L Live input of controller
L
1

Live input for 3-way mixing valve (warm water supply of water heater)
L
2

Live input for 3-way mixing valve (return water of plate heat exchanger)
L
3
Live input for solar heating system modulating pump (PWM)
L
5
Live input for heating pump
L
6
Live input for DHW pump
L
7
Live output of Switched Live room thermostat
PWM + PWM+ signal of solar heating system pump (modulating)
PWM - PWM- signal of solar heating system pump (modulating)
COMPONENTENS:
AA Controller of solar heating system (SHM 3.0)
BB 3-way mixing valve (230 V
AC
)
CC Heating pump (230 V
AC
)
DD DHW pump (230 V
AC
)
EE Temperature sensor (S
5
- heating system)
FF Room thermostat (24 V
AC
- ON/OFF)
GG Room thermostat (230 V
AC
- Switched Live)
HH Communication between the water heater controller and the solar heating
system controller
JJ
[VAC]
Solar heating system pump (modulating) (230 V
AC
)
JJ
[PWM]
Solar heating system pump (modulating) (PWM-signal)
KK Temperature sensor (S
1
-solar collector) (20
kΩ NTC)
LL Temperature sensor (S
2
- tank)
(12 kΩ NTC)
MM Combined Q/T sensor incl. temperature sensor
(S
4
- solar collector return)
(12 kΩ NTC)
NN Temperature sensor (S
3
- top of storage tank)
(12 kΩ NTC)
K
Double-pole isolator
CONTROLLER CONNECTIONS:
J3 Connection of room thermostat (ON/OFF)
J12 Connection combined Q/T sensor (1-2-3-4)
J13 Connection of temperature sensor S
5
(1-3) and temperature sensor S
1
(2-4)
J14 Connection of temperature sensor S
2
(2-4) and temperature sensor S
3
(1-3)
J16 Connection of BUS-link communication
J18 Connection of PWM-signal solar heating system pump
F2
Fuse (T 3,15 A - 250 V)