Onan MCCK - BATTERY CONNECTION; LOAD WIRE CONNECTIONS

BATTERY CONNECTION
Exciter Cranked Plant: Refer to the wiring diagram and
Fig. 11.Plants are designed for negative (-) ground only.
The discharged water leaves at the heat exchanger (Fig.
10). Supply line connections in both systems are the
same . For general comments that apply in all cases,
refer to the instructions for standard cooling systems
in this section.
Fill the closed cooling system with clean, alkali-free
water to the proper level in the expansion tank. Add
an approved rust inhibitor to the coolant. If the plant
will be operated in freezing temperatures, use the nec¬
essary proportion of anti-freeze, and test it periodically.
Cooling system capacity (including heat exchanger) is
7 pints.
FRESH WATER
'FROM MANIFOLD
LAT WASHER
HEAT-
EXCHANGER
UPPER
BRACKET
STRAP
LOWER
BRACKET
SALT WATER
IT
STRAP
TO HEAT
EXCHANGER
PUMP
Figure tO. Heat Exchanger
Follow Onan battery recommendations. Use two 6-volt
batteries connected in series for a 12-volt power source.
See Fig. 11. Connect battery positive (+) terminal to the
start solenoid located in the control box. Connect the
negative (-) terminal to a good ground on the generator
frame. Enter rear of control box to install battery cable.
Caution: Do not disconnect starting batteries while
plant is running. The resulting over-voltage condition
will damage electric choke and control components.
REMOTE START-STOP SWITCH (Optional)
For remote control of starting and stopping, use three
wires to connect a remote switch (SPDT,momentary con¬
tact, center-off type) to the terminal block marked B+,
1,2,3 in the plant control box (Fig. 12). Use correct wire
size according to switch distance from plant.
LOAD WIRE CONNECTIONS
The plant nameplate shows the electrical output rating
of the plant in watts .volts, and cycles. The plant wiring
diagram shows the electrical circuits and connections
necessary for the available output voltage. Also see
Figures 13 and 14.
Meet all applicable electrical code requirements. Work
should be done by a qualified serviceman or electrician
because the installation may be inspected for official
approval. Plant control boxes have knockout sections
to accommodate load wires. Use flexible conduit and
stranded load wires near the plant to absorb vibration.
Use sufficiently large insulated wires. Strip insulation
from wire ends as necessary for clean connections. Con¬
nect each load wire to the proper generator output lead
inside the plant box. Insulate bare ends of ungrounded
wires. Use a bot (through the control box) to connect
the grounded (i) generator lead and load wire. Install
a fused main switch (or circuit breaker) between the
generating plant and load.
Figure II. Battery Connections
10