ABB ACS320 series Owner's manual

MODEL SHOWN: ACS 320
VFD KEYPADS IN E-BOX
SUPPLEMENTAL
MANUAL
FACTORY-INSTALLED
ABB VARIABLE FREQUENCY
DRIVES (VFD)
IN RENEWAIRE
(ERV) VENTILATORS
RENEWAIRE.COM
TABLE OF CONTENTS
Product info ............................ 2
Installation........................... 3-9
Operation......................... 10-16
VFD KEYPADS IN E
-
BOX

ABB VARIABLE FREQUENCY DRIVES
RENEWAIRE.COM ABB VFD SUPPLEMENTAL MANUAL 1.800.627.44992
PLANNING
YOUR INSTALLATION
ABOUT ABB VFDS
PRODUCT INFO
ABB ACS320 VFDs are generally supplied in indoor ERVs and ABB ACS355+N831 VFDs in roof top ERVs.
Both models have built in BACnet®building communication protocol and the ACS355+N831 also has
low ambient firmware that extends the lower starting temperature limit to -25°F.
FOR COMPLETE ERV INSTALLATION YOU WILL ALSO NEED:
• Standard Installation and Operation Manual for the ERV – physical installation and duct connection,
maintenance procedures, etc.
• Supplemental Wiring Schematic Manual – complete unit wiring diagrams.
• User’s Manual ACS320 Drives or Users Manual ACS355 Drives – ABB’s user’s/installer’s manual.
More detailed information is available online in the Document Library at www.abb.com/drives.
1. Before servicing or cleaning the unit, switch
power off at disconnect switch or service panel
and lock-out/tag-out to prevent power from
being switched on accidentally. More than one
disconnect switch may be required to
de-energize the equipment for servicing.
2. This installation manual shows the suggested
installation method. Additional measures may
be required by local codes and standards.
3. Installation work and electrical wiring must be
done by qualified professional(s) in accordance
with all applicable codes, standards and
licensing requirements.
4. Any structural alterations necessary for
installation must comply with all applicable
building, health, and safety code requirements.
5. This unit must be grounded.
6. Use the unit only in the manner intended by the
manufacturer. If you have questions, contact
the manufacturer.
7. When cutting or drilling into unit, wall or
ceiling, do not damage electrical wiring and
other hidden utilities.
8. Do not re-wire the VFD(s) to control more than
one motor per VFD.
9. Do not operate the motors in this unit above
the motor’s rated full load amps (FLA) as
indicated on the unit’s nameplate.
RISK OF FIRE, ELECTRIC SHOCK, OR INJURY. OBSERVE ALL CODES AND THE FOLLOWING:
WARNING
NOTE: VFD(s) in this unit can be operated in many ways. This Manual provides only an outline of common methods.
DO NOT OPERATE VFD IN CONDITIONS OUTSIDE OF TEMPERATURE LIMITS. The manufacturer’s normal
ambient temperature limits forACS320VFDs are 14°F to 122°F. RenewAire has worked with the manufacturer
to implement low-ambient-start firmware for the ACS355+N831 that extends the lower temperature
limit for starting the VFD down to -25°F, which has been validated by manufacturer and RenewAire testing.
The manufacturer recommends that the VFD not be operated for prolonged periods at temperatures below
14°F to ensure longevity of the VFD. RenewAire commercial ERVs are VFD ready, in extreme climates
consider field installing VFDs in a climate controlled indoor electrical cabinet.
WARNING

ABB VARIABLE FREQUENCY DRIVES
31.800.627.4499 ABB VFD SUPPLEMENTAL MANUAL RENEWAIRE.COM
PLANNING YOUR
INSTALLATION
INSTALLATION
“ON” AND “SPEED” SIGNALS
VFD operation in this unit is dependent on two signals: an ON signal and a SPEED (or REFERENCE) signal.
The sources and types of these signals can vary. If the ERV is equipped with dampers the ON signal to the
VFD comes from the end switch on the damper. If the ERV is not equipped with dampers, the ON signal
comes from an external control connected directly to the VFD. When an ON signal is received by the VFD,
it starts the motor. The VFD then operates the blower at the speed established by the SPEED signal. The
SPEED signal is often provided by an external control, but in some applications “pre-set” speeds are set
inside the VFD and are selected by external switches or relays.
PRINCIPLES OF EXTERNAL CONTROL
This ERV can be operated by various external
control devices including remote switch or relay,
digital time clock with relay, occupancy sensor
with relay, and carbon dioxide sensor with relay
and analog output. These devices are commonly
known as 2-wire, 3-wire, and 4-wire devices.
A Building Management System (BMS) can control
this ERV through relay contacts and with 0-10vdc
or 4-20mA analog inputs.
The external control devices can be connected to
this ERV to operate each blower independently or
for one blower to act as leader and the other
blower to act as follower. In leader-follower
mode, a single external switch or relay calls for
operation and the leader VFD sets SPEED to internal
presets, or in response to an analog input signal.
The follower VFD then operates at either exactly
the same speed, at an offset above or below the
leader’s speed, or at a scaled speed.
The VFD’s are pre-programmed at the factory so
only a few parameters need change for a
specific installation.
CONNECTING EXTERNAL CONTROLS
If this ERV is equipped with damper(s), the ON signal is connected to the terminal strip in the electrical
enclosure (“E-box”). If this ERV is not equipped with damper(s), and has 2 VFDs, the ON signal is
connected directly to the VFDs. The SPEED signals are always connected directly to the VFD(s).
WIRE ROUTING
Route input power cables, motor cables and control
cables separately to decrease electromagnetic
interference caused by the rapid changes in
the drive output voltage. Where control cables
must cross power cables make sure that they
are arranged at an angle as near to 90 degrees
as possible. See the ABB VFD manual for more
detailed wire routing instructions.
Power cables and control cables can be brought
into the bottom of the electrical box attached to the
ERV unit or through the bottom of the unit itself.
There are plugged holes to run control wires and
power wires between the electrical box and the
unit interior, marked on the interior of the ERV unit
and another plugged hole in the unit compartment
divider to run wires to VFDs in the other airstream
compartment if needed.
In some configurations the VFD and/or VFD
protective guard may need to be removed to
access the control wire hole plug to run wires.
A label is located in the ERV on the left interior
wall indicating the power and control wire hole
plug locations. Bring wires out from the top or
bottom of the VFD mounting bracket and not
through the mounting bracket window when
routing wires if |the VFD is mounted over the
hole plug.
After the wires are run, apply caulk around the
wires at wire bushings used between the electrical
box and ERV unit and between compartments
in the unit to prevent air leakage between these
compartments.

ABB VARIABLE FREQUENCY DRIVES
RENEWAIRE.COM ABB VFD SUPPLEMENTAL MANUAL 1.800.627.44994
PLANNING YOUR
INSTALLATION
TECHNICAL SUPPORT
INSTALLATION
Each VFD has a keypad which is accessible at the
E-box while the unit is operating.
You can check the status of the VFD at the keypad,
and make changes to the VFD parameters at the
keypad. You can manually control the VFD from the
keypad during start-up and commissioning.
VFD is factory programmed to cover most needs
but some parameters will need to be set to interact
with the external control system.
Access the keypad(s) through the removable cover
to the E-box.
For questions about applications not covered in this manual, and for questions specific to the
ABB Drives, contact ABB Technical Support at 800-HELP-365 (800-435-7365).
A listing of ABB support and service contacts can be found on the Internet at www.abb.com/drives and
selecting Sales, Support and Service Network.
Softkey
“Auto”
“OFF” “Hand”
Softkey
Help Key
Up/Down Buttons
The function of each
Softkey changes
and is shown just
above the Softkey in
the display.
ABB KEY PAD BUTTONS
ABB manuals are available as PDFs at www.abb.com/drives; select Document Library.
Related ABB Manuals:
ACS320 User’s Manual 3AUA0000062599
ACS320 Short Form User’s Manual 3AUA0000086933
ACS355 User’s Manual 3AUA0000066143
ACS355 HVAC with BACnet (+N831) Supplement 3AXD50000024172
FMBA-01 Modbus Adapter Module User’s Manual 3AFE68586704
F-Series Fieldbus Adapter Modules Installation Note 3AXD50000008201
ACS355 HVAC With BACnet (+N831) Document Guide 3AXD50000023355
ABB offers training courses on their VFDs; navigate to www.abb.com/drives and select Training Courses.
For questions about applications covered in this manual, and for questions about how the VFDs are
installed in your RenewAire ERV unit, contact RenewAire Customer Support at 800-627-4499.
PURPOSE OF PROVIDED KEYPAD

ABB VARIABLE FREQUENCY DRIVES
51.800.627.4499 ABB VFD SUPPLEMENTAL MANUAL RENEWAIRE.COM
WIRING OPTIONS
WIRING SCHEMATICS
INSTALLATION
“ON” SIGNAL CONNECTIONS
If the ERV is equipped with Damper(s) and/or with just one VFD, the ON Signal control wires are connected
to the low-voltage terminal strip in the ERV E-box. See Fig. 1.
Install a jumper between terminals 2 and 3 to use the ERV’s on-board 24VAC power. Do this when the
external control(s) have isolated contacts that don’t provide any voltage, as in the top two examples.
Make no connections between terminals 1 & 2 and terminals 3-5 if the external control has a voltage
output to provide the ON signal. This voltage must be 24VAC.
With ERVs equipped with no dampers and 2 VFDs, the ON signal control wires are connected directly to the
VFD. See Fig. 2 & 3.
“SPEED” SIGNAL CONNECTIONS
Any SPEED Signal connections are made directly to the VFD (see Figures 4,6 & 7). The VFDs can accept
4-20mA or 0-10vdc analog control signals to operate at varying speeds. The VFDs also can accept
momentary-contact inputs to operate at up to three pre-set speeds. VFD Parameters must be properly set
to accept and act on Speed signals. Wiring for analog control signals should be twisted-pair, single- or
double-shielded cable, with shield (and drain if provided) grounded at only one end of the cable.
LEADER-FOLLOWER CONNECTIONS
ON and SPEED signals can be passed from the LEADER VFD to a FOLLOWER VFD. See Figures 3 & 5.
Capacitors in VFDs
Retain Charge
Allow 2 minutes after shutting
off power to the VFDs to allow
the capacitors in the VFD to
fully discharge. Do not connect
or disconnect wires at the VFD
without waiting 2 minutes.
CAUTION
F1 CONNECTION OF ON SIGNALS TO LOW-VOLTAGE TERMINAL STRIP IN ERV E-BOX.