Wiring high-voltage ac power
BMTX-SVN01C-EN 21
Wiring high-voltage ac power
Verifying model number for local power requirements
Table 2 on page 10 lists the available BMTX BCU models. You can find
the model number on the shipping label or on the product label inside the
enclosure.
IMPORTANT
Make sure that you have the correct BMTX BCU model for local power
requirements.
To ensure proper operation of the BMTX BCU, install the power supply
circuit in accordance with the following guidelines:
• The BCU must receive power from a dedicated power circuit. Failure
to comply may cause control malfunctions.
• A disconnect switch for the dedicated power circuit must be near the
controller, within easy reach of the operator, and marked as the dis-
connecting device for the controller.
• High-voltage power-wire conduits or wire bundles must not contain
input/output wires. Failure to comply may cause the controller to mal-
function due to electrical noise.
• High-voltage power wiring must comply with the National Electrical
Code (NEC) and applicable local electrical codes.
• High-voltage wiring requires three-wire 120/230 Vac service (line,
neutral, ground).
To connect high-voltage power wires:
WARNING
Hazardous voltage!
Before making electrical connections, lock open the supply-power dis-
connect switch. Failure to do so may cause death or serious injury.
CAUTION
Use copper conductors only!
Unit terminals are designed to accept copper conductors only. Other
conductors may cause equipment damage.
Note:
The transformer voltage utilization range is 98–132 Vac
(120 Vac nominal) or 196–264 Vac (230 Vac nominal). The panel
automatically detects whether the current is 50 or 60 cycle.
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