Sakura SXAO-110HAS, Installation And Service Manual

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Indoor unit- all models (Internal)
1. Air purge valve
Remaining air in the water circuit will be
automatically removed via the air purge valve.
2. Backup heater vessel
The backup heater heats the water in the
backup heater vessel.
3. Backup heater
The backup heater consists of an electrical
heating element that will provide additional
heating capacity to the water circuit if the
heating capacity of the outdoor unit is
insufficient due to low outdoor temperatures.
4. Pump
The pump circulates the water in the water
circuit.
5. Manometer (water pressure)
The manometer allows readout of the water
pressure in the water circuit.
6. Flow switch
The flow switch checks the flow in the water circuit and protects the heat exchanger against
freezing and the pump against damage.
7. Manometer (refrigerant pressure)
The manometer allows readout of the refrigerant pressure in the refrigerant circuit.
8. Motorized 3-way valve
The motorized 3-way valve is used to change the water circuit between space heating/cooling and
hot water supply.
9. User interface
The user interface allows the installer and user to set up, use and maintain the unit.
10. Switch box