Reznor 87001 Modulating Gas Valve for DFMUA Units

The Reznor 87001 is a Maxitrol M611R-88 modulating gas valve designed specifically for Reznor DFMUA (Direct-Fired Make-Up Air) units. This precision-engineered valve provides electronic gas flame modulation for precise temperature control in commercial and industrial heating applications.

Key Features:

• Maxitrol M611R series modulating valve with 1-inch NPT connection
• Electronic modulation provides precise, non-fluctuating temperature control without mechanical butterfly valves
• Designed for negative pressure (pull-through) applications
• Counter spring design keeps valve closed despite downward pull of negative pressure
• Set for applications up to 1.5 inches water column (not adjustable)
• Requires separate upstream pressure regulator
• Vent tap located on right side for proper installation
• Low fire configuration for optimal flame control

This OEM replacement valve is essential for maintaining proper gas flow modulation in Reznor direct-fired make-up air systems. The valve operates by applying voltage to a solenoid, which creates magnetic force on the plunger to control the main diaphragm and regulate gas flow from bypass to full modulation. Professional installation by a qualified HVAC technician is required.