(6) The engine at 3850 RPM provides three important functions. The
(4) The pump unit provides a 24 volt battery (12) to start the
engine charged alternator charges the battery (12). Engine driven belts drive
engine (8). The battery (12) is charged while the engine is being operated. The
the centrifugal pump (6) and an alternator (15); however, the belt driven alterna-
alternator is contained within the engine and is not illustrated (see
tor does not provide any electrical power to the pump unit. The output of the
TM 5-2805-259-12). The control panel ammeter battery charge gage (13) dis-
alternator is connected to the junction box (16) located on the rear of control
plays the charge or discharge rate.
panel. It supplies power through the HEATER RECEPTACLE AND SWITCH to
(5) With the tank unit connected to a water source in accordance with
the electrical power cable from the water heater.
engine is started, regulate the speed of the engine to operate at 3850 RPM as