swimming pool heater tankless electric swimming  pool thermostat SPA water heater 220V smart heat exchanger digital display temperature easy set digital thermostat control self modulating eco energy saving booster to pool heat pump stainless steel liner
Specifications:
Liner material: stainless steel
Voltage: 220V
Power: 11KW/15KW/18KW
Phase: single phase
Connection size: 40 mm (1.57 ")
Machine size: 49 x 10 x 38 cm / L x W x H.
Suitable for: hot tub & swimming pool equipment

Description:
Intelligent temperature control, stable performance, safe and reliable
Automatic constant temperature, can be set according to the required water temperature.
The maximum set temperature is approx. 55 ° C.
Safe and reliable, mechanical pressure switch.
When the pressure is below the set value, the power supply is automatically switched off.
Do not heat sea water or salt water.

The thermostat must work with a water pump with an appropriate capacity.
(If the pump and thermostat do not match, the flow rate is too low, the heating pipe is dry and can easily be damaged.)
5.5KW-15KW heaters must operate with a pump with a water flow of at least 177 ft³ / hour (5m³/hour).
18KW-36KW heaters must operate with a pump with a water flow of at least 353 ft³ / hour (10m³/hour).
40KW-60KW heaters must operate with a pump with a water flow of at least 530 ft³ / hour (15m³/hour).

2KW is suitable for 1CBM/265 gallon

The 11KW thermostat is suitable for a pool with ≤ 5.5 CBM/1453 gallon
The 15KW thermostat is suitable for a pool of ≤ 7.5 CBM/1981 gallon
The 18KW thermostat is suitable for a pool with ≤ 9 CBM/2378 gallon

It is recommended to use the thermostat with a circulating water pump:
Operating procedure: first turn on the water pump and then the thermostat.
Shutdown: First turn off the thermostat, wait a while (10 seconds to 1 minute depending on the performance of the thermostat) and then turn off the pump.
Reliable leak protection devices must be installed and commissioned by the responsible electrician. Monthly maintenance and inspection.
The additional heating effect of the thermostat is better. Direct heating requires the use of a more powerful machine.

Manual reset temperature switch:
Prevent water from burning dry and protect the pool heater from overheating
Automatic shutdown in case of lack of water. The thermostat will not work if the pump does not start. It can effectively prevent water shortage and non-standard operation from damaging the machine.
Temperature limit switch:
It will turn off automatically when the temperature reaches the temperature, and it can automatically start the heating function after the temperature is lowered, which can effectively prevent damage from excessive machine temperature.
Fuse protection:
If the current is too large, the circuit breaker is immediately disconnected and the power supply interrupted.
Power protection switch:
Use the AC contactor as a start switch. Regardless of the type of accident, you can quickly disconnect the power supply and protect the safety of the machine and people.
Smart self-diagnosis function:
The control system continuesly monitors the operating status of all parts of the heater and reacts quickly and displays appropriate notification messages for each event to prevent from damage or malfunctions.

If an error occurs, the pool heater will stop immediately and a message will appear on the control panel so that the user or technician can determine where the error is. The safety of the customer is a top priority

Wiring diagram: Series connected L1,L2and L3.