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RCU61U Room Temperature Controller
For CAV Systems
Minimum Limitation of
Cooling Signal,
Continued
Setpoint Shifting
Setpoint Limit Stops
Siemens Industry, Inc.
Signal Inputs (Terminals 1 and 2) are used for outside temperature compensation.
Using a 0 to 10 Vdc signal, the setpoint can be shifted by ±22.5°F at 72°F. The neutral
position is at 5 Vdc and means no setpoint shift.
The room temperature setpoint can be limited in increments of 2°F (1°C) by using the
minimum and maximum setpoint limit stops. This prevents arbitrary setpoint
readjustments.
To set limit stops, remove the setpoint knob by pulling it straight off the shaft.
Reposition gray tabs for high and low stops in the holes around the perimeter of knob
as required. See Figure 4.
Figure 2. Potentiometer Location.
Figure 3. Setpoint Shifting.
Figure 4. Setpoint Limit Stops.
Technical Instructions
Document Number 155-328P25
October 6, 2016
W
Original setpoint
W1 New setpoint at 10V input
W2 New setpoint at 0V input
(V) Input voltage
Page 3
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