| Вид документа | Технічний бюлетень |
|---|---|
| Виробник | JCI |
| Код документа | variable-air-volume-modular-assembly-vma-1400-series-overview-and-engineering |
| Група обладнання | VMA14 VAV Modular Assembly |
| Сторінок | 35 |
| Мова документа | англійська |
| Розмір файлу | 0.5 МБ |
Текст документа
Technical Bulletin
Issue Date February 28, 2006
Variable Air Volume Modular Assembly (VMA) 1400
Series Overview and Engineering Guidelines
VMA1400 Series Overview and Engineering Guidelines ...................2
Introduction......................................................................................................... 2
Key Concepts...................................................................................................... 3
VMA1400 Series Models................................................................................................... 3
VAV System ...................................................................................................................... 6
Definition of Terms ............................................................................................................ 9
Room Sensor Placement ................................................................................................ 10
Pressure Independence .................................................................................................. 10
VMA Airflow Rate ............................................................................................................ 10
Power Source.................................................................................................................. 11
N2 Bus Rules .................................................................................................................. 12
Inputs and Outputs.......................................................................................................... 13
Zone Bus......................................................................................................................... 14
CablePRO ....................................................................................................................... 15
CVTPRO ......................................................................................................................... 15
Related Documentation................................................................................................... 16
Application Examples...................................................................................................... 17
Reference Information..................................................................................................... 26
Specifications .................................................................................................................. 27
Detailed Procedures......................................................................................... 32
Determining VAV Box Requirements .............................................................................. 32
Establishing the Room Schedule .................................................................................... 32
Developing the Bill of Material and Placing Orders ......................................................... 33
Configuring the VMA ....................................................................................................... 35
© 2006 Johnson Controls, Inc. www.johnsoncontrols.com
Code No. LIT-6363120
2 VMA1400 Series Overview and Engineering Guidelines Technical Bulletin
VMA1400 Series Overview and
Engineering Guidelines
Introduction
The Variable Air Volume Modular Assembly (VMA) 1400 Series is a
configurable, integrated module that includes a Variable Air Volume
(VAV) controller, differential pressure sensor, and, with the exception
of the VMA1430, an actuator.
Note: This document focuses on the VMA1410, 1420, and 1430
controllers. The VMA1400 Series also includes the VMA1440, which
is used exclusively as part of the Metasys® Zoning Package. See the
Metasys Zoning Package Product Bulletin (LIT-639050) and the
Metasys Zoning Package Overview Technical Bulletin (LIT-639100)
for information on this specialized product.
The VMA engineering procedures vary from location to location. The
information provided here is a general engineering guideline. Where
available, use the Advanced Installation Management (AIM) tools for
developing schedules and drawings.
This document provides a VMA1400 Series overview and describes
how to:
determine VAV box requirements
establish the room schedule
develop bills of material and place orders
configure the VMA
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 3
Key Concepts
VMA1400 Series Models
VMA1410 VMA1430
VMA1420
VMA14xx
Figure 1: VMA1400 Series Models
The VMA is a configurable, integrated module that includes a VAV
controller and differential pressure sensor. The VMA1400 Series
includes three models:
VMA1410 (cooling only, includes actuator)
VMA1420 (cooling with reheat, includes actuator)
VMA1430 (controller and differential pressure sensor only for use
with an external incremental or proportional actuator)
Note: The VMA1400 Series also includes the VMA1440, which is
used exclusively as part of the Metasys Zoning Package. See the
Metasys Zoning Package Product Bulletin (LIT-639050) and the
Metasys Zoning Package Overview Technical Bulletin (LIT-639100)
for information on this specialized product.
The models are designed for pressure independent, single duct
(all VMA1400 Series models), and dual duct (VMA1420 and
1430 only) applications. The VMA1420 and 1430 models can be used
with parallel or series fan-powered boxes.
Note: The VMA1420 can be configured for the Metasys Zoning
Package application, but the internal pressure sensor can only be used
for monitoring purposes. Refer to the Metasys Zoning Package
Commissioning Technical Bulletin (LIT-639250).
4 VMA1400 Series Overview and Engineering Guidelines Technical Bulletin
Table 1: VMA1400 Series Comparison Checklist
VMA Features 1410 1420 1430 Comments
Applications
Pattern Recognition Adaptive Y Y Y Eliminates manual tuning and
Control (PRAC) on Zone Proportional seasonal re-tuning
plus Integral plus Derivative (PID)
Temperature Loops
Adaptive Flow Control Loops Y Y Y Eliminates manual tuning,
improves control and energy
savings
Single Duct, Pressure Independent Y Y Y Meets most VAV applications
VAV
Side Loops without Interlocking N Y Y Single Analog Input (AI) to Analog
Output (AO) or Binary Output
(BO)
Single Duct Supply/Exhaust VAV N Y Y Flow differential control
Fan Powered Boxes N Y Y Series or parallel
Incremental, Proportional N Y Y Staged heat or normally
Two Position, and Three Stages of open/normally closed valves
Box Heat
Incremental, Proportional N Y Y Normally open or closed valves
Two Position, or One Stage
Supplemental Heat
Dual Duct, Pressure Independent N Y Y Flexible flow setpoint specification
VAV
Damper Actuator (Internal)
Accurate Positioning Y Y N/A 23,000 step resolution
Stall Detection Y Y N/A Detects damper travel stops
Automatic Damper End Stop Y Y N Sets damper stroke time
Detection at Power Up
Clockwise (CW)/ Y Y Y Set via HVAC PRO™ software for
Counterclockwise (CCW) either direction to close
Rotation Selection
EP8000 with Pneumatic Actuator N Y Y
Software Tools
Ability To Download Code Firmware Y Y Y Allows firmware code upgrade
without removing the VMA
Diagnostics
Moving Average Flow/Temperature Y Y Y Provides standard measure of
Diagnostic control loop performance over
time
Actuator Stall Y Y N/A
Flow Test Y Y Y
Data Graphing Y Y Y Only for single duct applications
Starved Box Detection Y Y Y Allows air handler reset and flow
diagnostics
Actuator Duty Cycle Diagnostic Y Y Y Indicates shaft slippage
Continued on next page . . .
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 5
VMA Features (Cont.) 1410 1420 1430 Comments
Commissioning
Balancing Tool with Automatic Y Y Y HVAC PRO software (single duct
Pickup Gain Calculation only) or VMA Balancing Tool
(VBT) software on Zone Bus
Hardware
24 Volts Alternating Current (VAC) Y Y Y Eliminates 24 to 24 VAC
Isolation Built-in transformer and polarity concerns
Multiple VMAs per 100 VA Y Y Y Ten cooling only (VMA1410) or
Transformer 14 VMA1430s. Reheat/fan unit
depends on valve/fan relays
Isolated N2, Binary Outputs, and Y Y Y Saves installed cost and improves
24 VAC electrical noise rejection
Ability to Drive Low Current Relays N Y Y Eliminates relay chatter
Down to 25 milliampere (mA)
15 Bit Analog Input/12 Bit Analog AI Y Y Provides improved control device
Output Resolution only resolution
Analog Input Jumpers Eliminated Y Y Y Reduces labor because all analog
inputs are preset
Differential Pressure Transducer
Dead Ended Transducer Y Y Y Requires no filters or maintenance
Stainless Steel Capacitive Y Y Y Provides improved stability
Technology
Industry Accepted Flow Y Y Y Provides stability below 1 m/s
Measurement Accuracy (200 fpm)
Temperature Sensors
Variety of Sensors Y Y Y Nickel, 1 K platinum, silicon,
2.25K NTC
Temporary Occupied Button Y Y Y On TE-6700, TE-7000 (Europe
only), and TMZ1600 Series room
sensors
Temporary Occupied Light-Emitting Y Y Y On TE-6700, TE-7000 (Europe
Diode (LED) only), or TMZ1600 for timed
override (Temporary Occupied)
LED Indicator for N2/Power Y Y Y Verifies N2 and power
connections
Physical
Small, One Piece Assembly: Y Y Y Reduces installation cost
VMA1410, VMA1420
152.4 x 101.6 x 101.6 mm
(6 x 4 x 4 in.)
VMA1430
152.4 x 101.6 x 82.6 mm
(6 x 4 x 3.25 in.)
Plenum Plastic Housing Rating Y Y Y Underwriters Laboratories®, Inc.
(UL) 94-5VB plenum flammability
eliminates metal box
Removable I/O Screw Terminals Y Y Y Two or three position accessories
6 VMA1400 Series Overview and Engineering Guidelines Technical Bulletin
VAV System
Theory of Operation
A VAV air handling system typically consists of a single air handling
unit and multiple terminal units. Terminal units typically consist of a
damper and flow sensing probe installed in an enclosure. VAV
terminal units are also called VAV boxes. VAV systems are
predominantly single duct, but about 15% are dual duct designs.
In either case, the supply air temperature and static pressure of the
air handling unit are controlled by an AHU (Air Handling Unit)
controller, while each zone has its own VMA controller.
The air handling unit typically maintains a static pressure in the range
of 125 to 375 Pa (0.5 to 1.5 inches water column (w.c.) inside the
longest run of duct away from the supply fan. This ensures that each
VAV terminal unit has enough pressure at its inlet to deliver the
maximum required flow of air into the space. The supply temperature
is typically in the range of 7 to 16°C (45 to 60°F) for a single duct
VAV system or the cold deck of a dual duct VAV system. The hot
deck temperature of a dual duct VAV system is typically in the range
of 29 to 49°C (85 to 120°F).
VAV systems are most easily understood by first considering a
cooling-only application. As the zone temperature increases, the VAV
controller opens the VAV box damper to allow more cool air to reach
the space. The volume of air required to maintain a particular zone
temperature setpoint is dictated by the size of the space and the
internal and external heat loads. In addition, since the size of the VAV
box dictates its maximum cooling capacity, a VAV box’s performance
is dependent upon the mechanical engineer’s correct box sizing for
each zone.
Sometimes the size, and thus the capacity, of the VAV box may not
match the zone loads. If the installed unit is too small, insufficient
cooling results and noise may be emitted at high flow. If the installed
unit is too large, proper control may be difficult to attain, since a small
change in damper position causes a large change in airflow. Boxes can
be oversized to allow for quieter operation or reserve cooling capacity
at the expense of controllability.
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 7
The VMA quickly adjusts the damper position to new conditions, and
minimizes position hunting and motor runtime. The fast response
stepper actuator on the VMA1410 and 1420 drives the damper from
full open to full closed in 30 seconds. This significantly reduces the
time to commission a VAV box. Response time of the VMA1430 with
an external synchronous actuator is dependent upon the speed of the
actuator used. The VMA incorporates flow feedback to accurately
position the damper. Control performance metrics are recorded and are
available via the Metasys Operator Workstation (OWS) for timely
indication of system problems.
The VMA is configured for most VAV applications. Configuration
Tools (HVAC PRO software), Version 7.00 or later builds the
applications for VMA1410/1420. Version 7.02 or later includes the
VMA1430 as well as the VMA1410/1420.
8 VMA1400 Series Overview and Engineering Guidelines Technical Bulletin
Ethernet LAN
Network
Network Control N30
Control Unit Module
N 30
(NCU) (NCM)
VMA1400
Operator Workstation
DX9100
DX9100
AHU
VAV
UNT
VMA1400
TC9102 UNT
VMA1400
Unitary
Controller
(UNT)
N2
Zone
CablePRO Bus
N2 Converter
Laptop Room
Room Sensor
Sensor
Palm™ Compatible
Handheld Device
Zone
CVTPRO Bus
Converter
VMAMTSY6
Figure 2: VMA in Metasys Network Diagram
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 9
Definition of Terms
Autocalibration
To correct for pressure sensor drifts over time, the VMA has an
Autocalibration mode that automatically compensates for temperature
and humidity effects.
N2 Switches
Single-pole, single-throw switches used to set the N2 address of a
controller.
Room Schedule
A set of information listing all parameters required in a room or zone.
Test and Balance (TAB)
Test and Balance (TAB) is a function performed to ensure the installed
system operates to design specifications. Balancing of the VMA zone
indicates whether the VAV terminal box is able to achieve
minimum/maximum airflow settings. TAB must also be performed for
the air handler and the air duct distribution to the VAV box.
Zones
When designing VMA systems, it is critical to establish zones
correctly to take full advantage of VMA’s exceptional accuracy and
rapid response capabilities.
The designer strives for the most uniform indoor environmental
conditions possible. A single thermostatic device (room sensor)
controls each area. Also, you may consider a zone any area where the
load is approximately the same for every square foot of floor space.
Heating, Ventilating, and Air Conditioning (HVAC) system zones fall
into two major categories: exterior zones and interior zones. Exterior
zones are spaces directly affected by outdoor weather conditions.
Interior zones are not influenced by heat losses or outdoor air
conditions. Interior zones usually have cooling or ventilation
requirements only.
Further division of interior/exterior zones is occasionally required to
accommodate different occupancy schedules and/or solar loads.
Variations in internal loading also dictate the selection of separate
zones. For example, in a restaurant, the kitchen has much different
heating and cooling requirements than the customer seating area.
10 VMA1400 Series Overview and Engineering Guidelines Technical Bulletin
Room Sensor Placement
When considering room sensor placement for each zone:
• Verify that the room sensor is the correct one for the
application.
• Review architectural requirements such as furniture height and
location, aesthetics, and type of mounting. Wall plates are
required if mounting on a conduit handibox.
• Review room sensor location. The best room sensor location is
on an interior wall, about 1.5 m (5 feet) above the floor, out of
direct sunlight, out of the direct path of supply air from the
diffuser, away from heat sources, such as equipment, machines,
and perimeter radiation, and away from doors and other draft
sources. Local codes or disabilities act requirements
occasionally influence the actual mounting height.
• Do not locate a sensor near zone boundaries, where primary
influence is from an adjacent zone.
Pressure Independence
The pressure independent VMA employs patented self-tuning,
cascaded proportional/integral control loops. The zone temperature
loop samples space temperature and resets the airflow setpoint
between the minimum and maximum flow settings. Since inlet duct
static pressure influences the amount of air passing through the VAV
box, the VMA airflow loop samples airflow via a flow pickup in the
box inlet. It modulates the damper to control the flow. Thus, the
VAV box flow is independent of duct static pressure.
The engineering basis for this method of control is that the temperature
of a space with a constant load is linearly proportional to the flow of
conditioned air into the space. The engineer must accurately determine
the required maximum and minimum flow for each space based on
heating, cooling, and ventilation loads.
VMA Airflow Rate
The VMA determines airflow rate by dynamic pressure measurement.
The VMA contains a Differential Pressure Transducer (DPT) to sense
velocity pressure in pressure independent VAV applications.
The DPT is connected to the VAV box airflow pickups. It measures
velocity pressure and generates a proportional voltage signal. The
VMA reads voltage signal from the DPT and converts it to airflow in
cubic feet per minute (cfm), liters/second, or cubic meters/hour.
Calibration is not required, with the exception of zero calibration,
which the controller performs automatically as set in the configuration.
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 11
The DPT provides maintenance-free performance within the control
range of 1 to 18 m/s (200 to 3500 feet per minute [fpm]) when used as
recommended.
Pressure independent VAV terminal boxes use an airflow pickup
device, which amplifies the airflow velocity pressure between 1.5 to
3 times (varies by manufacturer). The airflow velocity and the gain of
the airflow pickup produce an accurately measured pressure
difference.
The VMA Autocalibration function helps reduce the temperature
effect error by zeroing offset errors. As the ambient temperature
swings relative to the temperature at which the Autocalibration
occurred, an offset error occurs. In the worst case, the offset error
ranges up to ±0.179 Pascal per °C (±0.0004 inch w.c. per °F).
When calibration occurs, this error becomes zero.
The error envelope becomes smaller with increased airflow pickup
gain and with smaller ambient temperature deviations at the
transmitter location.
Power Source
You can use one 24 VAC power trunk to power multiple VMAs.
Transformers of up to 100 VA can be centrally located and the
secondary run can be without conduit (if allowed by local authority)
and without concern about polarity. When using a single transformer
to power multiple VMAs, use a wire gauge large enough to handle the
current and minimize the voltage drop. The voltage drop depends on
the current draw, wire gauge, and wire length. For more details about
transformer wiring and calculating the number of VMAs per
transformer, see the Mounting and Wiring Variable Air Volume
Modular Assembly (VMA) 1400 Series Controllers Technical Bulletin
(LIT-6363125).
Note: The 24 V power transformer must be UL/Canadian
Standards Association (CSA) listed as NEC Class 2 Power Limited.
See NEC Article 725/Class 2 (30 VRMS maximum) and
(100 VA maximum).
12 VMA1400 Series Overview and Engineering Guidelines Technical Bulletin
N2 Bus Rules
The N2 Bus is the interface between a supervisory controller
(Metasys Network Control Module [NCM] or N30) and all application
specific controllers in a Metasys Network. The VMA is
self-terminating in that there are no End-of-Line (EOL) jumpers to set.
However, you must set one EOL for each N2 Bus, usually at the NCM
or N30. Table 2 summarizes the rules for installing the N2 Bus.
Table 2: N2 Bus Rules
Category Rules/Maximums Allowed
General Only one NCM or N30 per N2 Bus
Only daisy-chained devices
Maximum Number of Devices 100 devices per NCM or 50 devices per N30
50 devices per repeater*
Two repeaters cascaded
Line Length and Type 1500 m (5000 feet) between repeaters
4500 m (15,000 feet) maximum length
(3 segments of 1500 m [5000 feet] each)
0.6 mm (24 American Wire Gauge [AWG])
twisted pair minimum
(stranded 0.8 mm [22 AWG] twisted pair or
heavier recommended)
Terminations Two EOL devices per each segment that is
longer than 100 m (330 ft)
One EOL device at the controller for all
segments regardless of length (required)
* Add repeater after 49 devices. Count each repeater as one device.
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 13
Inputs and Outputs
For specific input/output range, cable length, wire size issues, refer to
the Mounting and Wiring Variable Air Volume Modular Assembly
(VMA) 1400 Series Controllers Technical Bulletin (LIT-6363125).
Note: All terminals are spade lug type except the N2 terminals,
which are removable screw terminals. Optional two-, three-, or
four-position kits (available for order) convert the spade lugs to
removable screw terminals.
Table 3: Inputs and Outputs
Input/Output Description
Analog Inputs There are two external and one internal analog inputs on the VMA1410 and four external
and one internal analog inputs on the VMA1420 and 1430. They are preset for either
temperature/setpoint or voltage. There are no jumpers to set. Shielding is not required, but if
used, earth ground the shield only at the VMA. You may use 0.6 mm (24 AWG) twisted pair
wire; however, this reduces the allowable wire length due to the resistance for Nickel (Ni),
Platinum (Pt), or Silicon (Si) sensors. To minimize sensor error caused by field wiring, the
total resistance of the nickel, silicon, or platinum resistive sensor wiring should be less than
3 ohms. The NTC sensor accepts a larger wire resistance. This wiring error effect can be
corrected through HVAC PRO software in the VMAs analog input.
Do not share the temperature/setpoint common wire (COM) with any other sensors,
transmitters, or the Zone Bus. The maximum voltage drop on the common wire must be less
than 1 mV.
Binary Inputs There are three dry contact binary inputs on the VMA. An override button on the room
sensor initiates a Temporary Occupancy or Time Override mode of operation when pressed.
When using the TE-6700 or TE-7000 (Europe only) sensor, TempOcc shorts BI-1 directly.
Hold for 2.0 seconds.
The binary inputs on the VMA are inactive when open. They are active when you apply a
contact closure to binary input common (COM).
Analog There are two analog outputs on the VMA1420 and VMA1430. The VMA1410 has no
Outputs analog outputs. The load connects between the analog output and analog output common
(COM) terminals. Each output generates a proportional voltage output of 0 to 10 VDC. The
maximum load for each output is 10 mA with a minimum load resistance of 1000 ohms.
Note that two analog outputs are available on the VMA1430 for proportional reheat valves
or a proportional damper actuator.
Binary The VMA1410 has no external binary outputs. The VMA1420 and VMA1430 have
Outputs five external binary outputs. The damper actuator wires internally to the VMA1410 and
VMA1420. Each load connects between the BO terminal and BCOM common terminal.
These outputs switch the transformer’s low side to the output allowing the relays, actuators,
or transformers to be earth grounded through Terminal 1 when needed to meet codes.
A floating/3-wire (incremental) actuator wires externally to two of the five BOs on the
VMA1430. There are only three BOs remaining for fan, box heating, supplemental heating,
and lighting.
14 VMA1400 Series Overview and Engineering Guidelines Technical Bulletin
Zone Bus
The Zone Bus is a 2-wire communications bus that allows a computer
to commission and balance the VMA’s database. The computer must
have the proper software and must connect through the CablePRO
(AS-CBLPRO or IU-9100 in Europe) or CVTPRO (AS-
CVTPROx00-x) converter and the room sensor. The VMA also
supplies 15 VDC through the Zone Bus connector to power the
CablePRO or CVTPRO converter.
Note: The VMA supplies 15 VDC instead of 24 VAC supplied by
other Application Specific Controller (ASC) devices. The Zone Bus
does not function properly if connected to 24 VAC on the VMA.
Table 4: Zone Bus Specifications
Feature Specification
Type Multi-drop serial communications bus, single ended
(North America) or differential (Europe)
Speed 1200 baud (bits per second)
Recommended Cable 1.5 mm2 (18 AWG) with or without shield
Type (Beldon 8760)
or
0.6 mm (24 AWG) without shield (unshielded
telephone cable)
Maximum Bus Length
Single Ended 150 meters (500 feet) with 1.5 mm2 (18 AWG) cable
15 meters (50 feet) with 0.6 mm (24 AWG) cable
2
Differential 1500 meter (5000 feet) of 0.6 mm - 1.5 mm
(18-24 AWG) cable
Voltages
Single Ended
Logic High Voltage 4 VDC minimum (approximately)
Logic Low Voltage 1 VDC maximum (approximately)
Differential
Transmit ±5 VDC
Receive ±0.2 VDC
Data Transmission 1 Start Bit (low level)
8 Data Bits (least significant bit first)
1 Stop Bit (high level)
Isolation Isolated from 24 VAC, BOs, and N2 Bus
Note: Do not share the Zone Bus common wire with any other
sensor or transmitter, as doing so can cause the VMA to misread the
sensor value, resulting in poor control.
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 15
CablePRO
CablePRO (AS-CBLPRO) is an interface device that is used between a
computer or Palm™ compatible handheld device and the VMA. Use
CablePRO for box balancing or commissioning via the Zone Bus
communication port on the room sensor.
When used with a VMA, the CablePRO is strictly an electrical
interface between the serial RS-232 port of the computer and the
VMA. CablePRO operates on 15 VDC drawn from a VMA and
provided through the Zone Bus. The data rate on both the RS-232 and
the Zone Bus is 1200 baud.
The VMA connects to the RS-232 COM port of the computer via a
DB9 or DB25 connector supplied with the CablePRO.
The diagnostic LEDs on the CablePRO indicate normal Zone Bus
communications. The LEDs flash only when the VMA is transmitting
or receiving data.
Refer to the Auxiliary Gear Technical Bulletin (LIT-6363080) for
more information on the CablePRO.
CVTPRO
CVTPRO (AS-CVTPROx00-x) is a Zone Bus/N2 Bus interface device
that is used between a computer or Palm compatible handheld device
and the VMA. Use CVTPRO for box balancing or commissioning via
the Zone Bus communication port.
When used with a VMA, the CVTPRO is strictly an electrical interface
between the serial RS-232 port of the Palm compatible handheld
device and the Zone Bus. CVTPRO operates on 15 VDC, drawn from
a VMA through the Zone Bus phone jack. The data rate on both the
RS-232 and the Zone Bus is 1200 baud.
Refer to the Auxiliary Gear Technical Bulletin (LIT-6363080) for
more information on the CVTPRO. For additional information on
installing the AS-CVTPRO300-1 and ASCVTPRO400-1, refer to the
AS-CVTPRO300-1 and AS-CVTPRO400-1 Zone Bus/N2 Bus Interface
Converters Installation Instructions (Part No. 24-10158-0).
16 VMA1400 Series Overview and Engineering Guidelines Technical Bulletin
Related Documentation
Table 5 lists related VMA documentation.
Table 5: Related Documentation
For Information on This Use This Document:
Sales and Marketing Information Variable Air Volume Modular Assembly (VMA) 1400 Series Product
Bulletin (LIT-635058)
Downloading and HVAC PRO User’s Guide
Commissioning Details
N30 Networking N30 Supervisory Controller Networking Technical Bulletin
(LIT-6891300)
Original Equipment Manufacturer Appendix B: VAV Controller Flow Calculation Constants Application
(OEM) Issues Note (LIT-6375185)
Configuration Choice Variable Air Volume Modular Assembly (VMA) 1400 Series Application
Note (LIT-6375125)
Using VMA Balancing Tool (VBT) Using the VMA1400 Balancing Tool (VBT) Software Technical Bulletin
Software (LIT-6363092)
Connecting Using CablePRO or Auxiliary Gear Technical Bulletin (LIT-6363080)
CVTPRO
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 17
Application Examples
Note: The examples in this document do not reflect all of the
possible questions and answers. These examples provide a basic
overview of wiring locations you might expect to see. They do not
define all available applications.
Single Duct Application Example 1
Table 6: Single Duct Example 1 Questions
HVAC PRO Software Questions Configuration Selections
VAV Box Type Pressure Independent, Single Duct
Fan Type (R2) Series/On-Off
Baseboard Heat Type None
Box Heat Type (R3 and R4) 2-stages
Lighting (R1) Start Stop Output (as shown in Figure 4)
R4
R3
H
Plenum T
G
Discharge
Supply
DPT1 DA1 R2
C1
R1 TE1
Sample1
Figure 3: Single Duct Example 1 Mechanical Flow Diagram
Table 7: Single Duct Example 1 Bill of Materials
Component Description Part Number
C1, DPT1, DA1 VMA AP-VMA1420-0
TE1 Temperature Sensor and Setpoint TE-6700 Series
R1 Lighting Relay GE-RR7
R2 Fan *
R3, R4 Reheat Relays *
* Box OEM manufacturers typically furnish fan relays and electric heat relays.
CW 18
End Stop HI
Coupler Bolt
(Red)
Set Screw
Coupler
LO
CCW
End Pneumatic Tubing
Stop
(differential pressure)
NEC Code if
More Than
Power 150 VAC
Transformer Primary
(1) 24 VAC (18) BI-1
(2) 24 VAC (19) COM
Primary 24 VAC (3) Earth Gnd. (20) BI-2
(Optional) (21) COM
24 VAC
(4) BO-1* (22) BI-3
Fan Relay R2
(5) BCOM* (23) COM
24 VAC
(6) BO-2* (24) +15 VDC*
Stage 1 Relay R3 (25) +15 VDC
(7) BCOM*
24 VAC (8) BO3* (26) AI-1
Stage 2 Relay R4 (9) BCOM* (27) COM
On (10) BO-4* (28) AI-2
Lighting Relay R1 Off (11) BCOM* (29) COM
(12) BO-5* (30) AI-3* 1 4
(13) BCOM* (31) COM* 8 5
(14) AO-1* (32) AI-4*
(15) COM* (33) COM*
(16) AO-2* SH REF N2 N2 (34) ZB+
LD - +
LED Visual Action (17) COM* (35) ZB-
TE-6700**
Response
Flashes at During initialization
1 second rate
Irregular flashing After communications *Included on VMA1420/1430 only
4 times per established ** Preferred DIP Switch
Figure 4: Single Duct Fan-Powered Box Example 1
ON
second Position for TE-6700
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin
Rapid flashing Needs code download 1 2 3
20 times
per second
Not lit No power or
+15 V shorted Optional N2 Shield Single example 1
To Next To NCM
N2 Device N2 Bus
24-18 AWG
VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 19
Single Duct Application Example 2
Table 8 illustrates the selections made through HVAC PRO software
for this example.
Table 8: Example 2 Questions
HVAC PRO Software Questions Configuration Selections
Control Strategy Pressure Independent, Single Duct
Supply Damper Actuator (DA1) Floating/3-wire
Fan Type (R) Parallel Fan Temperature Controlled
Baseboard Heat Type (VA2) Analog Output Valve
Box Heat Type (VA1) Floating/3-wire
Warmup Initiation Supply Air Temp Via a Hardware Input
Lighting Integration No
R
Plenum
H Discharge
Supply T
G
TE2 DPT1 DA1 VA1
B
A
C1
S
VA2
E
B
TE1 D
Sample3
Figure 5: Single Duct Example 2 Mechanical Flow Diagram
Table 9: Single Duct Example 2 Bill of Materials
Component Description Part Number
C1, DPT1 VMA AS-VMA1430-0
DA1 Damper Actuator Integrated with VAV box
TE1 Zone Temperature Sensor TMZ1600
TE2 Supply Air Temperature Sensor TE-6311P-1
VA1 Valve Actuator Box Heat VA-8020-1
VA2 Baseboard Heat Valve Actuator VA-8052
R Fan *
* Box OEM manufacturers typically furnish fan relays and electric heat relays.
HI 20
(Red)
LO
Pneumatic Tubing
(differential pressure)
NEC Code if
More Than
Power 150 VAC TMZ1600
Transformer Primary Wiring*
(1) 24 VAC (18) BI-1
(2) 24 VAC (19) COM
Primary 24 VAC (20) BI-2
(3) Earth Gnd.
(Not Used) (21) COM
Damper (4) BO-1 (22) BI-3
DA1 (23) COM 6
Actuator (5) BCOM
(6) BO-2 (24) +15 VDC 5
(7) BCOM (25) +15 VDC
Fan R
(8) BO3 (26) AI-1 3
(9) BCOM (27) COM
Box (10) BO-4 (28) AI-2
VA1 (11) BCOM (29) COM
Heat
COM (30) AI-3
24 VAC (12) BO-5
(13) BCOM (31) COM
(14) AO-1 (32) AI-4
(33) COM TE2
(15) COM
Baseboard + (16) AO-2 (34) ZB+
VA2 SH N2 N2
8
Heat (17) COM LD REF - + (35) ZB-
COM
LED Visual Response Action
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