Baxi Solarflo Installation Manual page 20

Fig. 21
PE
L
N
A1
N
A2
N
A3
N
mains voltage area
PE Earthed wire
L Mains supply live conductor
N Mains supply neutral conductor
A1 Switch output to solar pump
N Neutral wire to solar pump
A2 Live switch output 2
N Neutral wire switch output 2
A3 Live switch output 3
N Neutral wire switch output 3
For switch functions A2 and A3
see Fig. 23
Fig. 22
Double pole
isolating switch
L
N
E
230V/240V~
Mains supply
20 Solarflo - Solar Thermal Domestic Hot Water System
T4
T5
T6
low voltage area
WMM Flow transmitter
T1 Temp.- sensor collector 1
T2 Temp.- storage tank 1
T3 Temp.- sensor collector 2/
storage tank 2
T4 Temp.- sensor collector
return
T5 Temp.- sensor thermostat
or for 2nd temperature
differential controller
T6 Temp.- sensor antifreeze
or for 2nd temperature
differential controller
Hydraulic Station
Solar
differential
controller
Solar coil
over-temp
cut-out
10.0
General connection guidelines.
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.
WMM
Cables are inserted in the controller through knockouts
T1
provided in the controller backplate.
T2
Flexible cables must be secured against straining by
suitable strain relief bushes or devices.
T3
The controller must be earthed.
10.4
For 230V connections you must follow the following
points:
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 for
unvented solar cylinders 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 unvented cylinder overheating
(see Fig. 22).
Controllers are intended for the operation in 230/240V~
/50Hz mains. Any motorised valves connected must be
suitable for this voltage.
All earth wires must be connected to terminals marked
with PE. Any bare wire earth conductors must be
sleeved with green/yellow sleeving.
The neutral terminals (N) are electrically connected and
are not switched.
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
230/240V ~ connections