STP-301/451 Series Instruction Manual 
 
1-4
Installation 
7)  Rotational Direction Instruction Label 
 
This label indicates the rotational direction of the STP pump. 
The STP pump rotates in this direction. 
 
 
 
 
8)  Voltage Rating Label 
 
This label indicates the rated voltage of the STP control unit. 
Use voltage specified in this label. 
 
200 
V specification 
100 V specification 
 
 
 
9)  Hot Surface Warning Label 
 
This label instructs operators so as not to touch the hot surface of the STP pump. 
The use of the baking heater (optional accessory) may lead to a considerable rise in 
temperatures outside the STP pump.   
This label warns operators so as not to burn hands. (only when using the baking 
heater.)