OJ Electronics ETO2 Instructions page 5

Type ETO2
Gutter sensor - ETOR, figs 2+4:
For installation in a gutter or downpipe on the
sunny side of the building. It is important to
ensure that the sensor contact elements face
against the flow of melt water. If necessary, two
sensors can be installed in parallel. Detailed
installation instructions are supplied with the
sensor.
Note that the pink and grey wires are not
used.
Outdoor sensor - ETF-744/99, figs 2+4:
Although ETF is designed for use with gutter
sensor ETOR, it can also be used separately for
the detection of temperature alone. The sensor
should be mounted on the wall beneath the
eaves on the north side of the building.
Water pipe sensor - ETF-522:
Is only used with hydronic heating systems to
detect the temperature of the supply and return
water. Must be fastened to the pipe directly with
strips.
Sensor cables:
With the exception of ETOG-56, which has a 25
m cable, ETOG and ETOR sensors are supplied
with a 10 m cable, which can be extended up to
approx. 200 m using standard installation cable:
6x1.5 mm² for ETOG and 4x1.5 mm² for ETOR.
The ETF cable can be extended up to approx.
50 m in length. Sensor cables must be installed
in accordance with current regulations. They
must never be installed parallel to power cables
as electrical interference may distort the sensor
signal.
ETO2:
The unit is intended to be DIN-rail mounted in an
approved panel.
Wall mounting:
The accompanying plastic cover can be used for
wall mounting in an indoor area.
Connect supply voltage to terminals N and L. All
electrical and mechanical installation must be
performed in accordance with applicable local
regulations.
SETUP, ELECTRIC HEATING
• 1-zone electric heating control with ETOG
(figs 3+6):
Connect 1 or 2 ETOG sensors to terminals
11-20.
Connect heating cable to potential-free output
relays 1, 2 and 3 according to fig. 8.
• 1-zone electric heating control with ETOR +
ETF (figs 4+7):
Connect 1 or 2 ETOR sensors to terminals
11-20.
Note that the pink and grey wires are not used.
Connect 1 ETF sensor to terminals 31-32.
Connect heating cable to potential-free output
relays 1, 2 and 3 according to fig. 8.
• 2-zone electric heating control with ETOG
(figs 3+6):
Connect 2 ETOG sensors to terminals 11-20.
Connect heating cable for zone 1 to potential-
free output relay 1 according to fig. 8.
Connect heating cable for zone 2 to potential-
free output relay 2 according to fig. 8.
• 2-zone electric heating control with ETOR
(figs 4+7):
Connect 2 ETOR sensors to terminals 11-20.
Note that the pink and grey wires are not used.
Connect heating cable for zone 1 to potential-
free output relay 1 according to fig. 8.
Connect heating cable for zone 2 to potential-
free output relay 2 according to fig. 8.
• 2-zone electric heating control with ETOG
and ETOR (figs 5+6+7):
Connect 1 ETOG sensor to terminals 11-16 as
sensor 1.
Connect 1 ETOR sensor to terminals 17-20 as
sensor 2.
Note that the pink and grey wires are not used.
Connect heating cable for zone 1 (ground) to
potential-free output relay 1 according to fig. 8.
Connect heating cable for zone 2 (roof) to
potential-free output relay 2 according to fig. 8.
© 2020 OJ Electronics A/S
English / Instruction
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