Carrier VVT Bypass II Installation manual

V
VV VT T B By yp pa as ss s I II I C Co on nt tr ro ol ll le er r
I
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 ©2019
A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-601-01 · 1/25/2019

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 ©2019. 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 II?......................................................................................................................................1
Specifications ........................................................................................................................................................3
Safety Considerations ..........................................................................................................................................5
Installing the VVT Bypass II......................................................................................................................................... 6
Field-supplied hardware ......................................................................................................................................6
Mounting the VVT Bypass II.................................................................................................................................7
To mount the controller and actuator .................................................................................................. 7
Wiring the VVT Bypass II for power ................................................................................................................. 12
To wire the controller for power..........................................................................................................13
Addressing the VVT Bypass II........................................................................................................................... 14
Wiring for communications.............................................................................................................................. 14
Wiring specifications for BACnet MS/TP and ARC156......................................................................14
To wire the controller to the BACnet network ....................................................................................15
Wiring inputs and outputs ................................................................................................................................ 16
Wiring a Duct Air Temperature sensor to an input ............................................................................16
Wiring field-supplied actuators to the analog output........................................................................17
Wiring and mounting the Equipment Touch to the Rnet port...........................................................20
Wiring the TruVu™ ET Display to the Rnet port .................................................................................21
Start-up.......................................................................................................................................................................22
Configuring the VVT Bypass II's properties .................................................................................................... 22
Performing system checkout........................................................................................................................... 23
Bypass damper....................................................................................................................................23
Variable frequency drive (VFD) ...........................................................................................................24
Sequence of operation..............................................................................................................................................26
Duct static pressure control............................................................................................................................. 26
LAT monitoring and limiting............................................................................................................................. 26
Equipment fan off detection ............................................................................................................................ 27
Supply Air Temperature Alarm ........................................................................................................................ 27
Airside linkage.................................................................................................................................................... 27
Air source mode determination....................................................................................................................... 28
To adjust the driver properties..................................................................................................................................29
Driver ................................................................................................................................................................... 29
Device .................................................................................................................................................................. 30
Notification Classes........................................................................................................................................... 31
Calendars ............................................................................................................................................................ 32
Common Alarms ................................................................................................................................................ 32
Specific Events ................................................................................................................................................... 33
Switches, Jumpers, Options ............................................................................................................................. 33
Flow Calibration Archive ................................................................................................................................... 33
Act Net Network Details ................................................................................................................................... 34
Troubleshooting .........................................................................................................................................................35
LED's .................................................................................................................................................................... 35
To get the serial number .................................................................................................................................. 36
To restore factory defaults ............................................................................................................................... 36
To replace the battery....................................................................................................................................... 37
To clean the airflow sensor orifice .................................................................................................................. 37
Compliance ................................................................................................................................................................39
FCC Compliance................................................................................................................................................. 39
CE Compliance ................................................................................................................................................... 39
BACnet Compliance........................................................................................................................................... 39

Contents
Appendix A: VVT Bypass II Points/Properties.........................................................................................................40
Status................................................................................................................................................................... 40
Unit Configuration.............................................................................................................................................. 40
Maintenance....................................................................................................................................................... 42
Alarms ................................................................................................................................................................. 43
Linkage................................................................................................................................................................ 43
I/O Points............................................................................................................................................................ 44
Appendix B: BACnet points list ................................................................................................................................45
Document revision history ........................................................................................................................................46

VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
1
What is a VVT Bypass II?
The VVT Bypass II (#OPN-VVTBP-02), 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 damper actuator provides 45 in/lbs (5 Nm) of torque. If the actuator's torque is insufficient,
the VVT Bypass II 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 II 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.
You can disconnect the actuator from the controller and mount them separately, connecting them with just the
actuator cable or using an additional extension cable, up to a maximum distance of 300 feet.
The following illustration shows the VVT Bypass II in a typical i-Vu® Control System.
Introduction

Introduction
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Installation and Start-up Guide All rights reserved
2
NOTE
This document gives instructions for field-installation of a VVT Bypass II in an i-Vu® Control System.

Introduction
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Installation and Start-up Guide All rights reserved
3
Specifications
Driver drv_bpopn02
Power 24 Vac ±10%, 50–60 Hz
14 VA power consumption
26 Vdc (25 V min, 28.8 V max)
Single Class 2 source only, 100 VA or less
Actuator Belimo brushless DC motor, torque 45 inch-pounds (5 Nm), runtime 154 seconds
Act Net port To connect the actuator cable and the VVT Bypass II
BACnet port For communication with the controller network using BACnet ARC156 (156 kbps)
or BACnet MS/TP (9600 bps – 76.8 kbps)
Rnet port You can connect:
One Equipment Touch, using an external 24 Vac power supply
or
One TruVu™ ET Display, using an external 24 Vdc power supply
Local Access port For system start-up and troubleshooting
Input 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 differential pressure sensor 0–2 in. H2O, sensitive down to ±0.001 in.
H2O. Barbed tapered airflow connections accept 3/16 in. (4.75 mm) I.D. tubing.
Allows for readings across the 0–2 in. H2O range, accurate to ±5% of full flow at 2
in. H2O.
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 Built-in surge and transient protection for power and communications in
compliance with EN61000-6-1.
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.
CAUTION
To protect against large electrical surges on serial EIA-485
networks, place a PROT485 at each place wire enters or exits the building.
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.

Introduction
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Installation and Start-up Guide All rights reserved
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Status indicators LEDs indicate status of communications, running, errors, power, and digital
outputs
Environmental operating
range
32 to 130°F (0 to 54.4°C), 10–90% 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)
Controller and actuator
overall dimensions
Width:
Height:
8.9 in. (22.7 cm)
5.9 in. (15.0 cm)
Controller and actuator
mounting dimensions
7.1 in. (18.0 cm) from left side controller mounting hole centerline to actuator
mounting hole centerline
Controller overall
dimensions
Width:
Height:
Depth:
6.4 in. (16.3 cm)
5.7 in. (14.5 cm)
2.1 in. (5.3 cm)
Controller mounting
dimensions
5.3 in. (13.4 cm) from left side controller mounting hole centerline to right side
controller mounting hole centerline
Actuator overall dimensions Width:
Height:
Depth:
3.0 in. (7.6 cm)
5.9 in. (15.0 cm)
2.5 in. (6.4 cm)
Actuator mounting
dimensions
4.4 in. (11.2 cm) from shaft centerline to actuator mounting hole centerline
Panel depth 2.5 in. (6.4 cm) minimum
Shaft dimensions Minimum shaft diameter: .25 in. (.64 cm)
Maximum shaft diameter: .63 in. (1.59 cm)
Minimum shaft length: 1.75 in. (4.45 cm)
Weight 1.8 lbs (0.82 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 B, CE

Introduction
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Installation and Start-up Guide All rights reserved
5
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.
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 II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
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To install the VVT Bypass II:
1 Mount the controller (page 7).
2 Wire the controller for power (page 12).
3 Set the controller's address (page 14).
4 Wire the controller to the BACnet MS/TP or BACnet ARC156 network (page 14).
5 Wire the inputs and outputs (page 16).
Field-supplied hardware
Each VVT Bypass II 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, 40VA
•wiring
Installing the VVT Bypass II

Installing the VVT Bypass II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
7
Mounting the VVT Bypass II
Mount the VVT Bypass II 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.
To mount the controller and actuator
To disconnect and mount the controller and actuator separately

Installing the VVT Bypass II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
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Disconnect the actuator from the controller by inserting a screw driver in the slot on the back of the VVT Bypass II
and pressing the tab. The actuator cable or an attached extension cable must connect to the controller's
Act Net
port.
1 Turn the damper shaft to fully close the damper.
2 Mount the controller to the VVT terminal by sliding the clamp assembly onto the damper shaft.

Installing the VVT Bypass II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
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NOTE
For service access, allow at least 1 foot (.3 m) of clearance between the front of the controller and
adjacent surfaces.
3 Secure the controller and the actuator by installing the screws, anti-rotation slot's bushings, and o-rings that
are supplied with the VVT Bypass II.
O-ring Bushing
Anti-rotation slot
NOTES
○Center the bushing in the slot. Failure to do so may cause the actuator to stick or bind.
○The VVT Bypass II must be secured, but loose enough to allow movement. of the damper shaft.

Installing the VVT Bypass II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
10
CAUTIONS
○You
must
use the screws, anti-rotation slot's bushings, and o-rings that are shipped with the VVT Bypass
II.
○Overtightening the screws so that the controller and actuator cannot move may damage the unit.
4 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.
5 Release the button.
6 Tighten the actuator clamp to the damper shaft by tightening the two M5 nuts.

Installing the VVT Bypass II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
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7 Hold down the actuator 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.
8 Hold down the actuator damper release button, rotate the damper to verify that it fully opens and closes, then
release the button.
9
10 Connect the tube provided to the controller's
High
connector. Using 1/4" poly tubing, connect the other end
to a duct static pressure probe (for example, Dwyer Instruments part #A-491, or the equivalent, for a 6”
length probe) located in the supply air duct downstream of the bypass damper, but before the first branching
of ductwork.
NOTE
Tubing should be at least 2 ft. (.61 meters) long for stable airflow measurement. The combined high
and low tubing length should not exceed 16.4 ft. (5 meters) in order to ensure accurate measurements.

Installing the VVT Bypass II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
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11 Connect the controller's
Low
connector to open space for plenum return or to a room space if using ducted
return.
Wiring the VVT Bypass II for power
WARNING
Do not apply line voltage (mains voltage) to the controller's ports and terminals.
CAUTIONS
•The VVT Bypass II 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.

Installing the VVT Bypass II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
13
To wire the controller for power
1 To access the screw terminal connectors, lift up the controller's cover by pulling the tabs located on both
sides of the controller's left mounting bracket.
2 Remove power from the power supply.
3 Pull the screw terminal connector from the controller's power terminals labeled
Gnd
and
24 Vac
.
4 Connect the transformer wires to the screw terminal connector.
5 Apply power to the power supply.
6 Measure the voltage at the VVT Bypass II’s power input terminals to verify that the voltage is within the
operating range of 21.6–26.4 Vac.
7 Connect a 4-inch (10.2 cm) wire from
Gnd
to the control panel.
8 Insert the screw terminal connector into the VVT Bypass II's power terminals.
9 Verify that the
Power
LED is on and the
Run
LED is blinking.

Installing the VVT Bypass II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
14
Addressing the VVT Bypass II
You must give the VVT Bypass II an address that is unique on the network. You can address the VVT Bypass II
before or after you wire it for power.
1 If the VVT Bypass II 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
II.
Wiring for communications
The VVT Bypass II 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.
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.

Installing the VVT Bypass II
VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
15
To wire the controller to the BACnet network
WARNING
Attaching any ARCNET or MS/TP network to the
Act Net
port damages BT485s, DIAG485s, or
terminating resistors on that 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
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 II is at either end of a network segment, connect a BT485 to the VVT Bypass II.
6 Insert the power screw terminal connector into the VVT Bypass II's power terminals.
7 Verify communication with the network by viewing a Module Status report in the i-Vu® interface.

VVT Bypass II Controller CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
16
Wiring inputs and outputs
WARNING
Disconnect electrical power to the VVT Bypass II 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 II 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 II. 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)