PRINCIPLES OF OPERATION (CONT) - TM-3-4230-209-20-P0022

TM 3-4230-209-20&P

1-12

(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.

procedures in TM 3-4230-209-10, the engine can be safely started. Once the

engine is started, regulate the speed of the engine to operate at 3850 RPM as

indicated on the control panel tachometer (14).