Daikin EWTP340MBYN [3/8] Efining
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Daikin EWTP340MBYN [3/8] Efining

Daikin EWTP340MBYN [3/8] Efining
Option Heat recovery
4PW27656-1
Addendum Installation and operation manual
2
S
OFTWARE
STRUCTURES
The software structures mentioned in the operation manual, must be
replaced by the software structures shown in this manual:
■
For the EWTP110~340, see page 4
■
For the EWTP400~540, see page 5
D
EFINING
THE
HEAT
RECOVERY
MODE
The decision whether the unit works in heat recovery mode or not
can be done in 2 ways:
1.
Through a heat recovery mode switch (S6S field installed).
- When the heat recovery mode switch is closed, heat
recovery is asked.
- When open, cooling mode is asked.
2.
Through the heat recovery thermostat function of the controller.
The heat recovery mode is controlled by the hot water
temperature measured by an additionally installed sensor R8T
(EKCLWS) in the hot water.
To achieve this setting a changeable analog input must be
defined as "
   
" (refer to "Customization in the
service menu", chapter "setting of the changeable inputs and
outputs" in the operation manual delivered with the unit).
To check the status of the fan on/off and
the setpoint requested to the fan
inverter of circuit 1.
To check the status of the fan on/off and
the setpoint requested to the fan
inverter of circuit 2.
(only for EWTP400~540)
To check the status of the alarm, the
pump, and the value of additional heat
recovery sensor (only available if the
heat recovery thermostat function of the
controller is selected, refer to the
chapter "Defining the heat recovery
mode" on page 2).
To check the status of the evaporator
heater tape and of the heat recovery
pump.
 % 
 ,
 $ -
 % 
 ,
 $ -
 % 
( '&
',( &
   
.( ,
& 
& $ 
&  & ' 
NOTE
It is clear that the cooling capacity and the cooling
efficiency will be higher when the unit is running in
cooling mode. For this reason, we advise to use a
external thermostat for S6S that switches the unit
automatically to the cooling mode when the target
temperature of the hot water is reached.
The changeable digital input 1 is by default defined as
"
 $%
".
NOTE
■
If the heat recovery thermostat function of the
controller will be used and the heat recovery
mode switch will not be installed, then the
changeable digital input 1, default defined as
"
 $%
", must be changed to "

".
(refer to "Customization in the service menu",
chapter "setting of the changeable inputs and
outputs" in the operation manual delivered with
the unit).
■
If the heat recovery thermostat function of the
controller will be used and the heat recovery
mode switch will be installed, then the unit will
only run in heat recovery when the heat recovery
thermostat function requests heat recovery and
when the heat recovery mode switch is closed
(AND function). Else the unit will run in cooling
mode.
An additional sensor R8T (EKCLWS) must be
connected directly to the PCB of the unit.
NOTE
The units with heat recovery installed can also be used
in a DICN setup.
■
If the system is controlled on inlet water
temperature, the 2 ways to define the heat
recovery mode are available on the master unit.
■
If the system is controlled on outlet water
temperature, the heat recovery mode can only be
controlled by the heat recovery mode switch on
the master unit.
■
On the slave units, the 2 ways to define the heat
recovery mode are available.

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