TH404
Wiring
2-wire installation
4-wire installation
Connect either one of the
Power supply
thermostat wires to the
heater wire and the other
one to the power supply
wire using solderless con-
nectors for copper wires.
NOTE: Special CO/ALR sol-
derless connectors must
be used when connecting
with aluminum conduc-
tors.
Power supply
5