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3. INSTALLATION NOTES
The installation and, if necessary, the maintenance and
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 Raychem HWAT-SBS panels
to operate 3, 6, 9 or 12 heating circuits.
Fig. 1 HWAT-L HWAT-M HWAT-R
Circuit breaker (Yellow) (Orange) (Red)
C 10A 80 m 50 m 50 m
C 13A 110 m 65 m 65 m
C 16A 140 m 80 m 80 m
C 20A 180 m 100 m 100 m
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 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: 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.
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.