BCU Mounting and Power Wiring for North American Installations
BMTW-SVN01F-EN 19
Secure the BCU to the Wall
After the installing contractor runs ac-power wiring, input wiring, and
communications wiring to the selected location, secure the BCU to the
wall:
1. Unpack the BCU shipping carton. The keys for the BCU are inside
the resin cover.
2. To avoid damage to the BCU logic board and resin front cover, store
them at another location during building construction.
3. On the wall, mark the location of the four mounting holes in the BCU
back panel.
4. Set the back panel aside and drill the mounting holes.
5. Secure the back panel to the wall with the
¼ 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 North American Installations” below.
BCU Power Wiring for North American 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 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 the National Electrical Code
(NEC) and applicable local electrical codes.
• The ac-power wiring requires three-wire 120 Vac service.
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 98–132 Vac
(120 Vac, nominal). The panel determines whether the current
is 50 or 60 cycle.
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