Daikin EKRTWA User manual

INSTALLATION MANUAL
EKRTWA
Room thermostat

60 mm/2.36 inch
125 mm/4.92 inch 34 mm/1.34 inch
87 mm/3.43 inch
2
1
3
±1.5 m
1.5 m
±60 inch
60 inch
±1.5 m ±60 inch
>8 inch
>8 inch
>0.2 m
>0.2 m
>8 inch
>0.2 m
>0.2 m
1
2
3

EKRTWA
Room thermostat
4PW56101-1
Installation manual
1
The English text is the original instruction. Other languages are
translations of the original instructions.
Contents
1. Introduction ............................................................................1
2. Installation of the EKRTWA....................................................2
3. Setting up codes in the installer menu ...................................5
4. Technical characteristics ...................................................... 11
1. Introduction
The room thermostat EKRTWA can be used to control the Daikin
system (radiator heating and floor heating/cooling applications).
It is typically connected to the Daikin unit. Refer to the "Typical
application examples" in the Installation manual of the Daikin
unit.
■ In case of floor heating-only applications the room
thermostat can also be connected to the individual motorized
valve of the floor heating loop.
EKRTWA Room thermostat Installation manual
Read this manual attentively before starting up the unit.
Do not throw it away. Keep it in your files for future
reference.
Improper installation or attachment of equipment or
accessories could result in electric shock, short-circuit,
leaks, fire or other damage to the equipment. Be sure
only to use accessories made by Daikin which are
specifically designed for the use with the equipment and
have them installed by a professional.
If unsure of installation procedures or use, always
contact your dealer for advice and information.

Installation manual
2
EKRTWA
Room thermostat
4PW56101-1
■ If a floor heating-only application is used in combination with
fan coil units each fan coil unit should have its dedicated fan
coil thermostat.
2. Installation of the EKRTWA
The EKRTWA thermostat is wall-mounted, with supplied screws
and plugs. Refer to figure 1.
Cabling towards the Daikin system (field supply) should be
foreseen in advance taking the suggestions for an ideal
installation location into account. Refer to figure 2.
1 At the left of the thermostat, gently push the lid.
2 Remove the front cover by pulling it towards you.
3 Unscrew the screw of the cable holder in the bottom left
corner of the back part of the thermostat and remove the
transparent cable protection.
4 Remove the battery insulator.
5 Drill holes in the wall taking the dimensions of the thermostat
into account and insert the supplied plugs in the holes.
Refer to figure 3.
Before obtaining access to terminals, all power
supply circuits must be interrupted.
3
3
2
1
4
3

EKRTWA
Room thermostat
4PW56101-1
Installation manual
3
6 Pass the unit or motorized valve wiring through the back of
the thermostat.
7 According your application, perform the wiring.
7a When connected to the unit, refer to the wiring diagram of
the unit.
For heating-only applications, wire connection to C is not to
be installed.
Use wire size 0.75~1.50 mm
2
/AWG18~16.
All field wiring and components must be installed by
a licensed electrician and must comply with relevant
European and national regulations.
Example unit
H Heating demand
C Cooling demand
HCLN
C Hcom
X1M

Installation manual
4
EKRTWA
Room thermostat
4PW56101-1
7b When connected to the motorized valve, wire the motorized
valve and the thermostat as shown below (for heating-only
applications).
The output relays (H and C) are voltage-free contacts. Refer
to "Technical characteristics" on page 11 for maximum load.
8 Fasten the thermostat with the supplied screws.
9 Put the transparent cable protection back into place and fix
the cable protection with the screw.
10 Close the thermostat cover.
11 Remove the protective film from the LCD.
Be careful not to pinch the wiring when fastening.
H
C
com
X1M
Power supply

EKRTWA
Room thermostat
4PW56101-1
Installation manual
5
3. Setting up codes in the installer menu
You can set up codes, starting from the time and date menu (in
advanced mode).
1 Activate the advanced mode by pressing > during 5
seconds in OFF mode (
D
).
2 Navigate to the date and clock setting menu (
G
) by pressing
> .
3 Press
>
and keep it pressed while now pressing
=
during 10 seconds.
y
is displayed next to
4®
.
4 Press
<
or
>
to consult the current settings of the
codes.
5 To modify codes, press
+
,
-
or
=
.
The value is flashing when being modified.
6 Press
+
or
-
to increase or decrease the code value by
1 step.
To put a code back to its default value, press
+
and
-
at
the same time.
7 Press
=
to save your selection.
You can exit this code menu by going to the "
/
" code and
pressing
=
.
NOTE
As a consequence of a customized configuration, it
is not abnormal that some codes are no longer
accessible.

Installation manual
6
EKRTWA
Room thermostat
4PW56101-1
3.1. Set-up for Fahrenheit degree type
Refer to the operation manual how to change parameter in user
menu.
3.2. Set-up for heating/cooling applications
For heating/cooling applications, set the following codes:
3.3. Set-up for radiator applications
Before operation, change the following temperature control
parameter to the required setting for radiator applications.
1st
code 2nd
code Description Range
1® 01
Degrees type. °C/°F
1st
code 2nd
code Description Required setting
5® 01
Cooling mode present?
ÚêÒ
1st
code 2nd
code Description Required setting
6® 02
Use proportional band control?
?
(=hysteresis)

EKRTWA
Room thermostat
4PW56101-1
Installation manual
7
3.4. Overview of all codes
Following codes can be changed in the installer menu:
1st
code 2nd code Description Default Range Step
Readout codes
4® 01
+
R
Calibration of
internal sensor.
Actual
temperature +
offset are
displayed. The
h
symbol
appears when
the offset
deviates from 0.
Offset = 0 Offset:
–5°C~5°C 0.1°C
Offset:
–9°F~9°F 0.2°F
Installation codes
5® 01
Cooling mode
present?
≈œ ÚêÒ
/
≈œ
—
Temperature control codes
Daikin advizes not to change below temperature control
parameters. They are set for an optimal use of the Daikin
system.
6® 02
Use
proportional
band control?
ÚêÒ ÚêÒ
(proportional
band)
/ ≈œ
(hysteresis)
—
03
Hysteresis
value
00.5 00.5 ~ 02.0
0.1°C
00.9 00.9
~
03.6
0.1°F
04
+
p
Duration
proportional
band (heating).
020 010
~
060
1 min.
05
+
p
Minimum "on"
time (heat
demand).
009 002
~
6® 04
/2 1 min.

Installation manual
8
EKRTWA
Room thermostat
4PW56101-1
6® 06
+
p
Minimum delay
between 2
heating cycles.
005 001
~
6® 04
/2 1 min.
07
+
o
Duration
proportional
band (cooling).
020 010
~
060
1 min.
08
+
o
Minimum "on"
time (cool
demand).
007 002
~
6® 07
/2 1 min.
09
+
o
Minimum delay
between 2
cooling cycles.
003 001
~
6® 07
/2 1 min.
10
Value of
proportional
band.
02.0 01.0 ~ 04.0
0.1°C
03.6 01.8
~
07.2
0.1°F
11
Not used
parameter —— —
12
Upper setpoint
limitation.
37.0 22.0
~
37.0
0.5°C
99.0 72.0
~
99.0
0.5°F
13
Lower setpoint
limitation.
04.0 04.0 ~ 20.0
0.5°C
39.5 39.0
~
68.0
0.5°F
1st
code 2nd code Description Default Range Step