Carrier VVT Bypass Installation manual

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VV VT T B By yp pa as ss s C Co on nt tr ro ol ll le er r
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In ns st ta al ll la at ti io on n a an nd d S St ta ar rt t- -u up p G Gu ui id de e
CARRIER CORPORATION ©2017
A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-436-01 · 2/7/2017

Verify that you have the most current version of this document from
www.hvacpartners.com
or your local Carrier
office.
Important changes are listed in
Document revision history
at the end of this document.
CARRIER CORPORATION ©2017. All rights reserved throughout the world. i-Vu is a registered trademark of Carrier
Corporation. All other trademarks are the property of their respective owners.

Contents
Introduction.................................................................................................................................................................. 1
What is a VVT Bypass Controller? ......................................................................................................................1
Specifications ........................................................................................................................................................3
Safety Considerations ..........................................................................................................................................4
Installing the VVT Bypass Controller .......................................................................................................................... 6
Field-supplied hardware ......................................................................................................................................6
Mounting the VVT Bypass Controller..................................................................................................................7
To mount the controller ........................................................................................................................ 7
Wiring the VVT Bypass Controller for power.....................................................................................................9
To wire the controller for power............................................................................................................ 9
Addressing the VVT Bypass Controller............................................................................................................ 10
Wiring for communications.............................................................................................................................. 10
Wiring specifications for BACnet MS/TP and ARC156......................................................................11
To wire the controller to the BACnet network ....................................................................................11
Wiring inputs and outputs ................................................................................................................................ 12
Wiring a Duct Air Temperature sensor to an input ............................................................................12
Wiring field-supplied actuators to the analog output........................................................................13
Wiring and mounting the Equipment Touch ......................................................................................15
Start-up.......................................................................................................................................................................17
Configuring the VVT Bypass Controller's properties ..................................................................................... 17
Performing system checkout........................................................................................................................... 18
Bypass damper....................................................................................................................................18
Variable frequency drive (VFD) ...........................................................................................................19
Sequence of operation..............................................................................................................................................21
Duct static pressure control............................................................................................................................. 21
LAT monitoring and limiting............................................................................................................................. 21
Equipment fan off detection ............................................................................................................................ 22
Supply Air Temperature Alarm ........................................................................................................................ 22
Airside linkage.................................................................................................................................................... 22
Air source mode determination....................................................................................................................... 23
Troubleshooting .........................................................................................................................................................24
LED's .................................................................................................................................................................... 24
To get the serial number .................................................................................................................................. 25
To restore factory defaults ............................................................................................................................... 25
To replace the controller's battery .................................................................................................................. 26
To clean the airflow sensor orifice and replace the filter............................................................................ 26
Compliance ................................................................................................................................................................28
FCC Compliance................................................................................................................................................. 28
CE Compliance ................................................................................................................................................... 28
BACnet Compliance........................................................................................................................................... 28
Appendix A: VVT Bypass Controller Points/Properties ..........................................................................................29
Status................................................................................................................................................................... 29
Unit Configuration.............................................................................................................................................. 29
Maintenance....................................................................................................................................................... 31
Alarms ................................................................................................................................................................. 32
Linkage................................................................................................................................................................ 32
I/O Points............................................................................................................................................................ 32
Document revision history ........................................................................................................................................34

VVT Bypass Controller Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
Installation and Start-up Guide All rights reserved
1
What is a VVT Bypass Controller?
The VVT Bypass Controller (#OPN-VVTBP), a component of the i-Vu® Control System, regulates the supply duct
static pressure by controlling one of the following:
•The system's bypass damper
The controller's built-in damper actuator provides 35 in/lbs (4 Nm) of torque. If the built-in actuator's torque
is insufficient, the VVT Bypass Controller can be used to drive an external high-torque actuator. Or, the
controller can drive multiple external damper actuators.
•The air source supply fan's variable frequency drive (VFD)
NOTE
The VVT Bypass Controller controller is available in both English or Metric units. The metric version has (-M)
appended to the part number. Everything in this document applies to both versions.
The i-Vu Control System uses linkage to exchange data between the zone terminals and their air source to form a
coordinated HVAC system. The system's air source controller, zone controllers, and bypass controller are linked so
that their data exchange can be managed by one zone controller configured as the VVT Master.
The following illustration shows the VVT Bypass Controller in a typical i-Vu® Control System.
Introduction

Introduction
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2
NOTE
This document gives instructions for field-installation of a VVT Bypass Controller in an i-Vu® Control System.

Introduction
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Installation and Start-up Guide All rights reserved
3
Specifications
Driver drv_bpopen_x-xx-xxx
Power 24 Vac ±10%, 50–60 Hz
14 VA power consumption
26 Vdc (25 V min, 30 V max)
Single Class 2 source only, 100 VA or less
BACnet port For communication with the controller network using BACnet ARC156 (156 kbps)
or BACnet MS/TP (9600 bps – 76.8 kbps)
Rnet port For connecting an Equipment Touch
Local Access port For system start-up and troubleshooting
Inputs 1 input for connecting the Duct air temperature sensor (#33ZCSENDAT)
Input resolution 10 bit A/D
Analog output 1 analog output, 0–10 Vdc (5 mA max)
The controlled device must have a minimum of 2000 Ohms resistance measured
from its input to ground and must share the same ground as the controller.
Output resolution 8 bit D/A
Integral airflow sensor Precision low flow AWM series 0–2 in. H20 (0-.498 kPa), sensitive down to
±0.001 in. H20 (±.00025 kPa). Barbed tapered airflow connections accept 3/16
in. (4.75 mm) I.D. tubing. Allows for readings across the 0–2 in. H20 (0 - .498 kPa)
range, accurate to ±5% of full flow at 2 in. H20 (.498 kPa).
Integral actuator Brushless DC motor, torque 35 inch-pounds (4 Nm), runtime 205 seconds for 90
degree travel during control, or 25 seconds in high-speed test and balance mode
Battery 10-year Lithium CR2032 battery retains the following data for a maximum of
10,000 hours during power outages: control programs, editable properties,
schedules, and trends.
Protection Incoming power and network connections are protected by non-replaceable
internal solid-state polyswitches that reset themselves when the condition that
causes a fault returns to normal.
The power, network, input, and output connections are also protected against
transient excess voltage/surge events lasting no more than 10 msec.
BT485 connector You attach a BT485 (not included) to a controller at the beginning and end of a
network segment to add bias and to terminate a network segment.
Status indicators LED's indicate status of communications, running, errors, power, and digital
outputs
Environmental operating
range
0 to 130°F (-18 to 54°C), 0 to 90% relative humidity, non-condensing
Storage temperature range -24 to 140°F (-30 to 60°C), 0 to 90% relative humidity, non-condensing
Physical UL94-5VA plenum rated enclosure for installation in plenum (or other space for
environmental air) in accordance with NEC Section 300.22 (c) and (d)

Introduction
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Overall dimensions A:
B:
C:
7 in. (17.8 cm)
6-1/32 (15.4 cm)
6 in. (15.24 cm)
Mounting dimensions D:
E:
F:
G:
H:
5-5/8 in. (14.3 cm)
4-9/16 in. (24.3 cm)
1-5/16 in. (3.3 cm.)
7/8 in. (2.2 cm)
1-5/16 in. (3.3 cm)
Panel depth 2-1/2 in. (6.4 cm) minimum
Shaft dimension Minimum shaft diameter: 3/8 in. (.95 cm.)
Maximum shaft diameter: 1/2 in. (1.27 cm)
Minimum shaft length: 1 3/4 in. (4.45 cm)
Weight 1.7 lbs (0.77 kg)
BACnet support Conforms to the BACnet Advanced Application Controller (B-AAC) Standard Device
Profile as defined in ANSI/ASHRAE Standard 135-2012 (BACnet) Annex L,
Protocol Revision 9
Listed by UL-916 (PAZX), cUL-916 (PAZX7), FCC Part 15-Subpart B-Class A, CE
Safety Considerations
CAUTION
Air conditioning equipment will provide safe and reliable service when operated within design specifications. The
equipment should be operated and serviced only by authorized personnel who have a thorough knowledge of
system operation, safety devices, and emergency procedures.
Good judgment should be used in applying any manufacturer's instructions to avoid injury to personnel or damage
to equipment and property.

Introduction
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WARNING Electrical Shock Hazard
Failure to follow this warning could cause personal injury, death, and/or equipment damage.
Disconnect all power to the unit before performing maintenance or service. Unit may automatically start if power is
not disconnected.
WARNING
Follow all local, state, and federal laws regarding disposal of equipment containing hazardous
materials such as mercury contactors.

Installing the VVT Bypass Controller
VVT Bypass Controller Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
Installation and Start-up Guide All rights reserved
6
Bypass
damper
Bypass
controller
w/actuator
Transformer
Supply
air
Duct
temperature
sensor
Low pressure
open to space Power
supply
To communication
bus
High pressure
tubing
To
building Duct static
pressure probe
To install the VVT Bypass Controller:
1 Mount the controller (page 7).
2 Wire the controller for power (page 9).
3 Set the controller's address (page 10).
4 Wire the controller to the BACnet MS/TP or BACnet ARC156 network (page 10).
5 Wire the inputs and outputs (page 12).
Field-supplied hardware
Each VVT Bypass Controller installation requires the following field-supplied components:
•damper
•damper actuator (if high-torque actuator or slaved dampers are required)
•duct air temperature sensor
•transformer— 24 Vac, 40 Va
•wiring
Installing the VVT Bypass Controller

Installing the VVT Bypass Controller
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7
Mounting the VVT Bypass Controller
Mount the VVT Bypass Controller on the bypass duct damper actuator shaft. For service access, allow at least 1
foot (.3 m) of clearance between the front of the controller and adjacent surfaces.
End view inlet
Controller
Allow 1 ft. (.3 m) clearance
for service access
2.5 in.
(6.35
cm)
To mount the controller
1 Turn the damper shaft to fully close the damper.
2 Remove the controller’s cover.
3 Mount the controller to the VVT box by sliding the clamp assembly onto the damper shaft.
4 Secure the controller by installing the screw provided through the anti-rotation slot's bushing and o-ring.
O-ring Bushing
Anti-rotation slot
NOTE
Center the bushing in the slot. Failure to do so may cause the actuator to stick or bind.

Installing the VVT Bypass Controller
VVT Bypass Controller Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
Installation and Start-up Guide All rights reserved
8
5 Hold down the controller’s damper release button and rotate the actuator clamp in the same direction that
closed the damper. Rotate the clamp until it stops, then rotate it back one notch.
6 Release the button.
7 Tighten the actuator clamp to the damper shaft by tightening the two M5 nuts.
8 Hold down the damper release button and rotate the damper from fully closed to fully open. If the damper
traveled less than 90 degrees, do the following to set the actuator's fully open position:
a) Loosen the appropriate stop clamp screw. See figure below.
b) Move the stop clamp until it contacts the
edge of the actuator cam.
c) Tighten the screw.
Move stop
clamp if
necessary
9 Hold down the damper release button, rotate the damper to verify that it fully opens and closes, then release
the button.
10 Connect the filter tube provided to the controller's
High
connector. See figure below. Using 1/4" poly tubing,
connect the other end to a duct static pressure probe (part #39EK20462) located in the supply air duct
downstream of the bypass damper, but before the first branching of ductwork. See diagram in Installation
(page 6).
NOTE
Tubing should be at least 2 feet long for stable airflow measurement.
11 Leave the controller's
Low
connector open for plenum return or to a room space if using ducted return.

Installing the VVT Bypass Controller
VVT Bypass Controller Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
Installation and Start-up Guide All rights reserved
9
High
Low
Tube installation
12 Replace the controller’s cover.
Wiring the VVT Bypass Controller for power
WARNING
Do not apply line voltage (mains voltage) to the controller's ports and terminals.
CAUTIONS
•The VVT Bypass Controller is powered by a Class 2 power source. Take appropriate isolation measures when
mounting it in a control panel where non-Class 2 circuits are present.
•Carrier controllers can share a power supply as long as you:
•Maintain the same polarity.
○Use the power supply only for Carrier controllers.
To wire the controller for power
1 Remove power from the power supply.
2 Pull the screw terminal connector from the controller's power terminals labeled
Gnd
and
24 Vac
or
Hot
.
3 Connect the transformer wires to the screw terminal connector.

Installing the VVT Bypass Controller
VVT Bypass Controller Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
Installation and Start-up Guide All rights reserved
10
4 Apply power to the power supply.
5 Measure the voltage at the VVT Bypass Controller’s power input terminals to verify that the voltage is within
the operating range of 21.6–26.4 Vac.
6 Connect a 4-inch (10.2 cm) wire from
Gnd
to earth ground.
7 Insert the screw terminal connector into the VVT Bypass Controller's power terminals.
8 Verify that the
Power
LED is on and the
Run
LED is blinking.
Addressing the VVT Bypass Controller
You must give the VVT Bypass Controller an address that is unique on the network. You can address the VVT
Bypass Controller before or after you wire it for power.
1 If the VVT Bypass Controller has been wired for power, pull the screw terminal connector from the controller's
power terminals labeled
Gnd
and
24 Vac
. The controller reads the address each time you apply power to it.
2 Using the rotary switches, set the controller's address. Set the
Tens
(
10's
) switch to the tens digit of the
address, and set the
Ones
(
1's
) switch to the ones digit.
EXAMPLE
If the controller’s address is 25, point the arrow on the
Tens
(
10's
) switch to 2 and the arrow on
the
Ones
(
1's
) switch to 5.
10's
1's
1
3
4
5
2
7
8
9
6
0
1
3
4
5
2
7
8
9
6
0
CAUTION
The factory default setting is
00
and must be changed to successfully install your VVT Bypass
Controller.
Wiring for communications
The VVT Bypass Controller communicates using BACnet on the following types of network segments:
•MS/TP communicating at 9600 bps, 19.2 kbps, 38.4 kbps, or 76.8 kbps
•ARC156 communicating at 156 kbps
NOTE
For more networking details, see the Open Controller Network Wiring Installation Guide.

Installing the VVT Bypass Controller
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Wiring specifications for BACnet MS/TP and ARC156
Cable: 22 AWG or 24 AWG, low-capacitance, twisted, stranded, shielded copper wire
Maximum length: 2000 feet (610 meters)
WARNING
Do not apply line voltage (mains voltage) to the controller's ports and terminals.
To wire the controller to the BACnet network
1 Pull the screw terminal connector from the controller's power terminals labeled
Gnd
and
24 Vac
.
2 Check the communications wiring for shorts and grounds.
3 Connect the communications wiring to the controller’s screw terminals labeled
Net +
,
Net -
, and
Shield
.
NOTE
Use the same polarity throughout the network segment.
4 Set the communication type and baud rate.
For...
Set BACnet ARC156 or MS/TP
jumper to...
Set DIP switches 1 and 2 to...
ARC156
ARC156
N/A. Baud rate will be 156 kbps regardless of the
DIP switch settings.
MS/TP
MS/TP
The appropriate baud rate. See the
BACnet
MS/TP
Baud
diagram on the controller.
NOTE
Use the same baud rate for all controllers on the network segment.
5 If the VVT Bypass Controller is at either end of a network segment, connect a BT485 to the VVT Bypass
Controller.
6 Insert the power screw terminal connector into the VVT Bypass Controller's power terminals.
7 Verify communication with the network by viewing a Module Status report in the WebCTRL® interface.

VVT Bypass Controller Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
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Wiring inputs and outputs
WARNING
Disconnect electrical power to the VVT Bypass Controller before wiring it. Failure to follow
this warning could cause electrical shock, personal injury, or damage to the controller.
CAUTION
•Do not run sensor or relay wires in the same conduit or raceway with Class 1 AC or DC service wiring.
•Do not abrade, cut, or nick the outer jacket of the cable.
•Do not pull or draw cable with a force that may harm the physical or electrical properties.
•Avoid splices in any control wiring.
Wiring a Duct Air Temperature sensor to an input
Part #33ZCSENDAT
The VVT Bypass Controller must be connected to a Duct Air Temperature (DAT) sensor that monitors the
temperature of the air delivered by the air source.
NOTE
This document gives instructions for wiring the sensor to the VVT Bypass Controller. For mounting and
wiring the sensor, see the Carrier Sensors Installation Guide.
Wiring specifications
Cable from sensor to controller: If <100 ft (30.5 meters) 22 AWG, unshielded
If >100 ft (30.5 meters) 22 AWG, shielded
Maximum length: 500 feet (152 meters)

Installing the VVT Bypass Controller
VVT Bypass Controller Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
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13
To wire and mount the DAT sensor
1 Wire the sensor to the controller. See diagram below.
NOTE
Sensor wiring does not have polarity. The wires can be connected to either terminal.
2 Using electrical tape, insulate any exposed wire to prevent shorting.
Wiring field-supplied actuators to the analog output
You can wire a high-torque actuator or parallel actuators to the controller's 0–10 Vdc analog output.
NOTE
You cannot use the VVT Bypass Controller's built-in actuator if wiring external actuator(s) to the analog
output.
High-torque actuators
You can wire one of the following Belimo actuators to the VVT Bypass Controller's analog output instead of
using the controller's built-in, 35 in.-lb (4 Nm) actuator.
NMX24-MFT P-10028 90 in.-lb (10 Nm) actuator with 0–10 Vdc control and 0–10 Vdc
feedback
AMX24-MFT P-10028 180 in.-lb (20 Nm) actuator with 0–10 Vdc control and 0–10 Vdc
feedback
1 Install the actuator according to the manufacturer's instructions.
2 Wire the actuator to the controller using the diagram below.

Installing the VVT Bypass Controller
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Installation and Start-up Guide All rights reserved
14
NOTE
For proper operation and to prevent damage to the devices, use the same polarity for the actuator's
power and the VVT Bypass Controller's power.
Linked actuators
You can wire up to 4 of the following Belimo actuators to the VVT Bypass Controller's analog output. Link
actuators whose travel times and other parameters coincide.
LMX24-MFT P-10028 45 in.-lb (5 Nm) actuator with 0–10 Vdc control
NMX24-MFT P-10028 90 in.-lb (10 Nm) actuator with 0–10 Vdc control
AMX24-MFT P-10028 180 in.-lb (20 Nm) actuator with 0–10 Vdc control
1 Install the actuators according to the manufacturer's instructions.
2 Wire the actuators to the controller using the diagram below.
3 Set the direction rotation switch on each actuator to CW.

Installing the VVT Bypass Controller
VVT Bypass Controller Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
Installation and Start-up Guide All rights reserved
15
NOTE
Maintain polarity if using the same power supply for more than one actuator.
Wiring and mounting the Equipment Touch
CAUTION
If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
See the Equipment Touch Installation and Setup Guide for more details.
Mounting
The Equipment Touch must be mounted within the building interior. You can mount the Equipment Touch:
•In a panel with the controller or on the panel door
•On a wall up to 500 feet from the controller

Installing the VVT Bypass Controller
VVT Bypass Controller Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
Installation and Start-up Guide All rights reserved
16
Wiring
•The Equipment Touch requires a 24 Vac power supply. It is not powered by the Rnet.
CAUTION
The Equipment Touch can share a power supply with the Carrier controller as long as you:
○Maintain the same polarity.
○User the power supply only for Carrier controllers.
•You can also wire an external 10 kOhm, Type II thermistor (Carrier part number 33ZCT55SPT) to the
Equipment Touch.
Wire the Equipment Touch directly to the controller's Rnet port as shown below.
1 Turn off the VVT Bypass Controller's power.
2 Partially cut, then bend and pull off the outer jacket of the cable. Do not nick the inner insulation.
3 Strip about .25 inch (.6 cm) of the inner insulation from each wire.
4 Wire the VVT Bypass Controller's
Rnet+
and
Rnet-
terminals to the terminals of the same name on the
Equipment Touch's connector.
NOTE
If using shielded wire, connect the shield wire and the ground wire to the
Gnd
terminal.
5 Turn on the VVT Bypass Controller's power.
6 Turn on the Equipment Touch.
NOTE
You do not need to set an address for the Equipment Touch.