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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 10 A
C 13 A
C 16 A
C 20 A
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-regulatinga 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.
•
On big warm water systems it is sufficient to programme one
HWAT-ECO unit in a nVent 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 but the unit can operate without need to install
any sensor (boiler or pipe).
•
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.
HWAT-L
(Yellow)
80 m
110 m
140 m
180 m
HWAT-M
(Orange)
50 m
65 m
80 m
100 m
nVent.com/RAYCHEM
HWAT-R
(Red)
50 m
65 m
80 m
100 m
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