Chapter 2 BCU Mounting and Power Wiring
24 BMTW-SVN01F-EN
5. Secure the back panel to the wall with the 1/4 in. (M6) hardware.
Install the Optional Operator Display
If you purchased the optional BCU operator display, refer to “Installing
the Optional Operator Display” on page 33, then proceed to “BCU Power
Wiring for European Community Installations” on page 24.
BCU Power Wiring for European Community
Installations
The BCU power wiring procedure consists of verifying compliance with
the BCU circuit requirements and then connecting the ac-power wires.
(See also “Preliminary AC-Power Checkout” on page 30.)
Verify Compliance with Circuit Requirements
To make sure that the BCU will operate properly, verify that the power
supply circuit is in compliance with these circuit requirements:
• The BCU must receive power from a dedicated power circuit. Failure
to comply may cause control malfunctions.
• The BCU must be protected by an 8–10 A circuit breaker. Locate the
breaker near the BCU, since it is the BCU disconnect switch.
• The ac-power wire conduits or wire bundles must not contain
input/output wires. Failure to comply may cause the BCU to malfunc-
tion due to electrical noise.
• The ac-power wiring must comply with applicable national and local
electrical codes.
• The ac-power wiring requires three-wire 230 Vac service. Use solid,
1.63 mm
2
, copper conductors only. Do not use stranded wire.
CAUTION
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of conductors.
Failure to use copper conductors may result in equipment damage.
Note:
The BCU transformer voltage utilization range is 196–264 Vac
(230 Vac, nominal). The panel determines if the current is 50 or
60 cycle.
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