Generac 04077-01, 04109-1, 04079-1, 00789-1, 00844-1 manual Generators and GTS Transfer Switches

Section 1 — Installation

Guardian Air-cooled Generators

Figure 1.11 – Interconnection With GTS Transfer Switch (100A, y-type)

1.12 GENERATORS AND GTS TRANSFER SWITCHES

Guardian generators (this DOES NOT APPLY to single- phase sound attenuated units) may be installed with either a prepackaged transfer switch or with a stan- dard GTS-type automatic transfer switch (Figure 1.11). You can do this by connecting generator control console terminals 178 and 183 to identically num- bered terminals in the GTS switch. Turn dip switch #2 “Remote Not Auto” to the ON position on the generator control printed circuit board.

NOTE:

The enclosure roof will need to be removed to gain access to the printed circuit board.

When a Guardian generator is installed with a stan- dard GTS-type switch, solid-state circuit boards in the transfer switch control automatic operation. For automatic operating sequences, parameters and timing, refer to the appropriate GTS transfer switch manual.

Automatic operation for Guardian generators installed with prepackaged transfer switches is controlled by a control module circuit board in the control panel. Refer to the “Operation” section of this manual.

1.13 CONTROL CIRCUIT INTERCONNECTIONS

For 6 kw, 8 kW and 10 kW units (not including sound attenuated), these interconnections consist of “Utility” and leads 23 and 194 (see Figure 1.9, Page 13). These four leads must be routed in con- duit that is separate from the generator AC power leads. Control lead functions may be briefly described as follows:

1.Utility 1 and Utility 2: Deliver utility source power to the generator's logic circuit board.

2.Leads 23 and 194: After the generator starts, the logic circuit board in control panel delivers a “transfer” signal via these two leads.

•When logic circuit board action closes this circuit, it causes transfer switch main contacts to activate and connect load circuits to generator output.

•When utility source voltage is restored, logic board opens leads 23 and 194 circuit. Loads are then transferred back to utility circuit.

NOTE:

Recommended size of control circuit leads (Utility 1 and 2, and 23 and 194) is No. 14 AWG stranded copper wire.

14 Generac® Power Systems, Inc.