Installation Instructions

6
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
manufacturer. This model is supplied in a 24 VAC (requires a
starter kit, which includes a field installed 24VAC transformer and
the first 50 amp, 24V actuated module) 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
connected loads and connect the loads to the OPCB in that
order. One is the highest priority and four is the lowest priority.
2.6 CONNECTION OF POWER SUPPLY FOR
CONTACTORS
The Overload Prevention Control Board (OPCB) can be powered
from either a 24 VAC or 120 VAC power supply. The 24 VAC
supply is from a class 2 transformer that can be purchased from
the manufacturer. Mounting holes are provided in the enclosure
subplate for mounting of the transformer. The 120 VAC supply
is fused at 5 amps and is factory connected to OPCB terminals
labeled "T1 and "Neutral".
2.6.1 24 VAC SUPPLY
Transformer connection are made as shown in Figure 2.2.
• Blue wire - OPCB "LOAD SUPPLY 1" terminal
• Black wire - OPCB "T1" terminal
• White wire - OPCB "NEUTRAL" terminal
• Yellow wire - OPCB "LOAD SUPPLY 2" terminal
2.6.2 120 VAC SUPPLY
Install the following jumpers on the OPCB module (Figure 2.3).
• Wire - Load Supply 1 to T1
• Wire - Load Supply 2 to T2

Load supply voltage on the OPCB terminals
must match the PMM contactor coil voltage, or
the equipment will be damaged.
Installation
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
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
Blue
Black
White
Yellow
Factory
wiring
Tran sform er
leads
Field installed
Existing
wiring
Figure 2.2 — 24 VAC Supply Connections