Honeywell HP970B1007 Pneumatic Humidistat Reverse Acting

Product Description

The HONEYWELL HP970B1007 is a two-pipe, single-setpoint pneumatic humidistat designed to deliver proportional control of pneumatic valves in humidification and dehumidification systems. This reverse-acting controller responds to changes in relative humidity by modulating a pneumatic output signal, which in turn adjusts valve position to maintain the desired humidity level. Pilot-operated for high-capacity applications, the HP970B1007 is built for commercial and industrial environments where precise humidity management is critical. Licensed HVAC and controls technicians are the primary installers of this device.

The HP970B1007 is suited for commercial HVAC applications where pneumatic control systems govern humidity in large air-handling or ventilation systems. It mounts in vertical or horizontal orientation, offering installation flexibility in mechanical rooms, air handling units, and terminal equipment enclosures. The reverse-acting configuration means the pneumatic output decreases as humidity rises, making it appropriate for dehumidification valve control or other reverse-logic pneumatic circuits. Both direct-acting and reverse-acting models exist within the HP970 series to cover a range of control strategies.

Key Features

• Two-pipe pneumatic configuration for proportional humidity control
• Reverse-acting output suitable for dehumidification valve applications
• Single setpoint design for straightforward humidity control loops
• Pilot-operated construction supports high-capacity pneumatic valve actuation
• Accepts vertical or horizontal mounting orientation
• Part of the durable HP970 series designed for commercial HVAC service

Compatibility

Designed for use with pneumatic humidification and dehumidification systems that utilize pneumatic valve control. Compatible with standard two-pipe pneumatic control circuits common in commercial HVAC installations. Direct-acting and reverse-acting variants are available within the HP970 series for different system configurations.

Installation Notes

Installation should be performed by a licensed HVAC or building controls technician familiar with pneumatic control systems. Shut off the main air supply to the pneumatic control circuit before disconnecting or connecting any pneumatic tubing. Ensure supply air pressure is within the operating range specified for the HP970 series before commissioning. Follow local mechanical codes and the manufacturer wiring and tubing diagrams when integrating with existing pneumatic control panels.