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[2] Wiring for Configuring Secondary Side Control System To configure a secondary side control system, you need to connect the wiring of the following three devices from the secondary side water circuit to the primary side unit. 1 Flow sensor 2 Secondary side thermistor 3 Pump + flow rate adjustment device (three-way valve, two-way valve, or inverter) Wiring of secondary side circuit Perform the installation work of steps (1) to (4) below. (1) Open the panel. Use a screwdriver to remove the service panel, terminal block box cover, and control box cover (only for system using flow rate adjustment valve (two-way valve or three-way valve)). Service panel (2) Thread the wiring through into the unit Terminal block box cover Control box cover * Remove it only for a system using a flow rate adjustment valve. 1 Thread the flow sensor wiring through A in the figure. 2 Hold the wiring with the cable strap inside the unit indicated as B in the figure to keep it out of contact with the pipes and other components. 3 Thread the wiring through the rubber bush indicated as C in the figure (second one from the left). * For details on the opening procedure of A and the wiring of B, refer to pages 54 and 55. C B C A (3) Wiring connections 1 Connect the flow sensor and flow rate adjustment device Terminal block box Flow sensor Black 15 14 13 White Red Terminal block Wiring Flow rate adjustment device 0-10 V +10 V GND * For details on the wiring procedure of the separately sold thermistor, refer to the separately sold kit Q-1SCK. * For a system that outputs the pump on/off signal from the unit (system that uses a flow rate adjustment valve), connect the wires to 1-3 of CN512. (4) Close the panel. Using a screwdriver, re-place the SERVICE PANEL and the CONTROL BOX (SUB) cover. 53 Connect the flow sensor wiring to the terminal block inside the BOX. The numbers on the wirings correspond to the numbers on the terminal block. Connect each wiring to the correct terminal. When done, hold the excess wiring with the supplied cable tie (long). Also, hold the wirings in place with a cable tie (long) where indicated as B in the figure to keep them out of contact with the pipes and other components. * The 10-V power supply to be connected to No. 10 on the terminal block is not supplied. Furthermore, make sure that the output of the 10-V power supply is within 10 V ±0.5 V.PDF Image | QAHV-N560YA-HPB
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