Steffes 9180 - Manual (Page 10)

control circuit SteP-DoWn tranSforMer
The internal controls and motors of all ThermElect systems operate at 240 volts (two wire). In systems with
277/480 or 347/600 volt element circuits, a transformer must be installed per the installation instructions to sup-
ply this voltage to the system’s controls. This transformer can be purchased as an optional device from Steffes
Corporation or sourced from your local electrical supply outlet. See the matrix below for proper sizing. load as
dictated by the furnace’s set-up. With a Bacnet, the furnace can be commanded to varying input levels remotely.
a
ccessories
o
pTional
a
cceSSorieS
 2.03 T
herm
e
lecT
h
ydronic
Model Primary
Voltage
Secondary
Voltage KVa Hevi duty Item #
Steffes
Item #
277/480V 480 240 2 HS1F1BS or equal 1017082
347/600V 600 240 2 HS10F2AS or equal 1017080