16
NG-IOM-ATT Release 1.2
July 12, 2019
DC control power for the CoolLinks™ board in the DX unit can be sourced from the controller from any one of the four
48VDC terminal blocks. Ensure that the slider switch (1) is in the left position (green power LED (3) off). On the two-
position terminal block (2) c48VDC to the R terminal (5) and RTN to the C terminal (6) on CoolLinks board. Turn
the slider switch (1) to the right. Verify that the green power LED in the controller (3) and on the CoolLinks™ board (7)
are both On. If both power LEDs are off, turn the breaker off then test and replace the 2A fuse if necessary.
Figure 13: CoolLinks™ HVAC Unit Power Connections
4.6 Smoke Detector, Hydrogen Detector, Generator Running
Smoke Detector:
Figure 14: Wiring Connections With or Without Smoke Detector
2
3
1
4
5
6
7
