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English
Field Setting Mode
NOTE
࡙ Disinfection function is available only when a booster heater is connected.
࡙ Check tank capacity, booster heater capacity, and booster heater for issues if disinfection operation does
not work normally over the maximum operation time(E919 error).
Forced DHW by User’s Input
࡙ Forced mode can be activated by changing setting value from the setting (#3011, ”0” (No)).
࡙ Forced mode shall be working depending on Timer setting (#3051, #3052).
Additional Solar panel/DHW thermostat Installation for DHW with Heat Pump (Field Option)
࡙ Solar panel and heat pump are able to operate simultaneously by setting value. (FSV #3061, “1”)
࡙ When using DHW thermostat, set the FSV #3061, “2”.
࡙ Zone #1 and #2 valve always keep open except DHW mode in “ON” when the power is “ON” unless
changing the FSV #3071. Default: Room direction valves are open and DHW valve is closed.
࡙ Zone #1 and #2 can be open separately or simultaneously but all three zone valves can not be open or
closed at the same time.
࡙ There is one minute delay of 2-way / 3-Way valve closing whereas no delay of valve opening.
࡙ Individual zone control is only available with external thermostat.
࡙ FSV 3071 determines a 3-way direction.
Energy metering
࡙ To accurately indicate energy consumption, the capacity of the backup heater and booster heater must
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