As codes and efficiency standards continue to evolve, the HVAC industry needs more reliable, intelligent economizer controls. Honeywell’s JADE W7220 answers that need with improved diagnostics, sensor communication, and code compliance—all in a user-friendly package designed for today’s fast-paced field environments.
If you’re new to economizers, start with our overview: “What Is an Economizer – AKA Mixing Box?”
Why the JADE W7220 Exists
A high number of economizers in the field were found to be:
- Inoperative
- Improperly configured
- Disconnected
- Failing to provide the expected energy savings
New national, state, and local standards now require verified performance and fault detection. The JADE W7220 was designed specifically to meet these requirements and eliminate guesswork.
Supported Codes and Standards
The JADE W7220 helps meet key industry codes, including:
- ASHRAE 90.1 – Energy efficiency requirements
- ASHRAE 62.1 – Ventilation & indoor air quality
- ASHRAE 189.1 – High-performance green buildings
- IECC 2006 & 2011 – Energy conservation
- IGCC – Green construction guidelines
These standards demand accurate ventilation control, diagnostics, and energy-conscious operation. The W7220 delivers on all three.
What Makes JADE Different
Honeywell replaced the older W7212 and similar controllers with a smarter, more intuitive system. Key upgrades include:
- A large backlit LCD display
- Real-time diagnostics and error codes
- Clear, color-coded terminals and labeled wiring
- Support for multiple-speed indoor fans
- Built-in test/checkout modes—no multimeter required
- Reduced drift thanks to digital controls (no potentiometers)
This controller dramatically simplifies setup, troubleshooting, and compliance verification.
The JADE System Components
A complete JADE setup typically includes:
Required Components
- 20K Mixed Air Sensor (C7250A)
- 20K Outdoor Air Dry Bulb Sensor (C7250A)
- Damper Actuator (communicating or non-communicating)
Optional/Enhanced Components
- C7400S Sylk-bus Temperature/Humidity Sensor
- Enables dry bulb, enthalpy, or differential control
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- CO2 Sensor for DCV (Demand Control Ventilation)
- Smoke Detector for shutdown capability
- Power Exhaust connection (supports staging and low temp lockout)
MicroMetl provides compatible CO2 modules, smoke detectors, and power exhaust configurations to match most field applications.
Note: For third-party installations, ensure the correct 6-pin JADE connector is included.
Understanding “Sylk-bus” Communication
Sylk-bus is Honeywell’s proprietary communication protocol. It’s used for:
- Communicating actuators
- Communicating outdoor/return/mixed air sensors
Important notes:
- Up to 100 ft range with standard 18–22 AWG wire
- Up to 200 ft with shielded twisted pair
- No polarity sensitivity
- Cannot share Sylk-bus components across multiple controllers
Setup Notes and Field Cautions
- Upon power-up, the JADE enters a one-hour setup model
- Most sensor faults won’t trigger until this period ends
- Mixed Air Sensor faults appear immediately
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- The controller also has a five-minute power-up delay after outages
- JADE must be mounted outside the airstream for accurate readings and access
These steps prevent false alarms and ensure system stability.
Why Technicians Appreciate JADE
- Faster setup
- Better visibility into system operation
- Accurate digital sensors
- Reliable fault detection
- Reduced callbacks
When MicroMetl provides the full JADE + actuator package, we include a five-year warranty.
In Summary
The Honeywell JADE W7220 modernizes economizer management by making setup, diagnostics, and compliance straightforward. It enhances energy savings, protects equipment, and delivers the ventilation performance codes now require.
MicroMetl offers the JADE W7220 on our Standard and Ultra Low Leak Economizers and supports legacy Honeywell controllers for existing installations.
Have questions about implementing JADE on your next economizer or mixing box? Let our technical support team help you customize the right configuration.
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