Johnson Controls F4-CVM User manual
F4-CVM VAV Terminal Equipment
Controllers Installation Instructions
Application
The CVM03050 equipment controllers are designed for variable air volume (VAV) box applications.
CVM03050 controllers operate on an RS-485 BACnet® MS/TP bus as BACnet Advanced Application
Controllers (B-AACs) and integrate into Johnson Controls® and third-party BACnet systems.
CVM03050 controllers feature an integral damper actuator, a digital Differential Pressure
Transmitter (DPT) sensor, and a 32-bit microprocessor. The CVM03050-0P model features an
integral potentiometer to sense actual VAV box damper position. These controllers also include an
integral real-time clock, which enables the controllers to monitor and control schedules, calendars,
and trends, and operate for extended periods of time as stand-alone controllers when offline
from the Facility Explorer® system network. These controllers connect easily to the wired and
wireless network sensors for zone and discharge air temperature sensing. Their small package
size facilitates quick field installation and efficient use of space without compromising control
performance.
Figure 1: F4-CVM3050
Communications protocols
The CVM03050 controllers can communicate using BACnet MS/TP, N2, or wireless Zigbee®. By
default, the CVM controllers communicate using the BACnet MS/TP protocol. The BACnet protocol
is a standard for ANSI, ASHRAE, and the International Standards Organization (ISO) for building
controls.
Part No. 24-10143-01809 Rev. B
2019-05-17 (barcode for factory use only)
F4-CVM03050-0, F4-CVM03050-0P
*241014301809B*
The CVM controllers can be used as functional replacements for legacy N2 controllers. The N2-
capable MS/TP equipment controller models provide a cost-effective upgrade and modernization
path for customers with existing N2 controllers. For installation and commissioning support, and
tips for efficient and safe replacement, refer to the Modernization Guide for Legacy N2 Controllers
(LIT-12012005) and the controller-specific documentation. For information about mapping N2
Objects in controllers with switchable communications protocols, refer to the N2 Compatibility
Options chapter of the Controller Tool Help (LIT-12011147).
To configure CVM controllers to communicate using the N2 communications protocol, see
Configuring N2 communications.
The CVM controller can also be installed in a wireless application using anFX- ZFR/ZFR ProWireless
Field Bus Router. To configure these controllers to communicate using the wireless communications
protocol, see Configuring wireless communications.
North American Emissions Compliance
United States
This equipment has been tested and found to comply with the limits for a Class A digital device
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when this equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential area may cause harmful
interference, in which case the users will be required to correct the interference at their own
expense.
Canada
This Class (A) digital apparatus meets all the requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte toutes les exigences du Règlement sur le
matériel brouilleur du Canada.
Installation
Observe the following guidelines when installing a CVM controller:
• To minimize vibration and shock damage to the controller, transport the controller in the original
container.
• Verify that all parts shipped with the controller.
• Do not drop the controller or subject it to physical shock.
Parts included
• One CVM03050 controller with removable terminal blocks (Input/Output, Power, FC, and SA bus
are removable)
• One installation instructions sheet
F4-CVM VAV Terminal Equipment Controllers Installation Instructions2
• One self-drilling No. 10 x 25 mm (1 in.) screw
Materials and special tools needed
• Small, straight-blade screwdriver for securing wires in the terminal blocks
• 8 mm (5/16 in.) wrench or 10 mm (3/8 in.) 12-point socket to tighten the square coupler bolt
• Several shims or washers to mount the CVM
• Power screwdriver, 100 mm (4 in.) extension socket, punch, drill, and 3.5 mm (9/64 in.) drill bits to
mount the CVM
• Pliers to open and close the damper
• Required length of 3.97 mm (5/32 in.) ID pneumatic tubing and barbed fittings
Mounting
Observe the following guidelines when mounting a CVM controller:
• Ensure that the mounting surface can support the CVM and any user-supplied enclosure.
• Mount the CVM on a hard, even surface whenever possible.
• Use shims or washers to mount the CVM securely and evenly on the mounting surface.
• Mount the CVM in an area free of corrosive vapors that matches the ambient conditions specified
in the Technical specifications section.
• Provide sufficient space around the CVM for cable and wire connections and adequate ventilation
through the controller (at least 50 mm [2 in.] on the top, bottom, sides, and front of the
controllers).
• Do not mount the CVM in areas where electromagnetic emissions from other devices or wiring
can interfere with controller communication.
• Avoid mounting the CVM on surfaces with excessive vibration.
Important: When the air supply to the VAV box is below 10°C (50°F), make sure that any
condensation on the VAV box, particularly on the damper shaft, does not enter the CVM
electronics. Mount the CVM vertically above the damper shaft to allow any shaft condensation
to fall away from the controller. Additional measures may be required in some installations.
On panel or enclosure mount applications, observe these additional guidelines:
• Do not install the CVM in an airtight enclosure.
• Mount the CVM so that the enclosure walls do not obstruct cover removal or ventilation through
the controller.
• Mount the CVM so that the power transformer and other devices do not radiate excessive heat to
the controller.
To mount the CVM controllers, complete the following steps:
1. Set all the switches on the equipment controller to their known settings.
3F4-CVM VAV Terminal Equipment Controllers Installation Instructions
2. Place the CVM controller in the proper mounting position on the damper shaft so that the
wiring connections are easily accessible. Make sure the controller base is parallel to the VAV
box (perpendicular to the damper shaft). If needed, use a spacer to offset tipping of the
controller caused by the shaft bushings.
Note: Use the alignment marks to center the captive spacer to ensure sufficient CVM
movement in either direction.
3. Secure the self-drilling No.10 screw through the captive spacer with a power screwdriver and
100mm (4in.) extension socket. Otherwise, use a punch to mark the position of the shoulder
washer, and then drill a hole into the VAV box using a 3.5mm (9/64in.) drill bit. Insert the
mounting screw and tighten against the spacer.
Important: Do not overtighten the screw, or the threads may strip. If mounting to the VAV
box, make sure the screws do not interfere with damper blade movement.
4. Locate the damper position using the typical marking on the end of the damper shaft as
shown in the figure below.
Figure 2: Typical damper end shaft icons
5. Note the direction, clockwise (CW) or counterclockwise (CCW), required to close the damper.
Grasp the damper shaft firmly with pliers, and either manually close the damper for 90° boxes
or manually open the damper for 45° or 60° boxes.
6. Push down and hold the Manual Override button and turn the CVM controller coupler until it
contacts the mechanical end-stop at either the full-closed (90° boxes) or full-open (45° and 60°
boxes) position.
7. If the damper for a 90° box closes CCW, rotate the coupler to the CCW mechanical limit. If the
damper for a 90° box closes CW, rotate the coupler to the CW mechanical limit. The open end-
stop is automatically set for 90° boxes. For 45° and 60° boxes, you must provide hard stops at
both full-closed and full-open damper positions. If you install the CVM controller at the full-
open position, the controller provides the open stop for 45° and 60° boxes. The closed damper
seal provides the full-closed stop.
8. All models are compact in size and are easily installed on VAV boxes. The models have either a
round shaft up to 13 mm in diameter or a 10 mm square shaft. Tighten the square coupler bolt
to the shaft using an 8 mm (5/16 in.) wrench or 10 mm (3/8 in.) 12-point socket. Tighten to 10.5
to 11.5 N·m (95 to 105 lb·in).
9. Loop the pneumatic tubing (supplied by field personnel) to include a trap for condensation.
Attach the needed length of tubing (supplied and installed by field personnel) to the dual port
fitting on the CVM controller and the other ends of the tubing to the pressure transducer in the
VAV box application .
F4-CVM VAV Terminal Equipment Controllers Installation Instructions4
Note: The CVM uses a digital pressure sensor with bidirectional flow operation, which
allows you to connect the high- and low-pressure DP tubes to either barbed fitting on the
CVM controller. You do not need to make a specific high- or low-side connection when you
attach the tubing to the barbed fittings on the CVM.
10. Push the Manual Override button, and turn the actuator coupling manually to ensure that the
actuator can rotate from full-closed to full-open positions without binding.
11. Complete the mounting by rotating the damper to the full-open position.
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.
CVM03050 physical features
The following figure displays the physical features of CVM03050, and the accompanying table
provides a description of the physical features and a reference to further information where
required.
5F4-CVM VAV Terminal Equipment Controllers Installation Instructions
Figure 3: CVM03050 physical features
Table 1: CVM03050 physical features
Callout Physical features: description and references
1Supply Power Terminal Block: Gray terminal; 24 VAC, Class 2 (see Supply power
terminal block)
2 Device Address Rotary Switches (see Setting the device address)
3 Binary Output (BO) Terminal Block: Black terminals; 24 VAC Triacs (see Table 3)
4Configurable Outputs (CO) Terminal Block: Black terminals; can be defined as
Voltage Analog Output (0–10 VDC) or Binary Output (24 VAC Triac) (see Table 3)
5 Dual Port Fitting
6 Manual Override Button (see Mounting)
7 Coupler Bolt
8 Controller Coupler (see Mounting)
9
Universal Serial Bus (USB) 2.0 Host Type A Port
Note: The USB feature is not currently supported.
F4-CVM VAV Terminal Equipment Controllers Installation Instructions6
Table 1: CVM03050 physical features
Callout Physical features: description and references
10
Universal Inputs (UI) Terminal Block: White terminal; can be defined as one of the
following (see Table 3):
Voltage Analog Input (0–10 VDC)
Resistive Analog Inputs (0–600k ohm): 0–2k Potentiometer (see Table 3)
RTD: 1k Nickel, 1k Platinum, or A99B SI
NTC: 10K Type L (10K Johnson Controls Type II is equivalent to Type L) or 2.252K Type
II
Dry Contact Binary Input
11 Sensor Actuator (SA) Bus Terminal Block: Orange terminal (see SA bus terminal
block)
12 Field Controller (FC) Bus Terminal Block: Blue terminal; may also be used for N2
connections, see FC bus terminal block (or N2 protocol as required)
13 EOL (End-of-Line) Switch (see Setting the End-of-Line (EOL) switch)
14 SA Bus Port: RJ-12 6-Pin Modular Jack (see Modular ports)
15 FC Bus Port: RJ-12 6-Pin Modular Jack (see Modular ports)
16 Captive Spacer and Screw
17 LED Status Indicators (see LED status and states )
7F4-CVM VAV Terminal Equipment Controllers Installation Instructions
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 FX-PC Series Controllers MS/TP Communications Bus Technical Bulletin (LIT-12011670). For detailed
information about wiring an N2 network, refer to the N2 Communications Bus Technical Bulletin
(LIT-636018).
Terminal blocks and bus ports
See CVM03050 physical features for input and output terminal and bus port locations on the
CVM03050 controllers. Observe the following guidelines when wiring a CVM controller.
Input and Output terminal blocks
On the CVM controller models, the input and output terminal blocks are removable. 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 more
information about I/O terminal functions, requirements, and ratings, see Table 3.
F4-CVM VAV Terminal Equipment Controllers Installation Instructions8
FC bus terminal block (or N2 protocol as required)
The FC Bus terminal block is a blue, removable, 4-terminal plug that fits into a board-mounted pin
header.
Use a 3-wire twisted, shielded cable, as shown in Figure 4, to wire the removable FC Bus terminal
block plugs on the CVM and other controllers in a daisy-chain configuration. For more information
about FC Bus terminal functions, requirements, and ratings, see Table 4.
Figure 4: FC bus terminal block wiring
Note: The Shield terminal (SHLD) on the FC Bus terminal block is isolated and can be used to
connect the cable shields on the bus (Figure 4).
SA bus terminal block
The SA Bus terminal block is an orange, removable, 4-terminal plug with +15 VDC that fits into a
board-mounted jack.
Use a 4-wire twisted, shielded cable, as shown in Figure 5, to wire the removable SA Bus terminal
block plugs on the CVM and other SA Bus devices in a daisy-chain configuration. For more
information about SA Bus terminal functions, requirements, and ratings, see Table 4.
9F4-CVM VAV Terminal Equipment Controllers Installation Instructions
Figure 5: SA bus terminal block wiring
Modular ports
The modular SA and FC bus ports on the face of the CVM (Figure 6) are RJ-12 (6-position) modular
jacks as shown in Figure 6.
The modular SA Bus port provides a connection for the Mobile Access Portal (MAP) Gateway,
VAV Balancing Tool , FX-DIS1710 Local Controller Display, WRZ78xx Series One-to-One Wireless
Transmitter, and NS Series sensors.
Note: The MAP Gateway serves as a replacement for the BTCVT, which is no longer available
for purchase, but continues to be supported.
Figure 6: Pin number assignments for sensor, FC bus, and SA ports on equipment controllers
The modular SA Bus port provides a connection for the MAP Gateway, ATV7003 VAV Balancing Tool ,
FX-DIS1710 Local Controller Display, FX-WRZ78xx Series One-to-One Wireless Transmitter, and NS
Series sensors. The modular FC Bus port provides a connection for the Bluetooth Commissioning
Converter and the FX-ZFR Wireless Router.
F4-CVM VAV Terminal Equipment Controllers Installation Instructions10
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