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21
© Baxi Heating UK 2012
9.0
Installation of solar controller
9.5
Solar Gain measurement
1. For solar gain (energy productivity) measurement in System
type ‘0’, it is necessary to fit the collector return sensor as shown
in the diagram in Fig. 25. and input the correct flow value.
2. For System types 2 and 4, the collector return sensor must
be securely attached to the common return pipework using the
securing tiles supplied and then covered by insulation. Use cable
ties (not supplied) to ensure good attachment and accurate
readings.
3. 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.
4. The function is factory set-up as ‘on’ in the Solar Differential
Temperature Controller.
5. For System Type 2 the additional pump (P2) can be ordered
as an accessory, Part No. 7202943 together with appropriate
sensor for cylinder 84515063.
6. For System type 4 use the East/West kit accessory as required
(See Sales Brochure).
NOTE: The solar gain flowmeter must be connected to sensor terminals marked T7 where fitted (see Fig. 23).
Collector
Type 0:
1 collector, 1 storage tank
Storage tank
Collector
Type 2:
1 collector, 2 storage tanks
with 2 pumps
Storage tank1
Storage tank2
Key
Description
Tc1
Temperature Sensor - Collector 1
Tc2
Temperature Sensor - Collector 2
Tth
Temperature Sensor - Thermostat
Ts1
Temperature Sensor - Storage 1
Ts2
Temperature Sensor - Storage 2
Tret
Temperature Sensor - Collector Return
P1
Circulation Pump 1
P2
Circulation Pump 2
FM
Flow Meter
Tfr *
Temperature Sensor - Frost Protection
*
not shown
System
Type
System Description
T1
T2
T3
T4
T5
T6
T7
0
1 collector array, 1 storage cylinder
Tc1
Ts1
-
Tret
Tth
Tfr
FM
2
1 collector array, 2 storage cylinders
Tc1
Ts1
Ts2
Tret
Tth
Tfr
FM
4
2 collector arrays, 1 storage cylinder
Tc1
Ts1
Tc2
Tret
Tth
Tfr
FM
Collector 1
Type 4:
2 collectors, 1 storage tank
with 2 pumps
Storage tank1
System type
Output terminal designation (see Fig. 23)
Type
Description
A1
A2
A3
0
1 collector array, 1 storage cylinder
P1
-
Cooling or thermostat or diff. controller
2
1 collector array, 2 storage cylinder (pump-pump)
P1
P2
Cooling or thermostat or diff. controller
4
2 collector array, 1 storage cylinder (pump-pump)
P1
P2
Cooling or thermostat or diff. controller
Fig. 25
Tc1
Tc1
Tc2
Tc1
Tth
Ts1
Tret
Tret
Tret
P1
P1
P2
P1
P2
Ts2
Ts1
Ts1
Tth
Tth
FM
FM
FM
Tret