Before starting installation, download the product manual from www.abb.
com/solarinverters. Choose the correct country, string inverters, single phase,
choose the product and proceed to the “download” section.
Read and follow all safety and installation instructions to avoid disabling any
safety features or making the warranty invalid.
Quick installation guide
UNO-DM-3.3/3.8/4.6/5.0-TL-PLUS-US
(from 3.3 to 5.0 kW)
ABB solar inverters
1.
Labels and Symbols
Inverter Models and Components
2.
EN
Mounting Instructions
4.
Installation location
3.
7.
Input connection (DC)
6.
Rapid Shutdown
5.
Clamps terminal use
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS -- KEEP IN A SAFE PLACE!
The installer must read this document in its entirety before installing or commissioning this equipment.
For more detailed information regarding proper installation and use of this product, refer to the product manual located at www.abb.com/solarinverters. The
labels on the inverter have the markings, main technical data and identification of the equipment and manufacturer. The technical data shown in this quick
installation guide does not replace that shown on the labels attached to the equipment.
Symbols used in the guide and on the products
These are nationally recognized test laboratory marks show-
ing certification to UL 1741 and CSA-C22 No. 107.1-01
ø
Phase
Hazardous voltage
Direct and alternating currents, respectively
General warning - Important safety information
+ -
Positive pole and negative pole of the input voltage (DC)
Hot surfaces
10
Stored energy discharge time
System earth conductor (main grounding protective
earth, PE)
Consult product manual
Equipment Grounding Conductor (EGC)
- This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
This installation guide covers 4 inverter models of different power levels: 3.3 kW, 3.8 kW, 4.6 kW and 5.0kW.
Main components
01
Display
07
Wall bracket
13
AC output terminal blocks
19
1/2” communication conduit
drill out
02
LED panel
08
Lock spring
14
Wiring box
20
Markings for 3/4” or 1” conduit
drill outs
03
Keypad
09
Heatsink
15
Wi-Fi antenna (-B models only)
21
Opening for 3/4” AC conduit
04
Inverter front cover
10
Accessory board (optional)
16
Protective Earth (PE) connection
point
22
Lock screw position
05
Wiring box front cover
11
Inverter
17
Conduit drill out sizes 3/4”, 1” (drill out
markings on back side)
23
Power supply for rapid shutdown
(RSD) terminal blocks
06
DC disconnect switch
12
DC input terminal blocks
(two MPPT)
18
lower flange
Installation site and position
-
Refer Datasheet/Manual to confirm that the environmental specifications have been met
-Do not install the inverter in full sun. If needed, use a sun shade to minimize solar
irradiation, especially for temperatures over 104°F/40°C.
-Do not install in closed spaces where air does not circulate freely
-
Always ensure that the flow of air around the inverter is not blocked, so as to prevent
overheating.
-
Do not install the equipment near flammable substances (minimum distance: 10 ft).
-
Do not install the equipment on wooden walls or other flammable substances.
- Do not install in inhabited rooms or where the prolonged presence of people or animals
is expected, because of the inverter’s noise level during operation. The sound level
is heavily influenced by its location (for example, the surface around the inverter, the
environment, etc.) and grid quality.
-Install on a wall or strong structure capable of bearing weight
-
Install vertically with a maximum inclination as indicated in the figure
-
Maintain minimum clearance from objects blocking air circulation and spacing betwe
-
en inverter as indicated in the figures
-
Ensure sufficient working area in front of the inverter for wiring box access
-If possible, install at eye level so that the display and LEDs can be seen easily
-
Install at a height that takes account of the weight of the equipment
-Position multiple inverters side-by-side, maintaining minimum clearances
(measured from the outermost edge of the inverter)
-Multiple inverters can also be placed in a staggered arrangement. Minimum
clearances for staggered arrangements include width of the inverter cover
plus additional allowances for inverters arranged above or below
-
All installations over 6500’ high (2,000 meters) must be assessed by ABB
Technical Sales to determine the proper datasheet derating
Do not block access to the external AC and DC disconnects.
Please refer to the warranty terms and conditions and avoid voiding the
warranty with improper installation.
Mount the inverter following the step-by-step procedure
below.
Do not remove the inverter chassis cover in
adverse weather conditions (e.g. rain, snow)
or during periods of high humidity (>95%).
Components included in mounting kit
QTY
Wall bracket
1
Jumpers for
configuring
paralleled inputs.
1 + 1
In additio
n to what
is explain
ed in this
guide, th
e safety a
nd installa
tion inform
ation pro
vided in th
e installat
ion manu
al must be
read and
followed
.
The techn
ical docu
mentation
and the in
terface an
d manage
ment softw
are for th
e product
are availa
ble at the
website.
XXXX
XXXXX
XXXXX
XXXX
X
XXXX
XXXXX
XXXXXX
XXXX
ABB solar
inverter
s
Quick installation
guide (QIG)
1
- Position the bracket
07
so that it is level on the wall or pole
- It is the installer’s responsibility to choose an appropriate
number and distribution of attachment points. The
choice must be based on the type of wall, frame or other
support, the type of anchors to be used, and their ability
to support 4 times the inverter’s weight (4x33lbs=132lbs
for all models).
Depending on the type and number of attachment
points, drill the required holes to mount the bracket (see
figure detail
A
)
- Secure the bracket to the wall or frame
- If needed, make conduit cutouts in the wiring box chas-
sis, before the wiring box is put on the wall
- Carefully lift the inverter onto the mounting bracket and
hang the inverter by inserting the two tabs on each side
the bracket into the two slots on the inverter (see figure
detail
B
)
- Then push the lower part of the inverter backwards until
the two little clamps on the lower flange secure the inverter
in place
- Secure the inverter chassis bottom flange to the mounting
surface using another screw (see Figure detail
C
). Note
that the bottom flange is not a load-bearing component.
A
C
B
Confirm the correct polarity in the input strings.
Confirm there is no ground leakage current in the PV array.
When exposed to sunlight, the PV panels supply DC direct voltage to the inverter.
The inverter’s DC switch disconnects the DC current from the PV panels. In the “OFF” position the inverter will stop producing power, but
DOES NOT disconnect the AC from the grid. To prevent electrocution hazards, all the connection operations must be carried out with the
external AC disconnect switch, downstream of the inverter (grid side), open and locked out.
The transformerless design requires that the PV array to be floating with respect to ground per NEC 690.35.
DC PV string wire must be listed PV wire per NEC 690.35 rated minimum 600V.
PV output conductors (wiring) must consist of sheathed (jacketed) multi-conductor cables or single insulated conductors (wires) which
must be installed in an approved raceway. These conductors must be isolated from the enclosure and system grounding, as required by
NEC 690.35. This is the responsibility of the installer.
Confirm that the maximum PV array short circuit current for each DC input channel is within the inverter specification (see table in Section
14). Array equipment grounding must be installed per the requirements of the NEC and is the responsibility of the installer. A configuration
program that can help to correctly size the photovoltaic system is available on at http://www.stringsizer.abb.com.
- Turn the DC switch OFF
- Loosen the four captive screws on the wiring box cover (Torx 20) and remove the cover
- Pass the DC wires through the openings dedicated to the DC conduit.
Conduit must be sealed using water-tight fittings to maintain NEMA Type 4X enclosure integrity.
Installer should follow conduit manufacturers’ guidelines and best practices.
- Connect the DC wiring to DC input terminal blocks
12
. DC wiring terminals are spring pressure type and accommodate a wire size range of 20-8 AWG.
Connect the strings in either independent or parallel mode, following the appropriate set of instructions below:
Independent mode configuration
Parallel mode configuration
In case of two PV arrays, if each of them has a current rating lower than the
maximum current rating for a single inverter channel, they may be connected
as “IND” array, each with its own MPPT. In this case, do nothing with the
jumper wires which came with the inverters.
- Connect the positive side of the first PV array to +IN1, and its negative side to -IN1.
- Connect the positive side of the second PV array to +IN2 and its negative side to -IN2.
Up to four strings can be connected in independent mode.
- During commissioning, confirm that the input mode is set to IND. The input
mode is set using the display menu. Settings>Input Mode>Independent.
If connecting a single array, configure the inverter for parallel input mode.
If a PV array’s output current is more than the rating for a single inverter
channel:
- connect the red jumper wire between the +IN1 and +IN2 terminal block
inputs. Then connect the jumper wire black wire between the -IN1 and -IN2
terminals. Remember later to set the input mode to PAR from the display
(Settings>Input Mode>Parallel).
- Connect the array to the IN1 (MPPT1) and IN2 (MPPT2)
input positions,
running separate wires for
positive (+) and negative (-)
for each array.
CAUTION
ATTENTION
REFER TO LOCAL CODE
FOR WIRE SIZE
FAIRE RÉFERENCE À LA
LÉGISLATION LOCALE POUR
LA DIMENSION DU CABLE
-IN1
+IN1
-IN2
+IN2
-RSD
+RSD
MPPT1
String2
MPPT2
String2
MPPT2
String1
MPPT1
String1
CAUTION
ATTENTION
REFER TO LOCAL CODE
FOR WIRE SIZE
FAIRE RÉFERENCE À LA
LÉGISLATION LOCALE POUR
LA DIMENSION DU CABLE
-IN1
+IN1
-IN2
+IN2
PARALLEL
JUMPERS
-RSD
+RSD
MPPT2
MPPT1
07
08
09
12
23
10
11
06
13
14
16
21
02
01
04
05
06
03
20
17
19
06
18
22
Bottom view
Front view
Left view
Right view
Back view
15
6
in
4 in
4 in
8
in
NO
OK
NO
OK
OK
OK
OK
OK
OK
OK
OK
5° MAX
5° MAX
NO
NO
CAUTION
ATTENTION
REFER TO LOCAL CODE
FOR WIRE SIZE
FAIRE RÉFERENCE À LA
LÉGISLATION LOCALE POUR
LA DIMENSION DU CABLE
-IN1
+IN1
-IN2
+IN2
1
2
3
-RSD
+RSD
NOTE: If a RSD device was istalled into the plant, it also will needed to connect the AC grid to allow
the inverter to power-up!
The installer must use an external rapid shutdown device compliant with the 2014 NEC.
Automatic shutdown occurs at the rooftop box when utility power is lost or when the PV system’s AC di
-
sconnect switch is opened. In jurisdictions requiring a dedicated activation switch, install an emergency stop
button external to the inverter.
The wiring box has 24Vdc (0.4A max) on a spring-loaded terminal block to the left of the PV input area,
which is designed to be used to power a RSD device.
RSD wiring terminals accommodate a wire size range of 26-12 AWG.
- Install RSD device wires in the RSD terminal block;
+24V wire to +RSD terminal; - 24V wire to - RSD terminal
6
in
4 in
4 in
8
in
NO
OK
NO
OK
OK
OK
OK
OK
OK
OK
OK
5° MAX
5° MAX
NO
NO
All power conductors will be inserter in spring clamp terminals.
The figure shows an example of how to make the wire connection:
1) Insert a small flat screwdriver in the slot and lightly press the screwdriver from top to bottom;
insert the screwdriver until the spring opens.
2) Insert the cable in the spring clamp.
3) Remove the screwdriver.
4) When connections are complete, give each wire a pull test
