Prepare the AC Combiner Box
A ) If needed, reposition the mounting feet. You can adjust each of the
four mounting feet to several different positions. Adjust as desired for
the mounting location.
B ) Open the enclosure door. Pinch the top of the hinge rod using a nee-
dle-nosed pliers. Slide the door up and away to remove it. Set the door
aside for later reattachment.
C ) Mount the box on a vertical surface, using supplied washers to protect
the feet.
D ) Remove the clear plastic deadfront and keep the screws and washers
in a safe place (for example, inside the removed enclosure door).
E ) Locate and remove the Spare Parts and XA-SLOT bags.
2
Foot mounting on
back of unit
Mounting foot
Foot mounting screw
Foot mounted horizontally
Foot mounted at an angle
Foot mounted vertically
Remove an Unused Circuit Breaker (optional)
The combiner includes three 20 A, 2-pole circuit breakers for combining in-
puts and one single-pole 5A breaker for the 5A AC outlet. If required by local
jurisdiction, you can remove unused 2-pole breaker(s) and install a blanking
plate. Every AC Combiner comes with a blanking plate with screws.
If you do not need to remove circuit break-
er(s), skip this step.
A ) Use a straight blade screwdriver to
completely loosen the busbar side of
the Line 1 and Line 2 terminal blocks
(gray).
B ) Remove the load wire(s), if any, on the
breaker you want to remove.
C ) Loosen the busbar lug(s) of only the
breaker you want to remove.
D ) Release the DIN rail locking tabs of all
breakers.
E ) Rock the breaker/busbar assembly to
the left to release it from the DIN rail,
and remove the breaker.
F ) Rock the breakers back to the right so
they are seated back on the DIN Rail.
G ) Lock all of the breaker DIN rail locking
tabs.
H ) Tighten the busbar side of the
Line 1 and Line 2 terminal blocks (gray)
to 14 in-lbs (1.6 Nm).
I ) Verify that all busbar connections are
tight.
J ) Position the blanking plate onto the dead front
over the location of the removed breaker.
K ) Use a screwdriver and the two provided
screws to secure the plate into place.
3
Locking tabs
INSTALLATION — Part 1
You can complete Installation Part 1 before or after installing the PV
system.
Choose a location for the AC Combiner Box
A ) Install the AC Combiner Box in a readily accessible location. The best
practice is to install at least four feet (1.2 meters) off the ground.
However, never install below three feet (0.9 meters) off the ground.
B ) Consider the dimensions of the combiner box, easy access, box
height, and length of cable when selecting the location. Do not block
the vents. The box is rainproof but not watertight.
NOTE
: You must mount the Combiner within 15 degrees of vertical.
1
Blanking
plate
Warning!
The AC Combiner has a pre-installed heat shield
attached to the enclosure door. Do not remove the heat
shield.
Drill Hole(s) to Accept Conduit
A ) A label on the outside of the combiner box indicates the best location to
make a hole or holes to accept conduit fittings. Locate this label.
Best Practice:
Use a stepped drill bit for making the conduit holes. Using
a hole saw may crack the plastic housing. As an alternative, use a sharp
chassis punch with caution. Drill only at the label location. Do not drill a
hole in any other location on the box.
Note:
The label template has three holes, but most applications
require only two.
B ) Use the provided label as a template for typical conduit placement. The
center of the holes on the label are marked with a “+” .
C ) Use a snap punch or other type of center punch to prevent the drill from
wandering. Drill a pilot hole with a smaller drill before using a step drill
bit.
D ) Remove the label after drilling.
E ) Use only UL-listed rain-tight or wet location hubs for wire entry into the
enclosure.
4
Warning!
Do not drill conduit holes on the top of the box
or at any location that allows moisture ingress. This
voids the warranty for the combiner box and the Envoy-S.
Note
:
If needed, you can request a cover for
the 5A AC outlet from
enphase.com/en-us/
support/contact
.
Loosen these
screws
