CMTOOL Digital HVAC Manifold Gauge Set

1. Introduction

The CMTOOL Digital HVAC Manifold Gauge Set is designed for the installation, testing, and maintenance of refrigeration equipment such as air conditioners, refrigerators, and cold storage units. This manual provides essential information for safe and effective operation.

1.1 Contenu du paquet

• 1 x Digital Manifold Gauge Unit
• 3 x Standard Test Hoses (1.5m)
• 2 x Température Clamps
• 1 x Portable Toolbox
• 1 x Manuel d'utilisation

Image: Components included in the CMTOOL Digital HVAC Manifold Gauge Set.

2. Consignes de sécurité

Respectez toujours les consignes de sécurité suivantes afin d'éviter les blessures ou les dommages matériels :

• Portez un équipement de protection individuelle (EPI) approprié, notamment des lunettes de sécurité et des gants, lors de la manipulation de fluides frigorigènes.
• Assurez une ventilation adéquate lors de la manipulation de fluides frigorigènes.
• Do not exceed the maximum operating pressure of the hoses (600 PSI / 4.13 MPa). The limit pressure is 3000 PSI.
• Verify that all connections are secure before applying pressure.
• Avoid direct contact with refrigerants, as they can cause frostbite.
• Gardez l’appareil à l’abri de l’eau et des températures extrêmes.
• Ensure the temperature sensor clips are properly connected for accurate readings.

3. caractéristiques du produit

The CMTOOL Digital HVAC Manifold Gauge Set offers several advanced features for HVAC professionals:

• Dual Pressure and Dual Temperature Measurement: Simultaneously measures two pressures (gauge pressure) and two temperatures.
• Automatic Unit Conversion: Supports automatic conversion for pressure (kPa, MPa, Psi, Bar, InHg) and temperature (Celsius/Fahrenheit).
• High-Precision Data Unit: Features a built-in 32-bit digital processing unit and high-precision data acquisition for stable and accurate readings.
• Base de données sur les fluides frigorigènes : Contains a built-in database of 89 refrigerants, allowing for direct reading of pressure-evaporation temperature, superheat, and subcooling.
• Mesure du vide : Tests the percentage of vacuum.
• Test de fuite de pression : Calculates pressure difference over time to detect refrigerant leaks.
• Construction durable : Made with high-strength engineering plastics and flexible non-slip silicone for durability and comfortable handling.
• Viewable Window and LCD Display: Allows direct observation of refrigerant charging status and features a 7.5CM×4CM LCD with backlight for clear data reading.

Image : Terminéview of the digital manifold gauge set's key features.

Image: Comprehensive list of 89 refrigerants supported by the device.

4. Installation

4.1 Identification des composants

Image: Labeled diagram of the digital manifold gauge components and dimensions.

1. Clamp-sur la prise de la sonde de température
2. Écran LCD
3. Bouton de fonction
4. Bouton Marche/Arrêt
5. Boutons de sélection du type de réfrigérant R+/R-
6. Bouton d'unité
7. Bouton zéro
8. Bouton rétroéclairé
9. Bouton ° C / ° F
10. Bouton d'alimentation
11. Vanne basse pression
12. Fenêtre d'observation du réfrigérant
13. Entrée basse pression 1/4 pouce
14. Vanne haute pression
15. Soupape de décharge de pression
16. Entrée haute pression 1/4 pouce
17. Entrée de réfrigérant / Entrée de pompe à vide

4.2 Connecting Hoses and Clamps

1. Connect the appropriate test hoses to the low pressure inlet (14), high pressure inlet (17), and refrigerant/vacuum pump inlet (18) on the manifold gauge.
2. Attach the other ends of the hoses to the service ports of the HVAC system.
3. Branchez le thermostatamps into the Clamp-on Temperature Probe Sockets (1).
4. Fixez solidement le capteur de températureamps to the refrigerant pipes to measure pipe surface temperature.

5. Mode d'emploi

5.1 Mise sous/hors tension et rétroéclairage

• Press the Power Button (11) to turn the device on or off.
• Press the Backlit Button (9) to activate or deactivate the LCD backlight for improved visibility in low-light conditions.

5.2 Selecting Refrigerant Type

• Use the R+/R- Refrigerant Type Selection Buttons (6) to scroll through the built-in refrigerant database and select the refrigerant being used (e.g., R134A, R410A).

5.3 Mesure de la pression et de la température

The device displays dual pressure and dual temperature readings simultaneously.

• Ensure hoses and temperature clamps sont correctement connectés.
• The LCD Display (2) will show T1 and T2 temperatures, along with corresponding pressures.
• Press the Unit Button (7) to cycle through different pressure units (kPa, MPa, Psi, Bar, InHg).
• Press the °C/°F Button (10) to switch between Celsius and Fahrenheit temperature units.

Image: Dual pressure and temperature measurement display.

5.4 Superheat and Subcooling Calculation

The gauge automatically calculates superheat and subcooling based on the selected refrigerant and measured values.

• After selecting the refrigerant, the display will show the calculated superheat (SH) and subcooling (SC) values.

Image: Display showing refrigerant data, superheat, and subcooling.

5.5 Test de fuite de pression

To perform a pressure leak test:

1. Connect the gauge to the system and pressurize it.
2. Press the Function Button (3) to enter the leak test mode.
3. The gauge will record the initial pressure and continuously monitor for changes.
4. The display will show the leak time (HH:MM) and the pressure difference (ΔP) between the initial and instantaneous pressure values.

Image: Pressure leak test display.

5.6 Mesure du vide

The device can measure the percentage of vacuum.

• Connect the gauge to the system and initiate the vacuum process.
• The display will show the vacuum percentage.

Image: Technician performing HVAC system service with the gauge.

6. Entretien

6.1 Nettoyage

• Wipe the gauge unit with a soft, damp chiffon. N'utilisez pas de nettoyants abrasifs ou de solvants.
• Ensure the temperature clamps and hoses are clean and free of debris after each use.

6.2 Stockage

• Store the manifold gauge set in its portable toolbox to protect it from dust and physical damage.
• Conservez l'appareil dans un endroit sec, à l'abri de la lumière directe du soleil et des températures extrêmes.

7. Dépannage

7.1 Relevés de température inexacts

• Problème: Temperature readings appear incorrect or unstable.
• Solution: Ensure the temperature sensor clips are properly connected to the probe sockets and securely attached to the refrigerant pipes. A poor connection can lead to inaccurate values.

7.2 No Display or Device Not Powering On

• Problème: The LCD display is blank or the device does not turn on.
• Solution: Check the battery compartment for proper battery installation and charge level. Replace batteries if necessary.

7.3 Pressure Readings are Unstable or Incorrect

• Problème: Pressure readings fluctuate excessively or seem inaccurate.
• Solution: Verify all hose connections are tight and free of leaks. Ensure the correct refrigerant type is selected in the device settings.

8. Spécifications

9. Garantie et assistance

CMTOOL products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official CMTOOL webVeuillez conserver votre preuve d'achat pour toute réclamation au titre de la garantie.