Installation instructions Melting roof snow English Page 1/2 vers 1.0 110613
Installation instructions for melting roof snow
Read carefully through the entire installation instructions before you start laying.
The installation should be carried out by a qualified electrician.
General
The purpose of a snow melting unit is to maintain an open
channel for drainage of water, so that it does not freeze during
its passage down to a frost-free zone.
Max connection length at 10 A: 50 m
Max connection length at 13 A: 65 m
Max connection length at 16 A: 80 m
Max. self-supporting length: 30 m
Operating voltage: 230 V
Fuses must have C-characteristic
The installation must be protected by a 30 mA earth fault relay
The cable is marked by the metre
General laying
Lay the cable in one direction and connect directly into the
junction boxes for incoming power supply. A connection/
disconnection kit (E8960411) is needed for each length of
heating cable. Two connection/disconnection kits are required
for cable between 2 boxes.
NOTE!
Cut cable ends may not lie open during work. Seal
the ends temporarily to prevent water from entering the cable.
T-18 heating cable may not be laid directly on asphalt paper/
asphalt roofing. Contact Ebeco for alternative solutions.
Positioning of boxes and end connections
To ensure the installation has a long service life and
for the 10
year warranty to apply,
boxes and end connections must be
positioned so that they do not run the risk of water entering.
Boxes shall be positioned in a protected location, for example
under eaves or if possible inside the attic. Boxes fitted outdoors
must be filled with Ebeco Gel, art. no. E 0796802 (can be re-
moved). Pull the end parts up against the edge of the gutters.
See figs. 1 & 9.
Attaching the cable
Secure the heating cable into the gutter with adhesive
(E8960414). It is important to clean the gutter before gluing.
Glue the cable with a c/c distance of 1 m. Apply glue over the
cable as well so that the cable is properly secured.
Bifurcation to downpipes
Branch the cable in a box. Lay the cable so that the entire
gutter is heated. There should also be some slack in the cable.
See Fig. 2.
Mounting bracket
To protect the cable against mechanical damage where it goes
descends into the downpipe, it should be laid and secured over
a mounting bracket (E8960962) see Fig. 3. Maximum length
of hanging cable is 30 m. For longer lengths the cable must be
discharged using a discharge wire or similar.
Rainwater shoe
If the downpipe has a rainwater shoe, make the cable about
0.5 m longer than the downpipe. Fold this part back into the
pipe and secure it with a cable tie. See Fig 4.
Connection to surface water pipes
If the downpipe is connected to a surface water pipe the cable
must be buried at a sufficient distance under the ground so that
there is no risk of frost (approx. 1-1.5m) See Fig 5.
Internal downpipe or roof drain
For internal downpipes, roof drains or for bifurcations shorter
than 3 m, lay the cable in a loop instead of making a branch.
See Fig 6.
Box gutters
In gutters that are wider than 15 cm or in box gutters, lay the
cable in several turns. Maximum distance between the cables
is 12 cm. See Fig. 7.
Max/min thermostat
The location of the sensors is very important as they control
the installation. Position the max thermostat’s sensor where
there is no sun, for example, to the north or on a shady side.
It must not be affected by heat emissions from the building or
the heating cable. Position the min thermostat’s sensor where
you consider the highest temperature to be. Normal setting is
approx. +2°C on the max thermostat and approx. -6°C on the
min thermostat. The length of the sensor cable is 2.5 m and it
can be extended up to 50 m with 2x1,5mm² cable.
Temp/moisture control
The location of the sensors is very important as they control the
installation. Position the temperature sensor where there is no
sun, for example, to the north or on a shady side. It must not be
affected by heat emissions from the building or the heating ca-
ble. Position the moisture sensor (ice sensor) in the gutter where
there is the greatest risk of snow and water collecting. This is
usually at the gutter’s lowest point, facing south.
Clean the moisture sensor with methylated spirits before as-
sembling so that there is no grease or other deposits on the
metal rods. Glue the sensor together and install it in the gut-
ter so that the water is guided onto the detector via the ”fan”.
In wide gutters you should add runs of adhesive to guide the
water onto the sensor. See figs. 8 & 9.
The length of the sensor cables is 4 m and this can be ex-
tended to a maximum of 50m. The moisture sensor cable is
extended by 5x1,5 mm².
The temperature sensor is extended by 2x1,5 mm².
See also separate instructions in the temp/moisture-control unit.
Signs
Put heating cable signs (E8960963) beside boxes and downpipes.
Art nr 55250
