Hitachi YUTAKI S Series Installation And Operation Manual page 45

DSW4
Unit and installation pipes antifreeze protection
Standard / ECO water pump operation
Electric heater or boiler emergency mode
DHW tank's heater operation
DHW 3‑way valve forced ON
!
CAUTION
• Never turn all DSW4 dip switch pins ON. If this happens, the software of the unit will be removed.
• Never activate "Heater Forced OFF" and "Electric heater or boiler emergency mode" at the same
time.
DSW5: Additional setting 3
◆
In the cases where the outdoor unit is installed into a location where its own outdoor ambient
temperature sensor can not give a suitable temperature measurement to the system, it is available
the 2nd outdoor ambient temperature sensor as accessory. By means of DSW1&2 setting, the
preferable sensor for each circuit can be selected.
DSW5
Factory setting
Outdoor unit sensor for circuits 1 and 2
Outdoor unit sensor for circuit 1; Auxiliary sensor for circuit 2
Auxiliary sensor for circuit 1; Outdoor unit sensor for circuit 2
Auxiliary sensor instead of outdoor unit sensor for both circuits
Use the maximum temperature value between T
(water outlet thermistor) for water control
PMEN0643 rev.0 - 04/2023
(boiler / heater thermistor) and T
wo3
7
7 8
7
7
7 8
wo
8
8
8
6
36