Install A Replacement Microinverter - enphase IQ8 Design Manual

B. Enphase AC connectors are tool-removable only. To disconnect the microinverter from the
Enphase QD Cable, insert the disconnect tool and remove the connector.
C. Cover the PV module with an opaque cover.
D. Using a clamp-on meter, verify there is no current flowing in the DC wires between the PV
module and the microinverter. If the current is still flowing, check that you have completed
steps one and two above.
NOTE: Take care when measuring DC current, as most clamp-on meters must be zeroed first
and tend to drift with time.
E. Disconnect the PV module DC wire connectors from the microinverter using the
Enphase disconnect tool.
F. If present, loosen and/or remove any bonding hardware.
G. Remove the microinverter from the PV racking.
WARNING:
Risk of electric shock. Risk of fire. Do not leave any connectors on the PV system
disconnected for an extended period. If you do not plan to replace the microinverter
immediately, you must cover any unused connector with a sealing cap.

7.5 Install a replacement microinverter

A. When the replacement microinverter is available, verify that the AC branch circuit breaker is
de-energized.
B. Mount the microinverter bracket side up and under the PV module, away from rain and sun.
Allow a minimum of 1.9 cm (0.75") between the roof and the microinverter. Also, allow 1.3 cm
(0.50") between the back of the PV module and the top of the microinverter.
o
Install the microinverter under the PV module to avoid direct exposure to rain, UV, and
other harmful weather events.
o
Always install the microinverter bracket side up.
o
Do not mount the microinverter upside down.
o
Do not expose the AC or DC connectors (on the Enphase QD Cable connection, PV
module, or microinverter) to rain or condensation before the connectors are mated.
C. Torque the mounting fasteners to the values shown. Do not over-torque.
o
6 mm (1/4") mounting hardware: 5 N m (45 to 50 in-lbs.).
o
8 mm (5/16") mounting hardware: 9 N m (80 to 85 in-lbs.).
o
When using UL 2703 mounting hardware, use the manufacturer's recommended
torque value.
D. If you are using bonding hardware, the old bonding hardware should be discarded, and new
bonding hardware must be used when installing the replacement microinverter.
E. Connect the microinverter to the QD Cable connector. Listen for a click as connectors engage.
F. Connect the DC leads of each PV module to the DC input connector of the microinverter.
G. Re-mount the PV module above the microinverter.
H. Energize the AC branch circuit breaker and verify the operation of the replacement
microinverter by checking the Status LED on the connector side of the microinverter.
I. Use the Enphase Installer App mobile app to delete the old microinverter serial number from the
Enphase IQ Gateway Commercial 2 database. In the Enphase Installer App, once connected to
the gateway:
o
Tap Micros > Manage.
o
Tap
replaced.
63
the checkbox to the right of the microinverter serial number that you
© 2023 Enphase Energy Inc. All rights reserved.
IQ8 Commercial Microinverter grid-tied PV system
November 2023
USG-00026-1.0