FILE NO : A09-01P Quick reference AIR TO WATER HEAT PUMP
Quick Reference Guide - Page 2 Estia System Domestic Hot Water Space Conditioning Radiator Fan coil unit (Heating or Cooling) Outdoor unit Hydro unit Hot water cylinder Under floor heating (Zone Control) Estia Outdoor Unit HWS-802H-E HWS-1102H-E HWS-1402H-E 8.0kW Inverter (use Hydro Unit: HWS-802XWH**-E) 11.2kW Inverter (use Hydro Unit: HWS-1402XWH**-E) 14.
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.
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.
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.
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.
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 : 5m HWS-1102H-E : 3m HWS-1402H-E : 3m 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.
Quick Reference Guide - Page 8 Outdoor Unit HWS-802H-E HWS-1102H-E, 1402H-E
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 of the Hydro Unit.
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.
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 turns to release air.
Quick Reference Guide - Page 12 Electrical Connections E Box layout Terminal Block Connections
Quick Reference Guide - Page 13 Power Lines Schematic Control Lines Schematic
Quick Reference Guide - Page 14 Electrical supply / cable specifications Wiring specifications (power line) POWER SUPPLY Maximum current Installation Cable size fuse rating 14 kW 230 V ~ 50 Hz 22.8 A 25 A 2.5 mm² or more 11 kW 230 V ~ 50 Hz 22.8 A 25 A 2.5 mm² or more 8 kW 20.8 A 25 A 2.5 mm² or more – Description Outdoor unit power Outdoor-Hydro 230 V ~ 50 Hz – Connection destination L , N 1.5 mm² or more 1 , 2 , 3 3 kW 230 V ~ 50 Hz 13 A 16 A 1.
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.
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.
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.
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.
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. SW10 Switch mode Description Default setting Alternate 1 Internal pump P1 operating mode Continuous operation OFF ON HP synchronized 3 External P2 pump operation Continuous operation OFF ON Interlocked with the internal pump synchronized with P1.
Quick Reference Guide - Page 20 Hydro Unit Remote Control Buttons and Functions 1. TEMP. button: 2. SCHEDULE button: 3. TIME button: 4. SET button: Changes the set temperature for each operation mode (ZONE1/2 hot water) by 1°C step. Sets the current time and scheduled weekly operation. 12. OPERATE MODE button: Determines the entered current time setting and scheduled weekly operation setting. 13. ZONE1, 2 button: Clears settings for the current time and scheduled weekly operation. 7.
Quick Reference Guide - Page 21 Display Explanation 18: ZONE1, ZONE2 Display Description Lights when floor heater or radiator is connected (when the system has floor heater or radiator). 20: HOT WATER Display Description Lights when hot water supply system is connected (when the system has hot water supply). ZONE1 selected for Temperature to be changed. Lights when system configured to have 2 zones. °C ZONE2 selected for Temperature to be changed. HOT WATER selected for Temperature to be changed.
Quick Reference Guide - Page 22 Display Explanation (cont.) 19: TIMER Display 21: OPERATION Description Display Description Clock: Displays the current time (AM or PM). Lights while internal pump (P1) or external pump (P2) is driven. Displays days of the week (Sunday to Saturday). Lights during backup operation only by the heater. Lights when the NIGHT button is pressed and goes out when the button is pressed again.
Quick Reference Guide - Page 23 Main setting items (1) Setting Hot Water Temperature Range (function code 18 to 1F) • Set the temperature range for heating (zone 1, zone 2), cooling, and hot water. • The upper-limit and lower-limit temperatures of each mode can be set. (2) Setting Heat Pump Operation Conditions for Hot Water Supply (function code 20 and 21) • Set the heat pump start water temperature and heat pump stop water temperature.
Quick Reference Guide - Page 24 Main setting item (cont.) (11)Setting 2-Way Valve (for Cooling) Operation (function code 3C) • When using both cooling and heating operations and there is an indoor unit only for heating (such as floor heating), install the 2-way valve and set this function code. (12)Setting 3-Way Valve Operation (function code 54) • This setting is not necessary for normal installation.
Quick Reference Guide - Page 25 Function Code Number Function Code List (cont.
Quick Reference Guide - Page 26 Function Code Number Function Code List (cont.) Function Remote Controller 24 hour or 12 hour remote control display.
Quick Reference Guide - Page 27 Settings by Purpose (cont) Settings for 2-zone temperature control • Procure a motorized mixing valve locally and perform piping. Connect the valve cables (as described in Electrical section). • Procure a buffer tank locally. • Procure a water pump locally, and connect its cables (as described in Electrical section). To inhibit interlocking the water pump with the internal pump of the Hydro Unit, set DIP SW10-3 on the Hydro Unit board to OFF.
Quick Reference Guide - Page 28 Sensor Temperature Monitoring Function The sensor sensing temperature is displayed on the remote controller. This function allows you to make sure whether the sensor is installed properly. 1) Press the TEST + CL buttons for four seconds or more. 2) Select the Code No. with the TEMP. buttons. 3) Press the TEST button to exit the test mode. Code No.
Quick Reference Guide - Page 29 Alarm Indications Alarm indication E03 E04 F03 F10 F11 F14 F17 F18 F23 F29 F20 F30 L07 L09 Alarm description and generation/reset conditions Regular communication error between hydro unit and remote controller (system controller) If there is no regular communication from the remote controller for three minutes, the hydro unit regards it as no remote controller. If there is no communication from both sides, alarm E03 occurs.
Quick Reference Guide - Page 30 Alarm Indications (cont) A09 A11 P31 Overheat preventive operation malfunction Auto-reset: When operation mode is changed Release preventive operation malfunction This alarm occurs when the Hydro Unit enters the forcedstop zone 10 times. Self-hydro unit is stopped due to alarm of other hydro unit. When alarm occurs in an hydro unit in the group, other hydro units must also be stopped with refrigerant control.
Quick Reference Guide - Page 31 Outdoor Fault Diagnosis You can perform fault diagnosis of the outdoor unit with the LED's on the P.C. board of the outdoor unit in addition to check codes displayed on the wired remote controller of the hydro unit. Use the LED’s and check codes for various checks. Check of the current abnormal status 1. Check that DIP switch SW803 is set to all OFF. 2. Jot down the states of LED800 to LED804. (Display mode 1) 3. Press SW800 for at least one second.
