Drayton SHR 521 20 Manuel d'installation et d'utilisation - Page 6
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SHR 521 20
1.2.1
Allocation of terminals for system 1
Arr 1
S1
R1
S4 / TRF
1.2.2 Allocation of terminals for system 2
Arr 2
S1
R1
S4 / TRF
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Standard solar system with 1 store, 1 pump and 3 sen-
sors. The sensor S4 / TRF can optionally be used for heat
quantity balancing.
S3
S2
Solar system and dual-mode DHW cylinder with 1
store, 3 sensors and backup-heating.The sensor S4 / TRF can
optionally be used for heat quantity balancing.
S3
R2
S2
Symbol
Specification
S1
Collector sensor
S2
Store sensor lower
S3
Store sensor upper
(optional)
S4 / TRF
Sensor for heat quantity
measurement (optional)
R1
Solar pump
Symbol
Specification
S1
collector sensor
S2
store sensor lower
S3
store sensor upper
S4 / TRF
sensor for heat quantity
balancing (optional)
R1
solar pump
R2
pump for heat exchange