CAUTION
Risk of Property Damage.
Rotate the damper to the full-open position before
starting the air handler. Failure to rotate the damper to
the full-open position may result in damage to the VAV
box or ductwork when the air handler is started.
ATTENTION
Risque de dégâts matériels.
Faire pivoter le registre pour le placer en position
d'ouverture complète avant de démarrer l'unité de
traitement d'air. Le non-respect de cette directive
risque d'endommager le caisson de l'unité à volume
d'air variable (VAV) ou le réseau de conduites au
démarrage de l'unité de traitement d'air.
Wiring
Observe the following guidelines when wiring a CVM
controller:
CAUTION
Risk of Electric Shock.
Disconnect the power supply before making electrical
connections to avoid electric shock.
ATTENTION
Risque de décharge électrique.
Débrancher l'alimentation avant de réaliser tout
raccordement électrique afin d'éviter tout risque de
décharge électrique.
Important:
Do not connect supply power to the
controller before finishing wiring and checking all
wiring connections. Short circuits or improperly
connected wires can result in damage to the
controller and void any warranty.
Important:
Do not exceed the controller electrical
ratings. Exceeding controller electrical ratings can
result in permanent damage to the controller and
void any warranty.
Important:
Use copper conductors only. Make
all wiring in accordance with local, national, and
regional regulations.
Important:
Electrostatic discharge can damage
controller components. Use proper electrostatic
discharge precautions during installation, setup, and
servicing to avoid damaging the controller.
For detailed information about configuring and wiring
an MS/TP Bus, FC Bus, or SA Bus, refer to the
MS/TP
Communications Bus Technical Bulletin (LIT-12011034).
For
detailed information about wiring an N2 network, refer to
the
N2 Communications Bus Technical Bulletin (LIT-636018)
.
Terminal blocks and bus ports
See
for terminal block and bus port
locations on the CVM03050 controllers. Observe the
following guidelines when wiring a CVM controller.
Input and Output terminal blocks
CVM models have removable input and output terminal
blocks. The input terminals are located on the side of
the CVM near the FC and SA terminal blocks. The output
terminal blocks are located on the side of the controller
near the power supply. For information about removing a
information about I/O terminal functions, requirements,
and ratings, see Table 5.
FC bus terminal block (or N2 protocol as
required)
The FC Bus terminal block is a blue, removable, 4-pin
terminal block that fits into a board-mounted pin header.
When connecting the CVM to the FC Bus, wire the bus
terminal blocks on the controller and other FC Bus devices
in a daisy-chain configuration using 3-wire twisted,
shielded cable as shown in Figure 4. For more information
about FC Bus terminal functions, requirements, and
Figure 4: FC bus terminal block wiring
M4-CVM VAV Box Controllers Installation Guide
4
