Orcon WTU-EC-E User manual

Installation and user manual
WTU-EC-E / IE / TA
Heat recovery unit with EC motors,
Regin controller and external display

2

3
Table of contents
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7
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9
10
13
16
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17
17
18
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20
20
21
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22
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30
31
1. Warnings
2. Commissioning and checklist
3. Technical specifications (WTU-EC-E/IE series)
4. Unit dimensions (WTU-EC-E/IE series)
5. Technical specifications (WTU-EC-TA series)
6. Unit dimensions (WTU-EC-TA series)
7. Installation
8. Connecting accessories
9. Display
- Installation of the operating display
- Explanation Control display
- Running through menus
- Start settings
- Changing access rights
- Changing operating mode
- Activate MTV-3 switch
- Changing fan speeds
- Activate bypass
- Activate CO2 sensor
- Activate CBA reheateror Hot/Cold water coil
- Activate summer night ventilation
- DX Battery Activation
10. Programming the controller via the laptop
11. Failures
12. Maintenance
13. EC Declaration
34
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4

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WARNINGS
• Only authorised technicians are allowed to disassemble and repair this
product.
• Improper handling may result in fire, electric shock or injury.
• Do not install this product in a refrigerated warehouse, swimming pool or
other location where temperature and humidity are significantly different
from normal indoor air. Disregarding this warning may cause the unit to
malfunction.
• Do not install this product where it will be directly exposed to rain.
• Do not install this product in an area where acid, alkaline vapour or vapours
of organic solvents, paint or other toxic gas are present, gas containing
corrosive components or high concentrations of oily smoke are present.
Disregarding this warning may lead not only to malfunction but also to fire or
loss of power.
• Install the WTU in an environment where the temperature is between -10
and +40 degrees Celsius and the relative humidity is less than 60%.
• If condensation occurs, preheat the fresh air with a CBRF duct heater. Always
use a pre-heater with the WTU-EC-TA series to prevent freezing in the heat
exchanger in winter.
• Choose a suitable, solid place to install the product and do so carefully
and safely.
•The external ducts must be installed with a slope to the outside and correctly
insulated. (Rainwater can cause short circuits or other damage).
• Gloves must be worn during installation. Ignoring this warning may lead to
injury.
• Attach the product securely to the earth contact.
• When not using an earthed power cord, an isolating switch with a minimum
gap of 3 mm between contacts must be used to safely disconnect the power
supply.
Note: A system which is not installed in accordance with the installation and operating
instructions is not covered by the guarantee.

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2. Commissioning and checklist
Commissioning by Orcon
Orcon is happy to assist you in commissioning the WTU. After the installation has been
approved by Orcon, you will receive an additional one-year warranty. Prior to
commissioning and in the event of a malfunction, you should check the following points.
Check the installation for the following points:
•The WTU and all external equipment have been installed in
accordance with the installation instructions (see pages 10 to 12).
•The cables of the WTU are correctly connected (see pages13to 15).
•The WTU is powered and earthed.
•The power cables have the correct diameter.
•An isolating switch is fitted.
•The outside air and exhaust air ducts are insulated.
•The silencers are installed and the duct system is correctly
connected to the WTU.
•The diameter of the air ducts must be equal to or larger than the
connection flanges of the WTU.
•The air filters are clean and the air flow is not blocked.
•The outside air intake is located at a sufficient distance from
contaminated air (kitchen exhaust, boiler and fireplaces, etc.).
•There is enough space to carry out servicing. Check that the heat
exchanger, filters and motors (via the side and bottom hatches) are
accessible and can be replaced if necessary.
Only for the TA series:
•A condensate drain is connected to the unit and that it is not
blocked. Make sure that the reinforced hose is placed at an
angle.
•A CBRF preheater is installed.
Check whether the following data are available (or possibly set):
•A weekly schedule with the set normal and reduced fan
speeds.
•Any desired configurations, such as temperature control
functions, fan control, external control functions, etc., can be

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carried out.

7
3.Technical specifications (WTU-EC-E / IE series)
The table below shows the specifications according to EU Regulation 1253/2014.
1] Measured at balanced volumetric flow according to EN 308
WTU
250-EC-
E/IE
WTU
600-EC-
E/IE
WTU
800-EC-
E/IE
WTU
1000-EC-
E/IE
WTU
1500-EC-
E/IE
WTU
2000-EC-
E/IE
Manufacturer
Orcon
Typology
Non-residential ventilation unit (NRVE);
Two-way ventilation unit (TVE)
Drive
Variable
Thermal efficiency [1]
%
75
73
73
76
75
75
Nominal flow rate @
100Pa
m3/h
200
440
800
1000
1200
1700
Maximum flow rate @ 0Pa
m3/h
374
760
921
1425
2280
2780
Electrical input
power at nominal
air volume
W
44
97
244
256
351
462
SFPint [1]
W/(m3/
s)
4.3
6.3
8.2
5.3
8.8
7.3
Design flow rate
m/s
0.6
0.8
1.1
1
1.2
1.3
Decrease of internal
pressure of ventilation
parts (Ps,int)
Pa
67
113
240
164
226
218
Static efficiency tower
(EU) No 327/2001
%
41
44
50
49
54
58
External leakage
%
2.3
1.9
0.4
0.2
1.3
0.6
Sound power level of
WTU-E cabinet
(LWA
)
38
46
45
43
48
46
Energy efficiency filters
A+
Warning signal filters
On the display
Service and downloads
www.orcon.nl/
service

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4.Dimensions (WTU-EC-E / IE series)
All dimensions are in millimetres.
*The space needed to carry out maintenance is indicated by size S.
All dimensions are in millimetres.
* The space required for maintenance is indicated by size S.
A
B
C
D
E
S *
Weight
(kg)
WTU-250-
EC-E
750
907
296
160
404
700
34
WTU-600-
EC-E
922
1130
344
200
499
700
46
WTU-800-
EC-E
1014
1214
410
250
589
760
51
WTU-1000-
EC-E
1294
1606
410
300
719
760
79
WTU-1500-
EC-E
1128
1807
552
355
623
800
97
WTU-2000-
EC-E
1428
1807
552
355
921
800
106
A
B
C
D
E
S *
Weight
(kg)
WTU-250-EC-
IE
808
956
358
160
404
700
52
WTU-600-EC-
IE
981
1186
416
200
505
700
83
WTU-800-EC-
IE
1071
1264
472
250
590
760
97
WTU-1000-EC-
IE
1351
1657
472
300
720
760
135
WTU-1500-EC-
IE
1185
1856
614
355
623
800
164
WTU-2000-EC-
IE
1485
1856
614
355
921
800
179
E
ØD
C
A
S
B

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5.Technical specifications (WTU-EC-TA series)
The table below shows the specifications according to EU Regulation 1253/2014.
1] Measured at balanced volumetric flow according to EN 308
WTU
600-
EC-TA
WTU
800-
EC-TA
WTU
1000-
EC-TA
Manufacturer
Orcon
Typology
Non-residential ventilation unit (NRVE);
Two-way ventilation unit (TVE)
Drive
Variable
Thermal efficiency [1]
%
82
82
82
Nominal flow rate @ 100Pa
m3/h
500
750
1000
Maximum nominal @ 0 Pa
m3/h
760
869
1288
Electrical input power at
nominal air volume
W
144
242
277
SFPint [1]
W/(m3/
s)
7.4
9.6
7.0
Design flow rate
m/s
1.3
1.4
1.5
Decrease of internal
pressure of ventilation
parts (Ps,int)
Pa
133
187
143
Static efficiency of
ventilators (EU) No
327/2001
%
45
50
49
External leakage
%
0.1
0.2
0.3
Internal leakage
%
1.9
1.6
2.3
Cabinet sound power level
(LWA)
44
48
47
Energy efficiency filters
A+
Warning signal filters
On the
display
Service and downloads
www.orcon.nl/service

10
6.Dimensions (WTU-EC-TA series)
All dimensions are in millimetres.
* The space needed to carry out maintenance is indicated by size S.
A
B
C
D
E
S *
Weight
(kg)
WTU-600-EC-
TA
934
1325
355
200
499
700
64
WTU-800-EC-
TA
1024
1387
400
250
589
760
71
WTU-1000-EC-
TA
1304
1780
410
300
719
760
113
E
ØD
C
A
S
B

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7. Installation
NOTE
• The value for S is given in sections 4 and 6.
•The access doors to the fans are located under the WTU. During installation, ensure that there is
sufficient free space to remove the fans.
• Preferably position the supply air grilles and the return air grilles as far apart as possible so that
the entire room is ventilated.
• Place control valves in the ducts if multiple extraction grilles are installed.
• All electrotechnical operations and connections must be carried out according to and comply with
the legal requirements.
Fan service cap (located under the unit)
CBA duct heater
(Highly
CBRF pre-heater
(mandatory with WTU-TA
S
CAUTION
When installing the air
ducts, avoid
as far as
possible the
following
situations:
Side view
WTU

12
Attaching the flanges for the air ducts
The flanges of the air ducts are mounted
upside down on delivery to protect them
during transport.
Before installing the WTU, the flanges must
be removed. Then apply sealant to the
flange to prevent air leakage. After this, the
flanges can be attached to the housing of
the WTU by using the
using the same screws and the existing screw holes.
Prepare the threaded endsInstallation of the WTU
Hang the WTU with the
suspension brackets on the
anchor bolts and fasten them
so that the WTU
is installed horizontally. Lock
the lower nut with a second nut
to prevent it from coming
loose.
WARNING
Check that no (sealant) residue
is left in the WTU.
WARNING
Check the stability of the anchor bolt
during installation.

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Connecting condensate drain (TA series)
The condensation water must be drained off to prevent water damage to the unit or
ducts. The hose connection is located underneath the unit. A reinforced hose with
an internal diameter of 10 mm and a maximum length of 1.5 m must be connected
to this. The condensation water must be drained via a siphon into the sewerage
system, see diagram below.
Then fit the condensation drain hose into the hose connection; the condensation drain
must not be kinked. Pour water into the drip tray to create a water trap and also check
the condensate drain for leaks.
Points of attention:
1. A hose clamp should be used so that the drain can be easily dismantled
and cleaned later.
2. The drain hose must be placed at an angle and may not kink, so that the water
can drain off easily. It is absolutely forbidden to connect the hose directly to the
sewage system (because of odours).
Bottom view Side view

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8. Connecting accessories
All electrotechnical operations and connections must be carried out
according to and comply with the legal requirements.
Connecting the CO2 sensor (WTU-EC-E/IE/TA)
The units of the WTU-EC-E/IE series can be controlled by an air quality sensor. This can
be done via a CO2 room sensor or a CO2 channel sensor.
CO2 room sensor
Connect the 0-10V signal from the sensor (terminal 8) to terminal 2 of the WTU
terminal strip. Connect terminal 7 (GND) to terminal 3 (AGND) of the WTU terminal
strip.
Always use a separate switched-mode power supply for the room sensor.
(Article no: 17700120)
CO2 channel sensor
The CO2 channel sensor can be connected directly to the WTU terminal strip. Connect the
brown wire (0-10V) to terminal 2, the red wire (+24V) to terminal 5 and connect the
black wire (GND) to terminal 3 (AGND) of the WTU terminal strip.
After connecting the CO2 sensor, it must be configured in the controller (see page21).
Connecting MTV-3 switch
The devices can be controlled by an MTV-3 switch by means of a 0-10V signal.
The MTV-3 can be connected to terminal 1 (+10 Volt), terminal 2 (0-10v) and with
terminal 3 (AGND).
After connection, the MTV-3 must be activated as CO2 sensor in the controller
(see page 22).
Connecting CBA reheater to WTU-EC-E/IE/TA
The electric duct heater can be installed horizontally in any position except for the
position where the terminal box faces downwards. In case of a vertical installation, the
air flow should be directed upwards. When installing the CBA duct heater, observe the
minimum distance from the WTU
(at least 2x duct diameter). The temperature sensor should be mounted at a distance of at
least three times the duct diameter after the reheater.

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The reheater is controlled by the WTU with a 0-10V signal. Therefore, terminal 9
(-) of the CBA must be connected to terminal 11 (GND) of the WTU and terminal
10 (+) of the CBA to terminal 10 (0-10V) of the WTU.
When connecting the CBA reheater, the temperature sensor supplied with it must also
be connected to the WTU controller. The temperature sensor must be connected
directly to Analog Input 4 (AI4/contact 35) and Analog Earth (AGND/contact 33) of
the controller. The temperature sensor (supply air temperature sensor) connected to
AI4 must first be disconnected from AI4. The AGND already connected on the
controller should remain, the new sensor should be connected to the free AGND
(contact 33).
After connecting the CBA reheater, it must be configured in the controller (see
page 22).
Connecting to Building Management System (GBS/BMS)
The WTU can communicate with a Building Management System according to a
MOD-bus or BAC-net protocol. For this, a TCP/IP or RS485 cable must be laid
between the WTU and the Building Management System.
For the most up-to-date bus list see www.orcon.nl/BMS

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Note: The connections shown in a
box are optional.
Electrical Connections - WTU-EC-E/IE/TA

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9. Display
Installing the operating display
The control panel is supplied with a 10m cable connected to the Regin controller. If
required, the 10m cable can be replaced by a cable up to 100m long. Determine a
suitable place for mounting the control panel.
control panel. If necessary, drill two holes in the wall to hang the control panel
(centre-to-centre: 60 mm).
A
B
C
1
2
3 5
4 6

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Position
description: 1
Mounting holes
2.Terminal block
3.Connection - brown
cable 4 Connection -
yellow cable
5 Connection - white
cable 6 Connection - black
cable
Control panel dimensions
Dimensions in mm
A
B
C
D
E
115
94.0
26.0
60.0
50.5

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Explanation Control display
For a more detailed description of how to operate the controller in the WTU,
download the "Corrigo User Manual.pdf" at www.orcon.nl/wtu-etool.
Running through menus
The start screen is the beginning of the menu structure. You can use the up and
down arrows to scroll through the menu options. Sometimes a menu item has a
submenu. This is indicated by an arrow on the right of the screen. Clicking on the
button with the right arrow opens the submenu. (You must have the appropriate
rights to do this). By clicking on the left arrow, one returns to the previous menu
level.
Posit
ion
Statement
1
Alarm button: gives access to the list of alarm messages
2
Alarm LED: indicates an alarm message by flashing red.
3
Input LED: indicates by flashing yellow that parameters can be set or changed.
4
OK button: Press this button to change or set parameters where possible. Also used to
switch between parameters to be set in a dialogue box.
5
Cancel button: Used to cancel a change and return to the initial setting.
6
Left/Right & Up/Down Arrows: used to move up, down, left and right through the menu
structure. The up/down arrows are also used to increase/decrease values when setting or
changing parameters.
1
2
6
3
4
5

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Start settings
When starting the WTU for the first time, the controller starts a program for setting
the following settings once:
Step 1Language,
Step 2 Return air temperature set point
, Step 3 Time & date and
Step 4weekly schedule for setting normal and reduced ventilation.
The following applies to all programmes:
• Press OK to select a parameter.
• Use the up/down arrows to change the parameter.
• Press OK to confirm a changed parameter.
Step 1
Select the desired "Language".
Select language >
Dutch
Go to the next level by
clicking on the 'down'
arrow.
Step 2
Set the desired return air temperature (see the
Return air temp.
explanation 'Return air temperature' below).
Measured: ...°C
This is 21 °C as standard (log on to service level,
Desired: 21 °C
code 2222, to change default setting).
Step 3
Check that the correct time and date are
Time: ...
displayed. If this is not the case, you must use the
Date: ...
Change settings.
Weekday: ...
Step 4
Weekly schedule
Full speed
a. Set the weekly schedule (Monday to Friday)
Monday -> Friday
with the periods when the WTU is at normal speed
Per. 1: 09:00 - 17:00
must be ventilated. There can be 2 periods per
day
Per. 2: 00:00 - 00:00
be set.
b. Set the weekend and holiday schedule with the
Full speed
periods when the WTU is running at normal speed
Saturday ->Holiday
must be ventilated. There can be 2 periods per
day
Per. 1: 00:00 - 00:00
be set.
Per. 2: 00:00 - 00:00