Models S 1200, S 2400, S 4400, POU 3300, POU 3500
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20
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4.2.
Basic Module Operation
Changing the Setpoint
The CHANGE SETPOINT key is used to change the system’s temperature set point while in Local
control. Pressing this key brings up the following display.
The top line is the prompt with a blinking question mark; the second line is the current local set
point. Press the YES key to make a change. The blinking question mark changes to an equal sign.
Use the YES (Up) and NO (Down) keys to reach the required set point. Press the ENTER key to
save the new value.
4.3.
Lockout Tagout Procedure
In order to remove the unit, the unit must be detached from the facility connections (water,
electricity, and CDA).
1.
Identify the connections to CDA, Facility water, and electrical connectors to the PSCX.
a.
CDA is connected to the port on the top of the unit. Follow this tube to the valve
monitoring the CDA pressure.
b.
Facility water connections are on the bottom of the unit. Trace these tubes back
to their flow meter and valves.
c.
Electrical connections are on the front of the unit.
2.
Make sure that the PSCX module is off, then disconnect the power and signal connectors
on the front of the unit.
3.
Shut off the water and air valves, and lock the valves in the off position.
4.
Verify that water is shut off from the PCW flow meters, and that no pressure is built up in
either line.
SET POINT?
24
o
C
SET POINT=
24
o
C
