Product Manual

6
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 2.3
• 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 2.4).
• 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.
Figure 2.4 — 120 Vac Supply Connections
3.1 FUNCTIONAL TESTS AND
ADJUSTMENTS
Following transfer switch installation and intercon-
nection, inspect the entire installation carefully. A
competent, qualified electrician should inspect it. The
installation should comply strictly with all applicable
codes, standards, and regulations. When absolutely
certain the installation is proper and correct, com-
plete a functional test of the system.

Perform functional tests in the exact order
presented in this manual, or damage could be
done to the switch.
IMPORTANT: Before proceeding with functional tests, read and
make sure all instructions and information in this section are under-
stood. Also read the information and instructions of labels and decals
affixed to the switch. Note any options or accessories that might be
installed and review their operation.
Operation
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 sf orm er
leads
Field installed
Existing
wiring
Figure 2.3 — 24 Vac Supply Connections