Installation guide

Solarflo - Solar Thermal Domestic Hot Water System22
10.0 Installation of solar controller
10.6 Connection of temperature sensors
The controller uses precise platinum temperature
sensors type PT1000.The controller is supplied with
3 sensors. The sensor with black silicone sheathing
must be used for the solar panel sensor.
Installation / cabling of temperature sensors:
Mount the sensors in the pockets provided in the
collector and storage tank. When installing into the
collector panel sensor pocket the sensor should be
secured by inserting through the rubber gland provided.
The wires of the temperature sensors can be lengthened.
Up to 15m long you need a 2 x 0,5mm
2
cross-section, up
to 50m 2 x 0,75mm
2
. In the case of long connections
(collector) shielded extension lead must be used.
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 21.
The sensors are polarity free.
Sensors MUST NOT be connected to the 230/240V~
terminals.
10.7 Control of Auxiliary heat input
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
terminals T5 of the solar controller and the sensor
element be inserted into the controls pocket at the
auxiliary heater level.
N.B.The maximum switching current of the controller
is 2A so if switching an electrical immersion heater this
MUST be done via a relay (see Fig. 24 Black Wiring
Scheme C) 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.
3A Fused Supply
L
1
1
710 3
123E
2345678910Terminal Box (Not supplied)
23 4235 12376
NE PLLNESLLNE
DHW ON CH ON
Boiler Terminal Strip Programmer
1
Cylinder Auxiliary Controls
692
12N
Room Stat
1L
Solar
Controller
Boiler Immersion
3
12E
Solar O/Temp Cutout
322
PE L N
Solar Differential Controller
11
A1
12
N T1 T2 T4 WMM
423
LNE
CH Pump
A1 N PE
11 12 E
Solar Pump
3 2 10 1
G/Y BL BR GR
DHW 2 Port Valve
5
OR
3291
G/Y BL BR GR
CH 2 Port Valve
5
OR
See Fig. 20
3A Fused Supply
L
1
1
710 3
123E
2345678910Terminal Box (Not supplied)
23 4235 1216
NE PLNESL LN12
Boiler Terminal Strip Programmable Room Stat
1
L
Cylinder Auxiliary Controls
13
12E
Solar O/Temp Cutout
8
382
PE L N
Solar Differential Controller
11
A1
12 7 2
N A3 N T1 T2 T4 T5 WMM
423
LNE
CH Pump
A1 N PE
11 12 E
Solar Pump
3 2 10 1
G/Y BL BR GR
DHW 2 Port Valve
5
OR
3261
G/Y BL BR GR
CH 2 Port Valve
5
OR
See Fig. 20
3 Amp Fused Supply
L
1
12345678910Terminal Box (Not supplied)
23
NE
13 Amp Fused Supply
L
456
NE
183
12E
Solar O/Temp Cutout
756
LNE
Immersion Heater
A3 N 4
1 5 CoM
Auxiliary Immersion Heater Relay
7
No
382
PE L N
Solar Differential Controller
11
A1
12
N A3 N T1 T2 T4 T5 WMM
A1 N PE
11 12 E
Solar Pump
See Fig. 20Relay
Fig. 24
Block Wiring Schemes
A. Solarflo in conjunction with auxiliary heating by boiler - no reheat control
by solar controller.
B. Solarflo in conjunction with auxiliary heating by boiler - reheat control
via solar controller.
Note: For Boilers without Pump over run CH Pump Live Supply to 5
C. Solar Cylinder with auxiliary heating by immersion heater.