Medical treatment system and methods using a plurality of fluid lines

A heating system for a peritoneal dialysis apparatus comprising:

• a pumping apparatus configured to pump dialysate into or out of a heater bag;
• an electric heater configurable to operate at an AC line voltage in a range of about 100 to 120 volts or an AC line voltage in a range of about 200 to 240 volts;
• a controller configured to control a temperature of the dialysate using the electrical heater;
• and
• a universal power supply configured to convert line voltage to one or more DC voltages to power the pumping apparatus and controller, and to configure the electric heater to operate at a voltage in a range of about 100 to 120 volts or in a range of about 200 to 240 volts, based on a measured current flow through the electrical heater.

A method of configuring heating elements of an electrical heater for a peritoneal dialysis apparatus, the electrical heater comprising two heating elements, an end of each heating element connected to a common point, the method comprising:

• configuring the heating elements initially in a series configuration;
• connecting the electrical heater to line voltage;
• measuring electrical current flow through the electrical heater;
• determining from the measured current flow whether the line voltage is in a range of about 100-120 volts, or in a range of about 200-240 volts;
• providing a user of the peritoneal dialysis apparatus with information about the determined line voltage;
• and
• receiving a verification signal from the user before finally configuring the heating elements in either a series configuration or a parallel configuration.

A heating system for a peritoneal dialysis apparatus comprising:

• a pumping apparatus configured to pump dialysate into or out of a heater bag;
• an electric heater configurable to operate at an AC line voltage in a range of about 100 to 120 volts or an AC line voltage in a range of about 200 to 240 volts;
• a controller configured to control a temperature of the dialysate using the electrical heater;
• and
• a universal power supply configured to convert line voltage to one or more DC voltages to power the pumping apparatus and controller, and to configure the electric heater to operate at a voltage in a range of about 100 to 120 volts or in a range of about 200 to 240 volts, based on a current flow through the electrical heater measured at startup of the peritoneal dialysis apparatus.