If you can provide a photo of your Delcos 3100 unit’s terminal labels or the machine type it’s from (e.g., “Delcos 3100 on a 1998 Komori press”), I can refine this content into a specific, actionable wiring diagram.
When working with any Delcos 3100 wiring diagram, observe these rules:
If you cannot find the original, you can reconstruct it. Here is a safe method:
Tools needed: Notebook, multimeter with continuity test, colored markers, and a digital camera.
Procedure:
Your hand-drawn Delcos 3100 wiring diagram—no matter how rough—is better than none. Scan it and keep a digital backup.
As Delcos (likely a brand absorbed by a larger automation company like GE Fanuc or Cutler-Hammer) is no longer in active production, official sources are limited. Try these methods:
Before wiring, verify your specific model. The "3100" typically refers to a series. Common OEM numbers include:
Note: Always confirm the voltage rating. Most are 24VAC, but some commercial variants may use 120VAC inputs. delcos 3100 wiring diagram
When looking at the schematic for a Delcos 3100, you will see a repetition of specific components. Identifying these is the first step in reading the diagram.
The wiring diagram can be visualized by following the flow of electricity from the key switch.
The "Run" Circuit (Ignition On):
The "Start" Circuit (Key Turn):
The "Charge" Circuit:
The Delcos 3100 uses standard blade terminals (1/4" quick-connects). Here is the standard breakdown:
| Terminal | Function | Typical Wire Color | Description | | :--- | :--- | :--- | :--- | | 24V (R) | 24VAC Hot | Red | Power from transformer secondary. | | 24V COM (C) | 24VAC Common | White/Black | Transformer common/neutral. | | TH (W) | Thermostat Heat Call | White | 24V from thermostat when calling for heat. | | MV | Main Valve | Yellow/Blue | 24V output to gas valve main operator. | | MV/PV | Common for Gas Valve | White/Brown | Common return for both main and pilot valves. | | PV | Pilot Valve | Green/Orange | 24V output to pilot solenoid (spark ignition models). | | IGN | Spark Output | Orange (Heavy) | High voltage (~15kV) to spark rod. | | SENSE | Flame Sense | Black/White | Microamp DC signal from flame rod. | | IND | Inducer Motor | Brown | 120VAC output (or 24VAC depending on model) to draft inducer. | | LIMIT | Limit Switch Input | Red/White | Series loop through high-limit & rollouts. | | GND | Chassis Ground | Green | Earth ground for spark and safety. |
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