Refrigerant piping | Pioneer MUH-GA25VB, MUH-GA35VB, MUH-GA20VB

Conversion chart of refrigerant temperature and pressure

(MPa [Gauge])
	4.0
	3.5
pressure			R410A


	3.0		R22
	3.0		R22
liquid	2.5


	2.0
	2.0
	1.5
Saturated	1.5
Saturated	1.0
	1.0
	0.5
	0.5
	0.0
	0.0
	-0.5
	-30 -20	-10 0 10 20 30 40 50 60

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f [Gauge])

(:)

1.Tools dedicated for the air conditioner with R410A refrigerant

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.

The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.

R410A tools	Can R22 tools be used?	Description
		R410A has high pressures beyond the measurement range of existing
Gauge manifold	No	gauges. Port diameters have been changed to prevent any other refrigerant
		from being charged into the unit.

Charge hose	No	Hose material and cap size have been changed to improve the pressure
Charge hose	No	resistance.
		resistance.
Gas leak detector	No	Dedicated for HFC refrigerant.

Torque wrench	Yes	6.35 mm and 9.52 mm

Flare tool	Yes	Clamp bar hole has been enlarged to reinforce the spring strength in the tool.

Flare gauge	New	Provided for flaring work (to be used with R22 flare tool).

Vacuum pump	New	Provided to prevent the back flow of oil. This adapter enables you to use
adapter	New	vacuum pumps.
adapter		vacuum pumps.
Electronic scale for	New	It is difficult to measure R410A with a charging cylinder because the
refrigerant charging	New	refrigerant bubbles due to high pressure and high-speed vaporization
refrigerant charging

No : Not Substitutable for R410A Yes : Substitutable for R410A

2.Refrigerant piping

1Specifications

Use the refrigerant pipes that meet the following specifications.

Pipe	Outside diameter	Wall	Insulation material
		Wall
	mm	thickness
	mm	thickness

For liquid	6.35	0.8 mm	Heat resisting foam plastic
For gas	9.52	0.8 mm	Specific gravity 0.045 Thickness 8 mm

•Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less than 0.8mm, as the pressure resistance is insufficient.

MUH-GA20VB, MUH-GA25VB, MUH-GA35VB specifications

The Pioneer MUH-GA25VB, MUH-GA35VB, and MUH-GA20VB are a trio of advanced multimedia head units designed to enhance the in-car experience with a blend of cutting-edge technology and user-friendly features. Each model offers a unique set of functionalities tailored to meet varying needs and preferences, while maintaining high standards in audio performance and connectivity.

The MUH-GA25VB serves as a versatile entry point into Pioneer’s lineup. It features a sleek 6.2-inch touchscreen display that provides intuitive controls and easy access to music and navigation. With Bluetooth connectivity, users can enjoy hands-free calling and wireless audio streaming, enhancing safety and convenience on the road. The built-in FM/AM tuner and compatibility with USB and AUX sources allow for diverse listening options. Moreover, the MUH-GA25VB supports various audio formats, ensuring playback flexibility.

Stepping up, the MUH-GA35VB incorporates enhanced sound tuning features, including a 13-band graphic equalizer that allows users to tailor audio output to their liking. The larger 7-inch touchscreen provides an immersive interface, making navigation through multimedia content seamless. This model also supports Apple CarPlay and Android Auto, enabling users to integrate their smartphones for a more connected experience. The voice control feature allows for hands-free operation of navigation and music, making it an ideal choice for tech-savvy drivers.

At the top of the range, the MUH-GA20VB boasts superior connectivity and sound quality. It is equipped with a high-resolution audio playback capability, supporting formats up to 192 kHz/24-bit for audiophiles seeking the best sound fidelity. With dual USB ports, users can connect multiple devices simultaneously, allowing for easier management of music and charging. The hardware enhancements include high-performance DACs that result in clearer and more detailed audio reproduction. Furthermore, this model features a customizable interface, enabling users to tailor the look of the head unit to match their vehicle’s interior.

Collectively, the Pioneer MUH series – MUH-GA25VB, MUH-GA35VB, and MUH-GA20VB – presents a compelling case for anyone looking to upgrade their vehicle’s audio and multimedia capabilities. They combine sophisticated technology with user-centric designs, ensuring a remarkable in-car experience that caters to a diverse range of audiophiles and tech enthusiasts alike. Whether you prioritize straightforward functionality or advanced features, there is a model in this lineup to suit every taste and requirement.

R410A tools

Can R22 tools be used?

Description

2.Refrigerant piping

MUH-GA20VB, MUH-GA25VB, MUH-GA35VB specifications