Daikin EWTP340MBYN [2/8] Addendum installation and operation manual
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Daikin EWTP340MBYN [2/8] Addendum installation and operation manual

Daikin EWTP140MBYN [2/8] Addendum installation and operation manual
Addendum Installation and operation manual
1
Option Heat recovery
4PW27656-1
I
NTRODUCTION
EWTP110~540 = EWAP110~540 + Heat recovery
I
NSTALLATION
Installation of the heat recovery circuit
I
NTRODUCTION
To achieve a stable high pressure management, the units with option
heat recovery installed are equipped with inverter fans.
■
When the unit is running in heat recovery mode:
■
The fans of the air cooled condenser will be controlled as to
achieve a high pressure between 19.0 bar and 22.0 bar.
The high pressure setpoint depends on the difference between
the evaporator water temperature and its set-point of the active
thermostat function (inlet or outlet thermostat).
- If there is a big difference (= high cooling load), the high
pressure will be reduced as to achieve a maximum cooling
capacity.
- If there is a small difference (= low cooling load), the high
pressure will be increased as to maximize the heat
recovery capacity.
Further details and settings can be found in the service manual.
■
It is possible to use a heat recovery pump. Connect the heat
recovery pump to a voltage free contact. (For more details
refer to the installation manual and the wiring diagram.)
■
When the unit is running in cooling mode, the fans of the air
cooled condenser will be controlled as to achieve a high
pressure of 13.0 bar.
S
ELECTING
INSTALLATION
SITE
This is a class A product. In a domestic environment this product may
cause radio interference in which case the user may be required to take
adequate measures.
A
DVANCED
FEATURES
OF
THE
DIGITAL
CONTROLLER
This chapter gives an overview and a brief functional description of
the screens provided by the different menus. Please add this
information to the information mentioned in the operation manual.
Readout menu
Usersettings menu
Info menu
Input/output menu
Option Heat recovery
Addendum
Installation and operation manual
As to avoid too low condensing pressure of the unit
resulting in too low evaporating pressure, the entering
water to the heat recovery condenser must not be below
30°C. For this reason a return water mixing valve as shown
in the figure below must be installed.
1 Heat recovery
condenser
2 Water tank
3 Return water mixing
valve
To consult information about the actual
heat recovery sensor inlet set point and
temperature (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 consult information about the status
of the unit and the running mode (heat
recovery mode = "
 
" or
cooling mode) of the circuit .
To consult information about the
pressures and the high pressure setting
of circuit 1.
To consult information about the
pressures and the high pressure setting
of circuit 2.
(only for EWTP400~540)
To define the heat recovery thermostat
settings (only available if heat recovery
thermostat function of the controller is
selected, refer to the chapter "Defining
the heat recovery mode" on page 2)
and to define the heat recovery
condenser pumplag setting.
To consult additional information about
the unit such as the unit type and the
refrigerant used.
To check whether or not the discharge
thermal protector or the compressor
thermal protector are activated and to
check the status of the fan inverter for
circuit 1.
To check whether or not the discharge
thermal protector or the compressor
thermal protector are activated and to
check the status of the fan inverter for
circuit 2.
(only for EWTP400~540)
To check the status of the changeable
digital inputs and the heat recovery
mode switch (only available if the heat
recovery mode switch is selected, refer
to the chapter "Defining the heat
recovery mode" on page 2).
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