Installation/Servicing Tools - Toshiba RAS-M10UKV-E3 Service Manual

9-1-1. Installation/Servicing Tools

In the case of an air condition using R-410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter
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 size of opposite side of flare nuts
has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)
New tools for R-410A
New tools for R-410A
Gauge manifold
Charge hose
Electronic balance for
refrigerant charging
Torque wrench
(nominal diam. 1/2, 5/8)
Flare tool
(clutch type)
Gauge for projection adjustment
Vacuum pump adapter
Gas leakage detector
• Incidentally, the "refrigerant cylinder" comes with the refrigerant designation (R-410A) 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" require 1/2 UNF 20 threads per inch corresponding to the charge hose's port size.
Changes in the product and components
Applicable to R-22 model
As pressure is high, it is impossible to measure by means of conventional gauge.
In order to prevent any other refrigerant from being charged, each port diameter
has been changed.
In order to increase pressure resisting strength, hose materials and port size
have been changed (to 1/2 UNF 20 threads per inch).
When purchasing a charge hose, be sure to confirm the port size.
As pressure is high and gasification speed is fast, it is difficult to read the
indicated value by means of charging cylinder, as air bubbles occur.
The size of opposite sides of flare nuts have been increased. Incidentally,
a common wrench is used for nominal diameters 1/4 and 3/8.
By increasing the clamp bar's receiving hole, strength of spring in the tool has
been improved.
Used when flare is made by using conventional flare tool.
Connected to conventional vacuum pump. It is necessary to use an adapter to
prevent vacuum pump oil from flowing back to the charge hose.
The charge hose connecting part has two ports-one for conventional refrigerant
(7/16 UNF 20 threads per inch) and one for R410A. If the vacuum pump oil
(mineral) mixes with R-410A a sludge may occur and damage the equipment.
Exclusive for HFC refrigerant.
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Changes