Rehau NEA HT 24V User manual

NEA WIRING CENTRE
NEA HT 230V /24 V

EN
INSTALLATION INSTRUCTION
Supplied in the packaging
1x 2x
Introduction
Before working with the NEA wiring centre, this instruction is to be
read completely and thoroughly. This instruction must be kept and
handed over to future users. You can view and download these
instructions and more at www.rehau.uk/neafamily.
Safety
Intended use
Depends on the power supply of the wiring centre, the REHAU NEA
wiring centre serves
- for the installation of a single-room control up to 6 zones for heating
applications.
- for the installation of up to 6 NEA room controllers 230 V or 24 V (do
not mix 230 V and 24 V).
- for the installation of up to 15 REHAU (UNI) actuators 230 V or up to
15 REHAU (UNI) actuators 24 V (do not mix 230 V and 24 V).
- for the connection of an external timer.
-
The REHAU wiring centre only serves for fixed installations.
Safety instructions
All safety notes in this instruction must be observed in order to avoid
accidents with personal damage or property damage.
Serious danger is present due to applied voltage at the wiring
centre!
- Only an authorised person may open the device.
- Always disconnect from the mains and make safe before opening.
- Disconnect external voltages and confirm isolation.
- Only use the product if it is supplied as new.
- Do not operate the device without device cover in place.
- Caution when using this device persons should be knowledgeable,
supervised or instructed concerning the safe use of the device and
understands the resulting risks. This also applies when used or
operated by children from the age of eight (8) years or persons with
reduced physical, sensory or mental abilities or lack of experience.
- Ensure that no children play with the product.
- In case of emergency, disconnect the complete room temperature
control system.
Requirements with regard to personnel
The electrical installations must be performed according to the current
national regulations as well as according to the regulations of your
local energy supplier. It is recommended that persons carrying out
work on this device is suitably qualified to do so. For example:
- Heating and ventilation
- Approved Electrical Installer
- Electronics Engineer
as in accordance to the profession designations ocially announced
in the UK, as well as according to comparable professions within the
European Community Law.
Device overview
Connections and indications
The following instructions show the full equipment. Depending on the
wiring centre type several positions may be omitted.
HZ 1
L/L1
=>
=> => => => =>
N/L2
CO
L/L1
NC
0min 5min
N/L2
Nachlaufzeit
Shut-down delay
24V => T2A
230V => T4A H
CO
CO
90mm
8..9mm
L/L1
N/L2
CO
L/L1
N/L2
CO
L/L1
N/L2
CO
L/L1
N/L2
CO
L/L1
N/L2
CO
L/L1
N/L2
CO
L/L1
N/L2
CO
L/L1
N/L2
CO
HZ 2 HZ 3 HZ 4 HZ 5 HZ 6 HZ 7 HZ 8 HZ 9
HZ 10
L1‘24V L2‘ L1 L2
NO
10min 15min
2 32 3
2 32 3
AAAA
=> =>
AB
=> =>
BBBB
BA
TB
%H
230V N‘ L N
L‘
1 987632
12 11
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1. Boiler connection
2. Pump connection
3. Protective conductor connection
4. Voltage supply
5. Fuse
6. Temperature limiter or dew point sensor
7. Reduction channel, external timer
8. Heating/cooling change-over
9. Thermostat connection
10. LEDs
11. Strain relief
12. Connection of actuators
13. DIP switch
14. Contacts for casing cover with integrated system clock
Technical data
Operating voltage Wiring centre NEA HT 24V
Wiring centre NEA HT 230V
24V ±20 %, 50 Hz
230V ±10 %, 50 Hz
Power consumption 24 V
230 V
30 VA
50 VA
Fuses 24 V
230 V
T2A
T4AH
Number of heating
zones
6
Max. number of
thermostats
6
Actuators 6 heating zones max. 15 (230V)
max. 15 (24 V)
Nominal load of all
actuators
max. load 24 W
Pump/boiler control Yes
59
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2

EN
Switching power 2 A 200 VA inductive
Turn on delay 2 mins
Follow-up time fixed/
adjustable
2 mins/ 5-15 mins
Valve protection
function*
14 days for 10 minutes
Pump protection
function*
14 days for 1 minute
Control direction NC or NO supplied NC
values selectable
Ambient temperature 0 to +50°C
Storage temperature -20 to +70°C
Ambient humidity 80% non-condensing
Protection class 24 V
230 V
III
II
Type of protection IP 20
Dimensions
(H x L x D)
90 x 326.5 x 50 mm
Weight 427.6 g ±35g
* when used with NEA H and NEA HT room controllers (value is adjustable)
Compliance
This product is CE marked and thus is in compliance with the
requirements from the guidelines:
- 2004/108/EG with amendments “Council Directive on the approxi-
mation of the laws of the Member States relating to Electromagnetic
Compatibility”
- 2006/95/EG with amendments “Council for Coordination of the
Regulations of EU Member Countries regarding the electrical
equipment for use within certain voltage limits”
- 2011/65/EU “Restriction of the Use of Certain Hazardous Substan-
ces in Electrical and Electronic Equipment”
Increased protection requirements may exist for the overall installati-
on, the compliance of which is the responsibility of the installer.
Installation
1. Remove the cover.
2. Installing the wiring centre. In case of wall mounting, fix the base
to the wall with 2 screws Ø 4 mm and corresponding wall plugs
according to the quality of the wall. In case of installation on a
mounting rail, use a rail TS 35/7.5.
3. Terminate electrical connections.
4. Reinstall the cover.
5. Test the installation before applying
Jump switches
- Three switches
- Switch 1 alters the actuator control direction operation from
normally open (NO) to Normally Closed (NC)
- Switch 2 and 3 increases the operation time to 5, 10 and 15
minutes.
Boiler and pump timing
Comes with a standard delay of 2 minutes for both pump and boiler
(on and off) i.e. jumper switches 2 and 3.
Time Jumper 2 Jumper 3
0 minutes OFF OFF
5 minutes OFF ON
10 minutes ON OFF
15 minutes ON ON
Electrical connection
For the connection of the mains voltage supply, the cable sections
must be a minimum of 0.75 mm² for 24 V or 1.5 mm² for 230 V. The
voltage supply of the 24 V version must come from a safety transfor-
mer according to EN 61558-2-6 or, for North America, from a Class II
Transformer according to UL. Depending on the voltage version of the
wiring centre it is possible to tap L1 or L or L2 respect. N as well as
the protective earth via the wiring centre. If no temperature limiter is
connected, the connection TB/%H must be bridged. Once a tempera-
ture limiter or a dew-point sensor is connected, the bridge must be
removed.
The temperature limiters are normally closed contacts.
The wiring of the controller depends on the wiring centre used. For
wiring purposes, please observe the instructions of the thermostat or
of the respective component.
Symbols
+
-
Controller NEA
Actuator
Pump
~
Voltage source
Temperature limiter
System clock
CO Heating/cooling change-over
Cooling
Heating
Wiring diagram included at the end of the document.
Maintenance
Fuse change
WARNING! ELECTRICAL VOLTAGE! DANGER TO LIFE
12A
2B
3

EN
Before opening the controller disconnect the wiring centre from mains
and ensure it is isolated and locked to stop it from being switched on
again.
Disconnect external voltages and secure against unintended
activation.
2
T2A
24V
230V
T4AH
13
Cleaning
Only use a dry and solvent-free, soft cloth for cleaning.
Dismantling
WARNING! Electrical voltage! Danger to life!
- Before opening the controller disconnect the wiring centre
from mains and ensure it is isolated and locked to stop it from being
switched on again.
- Disconnect external voltages and secure against unintended
activation.
- Isolate the complete installation.
- Remove the wiring to all externally connected components.
- Disassemble the wiring centre and if necessary dispose it properly.
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EN
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EN
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EN
© REHAU Ltd
Subject to technical changes.
954619 EN 04.2016
Follow REHAU Underfloor:
UK HEAD OFFICE
Rehau Ltd, UK Head Oce, Hill Court, Walford, Ross-on-Wye, Herefordshire HR9 5QN Phone: [phone] Fax: [phone]
UK & IRELAND SALES OFFICE
London, REHAU Ltd, The Building Centre, 25 Store Street, London WC1E 7BT Phone: [phone] Fax: [phone] Slough, Units 5 J & K, Langley Business Centre, Station
Road, Langley, Slough SL3 8DS Phone: [phone] Fax: [phone] Manchester, Brinell Drive, Irlam, Manchester M44 5BL Phone: [phone] Fax: [phone]
Glasgow, Phoenix House, Phoenix Crescent, Strathclyde Business Park, Bellshill, North Lanarkshire ML4 3NJ Phone: [phone] Fax: [phone] Dublin, 9 St. Johns Court,
Business Park, Swords Road, Santry, Dublin 9 Phone: 00353 (0)1 8165020 Fax: 00353 (0)1 8165021
Our verbal and written application engineering advice is based upon experience and the best of our knowledge. However it is to be regarded as non-binding information.
Working conditions and use under conditions for which the product was not intended and over which we have no influence exclude any claim resulting from our information. We
recommend that a suitable check is made as to whether the REHAU product is suitable for the envisaged purpose. Application, use and processing of the products is carried out
beyond the scope of our control and are therefore carried out exclusively at your own responsibility. If liability should still apply, then this is restricted, in the case of all damage,
the value of the goods supplied by us and used by you.
Our warranty applies to the consistent quality of our products as per our specification and in accordance with our general terms and conditions of delivery and payment. This
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www.rehau.uk/neafamily
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