Hupp MF510B, MF510C, MF60A-24V, MF60B-24V
RESERVOIR-Retains and heats incoming fuel during preheat cycle. Once heater is preheated, fuel passes
through reservoir into fuel regulator valve.
FUEL REGULATOR VALVE-Controls pressure, temperature, and delivery of incoming fuel. Pressure is
regulated by a needle valve. Fuel is heated by two heating elements controlled by a thermostat on the reser-
voir. The fuel is metered by passing through a calibrated nozzle at the output of the valve.
HI/LO PRESSURE REGULATOR-Allows more fuel to be delivered to heater. Similar to restriction solenoid
on Stewart-Warner heaters. Controlled by HI/LO fire relay.
VALVE RELAY-Controls shut-off solenoid operation. Overrides burner thermostat, and remains energized
until turned off at the control box.
HI/LO FIRE RELAY-Operates HI/LO pressure regulator. Controlled by HI//LO switch on control box.
FUEL HOSE AND FUEL TUBE-Flexible hose and rigid tube used to deliver fuel to heater.