1. Introduction
The Elitech LMG-10 is a professional digital manifold gauge set designed for HVAC/R system maintenance, installation, and troubleshooting. It provides precise measurements for pressure, temperature, and vacuum, supporting a wide range of refrigerants. This manual provides detailed instructions for the proper setup, operation, and maintenance of your LMG-10 unit.
Figure 1.1: Elitech LMG-10 Digital Manifold Gauge Set. The set includes the main digital manifold unit, three color-coded refrigerant charging hoses (red, yellow, blue), and two temperature clamps.
2. Key Features
The Elitech LMG-10 offers a comprehensive set of features for efficient HVAC/R system analysis:
- Temperature Compensation: Monitors pressure holding and vacuum leakage tests with precise temperature compensation.
- Multi-Refrigerant Support: Supports 88 types of refrigerants for broad application.
- Automatic Calculations: Auto-calculation of superheating and subcooling values.
- Multiple Units: Supports 5 pressure units (psi, kg/cm², kPa, MPa, bar) and 2 temperature units (°F/°C).
- User-Friendly Design: Features a large, easy-to-read display and an auto-off function for power saving.
- Durable Hoses: Includes 3 x 59" (1.5m) A/C charging hose set with heavy-duty brass connections, rated for 500 PSI working pressure and 4000 PSI burst pressure.
Figure 2.1: Overview of Elitech LMG-10 features, highlighting temperature compensation, 88 refrigerant types, superheating & subcooling calculation, large display, compact design, and extended battery life.
3. Package Contents
Verify that all items are present in your package:
- 1 x Elitech LMG-10 Digital Manifold Gauge
- 3 x Refrigerant Charging Hoses (Red, Yellow, Blue)
- 2 x Temperature Clamps
- 1 x User Manual
4. Product Components and Specifications
4.1. Main Unit Components
Figure 4.1: Labeled diagram of the Elitech LMG-10 Digital Manifold Gauge. Key components include the LCD screen, temperature probe port, integrated hook, battery compartment, warning label, control buttons, sight glass, control valves, refrigerant hose brackets, and refrigerant hose fittings.
4.2. Refrigerant Hoses
The included refrigerant hoses are designed for durability and safety:
- Length: 59 inches (1.5 meters)
- Screw Thread: 1/4" SAE – 1/4" SAE
- Working Pressure: 500 PSI (Hoses are rated for 800 PSI max working pressure)
- Burst Pressure: 4000 PSI
- Color Coding: Red for high pressure, Blue for low pressure, Yellow for refrigerant charging.
Figure 4.2: Refrigerant charging hoses, showing their length and thread type.
Figure 4.3: Close-up view of the hose connections, indicating their working and burst pressure ratings.
Figure 4.4: Color-coded hoses for easy identification of their function: Red for high pressure, Blue for low pressure, and Yellow for refrigerant.
4.3. Technical Specifications
Figure 4.5: Physical dimensions and key technical specifications of the LMG-10 unit.
| Specification | Value |
|---|---|
| Model | LMG-10 |
| Measuring Range | -14.5 to 800 psi |
| Accuracy | ±0.5% FS |
| Pressure Units | psi, kg/cm², kPa, MPa, bar |
| Temperature Units | °F / °C |
| Working Temperature Range | 14°F ~ 122°F (-10°C ~ 50°C) |
| Battery Life | Approx. 200 hours |
| Power Supply | 3 x AA Batteries |
| Dimensions (approx.) | 18 cm (H) x 10 cm (W) x 4.5 cm (D) |
| Weight (approx.) | 0.95 kg |
| Material | Brass (fittings) |
5. Setup and Initial Use
5.1. Battery Installation
- Locate the battery compartment on the back of the LMG-10 unit.
- Open the battery cover.
- Insert three (3) AA batteries, ensuring correct polarity (+/-).
- Close the battery cover securely.
Figure 5.1: Illustration of battery installation and various display modes.
5.2. Connecting Temperature Clamps
- Connect the temperature clamps to the designated temperature probe ports on the LMG-10 unit.
- Attach the clamps securely to the refrigerant lines to measure pipe temperature.
5.3. Connecting Hoses
- Identify the high-pressure (red), low-pressure (blue), and refrigerant (yellow) hoses.
- Connect the appropriate ends of the hoses to the corresponding ports on the LMG-10 manifold.
- Connect the other ends of the hoses to the HVAC/R system service ports or refrigerant tank as required for your task.
- Ensure all connections are tight to prevent leaks.
6. Operating Instructions
6.1. Power On/Off
- Press the Power button (symbol: circle with vertical line) to turn the unit ON.
- Press and hold the Power button to turn the unit OFF.
6.2. Unit Selection (Pressure and Temperature)
- Press the MODE button to cycle through pressure units (psi, kg/cm², kPa, MPa, bar).
- Press the °F/°C button to switch between Fahrenheit and Celsius temperature units.
6.3. Refrigerant Selection
The LMG-10 supports 88 types of refrigerants. To select the desired refrigerant:
- Press the MODE button until the refrigerant selection mode is active.
- Use the arrow buttons (left/right arrows) to scroll through the list of available refrigerants.
- Confirm your selection.
Figure 6.1: The LMG-10's display showing the extensive list of 88 supported refrigerants.
6.4. Pressure and Temperature Measurement
Once connected and powered on, the LMG-10 will display real-time pressure and temperature readings. The display shows high-side and low-side pressures, as well as saturation temperatures for the selected refrigerant.
6.5. Vacuum Measurement
The LMG-10 can monitor vacuum levels during evacuation processes. Refer to the display for vacuum readings and progress.
6.6. Superheating and Subcooling Calculation
The device automatically calculates superheating (SH) and subcooling (SC) values based on the measured pressures and temperatures, providing critical data for system analysis.
Figure 6.2: Various display screens of the LMG-10, illustrating pressure and temperature measurement, vacuum measurement, temperature compensation, and automatic calculation of superheating/subcooling.
6.7. Auto-Off Settings
To conserve battery life, the LMG-10 features an adjustable auto-off function. You can set the auto-off time to 5, 10, 15, 30, or 60 minutes.
7. Maintenance and Care
7.1. Cleaning
- Wipe the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Ensure the ports and connections are free from debris.
7.2. Battery Replacement
Replace batteries when the low battery indicator appears on the display. Follow the instructions in Section 5.1.
7.3. Storage
- When not in use for an extended period, remove the batteries to prevent leakage and damage to the unit.
- Store the LMG-10 in a cool, dry place, away from direct sunlight and extreme temperatures.
8. Troubleshooting
If you encounter issues with your Elitech LMG-10, refer to the table below for common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on | Dead or incorrectly installed batteries | Replace batteries with new ones, ensuring correct polarity. |
| Inaccurate pressure readings | Loose hose connections; Sensor calibration needed; Incorrect refrigerant selected | Check and tighten all hose connections. If issue persists, contact customer support for calibration guidance. Verify the correct refrigerant is selected. |
| Temperature clamps not reading | Clamps not properly connected; Damaged clamp cable | Ensure clamps are fully plugged into the ports. Inspect cable for damage. |
| Display is dim or flickering | Low battery power | Replace batteries. |
If the problem persists after attempting these solutions, please contact Elitech customer support.
9. Warranty and Customer Support
Elitech Technology Inc. provides a 12-month warranty for the LMG-10 Digital Manifold Gauge Set from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For technical assistance, warranty claims, or any other inquiries, please contact Elitech customer support. Elitech offers 24/7 customer support service via email and phone.
Figure 9.1: Elitech customer support is available 24/7.
You can find more information and contact details on the official Elitech website or through their Amazon store: Elitech Amazon Store.
