User's Manual

Installation
September 2013 4-30 P/N 81-CO2MAN-001
4-4.5 Main to Reserve Transfer Switch
The main to reserve transfer switch is used in the system to toggle the connection between the
electrical control heads installed on the main or reserved cylinders with a suppression control
unit. For electrical wiring with a single electrical control head, refer to Figure 4-23 and for two
electrical control heads, refer to Figure 4-24. The transfer switch is generally installed at the
cylinder bank.
Figure 4-23. Wiring Diagram with Single Solenoid (Main and Reserve)
Figure 4-24. Wiring Diagram with Dual Solenoid (Main and Reserve)
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RESERVE
MAIN
M/R TRANSFER
SWITCH
+
-
RELEASE
CIRCUITS
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+
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RESERVE
MAIN
RESERVE
MAIN
+
-
+
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M/R TRANSFER
SWITCH
RELEASE
CIRCUITS
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-
+
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