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Additional components
Current-sensing switches must be capable of switching 24 Vac for heat-
pump-compressor circuit applications (see "Compressor line-voltage mon-
itoring" on page 18). The current-sensing switch must sense line voltage
1
current as low as 2 A. This amperage is common for a
/
ton compressor,
2
which is typically the smallest compressor on a heat pump.
Output relays
Relays for fan (speed) control connected to the Tracer ZN511 binary out-
puts cannot exceed 12 VA (0.5 A) current draw at 24 Vac.
Valve and damper actuators
Actuators cannot exceed 12 VA draw at 24 Vac. Use actuators with on/off
action and spring return to normally open or closed position based on the
desired default position.
CNT-SVX06B-EN
5
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