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ENGLISH
DHW tank (Continued)
Electrical connections
Connections to be made in the electrical box of DHW tank
1. Connect the booster heater power supply and thermal protection cable.
2. Make sure to ensure strain relief of the cable.
Connections to be made in the electrical box of indoor units
3. Mount the prewired contactor (K3M) and circuit breaker (F2B). The contactor should be fixed with the
two screws supplied.
4. Connect the loose ends of the contactor to terminal 7 and 8 on the terminal block and the connector in
the socket X13A on the PCB.
5. Plug the thermistor cable connector in the socket X9A on the PCB.
6. Connect the booster heater power supply and thermal protection cable (field supply) to terminal 7, 8, 21,
22 and earth on the terminal block.
7. Connect the booster heater power supply cable to the circuit breaker (F2B) and earthing screw.
8. Fix the cables to the cable tie mountings with cable ties to ensure strain relief.
9. Set DIP switch SS2-2 on the PCB to ON.
Procedure
Switch off the power supply before making any connections.
Use a thermal grease in thermistor pocket after installing electric connections.
It is of great importance that the heater is filled with water before the electricity is hooked up, or else- the
warranty is not valid. If the heater is installed and not used, it must be flushed with water once a week.
NH080PHXEAHydro unit_IM_E 32659-1.indd 45
2010-07-28 ｿﾀﾈﾄ 8:59:55
