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RED-4 | DuroZone 4-Zone HVAC Control Panel with Fresh Air and Multi-Stage Logic
- Regular price
- $387.00
- Sale price
- $387.00
- Regular price
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Product Description P/N: RED-4
Description
The RED-4 is a four-zone HVAC control panel that manages multiple thermostats and dampers in residential or commercial zoning systems. It can coordinate conventional, gas/electric, or heat pump systems with two-stage cooling and up to three-stage heating. The board supports fresh air integration, multi-stage limits, and emergency heat override for flexible and efficient temperature control.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | DuroZone / Duro Dyne |
| Category | HVAC Controls |
| Part Number | RED-4 (Model / Part # 35234) |
| Subcategory | Zone Control Panel |
| Zones Supported | 4 zones (or 3 zones with 4th as fresh air) |
| One-Zone Mode | Yes (all dampers follow Zone 1) |
| Control System Types | Gas/electric, hydronic, electric, conventional/dual fuel heat pumps |
| Stages (Heat / Cool) | Up to 3 heat / 2 cool (gas systems); 2 heat / 2 cool (heat pumps) |
| Fresh Air Mode | Zone 4 can be used as fresh air damper (timer controlled) |
| Outdoor Temperature Limit | Yes (ODT limit disables second stage heat) |
| Supply Air Limit | Heating and cooling supply air limits (potentiometer) |
| Emergency Heat Switch | Onboard / external override support |
| Purge Option | Fan purge cycle for ~90 seconds post cycle |
| DIP Switch Configurable Options | System type, thermostat type, purge, capacity limit, ODT, etc. |
| Communication / Inputs | Standard 24 VAC thermostat wiring (R, C, G, Y, W, O, etc.) |
| Damper Control Outputs | 24 VAC open/close or spring return dampers |
| Power Supply Requirement | 24 VAC independent transformer (recommended 40 VA) |
| Fuse / Protection | Internal fuse / breaker for damper/thermostat circuits |
| LED Indicators | Heat, Cool, Fan, Status, SA Limit, ODT Limit, etc. |
| Automatic Test Mode | Contractor test mode for verifying operation of dampers & zones |
| Operating Temperature | (Not explicitly stated, typical ambient indoor range) |
| Housing / Mounting | Enclosed control panel for indoor installation |
| Dimensions | 7.125 in × 6.5 in × 3.5 in |
| Weight | 1.36 lbs |
Information About RED-4
The RED-4 panel is a microprocessor-based control module used in multi-zone HVAC applications to route heating, cooling, and fan commands to zone dampers and the HVAC unit logic. It accommodates conventional or heat pump thermostats (especially on zone 1), supports an optional outdoor temperature sensor to limit multi-stage operation, and includes a DIP-switch configuration scheme to adapt to different system types. Zone 4 can optionally serve as a fresh air damper control rather than a conditioned zone. The control logic includes purge cycles, stage timers, capacity limiting, and emergency heat switching for precise and safe system operation.
Key Features:
- Four-Zone Control: Coordinates up to 4 independent zones, each with a thermostat and damper, improving comfort and efficiency.
- One-Zone Mode: Allows control of all dampers simultaneously based on Zone 1 thermostat — useful for vacation mode or single zone operation.
- Fresh Air Damper Function: Zone 4 can be designated as a fresh air intake damper, with an internal timer controlling minutes-per-hour fresh air.
- Outdoor Temp Limit (ODT): Disables second-stage heating when outdoor temperature is higher than a configurable ODT Limit, saving energy.
- Stage Control Logic: Supports 3-stage heating / 2-stage cooling for gas/electric systems; supports 2-stage heat + 2-stage cool for heat pumps.
- Emergency Heat Override: Built-in external emergency heat switch lets emergency heating be commanded regardless of thermostat type.
- Supply Air Temp Limits: Includes heating and cooling limit potentiometers: if supply air exceeds (or drops below) these limits, system staging is inhibited or turned off.
- Automatic Purge Cycle: At end of heating or cooling calls, fan runs for set time to purge residual air from ductwork.
- Configurable via DIP Switches: Panel is configurable for system type (gas/electric, heat pump, dual fuel), thermostat type, purge, capacity limiting, etc.
- Built-in Protection & Diagnostics: Includes internal circuit protection (breaker/fuse), LED status indicators (Heat, Cool, Fan, ODT, SA Limit, etc.), and an Automatic Contractor Test mode to validate damper and thermostat operation.
The RED-4 delivers the flexibility, control logic, and safety features required for robust HVAC zoning systems.
Description
The RED-4 is a four-zone HVAC control panel that manages multiple thermostats and dampers in residential or commercial zoning systems. It can coordinate conventional, gas/electric, or heat pump systems with two-stage cooling and up to three-stage heating. The board supports fresh air integration, multi-stage limits, and emergency heat override for flexible and efficient temperature control.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | DuroZone / Duro Dyne |
| Category | HVAC Controls |
| Part Number | RED-4 (Model / Part # 35234) |
| Subcategory | Zone Control Panel |
| Zones Supported | 4 zones (or 3 zones with 4th as fresh air) |
| One-Zone Mode | Yes (all dampers follow Zone 1) |
| Control System Types | Gas/electric, hydronic, electric, conventional/dual fuel heat pumps |
| Stages (Heat / Cool) | Up to 3 heat / 2 cool (gas systems); 2 heat / 2 cool (heat pumps) |
| Fresh Air Mode | Zone 4 can be used as fresh air damper (timer controlled) |
| Outdoor Temperature Limit | Yes (ODT limit disables second stage heat) |
| Supply Air Limit | Heating and cooling supply air limits (potentiometer) |
| Emergency Heat Switch | Onboard / external override support |
| Purge Option | Fan purge cycle for ~90 seconds post cycle |
| DIP Switch Configurable Options | System type, thermostat type, purge, capacity limit, ODT, etc. |
| Communication / Inputs | Standard 24 VAC thermostat wiring (R, C, G, Y, W, O, etc.) |
| Damper Control Outputs | 24 VAC open/close or spring return dampers |
| Power Supply Requirement | 24 VAC independent transformer (recommended 40 VA) |
| Fuse / Protection | Internal fuse / breaker for damper/thermostat circuits |
| LED Indicators | Heat, Cool, Fan, Status, SA Limit, ODT Limit, etc. |
| Automatic Test Mode | Contractor test mode for verifying operation of dampers & zones |
| Operating Temperature | (Not explicitly stated, typical ambient indoor range) |
| Housing / Mounting | Enclosed control panel for indoor installation |
| Dimensions | 7.125 in × 6.5 in × 3.5 in |
| Weight | 1.36 lbs |
Information About RED-4
The RED-4 panel is a microprocessor-based control module used in multi-zone HVAC applications to route heating, cooling, and fan commands to zone dampers and the HVAC unit logic. It accommodates conventional or heat pump thermostats (especially on zone 1), supports an optional outdoor temperature sensor to limit multi-stage operation, and includes a DIP-switch configuration scheme to adapt to different system types. Zone 4 can optionally serve as a fresh air damper control rather than a conditioned zone. The control logic includes purge cycles, stage timers, capacity limiting, and emergency heat switching for precise and safe system operation.
Key Features:
- Four-Zone Control: Coordinates up to 4 independent zones, each with a thermostat and damper, improving comfort and efficiency.
- One-Zone Mode: Allows control of all dampers simultaneously based on Zone 1 thermostat — useful for vacation mode or single zone operation.
- Fresh Air Damper Function: Zone 4 can be designated as a fresh air intake damper, with an internal timer controlling minutes-per-hour fresh air.
- Outdoor Temp Limit (ODT): Disables second-stage heating when outdoor temperature is higher than a configurable ODT Limit, saving energy.
- Stage Control Logic: Supports 3-stage heating / 2-stage cooling for gas/electric systems; supports 2-stage heat + 2-stage cool for heat pumps.
- Emergency Heat Override: Built-in external emergency heat switch lets emergency heating be commanded regardless of thermostat type.
- Supply Air Temp Limits: Includes heating and cooling limit potentiometers: if supply air exceeds (or drops below) these limits, system staging is inhibited or turned off.
- Automatic Purge Cycle: At end of heating or cooling calls, fan runs for set time to purge residual air from ductwork.
- Configurable via DIP Switches: Panel is configurable for system type (gas/electric, heat pump, dual fuel), thermostat type, purge, capacity limiting, etc.
- Built-in Protection & Diagnostics: Includes internal circuit protection (breaker/fuse), LED status indicators (Heat, Cool, Fan, ODT, SA Limit, etc.), and an Automatic Contractor Test mode to validate damper and thermostat operation.
The RED-4 delivers the flexibility, control logic, and safety features required for robust HVAC zoning systems.