OJ ETO2 Mode D'emploi page 6

English / Instruction
• 1-zone electric heating control with output
control (y/∆) (figs 6+9+10):
Advanced 2-stage control with ETOG. 1/3
power on heating cables in afterrun.
Connect 1 or 2 ETOG sensors to terminals
11-20.
Connect external contactor/relays to potential-
free output relays 1, 2 and 3 according to fig. 10.
sETuP, hydrOnIC hEaTInG
• 1-zone hydronic heating control for
controling the supply water temp. with
mixing valve (figs 6+11+13+16):
Connect 1 or 2 ETOG sensors to terminals
11-20 (fig. 6).
Connect supply voltage (24 V AC) for mixing
valve to terminals 25-26 (fig. 13).
Connect mixing valve to terminals 21-24 (fig. 13).
Connect ETF-522 supply and return sensors to
terminals 27-30 (fig. 16).
Connect primary pump to potential-free output
relay 1 according to fig. 14.
Connect secondary pump to potential-free
output relay 2 according to fig. 14.
• 1- or 2-zone hydronic heating control, simple
(figs 3+6+12):
Connect 1 or 2 ETOG sensors to terminals
11-20 (fig. 6).
Connect circulation pump for zone 1 to
potential-free output relay 1 according to fig. 14.
If zone 2 is used, connect circulation pump for
zone 2 to potential-free output relay 2 according
to fig. 14.
Same application setup as for 1- or 2-zone
electric heating control, see User Manual,
Startup.
rEMOTE COnTrOl (fig. 15):
The forced heat and standby functions can be
remotely controlled by wiring ETO2 to external
buttons/relays (normally open).
Connect external standby button to terminals
33-34.
Connect external forced heat button to
terminals 35-36.
6
TEsTInG snOw MElTInG sysTEM
After completing installation and application
setup, it is recommended that the snow melting
system is tested.
1. Adjust SET TEMP in the setup menu to max.
temperature.
2. Pour some water onto the sensor (ETOG/
ETOR).
3. The output relay for the heating cable in the
zone concerned should activate and ON
should be indicated on the ETO2 display.
Check that the heating cable becomes warm,
check the voltage if possible.
4. After testing, adjust SET TEMP back to the
desired setting (factory setting = +3.0°C /
37.4°F).
© 2014 OJ Electronics A/S
Type ETO2