Installation - Part - enphase IQ Combiner 4 Quick Install Manual

INSTALLATION — Part 1
It is best to complete Installation Part 1 BEFORE installing Enphase
Microinverters, Enphase IQ Battery and/or Enphase IQ System Controller.
1
Choose a location for the IQ Combiner
A ) Install the IQ Combiner 4C or IQ Combiner 4 in a readily accessible
location, at least three feet (91 cm) off the ground.
B ) Consider the dimensions of the IQ Combiner, easy access, box height,
and length of cable when selecting the location. The IQ Combiner is
rainproof but not watertight.
C ) Mount the IQ Combiner 4C or Q Combiner 4 on a vertical surface.
NOTE: You must mount the IQ Combiner within 15 degrees of vertical.
2 Install Circuit Breaker(s)
The combiner includes one two-pole 10A circuit breaker that feeds the IQ
Gateway and the AC outlet (if present). You can install additional break-
ers, if needed. You must follow all NEC and local electrical codes. For IQ
8 systems, this breaker must not be used to power the IQ Gateway and
the procedure described in steps C and D must be followed. For IQ6/IQ7
systems, skip the steps C and D.
A ) Open the enclosure door. Pinch the top of the hinge rod using a pair of
needle-nosed pliers. Slide the door up and remove it. Set the door aside
for later reattachment.
NOTE: a) Risk of equipment damage. Do not remove the
pre-installed heat shield attached to the enclosure door.
b) Risk of equipment damage. Always unplug the USB cable from the IQ
Gateway USB port prior to removing the deadfront.
B ) Remove the plastic deadfront with the integrated cell modem on
the deadfront. It is not necessary to completely remove the screws.
Warning! Risk of electric shock. To maintain the warranty,
do not modify the dead-front other than to remove or replace
filler plates, as needed.
C ) For IQ8 installations, there are three ways of installing the IQ Gateway
breaker:
Option 1: Remove the IQ Gateway breaker from the combiner and
put it into the generator breaker space in IQ System Controller for IQ
Gateway connection if Generator is not present
Option 2: Remove the IQ Gateway breaker from combiner and put it in
a protected subpanel if it is available nearby and has space for breaker
Option 3: If subpanel is far away and generator is available then
replace the BR240 NFT breaker with a quad breaker BRK-20A40A-2P-
240V and connect IQ Gateway to the outer poles of the quad breaker.
D ) For IQ8 installations, run wires from L1 and L2 terminals on the IQ
Gateway terminal block through PV conduit to the location where IQ
Gateway breaker is installed as per the options listed above.
E ) Remove a filler plate on the deadfront for each breaker position you
will use. To remove the filler plate, press the single latch inward while
gently pushing the filler plate out.
F ) Snap the breaker onto the busbar, using only the breaker positions
indicated in the diagram on the door of the unit.
3
Drill Holes to Accept Conduit
A ) The bottom and sides of the IQ Combiner 4/4C are the best locations
to drill holes for conduit fittings. Rear conduit entry below the busbar
assembly is also supported.
Warning! Risk of equipment damage. Do not drill conduit
holes on the top of the box or at any location that allows
moisture ingress.
NOTE: When drilling, consider the internal parts of the combiner. Make
sure that the holes do not interfere with the internal workings, mechan-
ics, or the deadfront legs in the corners of the combiner.
Best Practice: Use a stepped drill bit to make the conduit holes. Using
a hole saw may crack the plastic housing. As an alternative, use a sharp
chassis punch with caution.
B ) 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.
C ) Use only UL-listed rain-tight hubs for wire entry into the enclosure.
Warning! Risk of equipment damage. Observe bend radius
requirements when routing wires.
Wire the Output Connections
4
Refer to the diagram on the door of the IQ Combiner 4C and do the following:
A ) Use conductors sized per local code requirements taking into consid-
eration the voltage drop/rise and upstream breaker or fuse.
B ) The two terminals below the circuit breaker(s) are the output connec-
tions. Install L1 into the left terminal and L2 into the right terminal.
C ) Connect the neutral (white) to the neutral busbar.
NOTE: Enphase IQ Series Microinverters use a two-wire system and do
not use a Neutral. However, the IQ Gateway in the combiner still requires
a Neutral from the load center.
D ) Connect the ground (green or green/yellow) to the Ground busbar.
E ) Torque all connections as indicated by the table below.
Wire Inputs from the AC Branch Circuits
5
You can install AC branch circuit breakers up to 80 A total (sum of handle
ratings, excluding the 10 A breaker). With individual branch circuits, you will
typically use up to four 20 A breakers. Refer to the diagram on the door of
the IQ Combiner and do the following:
A ) Use copper conductors sized to meet local code requirements and
voltage drop/rise considerations.
B ) Bring in the wires from each AC branch circuit.
C ) Connect the ground (green or green/yellow) to the ground busbar.
D ) Pass the L1 conductors from each PV branch circuit through the produc-
tion CT in the same direction as the arrow on the side of the CT.
E ) If you use the fourth (Battery/PV) breaker position for PV, you must route
the L1 conductor through the production CT.
NOTE: Do not pass conductors from AC Battery branch circuits through
the production CT. This will distort production readings. The IQ Battery
circuits must terminate on the load side of the consumption CTs.
F ) Connect L1 and L2 (usually one black and one red) from each AC branch
circuit (PV and/or battery) to the circuit breaker(s). Observe the L1 and
L2 polarity marking at each breaker position.
G ) Torque all connections as indicated by the following table.
H) For IQ8 installations, you must install hold down kits for the breakers
for PV branch circuits as per the NEC code. Refer to the installation
instructions of the hold down kit for installing the hold down kit for IQ8
systems.
CONNECTION
Eaton BR series DG breaker(s)
60 A circuit breaker only
Neutral and ground
Large screw
Small screw
Main lug
Copper conductors only, rated minimum 75°C. Follow NFPA 70 (NEC) or
CSA C22.1 part 1 and all local codes.
For DG breakers larger than 20 A, use wire insulated for 90°C based on
75°C ampacities.
The busbar supports a maximum of 90A of circuit breakers including 4
x 20A PV breakers and 10A of IQ Gateway breaker.
WIRE SIZES TORQUE
14-10 AWG 2.2 Nm (20 in-lb)
8 AWG 2.8 Nm (25 in-lb)
6-4 AWG 3.0 Nm (27 in-lb)
4-1/0 AWG 5.0 Nm (45 in-lb)
14-1/0 AWG 5.0 Nm (45 in-lb)
14 - 6 AWG 2.2 Nm (20 in-lb)
10-4 AWG 5.0 Nm (45 in-lb)
3-2/0 AWG 5.6 Nm (50 in-lb)