Barge 1 switchboard distribution panel (Figure 7-14) distributes electrical power for the forced air heaters to
power panel 4 Circuit breaker P19.
Power panel 4 (Figure 7-15) provides electrical power for each of the 12 forced air heaters using circuit
breakers 1P19 thru 10P19. Electrical power for all 12 heaters may be shut off at the switchboard
distribution panel circuit breaker P19 Electrical power to any of the 12 heaters can be shut down Individually
at power panel 4 by turning off circuit breakers 1 P19 thru 10P19, as required.
7-20.2 Prestart procedures
Make sure the space around the heater being used Is unobstructed.
Make sure switchboard circuit breaker P19 is closed.
Check the heater being used for damage. Clean heater louvers and heater exterior shell as required Report any
discrepancies to shift leader or bargemaster for correction.
7-20.3 Operating procedures. To prevent ROWPU equipment and water piping from freezing during cold weather
conditions, turn forced air heater ON as required.
Set thermostat to desired temperature setting
Turn ON/OFF selector switch to ON.
If heater is ON but falls to operate, press manual reset hi-limit thermostat button. This thermostat functions as a
circuit breaker. If heater fails to restart, turn heater selector switch to OFF and check for cause of failure.
7-20.4 Shutdown procedures
Forced air heater normal shutdown procedure is to turn the ON/OFF selector switch to the OFF position.
Electrical power can also be cut off to the heaters by opening circuit breaker P19 or to any individual heater by
opening any circuit breaker 1P19 thru 10P19 (paragraph 7-20.1).
7-20.5 Emergency shutdown
7-20.5.1 General. Paragraph 3-7.9.1 explains the barge's emergency shutdown systems. Any of the total shutdown
buttons will cut off power to all of the forced air heaters on Barge 1. Any of the individual system shutdown buttons that
shut down a generator supplying power to the switchboard will also shut down all of the forced air heaters.
7-20.5.2 Emergency shutdown procedures
a. In an emergency, push the appropriate red button to shut down either all operating systems or the generator supplying
power to the switchboard.
b. When emergency situation has been corrected, reset emergency button by turning collar behind button one-quarter
turn clockwise. Button will pop out and again be in ready position.
c. When emergency button Is reset. Forced air heaters must be restarted by performing procedures in paragraph 7-20.3.