nVent RAYCHEM HWAT-ECO-GF User manual

HWAT-ECO-GF
(Firmware version 1.1.5 or higher)
(Version du micrologiciel 1.1.5 ou
supérieure)
Installation, operation and maintenance manual
Manuel d'installation, d'utilisation et d'entretien
EN Electronic Control Unit
For safe and efficient operation of HWAT-Ror
HWAT-Pself-regulating heating cable
FR Modulateur de puissance électronique
Pour une utilisation économique des rubans
HWAT-Ror HWAT-P

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ENGLISH
1. Product Overview 6
2. Installation Instructions 7
3. Installation Notes 16
4. Operation 18
5. Parameter Settings (Default) 23
6. Technical Specifications 24
7. Appendix 29
FRENCH
1. Aperçu du produit 6
2. Directives d’installation 7
3. Notes D'installation 31
4. Fonctionnement 33
5. Réglages (Par défaut) 39
6. Spécifications techniques 40
7. Annexe 46

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Important Safeguards and Warnings
Warning: Fire and Shock Hazard
nVent RAYCHEM HWAT Systems must be installed correctly to ensure
proper operation and to prevent shock and fire. Read these important
warnings and carefully follow all the installation instructions.
To minimize the danger of fire from sustained electrical arcing if the
heating cable is damaged or improperly installed, and to comply with
nVent requirements, agency certifications, and national electrical codes,
ground-fault equipment protection has been built into the HWAT-ECO-GF
controller and must be used on each heating cable branch circuit. Arcing
may not be stopped by conventional circuit breakers. Approvals and
performance are based on the use of nVent parts only. Do not substitute
parts or use vinyl electrical tape. Bus wires will short if they contact each
other. Keep bus wires separated.
Connection kits and heating cable ends must be kept dry before and
during installation. The black heating cable core is conductive and can
short. They must be properly insulated and kept dry.
Damaged bus wires can overheat or short. Do not break bus wire strands
when preparing the cable for connection. Damaged heating cable can
cause electrical arcing or fire. Do not use metal attachments such as
pipe straps or tie wire. Use only nVent approved tapes and cable ties to
secure the cable to the pipe.
Do not attempt to repair or energize damaged cable. Remove damaged
cable at once and replace with a new length using the nVent RAYCHEM
RayClic-S splice kit. Replace damaged connection kits. Use only fire-
resistant insulation which is compatible with the application and the
maximum exposure temperature of the system to be traced.
WARNING: Water temperature above
130°F (55°C) presents a significant risk of
personal injury and/or death and requires
that scald protection measures be
implemented for safe use.

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Mises en garde et avertissements importants
Avertissement: Risques d'incendie et de chocs
Les systèmes nVent RAYCHEM HWAT doivent être installés
correctement pour assurer un fonctionnement approprié et pour éviter
les risques d'incendie ou de chocs électriques. Lisez attentivement les
mises en garde suivantes et suivez les instructions d'installation.
Pour minimiser le danger d'incendie causé par un arc électrique
entretenu, si le câble chauffant est endommagé ou mal installé, et pour
respecter les exigences de nVent, des organismes d'homologation
et celles du code national de l'électricité, il est impératif d'utiliser une
protection par disjoncteur différentiel sur chaque régulateur HWAT-ECO-
GF et sur chaque circuit alimentant un câble chauffant. Un disjoncteur
ordinaire peut ne pas être assez sensible pour prévenir les arcs continus.
Les homologations et le rendement reposent uniquement sur le recours
à des pièces nVent. Ne substituez pas de pièces ou n’utilisez pas de
ruban électrique en vinyle. Les fils omnibus peuvent être court-circuités
s’ils se touchent. Tenez les fils omnibus éloignés les uns des autres.
Les trousses de connexion et les terminaisons des câbles chauffants
doivent être tenues au sec avant et pendant l’installation. Le noyau du
câble chauffant noir est conducteur et peut occasionner des court-
circuits. Il est nécessaire d’isoler adéquatement les câbles et de les tenir
au sec.
Les fils omnibus endommagés peuvent surchauffer et occasionner
des court-circuits. Portez attention pour ne pas casser les brins du fil
omnibus lors de la préparation du câble aux fins de raccordement. Un
câble chauffant endommagé peut provoquer des chocs électriques, des
arcs et des incendies. N'utilisez pas de pièces de fixation métalliques, par
exemple des courroies ou des fils d’attache. N’utilisez que des rubans et
des attaches approuvés par nVent pour attacher le câble au tuyau.
N'essayez pas de réparer ni de brancher un câble chauffant endommagé.
Retirez-le immédiatement et remplacez-le par un neuf à l’aide de la
trousse d’épissure nVent RAYCHEM RayClic-S. Remplacez les trousses
de connexion endommagées.
N’utilisez qu’un isolant ignifuge compatible avec l’application et avec la
température d’exposition maximale du système à installer.
AVERTISSEMENT : température de l’eau supérieure
à 55 ° C (130 ° F) présente un risque important de
blessure et / ou de mort, et impose que des mesures
de protection contre l’échaudure soient mises en place
pour une utilisation en toute sécurité.

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1. PRODUCT OVERVIEW
A
B
C
HWAT-ECO-GF
HWAT-ECO-GF
1x
1x
2x M20
PCN: 1244-020365 PCN: 1244-015847
2x 2x
1x
1x
1x
1x
1x

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2. INSTALLATION INSTRUCTIONS
1A
1B
5
2
150 mm

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3
4
5
1
2
A
B
C

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6L
L
L
N
AC 230 V~
25
X4
X2
X1 X3
123
X5 X7
1234
NO NC S1 S2
COM
Alarm contact
12
1212 SELV
class 2 area
N
L/ LN/ PE PE

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7
X4
X2
X1 X3
1 2 3 X5 X7
1234
NO NC S1 S2
COM
Alarm contact
12
1212 SELV
class 2 area
N
L/ LN/ PE PE

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8
X4
X2
X1 X3
123X5 X7
1234
NO NC S1 S2
COM
Alarm contact
12
1212 SELV
class 2 area
N
L/ LN/ PE PE

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9
X4
X2
X1 X3
123X5 X7
1234
NO NC S1 S2
COM
Alarm contact
12
1212 SELV
class 2 area
N
L/ LN/ PE PE

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10
X4
X2
X1 X3
123X5 X7
1234
NO NC S1 S2
COM
Alarm contact
12
1212 SELV
class 2 area
N
L/ LN/ PE PE

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11
CLICK

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12
13
14
MAX CA CB : ON

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3. INSTALLATION NOTES
3.1. Use of the Manual
This manual covers the installation and operation of the nVent RAYCHEM
HWAT-ECO-GF controller and must be used with the following additional
documents: HWAT System Product and Selection Design Guide (H)
HWAT System Installation and
Operation Manual (H).
IMPORTANT: For the nVent warranty and agency approvals to apply,
the instructions included in this manual and product packages must
be followed.
WARNINGS: For over voltage protection (e.g. in case of thunderstorm)
we recommend the use of an external over voltage protection device.
Per ASHRAE Guideline -, maintaining hot water temperatures
consistently above °F (°C) between the water heater and fixtures
has been used successfully as a Legionella control method.
Care and maintenance
Clean the HWAT-ECO-GF with a soft damp cloth only, do not use any
solvents. Do not pour water directly on the device. Do not use a water
hose or a high pressure cleaner.
Pre-Installation testing
Prior to installing the HWAT-ECO-GF controller, perform the insulation
resistance (Megger) test and circuit length verification (Capacitance)
test on the heating cable as detailed in the HWAT System Installation and
Operation Manual (H).
Installing the controller
Install the controller in an indoor, dry, clean, accessible location. If using
the optional pipe temperature sensor, make sure you install the controller
within  ft ( m) of where you want to monitor the pipe temperature.
The control unit can operate also without installed Boiler or Pipe sensor.
Opening the controller
WARNING: To prevent shock, always switch off the power supply
(circuit breaker) before opening the controller.
The HWAT-ECO-GF has a removable front cover. Both the cover and the
box have electronic parts and are connected to each other by an Ethernet
cable. First unscrew the four screws in the cover.
3.2. Description
The HWAT-ECO-GF control unit has been developed for operation with the
self-regulating heating cables: nVent RAYCHEM HWAT-Ror HWAT-P.
The nVent RAYCHEM Hot Water Temperature Maintenance (HWAT)
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-GF control unit combines the following features:
• The operating temperature of the heating cable 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 heating cable will automatically be lowered in case the boiler
temperature is reduced, preventing the heating cable from using too
much energy for heating the water in the pipes.
• On larger and more complex domestic hot water systems, the HWAT-
ECO-GF controller can be delivered in different prefabricated panels,
depending on the quantity of heating circuits (, or ).
• An alarm terminal makes remote reading of errors possible.

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• A pipe sensor (to be ordered separately) can be installed as reference
point to track and monitor pipe temperature in a large hot water
distribution networks.
• The unit can be pre-programmed in power-off mode by external
power bank (to be ordered separately) connected via A-A-USB cable
and USB connection.
• Built-in ground fault protection
3.3. Technical Data
Product specification Only for HWAT-R2and HWAT-P1heating cables
Electrical properties
Supply voltage HWAT-R2: 208/240/277 VAC, 60 Hz
HWAT-P1: 120 VAC, 60 Hz
Output relay switching
capacity (heating cable) 24A @ 120/208/240/277 VAC, 60Hz
Power supply terminals 3x Push-in Cage Clamp 18-10 AWG/0.75-6mm2
Heating cable terminals 3x Push-in Cage Clamp 18-10 AWG/0.75-6mm2
Alarm terminals 3x Push-in Cage Clamp 18-10 AWG/0.75-6mm2
Sensor terminal - Boiler 2x Push-in Cage Clamp 22-16 AWG/0.32-1.5mm2
Sensor terminal - Pipe 2x Push-in Cage Clamp 22-16 AWG/0.32-1.5mm2
Alarm relay Single pole double throw relay, volt-free,
rating 1A/24 VAC or 24 VDC
Circuit breaker Max. C30A - 30 mA ground-fault protection is built
into the HWAT-ECO-GF
Real time clock Automatic daylight savings time time and
Leap year correction
Clock backup 10 days
Clock accuracy A variation of ± 10 minutes per year is possible
Settings All settings are stored in non-volatile memory
Ambient exposure
temperature 32°F (0°C) to 104°F (40°C)
Maintain temperature
setpoint 99°F (37°C) to 149°F (65°C)
Pre-programs
7built-in building specific programs, can be
edited, in 24 time blocks; of the following program
settings: Off, Economy, Maintain and Heat-Up cycle
Enclosure
Material Polycarbonate
Dimensions 210 mm x 90 mm x 85 mm / 8.26"x 3.5" x 3.34"
Ingress protection class TYPE 12 – indoor use only
Weight 1050g/2.3lbs
Mounting DIN-Rail mountable 35 mm
Entries
Two each 1in conduit entries
Cable gland 3-hole grommet; Maximum cable
size -2wire: 20 AWG (0,5mm2)
Storage temperature –4°F (–20°C) to 105°F (40°C)
Sensor
Temperature sensor type Standard Thermistor NTC 2,0KOHM at 77°F (25°C),
2wires
Sensor tip dimensions Ø 0.2" (5mm) ; length 0.8"(20 mm)
Sensor cable length 10ft (3m) cable extension up to 328 ft (100m) /
2x 16 AWG
Sensor temperature range 32°F (0°C) to 194°F (90°C)

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104 °F 
113 °F 
122 °F 
131 °F 
140 °F 
149 °F 
Approval
Approval/
Electromagnetic
c-UL-us, ROHS, WEEE
Electromagnetic Compatibility (EMC)
Preset key lock pass code 3000
4. OPERATION
The HWAT-ECO-GF has a resistive touchscreen user interface:
The unit will go in dim mode after  minutes with no interaction.
The unit will switch to the main screen after minute of no interaction
on the parameter input screens.
4.1Quick 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 Quick start helps to set all
important settings, the unit will go in main screen mode automatically
when done. Quick start is sufficient for normal operations. More settings
are available in the Setup menu for special installation conditions.
4.2. Program Start
Quick
start
Language
selection
Select your language from the language menu.
Connection
check
The unit is automatically executing a
connection check. It will check the heating
cable connection, boiler sensor and pipe sensor
connection. A connection of the unit to an
external contactor needs to be confirmed by
the user. Boiler sensor and pipe sensor are
optional connections. If connected, they will
automatically switch on. Fine-tune the sensor
inputs in the parameter settings.The unit also
operates in mode without sensors.
Country
selection
Select a country in this menu. Your selection will
define the default values for time format.
Select
voltage
Select the voltage used.
Date input Use the up/down arrow keys to select the year.
Time input Use the up/down arrow keys to set
the hour and minute.
Select
saving
time
Choose ON/OFF to activate/deactivate the
saving time function.
Building
type
program
The HWAT-ECO-GF has 7default timer
programs. Select a program by tapping on the
corresponding box (box will turn red).
Select
cable type
Select the installed HWAT heating cable.

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Plumbing
settings
Default values are set for selected plumbing set
values. Change the default values by clicking on
the arrow sign for each value and enter a new
value.
Heating cable selection
Select the type of cable used in your
installation.
Pipe diameter
Selection range 1/2" (DN 15) up to 5" (DN 100)
if HWAT-R2is used. Selection range 1/2" (DN15)
up to 2" (DN 50) for HWAT-P1heating cable.
Ambient temperature
The ambient temperature is the temperature
inside the room where the heating cable is
installed. Use the +/- keys to select a
temperature from 50°F ( 10°C) to 77°F (25°C).
Clicking on the “back” icon will store the value
and show it in plumbing settings. Range: from
50°F (10°C) to 77°F (25°C).
Maintain temperature
The maintain temperature is the water
temperature that you set for normal use. The
minimum temperature is 98°F ( 37°C ) or the
economy temperature, whichever is higher.
The maximum temperature depends on cable
type, pipe thickness, insulation thickness and
ambient temperature.
WARNING: Per ASHRAE Guideline 12-2020,
Maintaining hot-water temperatures consistently
above 120°F (49°C) between the water heater
and fixtures has been used successfully as a
Legionella control method.
Economy temperature
The economy temperature is the water
temperature for periods in which the amount of
hot water used is low (at night) or high (peak
period).Select the temperature using the +/-
keys. The minimum temperature is 98°F (37°C)
for use in environments such as schools, and
106°F (41°C) in the Apartments program. The
maximum temperature is the selected maintain
temperature.
Test
program
start
The test program runs for 30 minutes, during
which all parameters will be ignored to check
heating cable and connection on site. You can
stop the test program at any time.

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Main Screen
NOW
HOT WATER MAINTENANCE
BOILER
ECONOMY TEMP
AT 05:00 p.m.
NEXT
INFO, RESET, SERVICE, TEST....
CABLE TYPE, PIPE DAIMETER,...
COUNTRY, LANGUAGES, UNITS,...
APPARTMENT, MAINTAIN, ECONOMY, ....
SETTING
SYSTEM
HEATING CABLE & PIPE
GENERAL SETTINGS
WATER TEMP. & PROGRAM
INFO
TEST PROGRAM
RESET
SERVICE
STATUS
SYSTEM
SELECT LANGUAGE
SELECT COUNTRY
SELECT DATE
SELECT TIME
SELECT ALARM
GENERAL SETTING
SELECT SAVING TIME
ENGLISH
UNITED STATES
01.10.2017
14 : 17
OFF
ON
14 : 17
14 : 17
14 : 17
14 : 17
02:14 p.m.
SELECT WATER TEMPERATURE
SELECT PROGRAM
PROGRAM TIMER
WATER TEMP. & PROGRAM
131°F/122°F
14 : 17
HOTEL
SELECT CABLE TYPE
SELECT PIPE DIAMETER
SELECT INSULATION THICKNESS
SELECT AMBIENT TEMPERATURE
SELECT BOILER SENSOR
SELECT BOILER CUT- OFF TEMPS.
HWAT-R2
DN 25
40 MM
20 °C
ON
35/85 °C
HEATING CABLE & PIPE
140 °F
131°F
131°F
grey area
white area
red area
Contains areas:
• Actual Maintain temperature (red area)
• Next event temperature (grey area)
• Hot water storage temperature
(white area- if boiler sensor is connected and active)
Additional icons for settings, relay (ON/OFF), key lock or warning will
be displayed.When Lock is “on” a password is needed to access the
parameter menus.
After the correct number password is entered, each parameter in the
setup can be changed. The unit locks again after a  min. time out (no
keys pressed).
SETTINGS
NOW
HOT WATER MAINTENANCE
BOILER
ECONOMY TEMP
AT 05:00 p.m.
NEXT
INFO, RESET, SERVICE, TEST....
CABLE TYPE, PIPE DAIMETER,...
COUNTRY, LANGUAGES, UNITS,...
APPARTMENT, MAINTAIN, ECONOMY, ....
SETTING
SYSTEM
HEATING CABLE & PIPE
GENERAL SETTINGS
WATER TEMP. & PROGRAM
INFO
TEST PROGRAM
RESET
SERVICE
STATUS
SYSTEM
SELECT LANGUAGE
SELECT COUNTRY
SELECT DATE
SELECT TIME
SELECT ALARM
GENERAL SETTING
SELECT SAVING TIME
ENGLISH
UNITED STATES
01.10.2017
14 : 17
OFF
ON
14 : 17
14 : 17
14 : 17
14 : 17
02:14 p.m.
SELECT WATER TEMPERATURE
SELECT PROGRAM
PROGRAM TIMER
WATER TEMP. & PROGRAM
131°F/122°F
14 : 17
HOTEL
SELECT CABLE TYPE
SELECT PIPE DIAMETER
SELECT INSULATION THICKNESS
SELECT AMBIENT TEMPERATURE
SELECT BOILER SENSOR
SELECT BOILER CUT- OFF TEMPS.
HWAT-R2
DN 25
40 MM
20 °C
ON
35/85 °C
HEATING CABLE & PIPE
140 °F
131°F
131°F
SYSTEM
NOW
HOT WATER MAINTENANCE
BOILER
ECONOMY TEMP
AT 05:00 p.m.
NEXT
INFO, RESET, SERVICE, TEST....
CABLE TYPE, PIPE DAIMETER,...
COUNTRY, LANGUAGES, UNITS,...
APPARTMENT, MAINTAIN, ECONOMY, ....
SETTING
SYSTEM
HEATING CABLE & PIPE
GENERAL SETTINGS
WATER TEMP. & PROGRAM
INFO
TEST PROGRAM
RESET
SERVICE
STATUS
SYSTEM
KEYLOCK FEATURE
SELECT LANGUAGE
SELECT COUNTRY
SELECT DATE
SELECT TIME
SELECT ALARM
GENERAL SETTING
SELECT SAVING TIME
ENGLISH
UNITED STATES
01.10.2017
14 : 17
OFF
ON
14 : 17
14 : 17
14 : 17
14 : 17
02:14 p.m.
SELECT WATER TEMPERATURE
SELECT PROGRAM
PROGRAM TIMER
WATER TEMP. & PROGRAM
131°F/122°F
14 : 17
HOTEL
SELECT CABLE TYPE
SELECT PIPE DIAMETER
SELECT INSULATION THICKNESS
SELECT AMBIENT TEMPERATURE
SELECT BOILER SENSOR
SELECT BOILER CUT- OFF TEMPS.
HWAT-R2
DN 25
40 MM
20 °C
ON
35/85 °C
HEATING CABLE & PIPE
140 °F
131°F
131°F
Info General info about the unit, name, commissioning date,
firmware version, nVent contact info per country.
Test
program
The test program runs for 30 minutes, during which
all parameters will be ignored to check the heating
cable and the connection on site. You can stop the test
program at any time.
Reset Select “Yes” to activate the Quick install menu and return
all settings to factory settings.
Quick start process restarts automatically.
Service Access for nVent SERVICE TEAM