Johnson Controls NXA-VAV-01 User manual
NXA-VNXA-V
NXA-VNXA-V
NXA-V
AA
AA
AV-01V-01
V-01V-01
V-01
VARIABLE AIR VOLUME
CONTROLLER
Installation Guide
TEC DOC # LIT-TD-2001 09/2001
The documentation contained in this publication is the exclusive
property of Johnson Controls, Inc., and its use is restricted to the
licensed software with which it is furnished. This publication may not
be used for any other purpose without the express written consent of
Johnson Controls, Inc. Johnson Controls, Inc., reserves the right to
update specifications when appropriate. Information contained in
this document is based on specifications believed to be correct at the
time of publication.
Echelon ©, Coactive©, Windows NT©, and General Electric©are
registered trademarks and service marks of companies other than
Johnson Controls, Inc. FSC™, CPL™ and NexSys™ are trademarks of
Johnson Controls, Inc.
© 2001 Johnson Controls, Inc. All Rights Reserved
System Products www.johnsoncontrols.com
9410 Bunsen Parkway Revised 09/2001
Louisville, KY 40220 Printed in U.S.A.
FCC WARNING
The Federal Communications Commission (FCC) requirements pre-
scribe certification of personal computers and any interconnected
peripherals in the FCC rules and regulations.
This device complies with Part 15 of the FCC rules. Operation is
subject to the following two conditions: This device may not cause
harmful interference, and this device must accept any interference
received, including interference that may cause undesired operation.
This equipment generates and uses radio frequency (RF) energy for its
operation and, if not installed and used in accordance with the
installation and operation manual, may cause interference to radio
and television reception. It has been found to comply with the limits
for a Class A computing device pursuant to the aforementioned
regulations. These are designed to provide reasonable protection
against such interference when operated in a residential area. Only
peripherals (computer input/output devices) certified to comply with
the Class A limits may be connected to this device. Operation with
noncertified computer peripherals is likely to result in interference
with radio and television reception. If this equipment does cause
interference to radio or television reception, the user is encouraged to
correct the situation by one or more of the following measures:
•Relocate the receiver with respect to the computer.
•Move the computer away from the receiver.
•Plug the equipment into a different outlet, so that the computing
device and receiver are on different branch circuits.
•Disconnect and remove any unused cables that may be acting as a
transmission source.
•Make certain that the computing device is plugged into a
grounded outlet receptacle.
If necessary, contact Johnson Controls, Inc., for additional sugges-
tions.
Installation Guide VAV-01 Controller NexSys
4
SYMBOLS
This is the symbol for Electro-Static Discharge. Electro-Static
Discharge (ESD) can damage certain electronic devices. ESD
is a transfer of electrostatic charge between bodies at different
electrostatic potentials caused by direct contact or induced by a
electrostatic field. The threshold for feeling an electro-static discharge
is approximately 900 to 1000 volts. The average spark produced by a
static discharge from a human body varies from about 10,000 to
25,000 volts.
ESD can cause damage to integrated circuits (IC). Due to the small
size of these complex devices, the ESD sensitivity has increased so
much that some of these devices can be destroyed or damaged by as
little as 20 volts. ESD damage is easy to induce, hard to detect, and is
expensive to repair. Workers could be subjecting an electronic device
to lethal voltages without being aware. The following is a list of
precautions when handling static sensitive devices.
·A conductive ground strap should be worn to assure that you are at
ground potential. If a ground strap cannot be used, you should
ground yourself before touching the device and remain in contact
with a grounded metallic object during the entire time while
working with the device.
·Containers, tools, test equipment, and fixtures that come into
contact with the device should be properly grounded. Grounding
of electrical equipment should be done by a grounded plug, not
through the conductive surface of the grounded workstation.
· Workers clothing should never make contact with the device and
workers should avoid activities that cause friction in the area of the
workstation (wiping feet, rubbing of hands, etc.).
·Workers should avoid touching leads or contacts.
This is the symbol for caution and represents possible
equipment damage. When this symbol appears, follow the
succeeding text to prevent possible equipment damage.
This is the symbol for danger and represents possible bodily
injury or threat to life and limb. When this symbol appears,
follow the succeeding text closely for safe operation.
NexSys VAV-01 Controller Installation Guide
5
Table of Contents
VAV-01 Overview ..................................................................................... 6
Inspection .................................................................................................... 7
Requirements .............................................................................................. 7
Location ...................................................................................................... 7
Mounting..................................................................................................... 8
Airflow Sensor Connections ............................................................ 9
Wiring Connections ................................................................................... 11
Power Supply ............................................................................................. 11
Power Connections............................................................................ 11
Thermistor Wiring ............................................................................. 12
Digital Outputs ................................................................................... 13
Digital Outputs DO-1 and DO-2 - Damper Wiring ................. 14
Digital Output DO-3 - Fan Wiring ................................................ 15
Digital Output DO-4 and DO-5 - Electric Staged Reheat ........ 16
Digital Output DO-4 and DO-5 - Floating Reheat .................... 18
Digital Output DO-4 and DO-5 - Pulse Width Modulation .... 19
Warranty ...................................................................................................... 20
Warranty Limitations ......................................................................... 20
Disclaimer of Warranties .................................................................. 20
Purchaser’s Responsibility.................................................................. 20
Installation Guide VAV-01 Controller NexSys
6
VAV-01 OVERVIEW
The JCI VAV-01 Controller consists of a Variable Air Volume (VAV)
controller integrated with a velocity pressure sensor. It provides
pressure dependent/independent cooling control for fan powered VAV
terminal boxes with or without reheat capacity.
The VAV-01 Controller is a 4”x 6” circuit board using SMT (surface
mount technology) components. The board is snap-track mountable
and has a built-in airflow sensor, 5 Triac outputs, 24 VAC input, a FTT-
10 free topology transceiver and a STAT/Configuration port. The VAV-
01 can support stand-alone operation but is best utilized when used
in conjunction with network communications. The unit is shown in
Figure 1 below:
Network
Connection
ESUSA
Thermostat
Connection
}
Analog
Input
24VAC
Power
Input
}
Digital
utputs
VAV-01 Cover
}
}
Airflow
Sensor
Inputs
(Pneumatic)
}
RESET
Pushbutton
Service
Pushbutton
Service
Pushbutton
LED
Service
RESET
P2
(HI)
Stat
Port
Status
LED
UT TEST
THERM
TEMP
GND D 5 D 4 D03 D02 D01 NET +NET -STAT +STAT-
utput
Test
Jumper
P1
(L )
GND
H T NEU
24VAC
D5
S3
D1
S1
S2
J4 J3 J2
J1
Figure 1. VAV-01 Controller.
NexSys VAV-01 Controller Installation Guide
7
INSPECTION
Inspect the carton for possible damage. If damaged, notify the
appropriate carrier immediately. Inspect the components for obvious
damage. Contact Electronic Systems USA before returning damaged
products.
REQUIREMENTS
• Job wiring diagrams.
• Tools (not provided):
- Appropriate screwdrivers for wiring terminals and mounting screws.
- Digital Volt/Ohm Meter (DVM).
• Training: Installer must be a qualified, experienced technician.
• VAV-01, enclosure for conduit applications (not provided).
• ULlisted Class 2 power transformer (not provided) supplying a
nominal 24 VAC (20.4 to 30 VAC) with a minimum rating of 5 VA at
50/60 Hz and 5 VA plus DO load ( 24 VA total max.) at 50/60 Hz.
LOCATION
CAUTION
• AVOID LOCATIONS WHERE EXCESSIVE MOISTURE, CORROSIVE
FUMES, EXPLOSIVE VAPORS, OR VIBRATIONS ARE PRESENT.
• AVOID ELECTRICAL NOISE INTERFERENCE. DO NOT INSTALL NEAR
LARGE CONTACTORS, ELECTRICAL MACHINERY, OR WELDING
EQUIPMENT.
• JCI VAV-01 CONTROLLERS ARE INTENDED FOR INDOOR USE ONLY.
LOCATE WHERE AMBIENT TEMPERATURES DO NOT EXCEED
131°F (55°C) OR FALL BELOW 32°F (0°C) AND RELATIVE HUMIDITY
Installation Guide VAV-01 Controller NexSys
8
DOES NOT EXCEED 85% OR FALL BELOW 5%, NON-CONDENSING.
MOUNTING
The JCI VAV-01 Controller can be mounted in any direction and on
any plane. Mounting dimensions are 4”x6” overall board size for
snap-track mounting. For applications requiring mounting using
standoffs the .150” circuit board mounting holes are spaced 3.5”x5.5”.
Dimensions shown in Figure 2 below are in inches and (mm).
When mounting the JCI VAV-01 Controller in the snap-track railing be
careful not to exert too much pressure when inserting the VAV-01
board into the snap-track.
NOTE:
Follow static electricity precautions when installing, servicing,
or operating the system.
GND
H T
NEUTRAL
Service
RESET
HIGHL W
THERM
TEMP
GND D 5 D 4 D03 D02 D01 NET +NET -STAT+STAT-
UT TEST
4.00"
(102)
3.50"
(89)
.25"
(6)
.25"
(6)
5.50"
(140)
6.00"
(152)
1.315"
(33)
NexSys VAV-01 Controller Installation Guide
9
Figure 2. Mounting dimensions
.
AIRFLOW SENSOR CONNECTIONS
Use either 1/4 in. O.D. FRPE polyethylene tubing or 1/8 in. I.D.
Tygon tubing for piping connections. Maximum run of tubing is 5
feet.
1. Remove the yellow plastic fitting caps from the barbed fittings of
the VAV-01 airflow sensor inputs. See Figure 3 below.
2. Connect the tube from the low pressure fitting on the controller
to the low pressure tap on the airflow sensor. See Figure 3
below.
3. Connect the tube from the high pressure fitting on the controller
to the high pressure tap on the VAV terminal. See Figure 3
below.
Installation Guide VAV-01 Controller NexSys
10
Service
RESET
P2
(HI)
UT TEST
THERM
TEMP
GND D 5 D 4 D03 D02 D01 NET +NET -STAT +STAT- GND
H T NEU
24VAC
To HIGH pressure fitting on the airflow sensor.
To L W pressure fitting on the airflow sensor.
P1
(L )
Figure 3. Airflow Sensor Connections.
Table of contents
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