Generac Power Systems rtsy100a3 Owner's Manual page 7

Y wire
Control of Air Conditioner Load
1. Route the thermostat cable (from the furnace to the outdoor air
conditioner unit) to the transfer switch.
2. Connect the wire to the terminal strip terminals (Air 1) on the
OPCB as shown in Figure 2.1. These are normally closed con-
tacts 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
strip terminals (Air 2).
Contact Ratings
Air 1 & 2
These instructions are for a typical air conditioner installation.
Control of heat pump and 2-stage air conditioners will require
special connections or the use of Power Management Modules
to control the loads.
Figure 2.1 — Overload Prevention Control
0 Ground
194 +12V
23 Transfer
A/C 1 & LOAD 1
A/C 2 & LOAD 2
LOAD 3
LOAD 4
24 VAC, 5.0 Amps Max
NOTE:
LOAD
1
SUPPLY
T1
NEUTRAL
LOAD
2
SUPPLY
A/C 1
1
24V
LOAD 1
2
1A MAX
A/C 2
1
24V
LOAD 2
2
1A MAX
1
LOAD 3
2
1A MAX
1
4
LOAD
2
1A MAX
Control of a Separate Contactor
A separate contactor relay module can be purchased from the manu-
facturer. This model is supplied in a 24 Vac or 120 Vac coil version.
1. Mount the contactor module and connect the load to the main
contacts.
2. Connect the contactor coil to the desired OPCB L1-L4 terminals
on the terminal strip.
3. Connect additional Power Management Module contactors in a
similar fashion.
It will be necessary to determine the order of "shedding" the
connected loads and connect the loads to the OPCB in that
order. One is the highest priority and four is the lowest priority.
Supply
PMM #1
Supply
PMM #2
Coil wires
Supply
PMM #3
Supply
PMM #4
NOTE:
Installation
Load #1
Load #2
Load #3
Load #4
5