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Viega Hydronic Mixing Block User Guide
UG-HC 566234 0720 Hydronic Mixing Block
$ $ 3 8
/5$ "#
1
2
$
3
/
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Terminal 1 & 2
120 V AC
Power Supply
Class II
Transformer
Three Wire Thermostat
Wiring schematic for part number 18050:
1
Connect R from the transformer to the R
terminal on the thermostat.
2
Connect C from the transformer to C terminal
on the thermostat.
3
Connect W terminal on the thermostat to
terminal 1 on the Hydronic Mixing Block.
4
Connect C terminal on the thermostat to
terminal 2 on the Hydronic Mixing Block.
Legend: Thermostat
Low Voltage
Line Voltage