nvent HWAT-ECO Používateľská príručka

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Model
HWAT-ECO
Typ
Používateľská príručka

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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)
2 | nVent.com
3
148 mm
1
2
A
B
C
nVent.com | 3
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 ener
gy saving operation of HWAT 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 ener
gy saving operation of HWAT heating cable
Mikroprozessorgesteuerter Temperatursteller
Zum energiesparenden Betrieb der Temperaturhaltebänder HWAT
Modulateur de Température electronique
Pour l'application economique des rubans HW AT
A
B
4 | nVent.com
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
A
in 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.
7
Arrow Keys : to change menu selection or positioning the cursor.
8
Display 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
B
in flip-out coverpage.
The box contains the following parts:
9
HWAT-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
1.1 Purpose ...................................................................................................... 8
1.2 Technical data ............................................................................................8
1.3 Care and maintenance .............................................................................. 9
2. INSTALLATION ...............................................................10
2.1 Disassembling the unit ............................................................................ 10
2.2 Wall mounting instructions .....................................................................10
2.3 Installation 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
3.1 Quick 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
3.2 Menu overview ......................................................................................... 16
3.3 Menu 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
5.1 Country code ............................................................................................ 23
5.2 Pipe size, Insulation and Temperature ...................................................23
5.3 Legionella prevention by temperature shock .........................................26
5.4 Checklist 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
G
and
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.
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2.3 Installation of cables and sensors
nVent insists on the use of a 30 mA residual current device and
a C-characteristic circuit breaker to provide maximum safety and
protection from fire.
2.3.1 Wiring diagrams
There are three wiring diagrams: C, D and E (see 5.5 Diagrams).
For connection of a single unit: Diagram
C
pag. 31
F1: Circuit breaker 20 A max. (C-Characteristic).
F2: Residual current device 30 mA.
For multiple unit connection on one phase system:
Diagram
D
pag. 32
F1, F3, F5: Circuit breaker 20 A max. (C-Characteristic).
F2, F4, F6: Residual current device 30 mA
For multiple unit connection on a three phase system:
Diagram
E
pag. 32
F1: Circuit breaker 3 x 20 A max. (C-Characteristic)
F2: Residual current device 3 x 30 mA
Double-pole electrical protection might be needed to comply with local
electrical standards.
2.3.2 Minimum power cable sizing
Fig. 2
C - Characteristic circuit breaker
10A 13A 16A 20A
Minimum
cable size
3 x 1,5 mm² 3 x 1,5 mm² 3 x 1,5 mm² 3 x 2,5 mm²
Use solid core wires for 1,5 mm² diameters.
Ensure that the installation is compatible with applicable local electrical
requirements.
Warning: As over voltage protection (e.g. in case of thunderstorm) we
recommend the use of an external over voltage protection device.
2.3.3 Heating cable
Fig. 3
Achievable
temperature
Heating cable
Ambient temperature
10°C 15°C 20°C 25°C
HWAT-L (Yellow) 37 - 44˚C 37 - 46˚C 37 - 50˚C 37 - 52˚C
HWAT-M (Orange) 37 - 50˚C 37 - 52˚C 37 - 56˚C 37 - 58˚C
HWAT-R (Red) 37 - 64˚C 37 - 66˚C 37 - 68˚C 37 - 70˚C
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Above values are indications and depend on the insulation thickness.
Complete the heating cable tests (including the insulation resistance
test) in accordance with 5.4 (Checklist
for problem-free installation and safe
operation).
2.3.4 Boiler- Temperature Sensor
(KTY or PT100)
The temperature sensor must be
connected to a single or master unit
only. Connect both wires of the sensor
to the TEMP terminal in the unit, see
Fig. 4. The sensor wires do not have
a special polarity. To connect a wire
use a screwdriver to push down the
orange tab on the side of the terminal.
Put the wire into the hole and release
the orange tab. The sensor should be
connected as near as possible to the
boiler (5.5 Diagrams).
The metal tabs can be folded around
the hot water output pipe. Use the
aluminium tape (included) to attach the
sensor to the pipe. The sensor andat
least 200 mm of the sensor cable
should be covered by insulation.
See diagramm A. Be careful not to install the heating cable too close
to the sensor, keep a clearance of at least 200 mm. The standard
temperature sensor cable can be extended up to 100 meter. The
extension cable should have a basic insulation of 500 V and a solid core
of at least 0,75 mm² (@ 100m). The optional PT100 sensor cable must
not exceed 20 meters (Fig. 4).
2.3.5 Alarm wiring
The alarm contact (24 VAC, 24 VDC, 1A) inside the unit can be used to
switch an external device. The contact can be selected for NO or NC
operation. In a network all alarm contacts should be connected in series.
The alarm terminal is located in the upper right corner of the unit and has
the text “alarm contact” next to it. To connect a wire use a screwdriver
to push down the orange tab on the side of the terminal. Put the wire
into the hole and release the orange tab. The wires used for the alarm
contact should have a dielectric strength of 500 V.
See Chapter 4 for alarm relay conditions.
Note: For master/slave combination with alarm function, the alarms
need to be connected in series by a RS485 shielded wire. Due to the
limited amount of holes in the sealing ring of the cable gland, the alarm
wire and BMS wire can be combined in a 4 wire cable.
NC NO
Alarm contact
C
Standard temperature sensor
short
for
PT100
PT100 sensor (2 wire)
BA
BMS
TEMP
BA
BMS
TEMP
Terminals
inside the
HWAT-ECO.
Fig. 4
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2.3.6 Network
See 5.5 Diagrams, diagram
B
. The HWAT-ECO unit can be used in a
system with up to 9 units. All units should be connected to each other on
the A and B inputs in parallel on terminal, see Fig. 4. This means that
several units will have two wires together in one hole. Twist the two
wires together before putting two wires into one hole. The wire should be
a twisted pair, shielded MONI-RS485-Wire and have a dielectric strength
of 500V. The total maximum length of this cable between all units is 100
m. Be careful not to mix A and B connections. The shield of the RS 485
cable: needs to be connected to the “–” terminal at the master and at the
slaves, (5.5.1 Fig B).
To connect a wire use a screwdriver to push down the orange tab on
the side of the terminal. Put the wire into the hole and release the
orange tab.
2.3.7 Building Management system (BMS)
See 5.5 Diagrams, diagram
B
. The BMS input of the HWAT-ECO is an
analogue 0 to 10 Volt input. If the unit is programmed to have a BMS
connection, this will override any time programming (see BMS page 18).
Note: It only can be received 0-10V input signals: it will be not sent
signals to the BMS.
Connect both wires of the 0-10 V output to the BMS terminal inside the
HWAT-ECO, see Fig. 4. Connect the ground wire to the “–” and the 0-10
V output to the “+” terminal. To connect a wire use a screwdriver to push
down the orange tab on the side of the terminal Put the wire into the
hole and release the orange tab. The wires used to connect BMS to the
HWAT-ECO should have a dielectric strength of 500 V. To connect a wire
use a screwdriver to push down the orange tab on the side of the terminal.
Note: Due to the limited amount of holes in the sealing ring of the cable
gland, the alarm wire and BMS wire can be combined in a 4 wire
shielded cable.
3. OPERATION
The HWAT-ECO version 4 has six buttons: Up/Down/Left/Right arrows,
Enter and Escape.
In the table on the next page is an overview of all menu items. Press any
button, except ESC, to enter the menu. When ESC is pressed the unit
shows the current requested water temperature. The unit will exit the
menu automatically after five minutes of key inactivity. 
3.1 Quick install
When the unit is powered up for the first time, a quick setup must be
executed before the unit is ready to start. The quickstart helps to set
all important settings, the unit will start automatically when done.
Quickstart is sufficient for normal operations. More settings are
available in the Setup menu for special installations.
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During the quick start the ESC button can be used to go back to a
previous menu. On startup the display will show the following text:
Press a key to start, and the following
menus appear:
3.1.1 Language
With the up/down arrow keys you can choose between 5 languages,
English, German, French, Danish, Italian and Czech. Press Enter to
confirm your choice.
3.1.2 Year/ Month/ Day /Hour/ Minutes
Select the year with the up/down arrow keys and press Enter to confirm.
Then select and enter the Month, Day, Hour and Minutes.
3.1.3 Cable type
Use the up/down arrow keys to select the HWAT-R (Red), HWAT-M
(Orange) or HWAT-L (yellow) cable. Select the type of cable used in your
installation. Press Enter to confirm your choice.
3.1.4 Cable length
The minimum cable length is 1 m. The maximum cable length depends
on cable type and circuit breaker capacity (See installation). Use the up/
down arrow keys to select from 1 to the maximum length (see page 10
for max. length).
Press Enter to confirm your choice.
3.1.5 Ambient temperature
The ambient temperature is the temperature inside the room where the
heating cable is installed. Use the up/down arrow keys to select from
0°C to 25°C. Press Enter to confirm.
3.1.6 Country
Select a country in this menu. This is used to set the default values
for pipe diameter and insulation thickness. For more information see
Appendix 5.1, page 23.
3.1.7 Maintain temperature
The maintain temperature is the water temperature that you set for
normal use. The temperature can be selected using the up/down arrow
keys. The minimum temperature is 37°C or the economy temperature,
whichever is higher. The maximum temperature depends on cable type,
pipe thickness, insulation thickness and ambient temperature
(see Fig. 3, page 11). The programmed maintain temperature can be
displayed by pushing the escape key once the system is in operation.
3.1.8 Economy temperature
The economy temperature is the water temperature for periods during
which hot water is not usually tapped (at night) or when lots of hot water
is tapped (peak period). The temperature can be selected using the
Quick install
Any key to start
nVent.com | 15
up/down arrow keys. The minimum temperature is 37°C in Kinder garden
and 41°C in apartments and the maximum temperature is the selected
maintain temperature.
3.1.9 Pre-Programs
The HWAT-ECO has 7 default timer programs. See 5.5.2 Diagrams,
page 34 for more information. A pre-program can be selected using the
up/down arrow keys. Press Enter to confirm your choice. HWAT-ECO
takes a few seconds to copy the default program to the internal memory.
During this time a row of dots will show in the display.
Fig. 5
Program name Diagram
number
Building type
Constant I - 0 Constant temperature
Apartments I - 1 Apartment block
Prison I - 2 Prison
Hospital / Nursing Home I - 3 Hospital / Nursing Home
Hotel I - 4 Hotel
Sport Centre I - 5 Sport centre /
Swimming pool
Office I - 6 Office
3.1.10 Trace boiler
The trace boiler setting is included to ensure that the heating cable
temperature does not exceed the boiler temperature. The boiler
temperature is measured with the external temperature sensor.
The HWAT-ECO memorizes the highest measured temperature over
the last 24 hours. With the up/down arrow keys the setting can be
altered between OFF and ON with a temperature difference from 5°C
between boiler temperature and maintain temperature. Press Enter to
confirm your choice. If the boiler temperature is too low the maximum
temperature is lowered to the boiler temperature minus the trace
temperature. In this case the green trace boiler LED will be on.
3.1.11 Sound alarm
Inside the unit a smal buzzer sounds during an error condition.
With this setting you can switch the sound into different modes:
continuous, 10 minutes, 1 minute, 10 seconds or off.
Finishing “Quick install”
Press Enter to start the unit.
With ESC it is possible to retrace all menu items to check the settings.
After starting the unit the display shows date, time, temperature setting
and a * to indicate that the unit is unlocked.
16 | nVent.com
22-6-2011 09:13
Maintain *
Back to “Quick install”
The Setup menu (see next chapter) has a Reinitialise menu to start over
again. Previous settings are returned to default factory settings, except
time and date.
Note:
A menu can be consulted if further detailed settings (eg. Master/slave,
BMS, etc.) are required. You must press a key to access the menu
inside the HWAT-ECO. (Pressing ESC shows the current preferred cable
temperature.) Pressing another key shows the main menu. There are 6
main menus: Language, Time and Date, Setup, Timer program, Holiday
and Info.
3.2 Menu overview
1 Language English
Deutsch
Francais
Dansk
Italiano
2 Time and Date Year
Month
Day
Hour
Minutes
Select Year
Select Month
Select Day
Select Hour
Select Minutes
3 Setup 1 Maintain Temp. “Enter maintain temp.”
2 Economy Temp.  “Enter economy temp.”
3 Cable Length “Enter cable length”
4 Ambient Temp. “Enter ambient temp.”
5 Pipe Diameter Select 15 mm up to 100 mm
6 Insulation Select 9 mm up to 100 mm
7 Power Corr Select 60% up to 140%
8 Trace Boiler Select Off or On
9 Lock Lock/unlock Setup and Timer menus
10 BMS Select Yes/No
11 Network Master Select Yes/No
12 Reinitialise Select Yes/No
13 Alarm Sound Select into different modes:
continuous, 10 minutes, 1 minute,
10seconds or off.
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4 Timer program
(password
check if Lock
is On)
1 Default program Constant temperature
Apartment block
Prison/Barracks
Hospital/Nursing home
Hotel
Sport centre/Swimming pool
Office
2 Edit program Monday Edit timer for Monday
Tuesday Edit timer for Tuesday
Wednesday Edit timer for
Wednesday
Thursday Edit timer for Thursday
Friday Edit timer for Friday
Saturday Edit timer for Saturday
Sunday Edit timer for Sunday
5 Holiday setting 1 xx Days off
2 Off
3 On
6 Info 0 Software
1 Cable Type
2 Boiler T°
3 Internal T°
4 Display legionella log
5 Test programm
3.3 Menu explanation - extended features
3.3.1 Setup
When Lock is on (No star in the lower right corner) a password is needed
to access the following menus. After the correct 4 number password is
entered the setup menu is accessable. The unit locks again after
60 seconds timeout (no keys pressed).
When lock is off the following menus are directly accessable.
1. Economy Temperature
The economy temperature is the water temperature for periods during
which hot water is not usually tapped (at night) or when lots of hot water
is tapped
(peak period). The temperature can be selected using the up/down arrow
keys. The minimum temperature is 37°C and the maximum temperature
is the selected maintain temperature.
2. Pipe Diameter
Set the pipe diameter using the arrow keys The value can be changed
from 15 mm up to 100 mm. See Appendix 5.2, page 23 for more
information.
18 | nVent.com
3. Insulation
Set the insulation thickness with the arrow keys. The value can be
changed from 9 to 100 mm, but is limited by the pipe diameter. See
appendix 5.2, page 23 (‘Pipe size, Insulation and Temperature’) for more
information.
4. Power correction
Adjust the power setting for fine tuning the temperature. See
appendix5.2, page 23 (‘Pipe size, Insulation and Temperature’) for
moreinformation.
5. Lock
Lock On/Off can be selected using the up/down arrows and Enter to
confirm. If ‘On’ is selected a self-selected password must be entered
using the left/right and up/down arrow keys. Enter to confirm.
If lock is On, the Setup and timer menus are protected by the password.
After the password is entered the unit remains unlocked until five
minutes of key inactivity or the Lock ‘On’ is selected again.
6. BMS
The Building Management System option is activated using this menu.
When set to “Yes” the unit responds only to the voltage applied to the
BMS terminal. For voltages ≤ 4 VDC: heater is OFF. For voltages between
4,1 VDC and 6,4 VDC: maintain temperatures as indicated in Diagram
F, Chapter 5.5. For voltages > 6,4 VDC: 100% power to the heater for
legionella prevention (in case HWAT-R). See page 13 for installation.
If Trace Boiler is ON, it overrules the BMS temperature setting if
necessary.
7. Network Master
In large installations where more than 1 HWAT-ECOs are connected to
each other, one unit must be selected as Master. This unit should be
fully programmed and all slave units will use the Master settings. The
master unit sends commands to all slave units to switch them ON or
OFF. The timer program of the master unit will be used for all units in the
following way: Slave units on the same phase (max. three units) will have
a delayed ON and OFF. This way the start-up current of the cable will
never occur at the same moment for these units (A, B and C). Slave units
connected to a different phase will switch at the same time (1, 2 and 3). 
After selecting Master: Yes the slave units will initialise and show:
“Slave: x y” x= phase number (1 to 3) y= slave identification (A, B and
C).The master unit is always 1 A, the slave units will get their number
and identification automatically. Always check afterwards if all units
have unique id-numbers, if not check the RS485 cables and repeat this
procedure.
8. Reinitialize
If “Yes” is selected the Quick install menu is activated and all settings are
returned to factory settings.
nVent.com | 19
3.3.2 Timer program and legionella prevention
When Lock is ON a password is needed to access the following menus.
When lock is OFF the following menus are directly accessable (The
display shows a * in the lower right corner).
1. Default program
2. Edit program (incl. legionella prevention)
Timer programming is done graphically in 1/2 hour time blocks.
A block can be set to Off, Economy temp, Maintain temp, or 100% power
(100% only if HWAT-R cable is used).
Selection of temperature by up/down Arrow keys:
= Off = Maintain temperature
= Economy temperature = 100% power
(Legionella prevention
HWAT-R)
Selection of time block by hort./vert. Arrow keys:
Timer programming example from 00:00 to 08:00:
..........
00:00 – 00:30: 100% power
00:30 – 01:00: 100% power
01:00 – 01:30: 100% power
01:30 – 02:00: 100% power
02:00 – 02:30: Off
02:30 – 03:00: Off
03:00 – 03:30: Off
03:30 – 04:00: Off
04:00 – 04:30: Off
04:30 – 05:00: Economy
05:00 – 05:30: Economy
05:30 – 06:00: Economy
06:00 – 06:30: Economy
06:30 – 07:00: Maintain
07:00 – 07:30: Maintain
07:30 – 08:00: Maintain
..........
To calculate the time needed for legionella prevention
(100% power HWAT-R) see appendix 5.3 page 26.
20 | nVent.com
3.3.3 Holiday
This menu is used to set the unit Off, temporarily off or return to timer
program.
- xx Days off: A number of days can be selected. The unit automatically
returns to timer mode when the selected number of days have
passed.
- Off: The unit will not heat the water pipe until ‘Use timer’ is selected.
- On: The unit starts using the timer program.
3.3.4 Info
0 Software: Firmware version
1 Cable Type: Shows selected cable type
2 Boiler T: Shows temperature of external sensor. Press Enter twice to
update the sensor temperature.
3 Internal T: Shows internal temperature of the unit
4 Display Legionella log: Press ENTER to view a log of the legionella
programming. A maximum of 99 legionella events are saved and can
be reviewed here. Format day: month:year: number of legionella hours
5 Test program: This program can be used to test the heating cable. For
a maximum of 30 minutes after switching the test program on, the
cable will be heated. After 30 minutes or after pressing ESC the normal
programming will resume automatically.
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