Hitachi YUTAKI S Series Technical Catalogue page 132

10 Optional functions
Indoor unit
10.1 Indoor unit
10.1.1 Optional functions by DSW setting
Code
DSW1#4:ON
DSW3#3:ON
DSW4#8:ON
7 8
DSW4#7:ON
7 8
DSW4#6:ON
7 8
DSW4#5:ON
7 8
DSW4#4:ON
7 8
DSW4#3:ON
7 8
DSW4#2:ON
7 8
DSW4#1:ON
7 8
124 TCGB0123 rev.2 - 10/2019
Optional function
description
Heating & Cooling (ON) In case of cooling operation, this DSW should be set to ON + Cooling
Unit kit accessory.
This option can be used to switch all 3 steps of the electric heater at
1 step heater for 3 phase
the same time, by means of a DIP-switch setting, in order to prevent
unit option
3-phase imbalance by the electric heater steps.
This function allows to perform the defrost operation at the DHW tank
DHW Defrost
instead of at the indoor water installation.
This function forces a permanent OFF of the heater when selecting an
Heating Heater forced OFF
installation configuration without the electric heater of the unit
Unit and pipes installation
This function allows to start water pump in very low conditions.
freeze protection
Standard / Economic water
This function allow to start/stop water pump by two conditions
pump operation
Emergency Heater In the event of outdoor unit failure, the required heating can be
operation manual option provided by an electric heater or by a boiler.
The electric heater of the domestic hot water tank is disabled by
DHW Heater Operation
factory setting. This function allows to activate its operation if needed.
When combination with domestic hot water tank, the activation of this
function changes the position of the 3-way valve to the DHW operation
DHW 3 way valve forced
position, then the unit is forced to work against the heating coil of the
ON
DHW tank. This can be used, for example, for a quick water filling of
the DHW tank's heating coil.
This function activates the communication between YUTAKI M PCB
Remote control box for
and the PCB of the dedicated accessory for mirror function
YUTAKI M
ATW-YMM-01.
Explanation