Coleman-Mach Coleman Mach 08 0125 9 Series Zone Control Box 9630A751 Heat Ready. It can control more than one RV heat pump at a time and is compatible with 9-Series Zone Control Digital Thermostats: #9330A3341 and #9330A3351. The Zone Control Box is compatible with #4500 #4700 and # 4800 Coleman-Mach Heat Pumps. It was also designed to be used with heat ready Mach series air conditioners (heat strips sold separately). Use Heat Strip #47233-4551 for the 4700 Heat Pump and Heat Strip #9233A4551 for all other Heat Pumps. The dimensions of the control box are 13-7/8" L x 4-3/8" W x 2-1/8" H. Features of Coleman-Mach 8530A751/9630A751 Coleman Mach 08 0125 9 Series Zone Control Box 9630A751 Heat Ready Voltage Rating: 12V DC Compatible with 9-Series Zone Control Digital Thermostats: #9330A3341 and #9330A3351 Compatible with #4500 #4700 and # 4800 Coleman-Mach Heat Pumps Use Heat Strip #47233-4551 for the 4700 Heat Pump and Heat Strip #9233A4551 for all other Heat Pumps Control Box Dimensions: 13-7/8" L x 4-3/8" W x 2-1/8" H Package Contents: Coleman-Mach 8530A751/9630A751 Coleman Mach 08 0125 9 Series Zone Control Box 9630A751 Heat Ready Coleman-Mach 8530A751/9630A751: Coleman Mach 08 0125 9 Series Zone Control Box 9630A751 Heat Ready