R-434A
R125/R143a/R…R-434A is a zeotropic blend used as an R-22 replacement in water chillers and medium temperature refrigeration systems with improved efficiency characteristics.
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Key Information
Essential safety and exposure information for R-434A
Health Effects
Low toxicity. Contains small amount of flammable R-600a component. May cause cardiac sensitization.
Common Sources
- Water chillers
- medium temperature refrigeration
- commercial HVAC
Exposure Limits
- WEEL
- 1,000 ppm (8-hr TWA)
- No OSHA/NIOSH limit
- No OSHA/NIOSH limit
- Blend with R125/R143a
- Blend with R125/R143a
Regulatory Status
- EPA SNAP
- Acceptable substitute
- ASHRAE 34
- A1 Safety Classification
- GWP
- 3245
- ODP
- 0
- DOT
- Class 2.2 Non-flammable, UN3163
- F-Gas Regulation
- Phase-down applies
Detection Requirements
- Sensor Technology
- Infrared (NDIR)
- Detection Range
- 0-1,000 ppm (typical)
- Response Time
- <60 seconds (T90)
- Cross-Sensitivity
- Test for blend-specific response
- Calibration
- Annual with target gas recommended
Detection Solutions
Sensors and detectors for R-434A monitoring
cGas Detector VRF IR Refrigerant Transmitter
An aesthetic, non-dispersive infrared refrigerant gas detector for acute leak detection in modern energy-efficient buildings utilizing Variable Refrigerant Flow (VRF) HVAC systems.
cGas-SC Self-Contained Controller
A self contained controller with up to 3 gas channels, Plug & Play Smart Sensor Technology and configurable logic control and priority settings. Offers superior user customization and reliable gas detection performance for monitoring many gases.
cGas Detector IR Refrigerant Transmitter
Non-dispersive infrared refrigerant gas detector with accurate, low level leak detection, available with analog output or BACnet® or Modbus® output and Plug & Play Smart Sensor Technology.
FCS Multi Channel System Controllers
High performance controller with logic and priority settings for monitoring toxic, combustible and refrigerant gases with versatile control functionality. Available with Modbus® or BACnet® communication with BAS, supports 4-20 mA and Modbus® driven VFDs.