Briggs & Stratton 71020, 71021, 71019, 71018 Controls, Supervisory Control Wiring, System Setup

8.Connect Neutral conductor from the generator control panel to the transfer switch “NEUTRAL” terminal.

9.Connect generator Ground conductor from the control panel to the transfer switch “GND” terminal.

NOTE: Assure generator equipment grounding conductor is connected per applicable federal, state and local codes, standards and regulations.

10.Connect generator “UTILITY 240 VAC” terminals to transfer switch “UTILITY 240 VAC” terminals. Use minimum #14 AWG conductors.

11.Tighten all wire connections/fasteners to proper torque. See inside transfer switch enclosure for proper torque values.

Supervisory Control Wiring

1.Terminal strip on control module in transfer switch has four connections for customer use. There are two sets of “Normally Closed” contacts available. They will be activated when generator power is required. These can be used for supervisory control of large connected loads on generator. Loads will be allowed to operate if there is enough generator power available.

NOTE: There are two wireways provided to keep the supervisory loads separated from each other.

2.Terminals “A-A” on control module are rated for 24 VAC and air conditioner contactor control. Contacts are connected in series with the air conditioner contactor control circuit (Figure 5).

Air Conditioner Contactor

System Setup

You must perform the following on the control module before operating the system:

•If generator is installed in an area regularly subjected to temperatures below 40°F (4°C), select a 50 second warm up time by moving jumper installed on JP2 (Figure 7) from ‘20’ position to ‘50’ position.

•Place 2 position switch (Figure 7) in ‘NG’ or ‘LP’ position, whichever is appropriate for your system.

•Place 3 position switch (Figure 7) to match KW rating of installed generator.

3 Position	JP2	2 Position
Switch		Switch
		CT1 & CT2
		Connectors
		Supervisory
		Contacts

A A

24 VAC

Figure 5 — Terminals “A-A”

3.Terminals “B-B” on control module are rated for 1 Amp 125 VAC and installer supplied contactor to control a large load. Example: electric hot water heater. Contacts are connected in series with the contactor control circuit (Figure 6).

B	Contactor
	Neutral
B
	120 VAC

Figure 6 — Terminals “B-B”

4.Tighten all wire connections/fasteners to proper torque. See inside transfer switch enclosure for proper torque values.

Figure 7 — Control Module

Controls

Other than a Manual Override lever, there are no operator controls because this is an automatic transfer switch. The manual override is to be used only by licensed professionals.

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