including models like the 15-B2 through 175-B3

and circulator blower

This Goodman blower wheel is constructed with galvanized steel for corrosion resistance and balanced to minimize vibration

It indicates that the electrical contacts will close (connecting the circuit) when the negative pressure (vacuum) reaches the specified setpoint of -

Copeland 998-0520-00 Motor Protector 30067439-890 including models like the 15-B2The Copeland 998 0520 00 Motor Protector is a critical 120V electronic safety module designed to safeguard high performance compressors from thermal overload and electrical faults. As a veteran grade HVAC compressor protection device, this unit effectively monitors motor winding temperatures and interrupts the control circuit during excessive current or short circuit events. This specific Copeland 120V motor protector is the designated replacement for