Introduction
The NAVAC NX4 Nexus Digital Manifold Gauge is an advanced tool designed for HVAC diagnostics. It features a 4-valve configuration, including a 3/8" vacuum port, allowing for efficient multi-task operations and fast evacuations. The device offers wireless connectivity to Bluetooth-enabled temperature probes and micron gauges, providing comprehensive remote insights directly on its digital screen. The NX4 is built with a robust aluminum body and an impact-resistant rubber cover for durability in field conditions, ensuring precise readings with Class 0.4 accuracy.
Safety Information
- Always wear appropriate personal protective equipment (PPE), including safety glasses and gloves, when working with refrigerants.
- Ensure proper ventilation in the work area to prevent accumulation of refrigerant gases.
- Do not expose the manifold gauge to extreme temperatures or direct sunlight for prolonged periods.
- Verify that all connections are secure before pressurizing the system.
- Refer to local regulations and industry standards for safe handling of refrigerants.
- Do not attempt to disassemble or repair the unit yourself. Contact qualified service personnel.
Package Contents
The NAVAC NX4 package includes the following items:
- NAVAC NX4 Digital Manifold Gauge Unit
- Bluetooth Temperature Clamp NST1 (Low Side)
- Bluetooth Temperature Clamp NST2 (High Side)
- Charging Cable (USB-A to USB-C)
- Carry Case
Figure 1: The NAVAC NX4 Digital Manifold Gauge, showcasing its digital display and four valve configuration.
Figure 2: The included Bluetooth Temperature Clamps (NST1 and NST2) for wireless temperature measurements.
Setup
- Charging the Unit: Connect the provided USB-A to USB-C charging cable to the NX4 unit and a suitable USB power adapter. Ensure the unit is fully charged before first use. A full charge typically takes several hours.
- Powering On: Press and hold the power button on the manifold gauge until the digital display illuminates.
- Connecting Temperature Clamps:
- Ensure the Bluetooth temperature clamps (NST1 and NST2) are powered on.
- The NX4 will automatically attempt to pair with nearby NAVAC Bluetooth devices. Follow on-screen prompts if any pairing confirmation is required.
- Attach the NST1 (Low Side) clamp to the suction line and the NST2 (High Side) clamp to the liquid line of the HVAC system.
- Hose Connections:
- Connect the appropriate refrigerant hoses to the 1/4" SAE ports for suction line, liquid line, and refrigerant recovery/charging.
- Utilize the dedicated 3/8" SAE vacuum port for fast evacuation procedures.
- App Integration (Optional): Download the MyNAVAC App from your device's app store. Connect the NX4 to the app via Bluetooth for advanced features, data logging, and firmware updates.
Operating Modes
The NAVAC NX4 offers four distinct operational modes to cover various HVAC diagnostic and service needs. Use the MODE button to cycle through them and the ENTER button to confirm selections.
- Manifold Mode:
This is the primary mode for real-time pressure and temperature readings. It displays high-side and low-side pressures, saturation temperatures, superheat, and subcooling values. Ideal for general system analysis and charging.
- Leak Test Mode:
Used to detect leaks in a system. The manifold gauge monitors pressure changes over a set period. If the pressure drops beyond a configurable threshold, it indicates a potential leak.
- Evacuation Mode:
Designed for monitoring the vacuum level during system evacuation. It displays the current vacuum pressure, helping technicians ensure the system reaches the desired deep vacuum level before charging.
- Decay Test Mode:
After evacuation, this mode helps confirm the integrity of the vacuum. It monitors for any pressure rise over time, which would indicate moisture or non-condensable gases remaining in the system, or a leak.
Maintenance
- Cleaning: Wipe the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure no liquid enters the ports or display.
- Storage: Store the manifold gauge and accessories in the provided carry case in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: For optimal battery life, charge the unit regularly, even if not in frequent use. Avoid completely draining the battery for extended periods.
- Firmware Updates: Periodically check the NAVAC website or the MyNAVAC App for available firmware updates to ensure optimal performance and access to new features.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | Low or depleted battery. | Charge the unit using the provided charging cable. |
| Temperature clamps not connecting. | Clamps are off or out of range; Bluetooth interference. | Ensure clamps are powered on and within range. Restart both the manifold and clamps. Reduce interference. |
| Inaccurate pressure readings. | Hoses not properly connected; sensor calibration issue. | Check all hose connections for leaks. If problem persists, contact support for calibration. |
| Display is dim or unreadable. | Low battery; backlight setting. | Charge the unit. Adjust backlight settings if available in the menu. |
Specifications
| Feature | Detail |
|---|---|
| Model | NX4 |
| Accuracy Class | 0.4 |
| Operational Modes | Manifold, Leak Test, Evacuation, Decay Test |
| Ports | (1) 3/8" SAE vacuum, (3) 1/4" SAE (suction, liquid, recovery/charging) |
| Maximum Manifold Pressure | 1087 psi (7500 kPa) |
| Power Supply | Rechargeable 3000mAh lithium battery |
| Product Dimensions (L x W x H) | 13.39 x 4.92 x 14.53 inches |
| Item Weight | 12 Pounds |
| Material | Aluminum, Rubber |
| Firmware Updates | Via NAVAC website or MyNAVAC App |
Compatible Refrigerant Types
The NAVAC NX4 is compatible with a wide range of refrigerants, including but not limited to:
R-11, R-12, R-13, R-22, R-23, R-32, R-113, R-114, R-115, R-116, R-123, R-124, R-125, R134a, R-236fa, R-245fa, R-290, R-401A, R-401B, R-402A, R-402B, R-403B, R-404A, R-406A, R-407A, R-407B, R-407C, R-408A, R-409A, R-410A, R-413A, R-414A, R-414B, R-416A, R-417A, R-417C, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-427A, R-428A, R-434A, R-437A, R-438A, R-448A, R-449A, R-450A, R-452A, R-452B, R-453A, R-454B, R-458A, R-500, R-501, R-502, R-503, R-507A, R-508B, R-513A, R-600, R-600a, R-601, R-601a, R-744*, R-1233zd, R-1234yf, R-1234ze.
*Note: For R-744, maximum pressure is 1087psi (7500kPa).
Warranty
The NAVAC NX4 Digital Manifold Gauge comes with a 2-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. For detailed warranty terms and conditions, please refer to the official NAVAC website or contact customer support.
Support
For technical assistance, troubleshooting, or service inquiries, please contact NAVAC customer support. You can find contact information and additional resources on the official NAVAC website: www.navacglobal.com.
Firmware updates and additional app functionalities are available through the MyNAVAC App.
Official Product Videos
No official product videos from the seller were provided in the product data for embedding in this manual.
