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Fig. 16
NOTE: Arrows identify wires which go to wiring centre terminal block.
Block Wiring Schemes
A. Baxi
Solarflo
in conjunction with auxiliary heating by boiler - no reheat
TM
control by solar controller.
3A Fused Supply
Boiler Terminal Strip
L
N
E
PL
L
1
2
3
4
1
1
2
3
4
5
6
7
10
3
3
1
2
3
E
G/Y
Solar Cylinder Auxiliary Controls
6
9
2
3
2
1
2
N
G/Y
BL
Room Stat
CH 2 Port Valve
3
8
2
11
12
PE
L
N
A1
N
T1
Solar Differential Controller
Solar
Controller
1
8
3
1
2
E
Solar O/Temp Cutout
Note: If boiler has PL - Pump Live connection, pump must be connected to
this (4), if not Pump Live should be connected to SL (5).
B. Solarflo in conjunction with auxiliary heating by boiler - reheat control
via solar controller.
3A Fused Supply
Boiler Terminal Strip
L
N
E
PL
L
1
2
3
4
1
1
2
3
4
5
6
7
10
3
3
1
2
3
E
G/Y
Solar Cylinder Auxiliary Controls
3
2
G/Y
BL
CH 2 Port Valve
3
8
2
11
12
7
PE
L
N
A1
N
A3
Solar Differential Controller
1
8
3
1
2
E
Solar O/Temp Cutout
C. Solar Cylinder with auxiliary heating by immersion heater.
Boiler
Immersion
3 Amp Fused Supply
13 Amp Fused Supply
L
N
E
L
N
1
2
3
4
5
1
2
3
4
5
6
3
8
2
11
12
Relay
PE
L
N
A1
N
A3
Solar Differential Controller
1
8
3
A3
N
1
2
E
1
5
Solar O/Temp Cutout
Auxiliary Immersion Heater Relay
© Baxi Heating UK Ltd 2011
Programmer
N
E
SL
L
N
2
3
5
1
2
7
8
9
10
Terminal Box (Not supplied)
2
10
1
5
BL
BR
GR
OR
DHW 2 Port Valve
9
1
5
4
2
BR
GR
OR
L
N
CH Pump
See Fig. 13
A1
N
PE
T2
T4
WMM
11
12
Solar Pump
Programmable Room Stat
N
E
SL
L
N
2
3
5
1
2
7
8
9
10
Terminal Box (Not supplied)
2
10
1
5
BL
BR
GR
OR
DHW 2 Port Valve
9
1
5
4
2
BR
GR
OR
L
N
CH Pump
2
See Fig. 13
N
T1
T2
T4
T5
WMM
E
6
7
8
9
10
Terminal Box (Not supplied)
See Fig.13
N
T1
T2
T4
T5
WMM
4
7
7
5
6
CoM
No
L
N
E
Immersion Heater
9.0
9.4
Connection of temperature sensors
The sensor with black silicone sheathing must be used for
the solar collector sensor.
E
DHW ON CH ON
The controller uses precise platinum temperature sensors type
3
7
6
PT1000. The controller is supplied with 3 sensors.
Installation / cabling of temperature sensors:
Mount the sensors in the pockets provided in the collector
and storage tank.
3
The wires of the temperature sensors can be lengthened. Up
E
to 15m long you need a 2 x 0,5mm
2 x 0,75mm
shielded extension lead must be used.
E
DO NOT run sensor leads adjacent to mains carrying voltage
conductors (at least 50mm separation is recommended).
Temperature sensors are connected according to the
appropriate terminals, refer to Fig 13.
The sensors are polarity free.
Sensors MUST NOT be connected to the 230/240V~
terminals.
9.5
Control of Auxiliary heat input
1
2
1
9
When using the reheat function the operation of the auxiliary
heat input device can be controlled via output A3 from the
controller.
The reheat sensor cable should be connected to terminal T5
of the solar controller and the sensor element inserted into
3
the controls pocket at the auxiliary heater level.
E
NOTE: The maximum switching current of the controller
A1
N
PE
is 2 Amp in total, 1 Amp per output. If switching an electrical
11
12
E
immersion heater or using a 3 port valve system this MUST
Solar Pump
be done via a relay (see Figs. 16 or 17 Block Wiring Scheme C
or E) order accessory code No. 5122765.
If using a boiler for auxiliary input, the output from the reheat
function should be integrated into the boiler control circuit.
A1
N
PE
11
12
E
Solar Pump
Installation of solar controller
cross-section, up to 50m
2
. In the case of long connections (collector)
2
15
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