Generac Power Systems GH-410 Installation Manuallines page 23

Sequence of Operation
The 4 green status LEDs will indicate when a load priority level is
enabled.
• All loads are enabled when the transfer signal is off. (ATS in
Utility position).
• If the transfer signal is pulled low (Active)
• All loads are enabled until an overload is detected
• When an overload is detected all loads are disabled
• After 5 minutes priority 1 loads are enabled.
• After another 30 seconds priority 2 loads are enabled
• After another 30 seconds priority 3 loads are enabled
• After another 30 seconds priority 4 loads are enabled
If an overload is detected within 30 seconds of a level being
enabled, all loads are disabled again and the sequence repeats.
However, the level that caused the overload and all levels higher
will not be enabled again for 30 minutes.
Control of Air Conditioner Load
1. Route the thermostat cable (from the furnace/thermostat to
the outdoor air conditioner unit) to the transfer switch.
2. Connect the wire to the terminal strip terminals (Air 1) on
the LSM as shown in Figure 2.2. These are normally closed
contacts which open upon load shed conditions. Route
thermostat wire away from High voltage wires.
3. If required, connect the second air conditioner to the terminal
These instructions are for a typical air conditioner
installation. Control of heat pump and 2-stage air
conditioners will require special connections.
Control of a Separate Contactor
A separate contactor relay module can be purchased from the
manufacturer. If a different relay is used it must have a 120 Vac
coil voltage. The LSM supplies fused (5A) 120 Vac to energize the
coils of the relay contactors (contactor 1, 2, 3 or 4).
1. Mount the contactor module and connect the load to the main
2. Connect the contactor coil to the desired LSM (contactor 1, 2,
3. Connect additional load shedding contactors in a similar
Load Shed Module Connections
0 Ground 0 Ground
194 +12V 194 +12V
T1 T1
23 Transfer 23 Transfer
NEUTRAL NEUTRAL
AIR 1 AIR 1
CONTACTOR CONTACTOR
1 1
AIR 2 AIR 2
CONTACTOR CONTACTOR
2 2
Priority 1 Priority 1
CONTACTOR CONTACTOR
3 3
Priority 2 Priority 2
Priority 3 Priority 3
CONTACTOR CONTACTOR
4 4
Priority 4 Priority 4
strip terminals (Air 2).
Contact Ratings
Air 1 & 2
NOTE:
contacts.
3 or 4) terminals on the terminal strip.
fashion.
Supply
Contactor #1
Supply
Contactor #2
Coil wires
Supply
Contactor #3
Supply
Contactor #4
Appendix D
24 VAC, 5.0 Amps Max
Load #1
Load #2
Load #3
Load #4
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