Johnson Controls CVM03050, Installation Manual

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Figure 7: 24 VAC supply power terminal block wiring
Table 4: Supply power terminal block wiring
Description
1 Supply power terminal block
2 Supply power terminal header
3
Wires from Johnson Controls 24 VAC, class 2 power
transformer
4 COM (Brown wire)
5 24 VAC (Orange wire)
Note: The supply power wire colors may be different
on transformers from other manufacturers. Refer to
the transformer manufacturer’s instructions and the
project installation drawings for wiring details.
Important: Connect 24 VAC supply power to
the CVM and all other network devices so that
transformer phasing is uniform across the network
devices. Powering network devices with uniform
24 VAC supply power phasing reduces noise,
interference, and ground loop problems. The CVM
does not require an earth ground connection.
However, when grounding the secondary of the 24
VAC transformer is required, only one connection
to ground must be made near the transformer. See
Figure 8.
Figure 8: Transformer grounding
CAUTION
Risk of Property Damage:
Do not apply power to the system before checking all
wiring connections. Improper wiring of this terminal
may cause a short circuit across the 24 VAC power
supply. A short circuit may result in a tripped circuit
breaker or blown fuse. If using a transformer with a
built-in fuse, the transformer may need to be replaced.
ATTENTION
Risque de dommages matériels:
Ne mettez pas l’appareil sous tension avant d’avoir
vérifié toutes les connexions du câblage. Le câblage
inadéquat de cette borne peut causer un court-
circuit sur l’alimentation électrique de 24 V c. Un
court-circuit peut causer le déclenchement du
disjoncteur ou le grillage d’un fusible. Si vous utilisez
un transformateur avec un fusible intégré, vous
pourriez devoir remplacer le transformateur.
To wire the CVM03050 controller, complete the following
steps:
1. Terminate wiring according to the appropriate figure
in Termination diagrams .
2. Wire network sensors and other devices to the SA
Bus.
3. Wire the FC Bus in a daisy chain.
4. Ensure that the CVM03050 is assigned a device
address. Set the device address using the rotary
switches at the top of the controller. See Setting the
device address .
5. Connect the CVM controller to 24 VAC, Class 2 power.
Note: If you are using the CVM03050 controller with
the Wireless Field Bus System, refer to the WNC1800/
ZFR182x Pro Series Wireless Field Bus System Bulletin
(LIT-12012320) or the ZFR1800 Series Wireless Field Bus
System Bulletin (LIT-12011336) .
Terminal wiring guidelines, functions,
ratings, and requirements
This section provides further guidelines on input and
output wiring, maximum cable length versus load current,
and SA Bus and supply power wiring.
For information about removing a terminal block from the
controller, see Removing a terminal block .
Input and Output wiring guidelines
Table 5 provides information and guidelines about the
functions, ratings, and requirements for the controller
input and output terminals, and Table 5 also references
M4-CVM VAV Box Controllers Installation Guide 6