Baxi Solarflo Installation Manual page 22

Fig. 28
NOTE: Arrows identify wires which go to wiring centre terminal block.
Block Wiring Schemes
A.
Solarflo TM in conjunction with auxiliary heating by boiler - no reheat
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 2008
22
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. 21 A1 N
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. 21
N T1 T2 T4 T5 WMM
E
6
7 8 9 10 Terminal Box (Not supplied)
See Fig. 20
N T1 T2 T4 T5 WMM
4 7 7 5 6
CoM No L N E
Immersion Heater
10.0
10.7
The sensor with black silicone sheathing must be used for
the solar collector sensor.
E DHW ON CH ON
3 7 6
The controller uses precise platinum temperature sensors type
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
PE
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 25.
The sensors are polarity free.
Sensors MUST NOT be connected to the 230/240V~
terminals.
1 2
10.8
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
3 of the solar controller and the sensor element inserted into
the controls pocket at the auxiliary heater level (see Fig. 11).
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 Fig. 28 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
Connection of temperature sensors
2 cross-section, up to 50m
2 . In the case of long connections (collector)
Control of Auxiliary heat input