Tigo Ts4-a-2f Fire Safety Rapid Shutdown Unit User Guide (+ PDF)

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This document is for quick guidance only. For details, please refer to the TS4-A-F/-2F Installation and Operations Manual.
Damage caused by failure to follow the contents of the TS4-A-F/-2F Installation and Operations manual is not covered by the warranty.
Install all TS4-F, TS4-A-F, and/or TS4-A-2F BEFORE powering on the RSS transmitter.
TS4-A-F, TS4-A-2F and a Tigo RSS Transmitter are a solution to meet NEC 2017 & 2020 690.12 Rapid Shutdown requirements. TS4-F, TS4- A-F, and TS4-A-2F units automatically enter rapid shutdown mode when the RSS Transmitter is switched off, and resume energy production when power is restored to the RSS Transmitter. Wait 30 seconds after rapid shutdown activation before disconnecting DC cables or turning off DC disconnect.

QR code

A Tigo RSS Transmitter is required for the proper operation of this rapid shutdown system. For more information scan the QR code here.

Commissioning

	Check Item	Acceptance Criteria
	TS4 installation	All PV modules are connected to a TS4-F/TS4-A-F/TS4-A-2F.
	Tigo RSS Transmitter	The Tigo RSS Transmitter is installed per the RSS Transmitter Installation Manual. If Inverter integrated, follow the inverter manufacturer’s instructions for signal/power.
	Connections	All connectors are securely mated and of same type.
	Voltage check	The TS4-A-F passes 0.6VDC when the keep-alive signal is not present. String voltage = 0.6V x # of modules in the string
	Wire Management	All conductors are properly secured throughout the array. ANSI/NFPA 70 wiring methods used. Multi-transmitter systems either: • have followed the PV Conductor Installation Required Practices in the full Manual, • or have installed the Tigo RSS Transmitter 2.0 and have linked all transmitters in the system together.
	Workmanship	Wire management and general best practices were used.

Commissioning notes

Each PV string will produce less than 30VDC until the RSS Transmitter is activated/powered.
When power is provided to the RSS Transmitter the PV strings will produce full voltage under environmental conditions.
Commission the PV system as per best

Issue	Check
No string voltage	Check that all string connectors are securely connected.
Lower voltage than expected	Check that all PV module connectors are securely connected. Note – with no keep-alive signal the string voltage will equal: # PV modules x 0.6VDC Check that the RSS transmitter is powered on.
Inconsistent voltage reading when no signal is present	1. Apply power to the RSS Transmitter 2. Use an RSS Signal Detector to determine if the individual TS4s are receiving the keep alive signal.