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HVAC_BAC_ELECTRIC_IOM_RevCa_0219
INSTALLATION ON-OFF CONTROL
1. Disengage the 24 VAC building power circuit before wiring. Verify that the battery inside the VMS-35 has its wires disconnected
and leave them that way. Disconnect them if they are connected.
2. Connect the VMS-35 to the actuators as shown. The VMS-35 can power one or two actuators.
Actuator A: Connect terminal AC to red wire from actuator to provide power. Connect grounded reference – negative/black wire
from actuator to terminal LN. Connect terminal AC to white wire from actuator to drive the valve stem to the rotation switch position.
Disconnect terminal AC from white wire from actuator to drive the valve stem to the opposite position.
Actuator B: Connect terminal AC to red wire from actuator to provide power. Connect grounded reference – negative/black wire
from actuator to terminal LN. Connect terminal AC to white wire from actuator to drive the valve stem to the rotation switch position.
Disconnect terminal AC from white wire from actuator to drive the valve stem to the opposite position.
3. While still disconnected, wire the VMS-35 to 24 volts AC power. Connect the hot to terminal L then then neutral to terminal LN.
4. Engage the 24 VAC building power.
5. Verify that building power is live then connect the loose red wire inside the VMS-35 enclosure to the positive (+) battery terminal
and the black wire to the negative (-) battery terminal.
NOTE:
Engage the 24 VAC power to the VMS-35 before connecting the battery. Connecting the battery first causes the VMS-35 to
go into the power failure mode. If there are conditions other than power failure during which the actuator should be driven to the
rotation switch position, replace the jumper between LN & RC with a contact that opens on demand.
ADDENDUM B
Summary of Contents for E024
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