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FILE NO : A09-01P
Quick reference
AIR TO WATER HEAT PUMP
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Quick Reference Guide - Page 2 Estia System Domestic Hot Water Space Conditioning Radiator Fan coil unit (Heating or Cooling) Outdoor unit Under floor heating Hot water Hydro unit (Zone Control) cylinder Estia Outdoor Unit HWS-802H-E 8.0kW Inverter (use Hydro Unit: HWS-802XWH**-E) HWS-1102H-E 11.2kW Inverter (use Hydro Unit: HWS-1402XWH**-E) HWS-1402H-E 14.0kW Inverter (use Hydro Unit: HWS-1402XWH**-E) Estia Hydro U
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Quick Reference Guide - Page 3 Notes on System Design • The input water temperature to the Hydro Unit must be 55°C or less. Especially, be careful when there is an external heating source such as a boiler. When hot water over 55°C returns, it may result in a failure of the unit or water leakage. • The flow rate of the circulating water must meet the following range:- 11 and 14 kW 17.5 L/minute or more 8 kW 13 L/minute or more If the flow rate becomes less than the minimum, the pr
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Quick Reference Guide - Page 4 Installation Examples Space Cooling and Space Heating with Domestic Hot Water When both cooling and heating are used, install a 2-way valve (for cooling) to the pipe to the room for heating only.
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Quick Reference Guide - Page 5 Installation Examples (cont.) 2-Zone Space Heating with Domestic Hot Water The following shows an example of the 2-zone temperature control. A buffer tank and a water pump are required for the 2-zone temperature control. This example is Heating only, if the Fan Coils are to be used for Cooling then a 2-Way valve must be fitted.
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Quick Reference Guide - Page 6 Hydro Unit – Exploded View 1 : Expansion vessel 2 : Hi pressure switch (4.15 MPa) 3 : Temperature sensor (for Heat pump outlet -TWO) 4 : Pressure sensor 5 : Heat exchanger 6 : Flow switch (13.0 L/min 17.5 L/min) 7 : Temperature sensor (for refrigerant -TC) 8 : Temperature sensor (for water inlet -TWI) 9 : Drain nipple 10 : Water inlet connection 11 : Refrigerant liquid connection 12 : Air relief valve 13 : Pressure relief valve (0.3 MPa (3 bar
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Quick Reference Guide - Page 7 Refrigerant Piping Refrigerant Pipe Lengths and Height The length and height of the refrigeration pipe must be within the following values. Minimum Pipe Length HWS-802H-E : 5 m HWS-1102H-E : 3 m HWS-1402H-E : 3 m Maximum Pipe Length and Height H: Max. ±30 m (above or below) L: Max. 30 m Note The maximum pipe length cannot be increased using additional refrigerant. Refrigeration and Water Cycle Diagrams Hydro Unit Pressure reli
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Quick Reference Guide - Page 8 Outdoor Unit HWS-802H-E HWS-1102H-E, 1402H-E
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Quick Reference Guide - Page 9 Water Piping • Install water pipes according to the regulations of respective countries. • Install water pipes in a freeze-free place. • Make sure that water pipes have sufficient pressure resistance (The setting value of the pressure relief valve is 0.3 MPa). • Do not use zinc plated water pipes. When steel pipes are used, insulate both ends of the pipes. Water Connections • Install a strainer with 30 to 40 meshes (procure locally) at the water inlet
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Quick Reference Guide - Page 10 Checking water volume and initial pressure of expansion vessel The expansion vessel of the Hydro Unit has a capacity of 12 litres. The initial pressure of the expansion vessel is 0.1 MPa (1 bar). The suggested initial water charge is 0.2MPa (2 bar). The pressure of the safety valve is 0.3 MPa (3 bar). Verify whether the capacity of the expansion vessel is sufficient using the following expression. If the volume is insufficient, install an appropriate exte
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Quick Reference Guide - Page 11 Pump operation / configuration Change Pump speed, so that water flow is always greater than the minimum flow rate. If water flow is lower than the minimum rate during operation, the unit detects error. Water charging Charge water until the pressure gauge shows 0.2 MPa (2 bar). Hydraulic pressure may drop when the trial run begins. In that case, add water. Air may enter if the charged hydraulic pressure is low. Loosen the purge valve cap by two turn
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Quick Reference Guide - Page 12 Electrical Connections E Box layout Terminal Block Connections
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Quick Reference Guide - Page 13 Power Lines Schematic Control Lines Schematic
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Quick Reference Guide - Page 14 Electrical supply / cable specifications Wiring specifications (power line) POWER Maximum Installation Connection Description Cable size SUPPLY current fuse rating destination 14 kW 230 V ~ 50 Hz 22.8 A 25 A 2.5 mm² or more L N Outdoor unit power , 11 kW 230 V ~ 50 Hz 22.8 A 25 A 2.5 mm² or more 8 kW 230 V ~ 50 Hz 20.8 A 25 A 2.5 mm² or more 1 2 3 Outdoor-Hydro – – 1.5 mm² or more , , L N 3 kW 230 V ~ 50 Hz 13 A 16 A 1.5 mm² or more , (TB02)
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Quick Reference Guide - Page 15 Input line specifications Description Input Maximum length Emergency stop control Non-voltage 12 m Cylinder thermostat input Non-voltage 12 m Cooling thermostat input Non-voltage 12 m Heating thermostat input Non-voltage 12 m CAUTION Earthing arrangements The Hydro Unit and related equipment must be earthed in accordance with your local and national electrical regulations. It is essential that the equipment is earthed to prevent the e
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Quick Reference Guide - Page 16 Electrical connection for external booster heater CAUTION The maximum current available from the booster heater output is 1 A. Do not connect the booster heater directly to Terminal Block 05 on the Hydro Unit. The AC230 V 1 A output from the Hydro Unit must only be used to energize an external contactor (Supplied locally). • The booster heater can be installed only for room heating and cannot be used for hot water supply. • Install the booster heate
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Quick Reference Guide - Page 17 2-way valve (for cooling) connection Required Valve Specification: Electrical Specification: 230 V; 50 Hz; <100 mA Return Mechanism: 2-wire spring return. • The Hydro Unit has the facility to connect a 2-way valve to isolate Space Conditioning Units that do not perform cooling, when Cooling Mode is selected. • Connect the 2-way valve in accordance with the diagram (opposite):- 3-way valve (diverter) connection Required Valve Specification: Electri
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Quick Reference Guide - Page 18 3-way mixing valve connection Required Actuator Specification Electrical Specification:230 V; 50 Hz; <100 mA The 3-way mixing valve is used to achieve the temperature differential needed in a 2-zone heating system. • Connect the 3-way mixing valve in accordance with the diagrams below:- Hot water cylinder connection (optional) • Please refer to “Electrical supply/cable specifications” for fuse/cable size and for connection details. Electrical Con
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Quick Reference Guide - Page 19 Setting DIP Switches on the Board in the Hydro Unit • Detach the front cover and the electric parts box cover of the Hydro Unit. • Set the DIP switches on the main board. Switch mode SW10 Description Default setting Alternate Internal pump P1 operating 1 Continuous operation OFF ON HP synchronized mode Interlocked with the 3 External P2 pump operation Continuous operation OFF ON internal pump synchronized with P
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Quick Reference Guide - Page 20 Hydro Unit Remote Control Buttons and Functions 1. TEMP. button: 10. NIGHT button: Changes the set temperature for Controls the night set back each operation mode (ZONE1/2 hot operation. water) by 1°C step. 2. SCHEDULE 11. AUTO TEMP. Switches setting temperature button: button: automatically according to outside Sets the current time and temperature. (Pressing this button scheduled weekly operation. long changes the mode to data sett
