OJ Electronics ETO2 Manual page 107

Type ETO2
Fig. 9 Advanced 2-stage electric heating control
(Y/Δ)
1-zone hydronic heating control for controling the supply water temp. with mixing valve
Fig. 11
Hot water Optional
Main Pump
Fig. 10
3 way Circulation
valve Pump
© 2014 OJ Electronics A/S
Advanced 2-stage connection (Y/Δ)
BR978A04a
© 2010 OJ Electronics A/S
Optional
air sensor
Supply sensor
ETF-522
Ground sensor
Return sensor
ETF-522
107