CTC Union GSi 16, Installation And Maintenance Manual

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31 CTC GSi 16
M
M
MP
MP
B30
G30
Y11
B31
Y31
Y11
G31
B47 B41
Y41
Y11
G46
Y11
B42
01
02
G32
F2
F3
B7
Schematic diagram only The installation engineer fits expansion tank, safety valves, bleeders, etc. and sizes the
system.
System 2
System 2 is a system structure with solar heat connected to an external heat
source tank (EHS-tank) and an extra buffer tank (CTC EcoTank for example).
The system allows for a larger solar collector surface since it carries a greater
volume of water.
Charging conditions
Charging starts when B31 is 7°C warmer than B42.
Buffer tank without coil:
Charging stops when there is a difference of 3°C between B31/B30 or when
the charge temperature is reached.
Buffer tank with coil:
For a tank with a solar coil, the charging stops instead when B31 is 3°C
warmer than B42.
Charging of the EHS tank compares sensor B41 to sensor B47.
The buffer tank (02) may also have a solar coil; this means that the heat
exchanger (F2), pump (G32) or non-return valve (Y11) is not required.