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LMV Series
2‐1: Wiring Introduction
The LMV3 is a very flexible burner control. As such, there are many different ways to wire it. The
specific application will dictate the wiring required. This section details the most common applications.
The parameter settings outlined in Section 3 can enable, disable, or change the functionality of many
terminals on the LMV3. Thus, wiring and parameter settings work together to make the LMV3 an
extremely versatile BMS.
This section includes terminal descriptions (Sections 2‐2 and 2‐3) and extensive wiring diagrams (Section
2‐4) that detail the many applications of the LMV3.
Terminals
The connection terminals of the LMV3 are white RAST 5 and green RAST 3.5 connectors (plugs). Line
voltage plugs are keyed so they will only fit into one specific socket of the LMV3, eliminating the
possibility of inserting a plug into an incorrect socket.
Each plug is designed to connect one external device or a small group of external devices, such as gas
valves, to the LMV3. Each group of plugs on the front of the LMV3 provides line voltage, neutral, and
protective earth ground so an additional terminal strip is not necessary.
Note: All protective earth grounds (PE), neutrals (N), and lines (L) are common inside the LMV3.
X9‐
Plug Group
Figure 2‐1.1: Numbering Scheme on White Line Voltage (RAST 5) Terminals of the LMV3
Note: Dashes or dots can be used interchangeably between the numbers shown above.
Figure 2‐1.2: Numbering Scheme on Green Low Voltage (RAST 3.5) Terminals of the LMV3
Terminal descriptions (Sections 2‐2 and 2‐3) provide a map outlining exactly where the line and low
voltage plugs are located.
For each plug, Pin 1 is marked on the casing of the LMV3.
SCC Inc.
01.
Plug Number in Group
X62.
2
Plug Number
Pin Number
Page 1
Document No. LV3‐1000
04
Pin Number on Plug
Technical Instructions
Section 2
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