W7459A1001 | Honeywell Economizer Logic Module
Honeywell · Industrial Automation & Electrical
Description The Honeywell W7459A1001 is a compact, solid-state economizer logic module that integrates with M7415 or M8405 damper actuators and enthalpy or discharge air sensors. Technical Specifications Condition New/Never Used Surplus Brand Honeywell Category HVAC Part Number W7459A1001 Subcategory HVAC Accessory & Rebuild Kit & Seal Kit Technology Solid-State Relay Type 2 SPDT Relays Sensor Compatibility C7400A Solid-State Enthalpy Sensor Frequency 50/60 Hz Contact Ratings 3.5 A Inrush @ 24 VAC (1.5 A continuous) Output Proportional output to M7415 actuator Operating Temperature Range (°F) –40°F to +125°F Operating Temperature Range (°C) –40°C to +52°C Humidity Rating 5–95% RH (non-condensing) CE Compliance CE Report GV97-010 Height 103 mm (4-1/16″) Width 71 mm (2-13/16″) Depth 32 mm (1-1/4″) Weight 0.31 lbs Information About W7459A1001 The Honeywell W7459A1001 is a solid-state economizer logic module designed to optimize free cooling in commercial HVAC systems by proportionally controlling outdoor and return air dampers. Compatible with Honeywell M7415 and M8405 actuators, this module integrates enthalpy or temperature sensor inputs to automate ventilation and cooling decisions based on environmental conditions. With built-in adjustment features and a compact design, the W7459A1001 enhances energy efficiency and comfort in rooftop units and air-handling systems. Though discontinued, it remains in service across many legacy installations. Key Features: Precision Damper Control: Interfaces directly with M7415 or M8405 actuators to modulate damper positions based on sensor inputs, optimizing ventilation and maximizing use of outdoor air for free cooling. Enthalpy & Differential Sensing: Compatible with C7400A solid-state enthalpy sensors, and supports an optional second sensor for return air—enabling accurate differential control based on humidity and temperature conditions. Built-in Minimum Position Potentiometer: Features an onboard adjustment dial to set the minimum damper position for maintaining ventilation requirements during non-economizer operation. Supports optional remote potentiometers for added flexibility. Compressor Staging & LED Feedback: Equipped with 2 SPDT relays to support compressor staging and a status LED to indicate economizer operation—helping technicians verify system performance at a glance. Robust Environmental Ratings: Operates from –40°F to +125°F (–40°C to +52°C) and 5–95% RH non-condensing, making it suitable for outdoor rooftop unit installations and harsh mechanical room environments. Compact, CE-Certified Design: Housed in a small 103 mm × 71 mm × 32 mm module, with CE certification (Report GV97-010) and 24 VAC 50/60 Hz operation. Relay contact rated at 3.5 A inrush at 24 VAC. The W7459A1001 delivers effective, reliable economizer logic for systems requiring solid-state damper control and enthalpy-based free cooling. Its compact design, proportional modulation capability, and sensor compatibility have made it a dependable component in countless rooftop HVAC systems, even after its discontinuation. For modern replacements, Honeywell’s JADE series controllers offer expanded capabilities and BACnet support.
Brand: Honeywell · Category: Industrial Automation & Electrical
Key features
- Precision Damper Control: Interfaces directly with M7415 or M8405 actuators to modulate damper positions based on sensor inputs, optimizing ventilation and maximizing use of outdoor air for free cooling.
- Enthalpy & Differential Sensing: Compatible with C7400A solid-state enthalpy sensors, and supports an optional second sensor for return air—enabling accurate differential control based on humidity and temperature conditions.
- Built-in Minimum Position Potentiometer: Features an onboard adjustment dial to set the minimum damper position for maintaining ventilation requirements during non-economizer operation. Supports optional remote potentiometers for added flexibility.
- Compressor Staging & LED Feedback: Equipped with 2 SPDT relays to support compressor staging and a status LED to indicate economizer operation—helping technicians verify system performance at a glance.
- Robust Environmental Ratings: Operates from –40°F to +125°F (–40°C to +52°C) and 5–95% RH non-condensing, making it suitable for outdoor rooftop unit installations and harsh mechanical room environments.
- Compact, CE-Certified Design: Housed in a small 103 mm × 71 mm × 32 mm module, with CE certification (Report GV97-010) and 24 VAC 50/60 Hz operation. Relay contact rated at 3.5 A inrush at 24 VAC.
Specifications
| Manufacturer part number | W7459A1001 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Honeywell |
| Category | HVAC |
| Part Number | W7459A1001 |
| Subcategory | HVAC Accessory & Rebuild Kit & Seal Kit |
| Technology | Solid-State |
| Relay Type | 2 SPDT Relays |
| Sensor Compatibility | C7400A Solid-State Enthalpy Sensor |
| Frequency | 50/60 Hz |
| Contact Ratings | 3.5 A Inrush @ 24 VAC (1.5 A continuous) |
| Output | Proportional output to M7415 actuator |
| Operating Temperature Range (°F) | –40°F to +125°F |
| Operating Temperature Range (°C) | –40°C to +52°C |
| Humidity Rating | 5–95% RH (non-condensing) |
| CE Compliance | CE Report GV97-010 |
| Height | 103 mm (4-1/16″) |
| Width | 71 mm (2-13/16″) |
| Depth | 32 mm (1-1/4″) |
| Weight | 0.31 lbs |
| Product type | Economizer Logic Module |
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