📄 MCC unit (504)
📄 Test readings, control module connections
📄 Stepping motors mixed-air (22 LH/RH)
📄 Stepping motor, air distribution (221a)
📄 Ventilation fan control (220)
📄 Solenoid valve, heat exchanger shut-off valve (581)
📄 Direct current motor, air recirculation flap (38)
📄 Circulation pump (453)