Honeywell CVL4022ASVAV1 Engineering Manual page 4

FEATURES
• Reduces engineering and maintenance time, and ensures
proper operation.
• Quick configuration saves time for System Integrators.
• Provides reliability and simplicity to building owners.
• Built-in VAV control applications.
• Uses the Echelon® LONWORKS® network protocol.
• Free Topology Transceiver (FTT) high-speed 78 kilobit
communications network.
• Field configurable for control, input, and output functions
using the NIAGARA FRAMEWORK® software, or Zio wall
module.
• Capable of stand-alone operation, but can also use
• LONWORKS® Bus network communications.
• Sylk™ bus for use with Sylk-enabled devices.
• 120 controllers per network with Q7751A,B Router when
configured as a repeater.
• Significant Event Notification, Periodic Update capability,
and Failure Detect (FD) when network inputs fail to be
updated within their configurable time frame.
• All wiring connections are made to removable terminal
blocks to simplify controller installation and replacement.
• The controller housing is UL plenum rated.
• Configurable Primary air control: Pressure independent or
dependent Variable Air Volume.
• Configurable reheat output: analog modulating or staged
(up to 3 stages)
• Heating PID control loop parameters tuned as a function of
reheat type (modulating or staged) and the number of
stages
• Configurable peripheral heating including: none, staged,
modulating, sequence before or after reheat
• Network initiated:
— Schedule Bypass
— Demand Limit Control
— Emergency commands override airflow control during
an event such as a fire
— Morning Warm-up with configurable Warm-up operat-
ing modes
— Local modulating output
— Temperature setpoint shift
• Network override of:
— Local time schedule.
— Reheat and peripheral heating valves
— Airflow control.
— Occupancy mode
— Effective space temperature setpoint
— Local inputs
• Network sharing of
— Occupancy Sensor
— Space temperature
— CO2 Sensor
— Humidity Sensor
— Wall Module
— Outdoor air temperature
— Outdoor air humidity
— Supply temperature
— Time Schedule
31-00083—02
— Window sensor
— Bypass button
• Occupant initiated Schedule Bypass
• Air Flow balance options: K factor and or two point using
Zio Wall Module as well as Network Tools.
• CO2 coordinated minimum ventilation
• 2 freely configurable PID loops that can be used to control
additional equipment using free pins available.Supply &
Return Flow tracking
• Lighting control
• Master Wall Module shared with multiple satellite VAV box
controls
• Perhipheral heat sequenced with reheat
• Control fault tolerance:
a. Pressure dependent fallback control strategy if pres-
sure sensor fails (invalid value)
b. Airflow reverts to minimum flow if space temperature
sensor fails (invalid value)
c. Reverts to local space sensor if Wall Module sharing
network communications fails
Table 2. Capabilities of CVL controllers
CVL Controller
Capability
Fan
None
Series
Parallel - Temp
Parallel - Flow
Parallel - Analog
Reheat
None
One Stage Reheat
Two Stages Reheat
Three Stages Reheat X
One Stage Periph
Floating Reheat (Two
digital outputs)
Floating Periph (Two
digital outputs)
PWM Reheat (One
digital output)
PWM Periph (One
digital output)
Analog Reheat
Analog Peripheral
Wall Module Type
TR71/75
T7770/TR2X
(Conventional)
4
CVL4022AS- CVL4024NS-
VAV1 VAV1
X X
X X
X X
X X
X X
X X
X X
X X
X
X X
X X
X X
X X
X X
X X
X X
X X
X X