Swiftech FS020 ALL MODELS - Manual (Page 10)

Swiftech Inc., 1703 E. 28
th
St., Signal Hill, CA 90755 T. (562) 595-8009 F. (562) 595-8769
Subject to change without notice - 10 -
Pump Relay switch operations
For normal operations, the L wire from the A/C socket is
connected to the N/O (normally open) position of the switch.
This means that when the computer is off, there is no current
from the power supply to the switch, and the relay is opened,
disallowing A/C to the pump. Conversely, as soon as you turn
the computer on, the switch becomes energized by the power
supply, and the relay closes, allowing A/C current to pass to
the pump.
For maintenance operations, if you want to turn the pump on
without operating the rest of the computer, you may
temporarily connect the L wire to the N\C (normally closed)
position. This is particularly useful for filling and bleeding the
circuit, as you wouldn’t want the computer running while the
cooling circuit is not completely operational. WARNING: do
not forget to reconnect to N\ O once you are ready to run
the computer: if you leave the L wire connected to N\C, the
pump will shut off as soon as the relay is energized by the
power supply.
E
N L
Ground +12v
Relay switch connection diagram
N\O +
A/C Socket
Pump
Computer
Power Supply
Relay switch
US Europe
Black Brown
White Blue
Green Yellow
WARNING! Always disconnect
from A/C power source while
working with electrical devices.
N\C
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