Honeywell ECS Series Installation And Operation Manual page 66

ECS Device Installation 151455
1. Connect the black wire of the battery harness to the (-) side of the battery #2.
2. Connect the jumper wire provided form the positive (+) side of battery #2 to the negative side of
battery #1.
3. Connect the red wire from the battery harness to the positive (+) side of battery #1.
Figure 4-55 Battery Connection to ECS-125W
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