Product Overview
HVAC Enthalpy Control Sensor with Relay Output – Carrier HH57ZC003
Product Condition
Unused. New in factory box with original installation instruction sheet included. No signs of installation or operational use are present.
Carefully packed and shipped same business day from our Idaho warehouse. Online since 1999. Honest equipment and straightforward service.
Product Overview
Carrier 33CSENTHSW enthalpy switch receiver, model HH57ZC003, designed for environmental sensing and control within HVAC systems. This sensor measures both ambient temperature and relative humidity, calculates air enthalpy, and converts that data into a relay output based on its configured operating mode.
By evaluating real-time air conditions rather than temperature alone, the device supports more efficient ventilation and energy management strategies. It is commonly applied in systems where economizer logic or humidity-aware control is required.
Key Features
- Carrier 33CSENTHSW enthalpy switch receiver
- Model number HH57ZC003
- Measures ambient temperature and humidity
- Calculates air enthalpy internally
- Relay output based on selected control mode
- Supports energy-optimized HVAC operation
- Supplied new in factory box with instructions
Applications
- HVAC economizer control systems
- Commercial building ventilation management
- Energy efficiency upgrades in air handling units
- Environmental monitoring within HVAC controls
- Service replacement for compatible Carrier systems
Frequently Asked Questions
What does this enthalpy switch measure?
It measures ambient temperature and humidity, then calculates enthalpy to determine an appropriate relay output.
What is the function of the relay output?
The relay output changes state based on the calculated enthalpy and the configured operating mode, allowing it to signal or control HVAC components.
Is this item unused?
Yes. It is unused and supplied new in its factory box with the original installation instruction sheet.
Is this intended for Carrier systems only?
It is designed for use in compatible Carrier HVAC control applications. System compatibility should be verified prior to installation.
Is this a sensing device or a controller?
This unit functions as a sensing and decision device, converting environmental measurements into a relay signal for external control logic.
Enthalpy control favors informed decisions over simple thresholds. This receiver translates air conditions into action, ready for its next system to interpret.
