A.O. Smith DSE-5 Service Handbook page 24

Three Phase Y Configuration - 3 Pole Contactor
The illustrations below show how three wire (Y configured) heating elements (page 17) are
wired to 3 pole contactors on water heaters connected to a three phase power supply. See
the "Contactors" section of this manual - pages 34 - 38.
Connection Diagram
Heating Element Flange - End View
Two ends
Two ends
of loop 1 of loop 2
OPERATION & SERVICE
Three phase (3Ø)
Two ends
of loop 3
Servicing should only be performed by a Qualified Service Agent
Wiring Diagram
power supply
Metal bar that joins
or splices together
one end of each loop.
Three loops
of one heating element
Metal bar that joins
or splices together
one end of each loop.
22
3 Pole
Contactor
Wiring leads from
heating element