10 Optional functions
Indoor unit
TCGB0123 rev.2 - 10/2019
124
10.1 Indoor unit
10.1.1 Optional functions by DSW setting
Code
Optional function
description
Explanation
DSW1#4:ON
Heating & Cooling (ON)
Unit
In case of cooling operation, this DSW should be set to ON + Cooling
kit accessory.
DSW3#3:ON
1 step heater for 3 phase
unit option
This option can be used to switch all 3 steps of the electric heater at
the same time, by means of a DIP-switch setting, in order to prevent
3-phase imbalance by the electric heater steps.
DSW4#8:ON
87
DHW Defrost
This function allows to perform the defrost operation at the DHW tank
instead of at the indoor water installation.
DSW4#7:ON
87
Heating Heater forced OFF
This function forces a permanent OFF of the heater when selecting an
installation conguration without the electric heater of the unit
DSW4#6:ON
87
Unit and pipes installation
freeze protection
This function allows to start water pump in very low conditions.
DSW4#5:ON
87
Standard / Economic water
pump operation
This function allow to start/stop water pump by two conditions
DSW4#4:ON
87
Emergency Heater
operation manual option
In the event of outdoor unit failure, the required heating can be
provided by an electric heater or by a boiler.
DSW4#3:ON
87
DHW Heater Operation
The electric heater of the domestic hot water tank is disabled by
factory setting. This function allows to activate its operation if needed.
DSW4#2:ON
87
DHW 3 way valve forced
ON
When combination with domestic hot water tank, the activation of this
function changes the position of the 3-way valve to the DHW operation
position, then the unit is forced to work against the heating coil of the
DHW tank. This can be used, for example, for a quick water lling of
the DHW tank’s heating coil.
DSW4#1:ON
87
Remote control box for
YUTAKI M
This function activates the communication between YUTAKI M PCB
and the PCB of the dedicated accessory for mirror function
ATW-YMM-01.
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