Product Manual

5
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
OPCB as shown in Figure 2.2. 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 24 VAC, 5.0 Amps Max
NOTE:
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.
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 (contactor 1, 2,
3 or 4) terminals on the terminal strip.
3. Connect additional Power Management Module contactors in a
similar fashion.
NOTE:
It will be necessary to determine the order of “shedding” the con-
nected loads and connect the loads to the OPCB in that order.
One is the highest priority and four is the lowest priority.
Y wire
Y wire
0 Ground
194 +12V
23 Transfer
T1
NEUTRAL
A/C 1
24V
A/C 2
24V
LOAD 1
LOAD 2
LOAD 3
LOAD
4
A/C 1 & LOAD 1
PMM #1 Load #1
Supply
Coil wires
PMM #2 Load #2
Supply
PMM #4 Load #4
Supply
PMM #3 Load #3
Supply
LOAD
SUPPLY
LOAD
SUPPLY
1
2
1
2
2
2
2
1
1
1
1A MAX
1A MAX
1A MAX
1A MAX
A/C 2 & LOAD 2
LOAD 3
LOAD 4
Figure 2.2 — Overload Prevention Control
Installation