King Electric DS-8 - Manual (Page 4)

Typical Load Wiring
The two load leads of the DS-8 do not supply power directly to your load. The relay inside the
DS-8, like a switch or thermostat, is used to switch a voltage of your choice. While not as convenient
as directly supplying power for the load this allows you to operate the DS-8 from one voltage while
controlling a load of a different voltage without adding an external relay or contactor. For example,
the DS-8 can be powered from 120VAC but can directly control a 24VAC signal for a boiler system or
240VAC for heating wire. The following diagrams show some possible wiring schemes for connecting
the DS-8 to your load. Your load may be a direct connection to a heater, a contactor, or a control
voltage. For clarity the safety GROUND leads are not shown.
NEUTRAL BUS BAR
20A
LINE/L1
NEU/L2
YELLOW
YELLOW
LOAD
DS−8
SWITCHED 120VAC
NEUTRAL
LOAD CENTER
120VAC In, 120VAC Load, Heat Cable or Similar (Strap DS-8 for 120VAC Power)
20
A
LINE/L1
NEU/L2
YELLOW
YELLOW
LOAD
DS−8
SWITCHED 240VAC
LOAD CENTER
LINE/L1
NEU/L2
YELLOW
YELLOW
LOAD
DS−8
LOAD CENTER
30A
NEUTRAL BUS BAR
15A
LINE/L1
NEU/L2
YELLOW
YELLOW
BOILER
DS−8
LOAD CENTER
15
A
These are just some of the possible wiring schemes that can be used to connect the DS-8 to your
load for control. The DS-8 should always be strapped for the voltage that is connected to Line/L1
and Neu/L2. Remember, these are only suggestions. You should always check with a qualified
electrician to insure conformance with local electrical codes!
240VAC In, Thermostat-Style for Boiler/Pump Control (Strap DS-8 for 240VAC Power)
120VAC In, 240VAC Load Separate Feed (Strap DS-8 for 120VAC Power)
240VAC In, 240VAC Load, Heat Cable or Similar (Strap DS-8 for 240VAC Power)
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