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® 2018 Valco Companies, Inc.
Be sure that ALL POWER IS DISCONNECTED
BEFORE INSTALLING or Servicing the control.
Powering the control
1. Locate the power supply at the top right corner inside
the base of the enclosure
as shown below
.
Power Supply Location
Power Supply Relays
It is beneficial to install an isolating switch to allow the power supply to be switched off during
installation and service. The isolating switch must be bipolar.
L
120 VAC Connections 240 VAC Connections
Hot L Hot L
Neutral N Hot N
Ground G Ground G
N
• To ensure the Ventra Pro
TM
alarms on loss of power in either leg of 220V at your electrical
service panel, we recommend wiring the control for 220V when it is available.
• A main power disconnect must be provided by the installer to allow the controller to be shut off.
• The maximum torque for the power input terminals is 8 inch-pounds.
• Use 18 to 14 gauge wire.
Do not tap power from the power supply for other devices. The extra power draw may cause the
controller to malfunction.
N
L
Ground
Neutral - spelled out on actual input board
Line - spelled out on actual input board