12
CONTROL PANEL INSTALLATION - WATERSIDE ECONOMIZER
Each Waterside Economizer is shipped with a pre-wired Water Temperature Control / Compressor Staging Panel.
The panel is complete with a pre-terminated wiring harness, for connection to the economizer plug on the
microprocessor control board of the water-cooled unit.
Installing Temperature Control Panel
1) The Temperature Control Panel fixture is intended for mounting on the wide condenser clamp rail, supplied
with the economizer kit (see photo below). Fasten the panel feet to the rail, using the provided self-drilling
screws.
2) Route the pre-terminated 4-wire harness towar
d
s the back of the main electrical panel. The harness wiring
should be kept away from hot gas piping, and the top of the compressor shell. Pass the wiring into the low
voltage section of the main electrical panel, through the thermostat wire entrance hole (see photo below).
3) On the microprocessor, locate the Economizer pin P5 and unplug the two Yellow/Red jumper wires Y1-OUT
and ECON and connect these leads to the corresponding colored Yellow/Red harness wires (see table
below). On pin P5, connect the G-OUT wire lead to corresponding colored harness wire Gray/Red. Using the
provided ¼” tab adapter, create a dual connection on the C-Common tab on the microprocessor board and
connect the White harness wire to this dual connection at C. See table below for connecting the harness
wires to the corresponding economizer plug connection leads and Common tab on the Microprocessor Board.
See wiring schematic for information on pin P5 and C (Common locations).
Single and Dual Compressor Units WSE Control Harness
Wire #
Color
Connection ID
WSE Temp/Staging Panel
Microprocessor Board
1
Yellow/Red
TB3-A1
ECON (P5)
2
Yellow/Red
TB3-A2
Y1-OUT (P5)
3
Gray/Red
TB3-A3
G-OUT (P5)
4
White
TB3-A5
C
4) Connect the spade terminals of the other end of the WSE harness to the correspond terminals on TB3 as
indicated in the above table. See wiring schematic for more information.
5) Secure the harness to the insulated condenser water piping, or compressor suction piping, in the condensing
section of the unit, using wire ties. Ensure that the harness is routed clear of hot surfaces, sharp edges, or
screw points.
6) Apply power to the unit, and observe for proper operation of the temperature control, and correct valve
actuator rotation (valve position is fully CCW for full mechanical cooling operation, fully CW for economizer
mode).
