Baxi Solarflo Installation Manual page 21

Fig. 23
1 collector, 1 storage tank
Collector
P
FM
Tret
1 collector, 2 storage tanks
with 2 pumps
Tcoll
Storage tank1
Collector
FM
Tret
2 collectors, 1 storage tank
with 2 pumps
Collector 1
Tcoll1
P1
System type
Type Description
0 1 collector array, 1 storage cylinder
2 1 collector array, 2 storage cylinder (pump-pump)
4 2 collector array, 1 storage cylinder (pump-pump)
System type
Type Description
0 1 collector array, 1 storage cylinder
2 1 collector array, 2 storage cylinder (pump-pump)
4 2 collector array, 1 storage cylinder (pump-pump)
NOTE:The solar gain flowmeter must be connected to sensor terminals marked WMM (see Fig. 21).
Solarflo - Solar Thermal Domestic Hot Water System
Type 0:
Tcoll
Storage tank
Tth
Tst
Type 2:
Storage tank2
Tth
Tst1 Tst2
P1 P2
Type 4:
Tcoll2
Storage tank1
Tth
Tst
P2
FM
Tret
10.0
10.5
For solar gain (energy productivity) measurement it
is necessary to fit the flowmeter and collector return
sensor as shown in the diagram in Fig. 23.The collector
return sensor must be securely attached to the return
pipework using the securing tiles supplied and then
covered by insulation.The solar gain of the system is
calculated on the basis of the temperature difference
between the collector flow and return and the solar
primary circulation flow rate.
The function must be switched "on" when commissioning
the Solar Differential Temperature Controller. Refer
to the Baxi Solarflo "Commissioning, Maintenance &
Servicing Guide" for further details.
For System Types 2 and 4 the additional pump (P2) can
be ordered as an accessory, Part No. 5129362.
Tcoll Temperature measuring point collector
Tth Temperature measuring point thermostat
Tret Temperature measuring point collector return
Tst Temperature measuring point storage tank
P Pump
FM Flowmeter
Output terminal designation (see Fig. 21)
A1 A2
P1 -
P1 P2
P1 P2
Sensor terminal designation (see Fig. 21)
T1 T2 T3
Tcoll1 Tst1 -
Tcoll1 Tst1 Tst2
Tcoll1 Tst1 Tcoll2
Installation of solar controller
Solar Gain measurement
A3
Cooling or thermostat or diff. controller
Cooling or thermostat or diff. controller
Cooling or thermostat or diff. controller
T4 T5
Tret Tth/TDiff1
Tret Tth/TDiff1
Tret Tth/TDiff1
T6
Tfr TDiff2
Tfr TDiff2
Tfr TDiff2
21