Installation Notes; Care And Maintenance; Technical Data - nVent RAYCHEM HWAT ECO Mode D'emploi

3. INSTALLATION NOTES

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:
Maximum circuit length at 230 VAC and for 20°C start-up temperature
C-characteristic circuit breaker
Multiple units on multiple power points can be used if longer heating cables are
required. we recommend to use nVent raycHEM Hwat-sBs panels to operate 3, 6, 9
or 12 heating circuit
Fig. 1
circuit breaker
C 10A
C 13A
C 16A
C 20A
the nVent raycHEM Hwat-Eco has a removable top lid. Both top and bottom of the box
have electronic parts and are connected to each other by an Ethernet connector cable.
the unit is delivered with top lid and back part dismantled.
Warning:
For over voltage protection (e.g. in case of thunderstorm) we recommend
the use of an external over voltage protection device.

Care and maintenance

clean the Hwat-Eco 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.
3.1. Description
the Hwat-Eco control unit has been developed for operation with the
self-regulating heating cables: nVent raycHEM 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 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 big warm water systems it is sufficient to programme one Hwat-Eco unit
in a rAyCHEm sbs panel to manage multiple heating circuits. The HWAT-ECO
controller can be delivered in different prefabricated panels, depending on the
quantity of heating circuits (3, 6, 9).
• an alarm terminal makes remote reading of errors possible.
• 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 network.
• 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.

3.2. Technical data

Product specification
supply voltage
power consumption
power output relay
(heating cable)
power supply terminals
Heating cable terminals
Alarm terminals
sensor terminal - boiler
HWAT-L
(Yellow)
80 m
110 m
140 m
180 m
Hwat-r/-M/-l heating cables only
Electrical properties
230 Vac -15 /+10%; 50 Hz
2,5 VA max
20 A / 230 VAC
3 x 6 mm² max
3 x 6 mm² max
3 x 1,5 mm² max
2 x 1,5 mm² max
HWAT-M
(Orange)
50 m
65 m
80 m
100 m
HWAT-R
(Red)
50 m
65 m
80 m
100 m
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