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Fig. 23
240 Volts
PE
PE
A2
A1
A3
L
PE
PE
N
N
N
N
Mains 230/240V connections
Terminal
Reference
L
240V Supply Live
N
240V Supply Neutral
A1
Switched Output to Solar Pump
N
Solar Pump Neutral
A2
Switched Output - Live 2 (For East West Array or Dual Tanks)
N
Switched Output 2 Neutral
A3
Switched Output - Live 3 (For Auxiliary Heat Control)
N
Switched Output 3 Neutral
PE
Earth Connection
T1 & M1
Temperature Sensor Collector 1 (Tc1)
T2 & M2
Temperature Sensor Storage Tank 1 (Ts1)
T3 & M3
Temperature Sensor Collector 2/Storage Tank 2 (Tc2 / Ts2)
T4 & M4
Temperature Sensor Collector Return (Tret)
T5 & M5
Temperature Sensor for 2nd temperature differential controller (Tth)
T6 & M6
Frost Protection or 2nd temperature differential controller
T7 & M7
Flow Meter (Optional)
Fig. 24
Double pole
isolating switch
L
N
E
230V/240V~
Mains supply
20
© Baxi Heating UK 2012
Fuse rating T 2A L 250V
F U S E
T1
T2
T3
T4
M1 M2 M3
Low Voltage (SELV) connections
Description
Hydraulic Station
Solar
differential
controller
Solar coil
over-temp
cut-out
9.0
9.3
Electrical connection overview
1. Always disconnect from the mains before opening the
controller cover. The electrical installation must conform to all
current Wiring Regulations and be carried out by a competent
electrician.
T5
T6
T7
2. The connection of all electrical cables is to the terminal block
located on the backplate of the controller. The
terminals on the right side of the terminal block are for extra
low voltage connections (temperature sensors and flow
M4
M5 M6 M7
transmitters). The terminals on the left side of the
terminal block are for 230/240 V~ connections.
General connection guidelines.
3. In the case of all connecting wires the outer sheath should
be stripped back to 80mm. The individual conductor sleeving
should be stripped approx. 10mm.
4. Cables are inserted in the controller through knockouts
provided in the controller backplate.
5. Flexible cables must be secured against straining by
suitable strain relief bushes or devices.
6. The controller must be earthed.
9.4
230/240V~ connections
1. For 230V connections you must follow the following points:
2. The mains supply to the controller should be via a suitable
double pole isolating switch with a contact separation of at
least 3mm in both poles. Additionally the controller should be
wired via the solar coil over temperature cutout such that
power is interrupted to the controller and hydraulic station in
the event of the cylinder overheating (see Fig. 24).
3. Controllers are intended for the operation in 230/240V~
/50Hz mains. Any motorised valves connected must be suitable
for this voltage.
4. All earth wires must be connected to terminals marked with
PE. Any bare wire earth conductors must be sleeved with
green/yellow sleeving.
5. The neutral terminals (N) are electrically connected and are
not switched.
6. All switch outputs (A1, A2 and A3) are 230/240V~ closers. If
potential-free contacts are needed, appropriate accessories are
required.
Installation of solar controller
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