Instrcution SR201 for Un-pressurized Integrated Solar Hot Water Heater
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6-
Power input L, N: 10A, for power connection, L: live wire, N: zero wire, protective
ground wire, please connect it to ground reliably.
FU
: the fuse of controller, AC250V/2A
Output ports
HR: Electromagnetic relays, designed for on/off control of back-up heating device, Max.
Current: 10A
R2: designed for electromagnetic relay use for the electric tracing belt
（
or Booster pump
or hot water circulation pump
）
, maximum current is 2A.
R1:designed for the solenoid valve of water filling, output power is DC12V, wire
connection is not positive and negative difference.
With Auxiliary electrical heating, the user must install the leakage protector
himself.
Input ports
Sensor of water temperature and water level of the water tank(B03):
Port 1: connect red wire (+12V)
Port 2: connect white wire (COM)
Port 3: connect black wire (GND)
2.4Installation of solenoid valve
Flushing pipe and cleaning pipe before mounting the solenoid valve
If water is provided by water tower, to avoid no water filling or water flow rate is too
low at solenoid valve, please select the solenoid valve which pressure is matched
to the hydraulic pressure got from water tower.