Johnson Controls · Equipment controller
Johnson Controls W43A-14C Room Humidistat
SPDT room humidistat with a 0–70% RH setpoint range for humidifying or dehumidifying control.
Will this work with my system?
Match your equipment to these requirements before ordering.
System requirements
- Electrical load limits: Full load: 6 A at 120 V AC; 3.5 A at 208 V AC; 3 A at 240 V AC. Locked rotor: 36 A at 120 V AC; 21 A at 208 V AC; 18 A at 240 V AC. Pilot duty: 125 VA at 24/277 V AC.
- Sensor input: Human-hair humidity sensing element
Check before you buy
- Match the full W43A-14C model number and hardware revision to the manufacturer's equipment manual and accessory list.
- Compare the equipment terminals, control voltage and required operating sequence with the model-specific installation diagrams.
Manufacturer documentation (1)
Use these documents to compare your exact model and configuration.
The W43A-14C switches humidifying or dehumidifying equipment according to room relative humidity. Its mechanical sensing element operates snap-action SPDT contacts, with an approximately 6% RH fixed differential.
The unit includes a vertical faceplate and an additional horizontal faceplate. Adjustable upper and lower stops restrict the setting range or lock the dial. Mount it on a 2 x 4 in. wall box in a representative location, following the technical bulletin.
This is an operating humidity control. Where failure could cause injury or property loss, the manufacturer requires appropriate independent protective controls or warning systems.
Product details
- Manufacturer
- Johnson Controls
- SKU
- 577240
- Model / MPN
- W43A-14C
- Condition
- New
- Lifecycle
- Current
Specifications
- Mounting methods
- Vertical or horizontal 2 x 4 in. wall box
- Dimensions
- 4.71 x 2.96 x 2.94 in. (H x W x D)
- Setpoint limits
- Adjustable high and low stops; dial lock possible
- Contact ratings
- Full load: 6 A at 120 V AC; 3.5 A at 208 V AC; 3 A at 240 V AC. Locked rotor: 36 A at 120 V AC; 21 A at 208 V AC; 18 A at 240 V AC. Pilot duty: 125 VA at 24/277 V AC.
- Humidity control modes
- Humidification or dehumidification; 0–70% RH setpoint range
- Control sequence
- SPDT snap-action switching; fixed differential approximately 6% RH
- Sensor characteristic
- Human-hair humidity sensing element
- Switch configuration
- SPDT