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7. HYDRO UNIT INSTALLATION MANUAL
Engineering Data Book
8 START UP AND CONFIGURATION
Set the DIP switches and function codes.
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 Description
Switch mode
Default setting
3 External P2 pump operation Continuous operation OFF ON
Interlocked with the
internal pump
synchronized with P1.
SW11 Description
Switch mode
Default setting
1 Internal backup heater operation Operate OFF ON Not operate
2 Hot water cylinder heater operation Operate OFF ON Not operate
3 Booster heater operation Operate OFF ON Not operate
SW12 Description
Switch mode
Default setting
1 Hot water supply operation Valid OFF ON Invalid
2 Zone 1 operation Valid OFF ON Invalid
3 Zone 2 operation Invalid OFF ON Valid
SW13 Description
Switch mode
Default setting
1 Type of motorized 3-way valve
• 2-wire spring return type
• 3-wire SPST type
OFF ON 3-wire SPDT type
2 Interlocking with boiler Invalid OFF ON Valid
3 Auto restart for power failure Auto restart OFF ON Manual restart
4–
SW02 Description Default setting
4 Room thermostat Invalid OFF ON Valid
ON
OFF
SW10 SW11 SW12 SW13
1
2
3
4
ON
1
2
3
4
ON
1
2
3
4
ON
1
2
3
4
ON
▼ Fig. 8-01
31-EN