nvent Raychem HWAT-ECO V4 User manual

ELECTRONIC TEMPERATURE CONTROL UNIT
For energy saving operation of HWAT-R/-M/-L
heating cable
MIKROPROZESSORGESTEUERTER
TEMPERATURSTELLER
Für den energiesparenden Betrieb der
TemperaturhaltebänderHWAT-R/-M/-L
MODULATEUR DE PUISSANCE ÉLECTRONIQUE
Pour une utilisation économique des rubans
HWAT-R/-M/-L
ELEKTRONICKÁ JEDNOTKA RÍZENÍ TEPLOTY
Pro úsporný provoz topného kabelu HWAT-R/-M/-L
HWAT-ECO (version 4)

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3
148 mm
1
2
A
B
C

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HWAT-ECO
!
esc
5
4
3
2
7
1
6
B
A
*8
2x
2x
HWAT 230V
HWAT-ECO
!
esc
11
12
13
9
10
14
HWAT-ECO
R
Electronic Temperature Control Unit
For energy saving operation of HW AT heating cable
Mikroprozessorgesteuerter Temperatursteller
Zum energiesparenden Betrieb der Temperaturhaltebänder HWAT
Modulateur de Température electronique
Pour l'application economique des rubans HWAT
HWAT-ECO
!
esc
5
4
3
2
7
1
6
B
A
*8
2x
2x
HWAT 230V
HWAT-ECO
!
esc
11
12
13
9
10
14
HWAT-ECO
R
Electronic Temperature Control Unit
For energy saving operation of HW AT heating cable
Mikroprozessorgesteuerter Temperatursteller
Zum energiesparenden Betrieb der Temperaturhaltebänder HWAT
Modulateur de Température electronique
Pour l'application economique des rubans HWAT
A
B

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ENGLISH
Description of indicator lights, buttons and display .................. 5
Contents ....................................................................................... 6
1. Description ............................................................................... 8
2. Installation ................................................................................ 10
3. Operation .................................................................................. 13
4. Error/ Alarms and Troubleshooting ........................................ 21
5. Appendix ................................................................................... 23
DEUTSCH
Beschreibung der Anzeigeleuchten, Tasten und Anzeige .......... 37
Inhalt ............................................................................................. 38
1. Beschreibung ........................................................................... 40
2. Installation ................................................................................ 42
3. Betrieb ....................................................................................... 46
4. Fehler/Alarme und Fehlerbehebung ....................................... 55
5. Anhang ...................................................................................... 57
FRANCAIS
Description des témoins, boutons et écrans .............................. 71
Table des matières ....................................................................... 72
1. Description ............................................................................... 74
2. Installation ................................................................................ 75
3. Utilisation .................................................................................. 79
4. Erreurs, alarmes et guide de dépannage ................................ 89
5. Annexes .................................................................................... 91
ČESKY
Popis kontrolních světel, tlačítek a displeje ............................... 105
Obsah ............................................................................................ 106
1. Popis ......................................................................................... 108
2. Montáž ...................................................................................... 110
3. Provoz ....................................................................................... 113
4. Chyba / Výstrahy a řešení problémů ....................................... 122
5. Příloha ....................................................................................... 124

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Description of indicator lights, buttons and display
See diagram Ain flip-out coverpage
Indication lights
1
!
esc
(green LED) Power supply ON.
2
!
esc
(green LED) Power to heater on.
3
!
esc
(green LED) Legionella prevention.
100% power to the heating cable.
4
!
esc
(green LED) Temperature limit warning:
boiler temperature too low.
5
!
esc
(red LED) Error, see chapter 4.
6
!
esc
Key Esc: Escape from current menu without changing actual selection
or value.
!
esc
Key Enter : Use to confirm selected choice, menu or value.
7Arrow Keys : to change menu selection or positioning the cursor.
8Display functions
The display has two lines with 16 characters each.
The display shows the following text
on start up: Quick install
Any key to start
After finishing quick install the display shows
date, time, temperature mode and a star to
indicate that the unit is unlocked.
22-6-2007 09:13
Maintain *
Packaging content
See diagram Bin flip-out coverpage.
The box contains the following parts:
9HWAT-ECO unit
10 Manual
11 Two screws
12 Two washers
13 Temperature sensor with 4 metre cable
14 Aluminium tape for sensor mounting

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1. DESCRIPTION ...................................................................8
1.1Purpose ......................................................................................................8
1.2Technical data ............................................................................................8
1.3Care and maintenance ..............................................................................9
2. INSTALLATION ...............................................................10
2.1Disassembling the unit ............................................................................10
2.2Wall mounting instructions .....................................................................10
2.3Installation of cables and sensors ..........................................................11
2.3.1 Wiring diagrams ..............................................................................11
2.3.2 Minimum power cable sizing .........................................................11
2.3.3 Heating cable ..................................................................................11
2.3.4 Sensor cable ...................................................................................12
2.3.5 Alarm wiring ....................................................................................12
2.3.6 Network ...........................................................................................13
2.3.7 Building Management System (BMS) ...........................................13
3. OPERATION ....................................................................13
3.1Quick install ..............................................................................................13
3.1.1 Language ........................................................................................14
3.1.2 Year/ Month/ Day /Hour/ Minutes ................................................14
3.1.3 Cable type .......................................................................................14
3.1.4 Cable length ....................................................................................14
3.1.5 Ambient temperature .....................................................................14
3.1.6 Country ............................................................................................14
3.1.7 Maintain temperature .....................................................................14
3.1.8 Economy temperature ....................................................................14
3.1.9 Pre-Programs ..................................................................................15
3.1.10 Trace boiler ...................................................................................15
3.1.11 Alarm sound on/off ......................................................................15
3.2Menu overview .........................................................................................16
3.3Menu explanation - extended features ...................................................17
3.3.1 Setup ...............................................................................................17
3.3.2 Timer program and legionella prevention .....................................19
3.3.3 Holiday ............................................................................................20
3.3.4 Info ..................................................................................................20

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4. ERROR/ALARMS AND TROUBLESHOOTING ..................21
5. APPENDIX ......................................................................23
5.1Country code ............................................................................................23
5.2Pipe size, Insulation and Temperature ...................................................23
5.3Legionella prevention by temperature shock .........................................26
5.4Checklist for problem-free installation and safe operation ...................29
5.4.1 Typical installation schedule for the HWAT-Plus system .............29
5.4.2 Circuit protection, Testing and Operation for all systems ...........29
5.5 Diagrams ..................................................................................................31
5.5.1 Diagrams A, B, C, D, E, F, G and H, Installation ..............................31
5.5.2 Diagram I, Pre-programs ................................................................34

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1. DESCRIPTION
1.1 Purpose
The nVent RAYCHEM HWAT-ECO control unit has been developed for
operation with the following self-regulating heater range: HWAT-R,
HWAT-M and HWAT-L. The hot water temperature maintenance system is
a comfort system providing instant hot water at the tap.
A self-regulating heating cable is positioned on the pipe and
compensates for any temperature loss of the warm water.
The HWAT-ECO control unit combines the following features:
• The operating temperature of the heater can be limited to a desired
temperature. Combined with the integrated power off timer function,
this offers important energy savings.
• Energy can be saved, upon activation of the “trace boiler” function
and installation of the boiler sensor. The maintain temperature of the
heater will automatically be lowered in case the boiler temperature
is reduced, preventing the heater from using too much energy for
heating the boiler water.
• On big warm water systems it is sufficient to program one
HWAT-ECO (= MASTER). The other ECOs (= SLAVES) will
automatically copy the MASTER settings when connected to it.
• HWAT-ECO can be connected to a BMS. The input of a remote DC
voltage will set the desired maintain temperature.
• An alarm terminal makes errors remotely readable.
• HWAT-ECO controller can be delivered in prefabricated panels,
according to quantity of heating circuits (3,6,9 and 12)
1.2 Technical data
Switching capacity 20 A / 230 VAC
Use Only for HWAT-R/-M/-L heating cables
Off- power 2,5 VA max.
Power cable section entry 1,5 - 4 mm² for fixed wiring only
Auxiliary cable section entry up to 1,3 mm² (16 AWG)
Automatic switching Type 1 action, according to EN60730
Weight 880 g
Size 165 mm x 85 mm x 71 mm
Mounting options Wall mount with two screws or DIN rail.
Cable glands (entries) 2 x M20 and 1 x PG13.5 with 3 inputs for
external wires of 3-5 mm
Master/slave cable 2-wire twisted pair cable shielded
MONI-RS485, max. 1,3 mm² core and
insulation of 500V

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Alarm contacts Max. 24VDC, or 24 VAC, 1A, SPDT,
Voltage free change-over contact
Protection level IP 54
Temperature sensor Standard PTC type KTY 82-210
Optional PT100 (0.39 Ohm/deg and
2-wire only)
Selectable temperature 37°C up to 65°C in 48 blocks per day.
Pre-programs 7 editable built-in building specific pre-
programs
BMS interface 0 – 10 V DC
Master/Slave Master is selectable in the unit, up to 8
slaves can be connected
Approval VDE according to EN60730
EMC According to EN50081-1/2 for emission
and EN50082-1/2 for immunity
Circuit breaker max. 20 A, C-Characteristic
Real Time Clock Automatic Summer/Winter time and
Leap year correction
Clock backup time 15 days with rechargeable battery;
after first start battery must be charged
48 hours at least
Clock accuracy ± 10 minutes per year
Settings All settings are stored in non-volatile
memory.
Operating temperature 0°C to 40°C ambient
Housing material ABS
Heat and fire resistance
category (DIN EN 60730/
VDE 0631-1)
D
Temperature for bal pressure
test (DIN EN 60730/ VDE
0631-1)
+100°C
Rated impulse voltage
(DIN EN 60730/ VDE 0631-1)
Overvoltage category III
1.3 Care and maintenance
To clean the HWAT-ECO use a soft cloth, water and soap, do not use
solvents. Do not pour water directly on the device. Do not use a water
hose or high pressure cleaner.

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2. INSTALLATION
This chapter is for installation purposes only, it contains no operational
information. The installation and, if necessary the maintenance and the
disassembling, must be carried out by a qualified electrical installer.
The installation must be compatible with local regulations. Check the
maximum circuit length for your circuit breaker in the next table:
Fig. 1
Maximum circuit length at 230 VAC and for 20°C start-up temperature
C-characteristic
circuit breaker
HWAT-L
(Yellow)
HWAT-M
(Orange)
HWAT-R
(Red)
10A 80 m 50 m 50 m
13A 110 m 65 m 65 m
16A 140 m 80 m 80 m
20A 180 m 100 m 100 m
Multiple units on multiple power point can be used if longer heating
cables are required. Up to 9 units can be connected on three phase
systems via the network configuration.
2.1 Disassembling the unit
Always switch off the mains supply (circuit breaker) before opening the
unit. Several touchable parts inside the unit are directly connected to
the mains voltage.
The HWAT-ECO has a removable top lid. Both top and bottom of the box
have electronic parts and are connected to each other by a 14-pin
connector. First unscrew the four screws in the lid. Pull the lid carefully
upwards, not sideways! Inside the unit an ABS separation sheet will help
to guide the connector when disconnecting. See 5.5 Diagrams Gand H
Closing the box
Position the lid in front of the wall-mounted bottom unit. The separation
sheet inside the unit will help to guide the lid and the connector. Push
the lid gently towards the bottom unit, the last part will offer some
resistance because of the connector pins.
2.2 Wall mounting instructions
The unit has two mounting options.
1. Inside the bottom part there are two holes, with the two supplied
screws and sealing rings the unit can be mounted to a wall.
2. The second mounting option is DIN-rail mounting. For both options
see the diagram with ruler on the flip-out coverpage.