IQ system Controller 2 Installation

Use the Enphase Installer App to commission the IQ System Controller
2. Once connected to the IQ Gateway, refer to the Installer Toolkit help
topics for more information.
CONFIGURE and ACTIVATE
OPERATION
If you do not see the IQ System Controller 2 information in Enphase
App, check that the IQ Gateway and the Internet connection are
working.
Field Adjustable Trip Points
IQ System Controller 2 has adjustable voltage and frequency trip points
that may need to be set depending upon local requirements. An installer
can request Enphase Customer Support for making requested changes
to the IQ System Controller 2 trip points. It is important to ensure that all
electrical code requirements as well as requirements imposed by local
Authorities Having Jurisdictions (AHJ) are followed while setting the trip
points.
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10
Close and energize IQ System Controller 2
* WARNING: Before energizing, make sure that ALL IQ System Control-
ler 2 connections are properly installed and conductors terminated.
A ) Reconnect the deadfront ground cable to the grounding bar, torque as
shown in the table on the unit label (and on page 4 of this guide), and
replace the deadfront using the six reserved screws. Tighten the cover
screws using a Phillips screw driver.
* WARNING! Risk of equipment damage. Ensure that no conductors are
pinched before replacing the cover.
* WARNING! Conductors are factory provided for the generator, AC
combiner and IQ Battery. If no generator is used with the system, these
conductors will not be terminated. If the IQ Combiner does not connect to
the IQ System Controller 2, these will also not be terminated. When these
wires are not terminated, they should remain stowed in the clips on the
plastic frame supporting the panel board interior and their end caps should
not be removed.
+ DANGER: Risk of electric shock. There are many potential sources
of voltage. Check any Enphase IQ Battery, PV, or other generation source
for voltage.
B ) You must ensure that all electrical circuits external to IQ System Controller
2 are completed and safe before energizing IQ System Controller 2.
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Install the Generator CTs to standalone IQ Gateway or IQ
Gateway in the IQ Combiner box
A pair of generator CTs will be connected in parallel to the consumption CTs, if
present.
A ) Make sure that the main load center wires are de-energized until you have
secured the CT wires in the terminal blocks.
B ) Before running the CT wires through the conduit, use colored tape to mark
one of the CTs and the free end of its wires.
C ) Clamp the marked CT on Line 1 of the generator branch circuit inside the
IQ System Controller 2 box with the arrow on the CT pointing towards the
Generator breaker.
D ) Clamp the unmarked CT on Line 2 of the generator branch circuit inside the
IQ System Controller 2 box with the arrow pointing towards the Generator
breaker.
E ) Bring the CT lead wires out of IQ System Controller 2 to the standalone IQ
Gateway or IQ Gateway in the IQ Combiner box
F ) Use a screwdriver to loosen the screw on the IQ Gateway terminal block
door and open the door.
G ) Unscrew the Consumption CT wires if present
H ) For the marked CT
a. If the Consumption CT is present, use NEC approved wiring method
to splice the white wire of the CT with the white wire of Line 1 of the
consumption CT.
b. Connect the spliced white wires to the upper “C1” terminal of IQ
Gateway (“IA•” terminal for the Envoy-S Metered).
c. Splice the blue wire of the CT with the blue wire of Line 1 of the
consumption CT.
d. Connect the spliced blue wires to the lower “C1” terminal of IQ Gateway
(“IA” terminal for the Envoy-S Metered).
I ) For the unmarked CT
a. If the Consumption CT is present, use NEC approved wiring method
to splice the white wire of the CT with the white wire of Line 2 of the
consumption CT.
b. Connect the spliced white wires to the upper “C2” terminal of IQ
Gateway (“IB•” terminal for the Envoy-S Metered).
c. Splice the blue wire of the CT with the blue wire of Line 2 of the
consumption CT.
d. Connect the spliced blue wires to the lower “C2” terminal of IQ Gateway
(“IB” terminal for the Envoy-S Metered).
J ) Tighten each of the IQ Gateway terminal block screws to 5 in-lbs (0.56
Nm).
K ) Close and secure the terminal block door of the Envoy.
C ) If you work on an IQ6/7/M-series retrot system, and you plan
to energize IQ System Controller 2 and connect the PV without
commissioning the system in the same day, follow the sequence
below:
a. Leave the AC combiner breaker in the load panel where it was
originally placed, instead of connecting the AC combiner L1 and
L2 circuits to the terminal lugs in IQ System Controller. This way
your PV systems can still be functional before commissioning.
b. OPEN the NFT and IQ Battery breakers
c. CLOSE the breakers in the following order:
• Main breaker
• Load breaker
* WARNING! At commissioning, you must reconnect the AC
combiner L1 and L2 circuits back to the terminal lugs in IQ System
Controller as shown in step 5(F) in this document.
NOTE: If not commissioning the system you must ensure that the
DC switches on all IQ Batteries are turned off to avoid the depletion of
charge on the IQ Batteries.
D ) If you plan to commission the system, follow the instructions in the
Enphase Installer App for energizing IQ System Controller 2.
E ) Energize the circuit feeding the IQ System Controller 2. If installed,
turn the breaker feeding the IQ System Controller 2 to the on
position.
F ) Close and secure the door of the IQ System Controller 2.