Toshiba RAS-B10EKVP-E, RAS-M13EKCVP-E, RAS-M18EACV-E, RAS-M14EACV-E Installation/Service Tools, 62

Installation/Service Tools

Changes in the product and components

In air conditioners using R410A, in order to prevent any other refrigerant from being accidentally charged, the service port diameter size of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch)

•In order to increase the pressure resisting strength of the refrigerant piping, flare processing diameter and opposing flare nuts sizes have been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

New tools for R410A

New tools for R410A	Applicable to R22 model	Changes
Gauge manifold		As the working pressure is high, it is impossible to measure
		the working pressure using conventional gauges. In order to
		prevent any other refrigerant from being charged, the port
		diameters have been changed.
Charge hose		In order to increase pressure resisting strength, hose
		materials and port sizes have been changed (to 1/2 UNF 20
		threads per inch).
		When purchasing a charge hose, be sure to confirm the
		port size.
Electronic balance for refrigerant		As working pressure is high and gasification speed is fast, it
charging		is difficult to read the indicated value by means of charging
		cylinder, as air bubbles occur.
Torque wrench		The size of opposing flare nuts have been increased.
(nominal dia. 1/2, 5/8)		Incidentally, a common wrench is used for nominal
		diameters 1/4 and 3/8.
Flare tool (clutch type)		By increasing the clamp bar’s receiving hole size, strength
		of spring in the tool has been improved.
Gauge for projection adjustment	—	Used when flare is made by using conventional flare tool.
Vacuum pump adapter		Connected to conventional vacuum pump. It is necessary to
		use an adapter to prevent vacuum pump oil from flowing
		back into the charge hose. The charge hose connecting
		part has two ports — one fo r conventional refrigerant (7/16
		UNF 20 threads per inch) and one for R410A. If the vacuum
		pump oil (mineral) mixes with R410A a sludge may occur
		and damage the equipment.
Gas leakage detector		Exclusive for HFC refrigerant.

•Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the U.S’s ARI specified rose color (ARI color code: PMS 507).

•Also, the “charge port and packing for refrigerant cylinder” requires 1/2 UNF 20 threads per inch corresponding to the chargehose’s port size.

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