Installation manual

INSTALLATION SECTION 3
A PT1000 temperature sensor is used to determine whether there is enough solar energy
from the collectors. This sensor measures the temperature of the collector absorber or, in the
case of evacuated tube collectors, the water leaving the collector array, to check there is
sufficient heat gain.
The two different collectors (glazed flat plate or evacuated tubes) require different sensor type
and location.
S
ee Fig 3 for collector layout.
Glazed Flat Plate Collectors:
With this type of collector the sensor is actually located in the collector (not in the liquid).
The sensor is simply placed in a pocket which is connected to the rear of the collector
absorber to measure the temperature.
The temperature sensor is placed on the flow line exiting the collector array.
Location for Series/Parallel (single field) Layout, Fig 3.
As mentioned in the description a single field collector array can be arranged in parallel to
reduce the pressure drop and limit expansion within the collector header. Fields are designed
to optimise system performance. Please refer to basic operation for details or contact
Andrews Water Heaters.
The operation of the system will determine the sensor location.
IN SERIES – the sensors are placed in the final collector
IN PARALLEL – the sensor should be placed in the collector closest to the return.
SENSORS IN
PANELS
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