Installation Of Solar Controller - Baxi MULTIFIT Evacuated Tube Collector Kit Instructions

Fuse Rating: T 2A L 250V
Fig. 13
PE
L
N
A1
N
A2
N
A3
N
mains 230/240 V area
PE Earthed connection
L Mains supply live conductor
N Mains supply neutral conductor
A1 Switch output to solar pump
N Neutral wire to solar pump
A2 Switch output 2 to second
system pump if used (east/west)
N Neutral wire switch output 2
A3 Switch output 3 to auxiliary
heating control
N Neutral wire switch output 3
For switch functions A2 and A3
see Fig. 15
Fig. 14
Fused Double pole
isolating switch
L
N
E
230V/240V~
Mains supply
© Baxi Heating UK Ltd 2011
T5
T6
low voltage area (SELV)
WMM Flow meter
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.- frost protection or
for 2nd temperature
differential controller
Hydraulic Station
Solar
differential
controller
Solar coil
over-temp
cut-out
9.0
9.1 General connection guidelines.
In the case of all connecting wires the outer sheath should be
stripped back to 80mm. The individual conductor sleeving
WMM
should be stripped approx. 10mm.
T1
Flexible cables are inserted in the controller through
T2
knockouts provided in the controller backplate.
T3
Flexible cables must be secured against straining by suitable
strain relief bushes or devices.
T4
Protect flexible cables from damage by hot pipework.
The controller must be earthed.
9.2 230/240V~ connections
For 230V connections you must follow the following points:
The mains supply to the controller should be via a suitable
fused 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. 14).
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~ 1 Amp
max load outputs. If voltage free contacts are required, this
must be done via a relay (see Figs. 16 or 17 Block Wiring
Scheme C or E) order accessory Code No. 5122765.
NOTE:The Solar Differential Controller's internal 1A switch
outputs are not suitable for Y plan systems.
NOTE: This controller is suitable for S plan and Y plan
systems. However, in the event of an installation having a 'Y'
plan boiler system that is to be controlled by the solar
controller, a relay is required (not supplied). This is available as
a Baxi Spares Item, Code No. 5122765.

Installation of solar controller

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