Hitachi YUTAKI S COMBI Serie Manual De Instrucciones página 35

ELECTRICAL AND CONTROL SETTINGS
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DSW1: Additional setting 0
Factory setting. No setting is required.
Factory setting
?
N O T E
In case of installing the "Cooling kit" accessory, set the pin 4 of DSW1 to
ON in order to enable the cooling operation.
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DSW2: Unit capacity setting
No setting is required.
2.0 HP
4.0 HP
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DSW3: Additional setting 1
Setting before shipment
1-step heater for 3-phase unit
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DSW4: Additional setting 2
Setting before shipment
DHW defrost
Heater forced OFF
Unit and installation pipes antifreeze
protection
Standard / ECO water pump operation
Electric heater or boiler emergency mode
DHW tank's heater operation
17 PMML0573 rev.1 - 07/2021
2.5 HP 3.0 HP
5.0 HP 6.0 HP
DHW 3-way valve and expansion valve
forced ON
!
C A U T I O N
• 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.
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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.
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 Two3 (boiler / heater thermistor)
and Two (water outlet thermistor) for water
control
7 8
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DSW6: Not used
Factory setting
7 8
(Do not change)
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DSW7: Additional setting 4
7 8
Factory setting
7 8
Compatibility with ATW-RTU-04
(When cooling mode operation is needed)
7
8
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DSW18: Not used
7 8
Factory setting
(Do not change)
7 8
7 8