SiE33-003
Service Tools
New Refrigerant R-407C
177
5.2
New Tools Required for HFCs and Reasons of Change
The tools shown in the following section are examples of tools available on the market.
Several companies offer tools for use with HFCs. Contact air conditioner hardware shops for details of
tools available in your market.
Note:
Coventional flaring tools can be used for R-407C.
Tool
Reason for new tool
R-407C
Flaring tool
(Previous tool can be used.)
Pipe assembling oil
Due to chiller oil change
(Requires ether oil, ester oil, alkylbenzene oil and their mixtures)
Torque wrench
(Previous tool can be used.)
Gauge manifold
Charge hose
For increased pressure and to prevent mixing of impurities.
(Different gauge scale, higher pressure resistance)
Charging cylinder
Previous tool cannot be used due to different refrigerant characteristics.
(Measuring instrument must be used.)
Vacuum pump
Existing vacuum pump can be used if reverse flow preventive adaptor is
installed.Vacuum pumps with reverse flow preventive mechanism are also
available.
Gas detector
HFC gas detector must be used.
Tool name
Difference from previous tool
New tool specifications
1. Flaring tool
Larger dimension A
Class-1 pipes:R-407C
Dimension A
Unit:mm
Nominal size
Class-1 +0
–0.4
Previous
1/4
9.0
8.0~9.0
3/8
13.0
12.6~13.0
1/2
16.2
15.8~16.2
5/8
19.4
19.0~19.9
3/4
23.3
22.9~23.3
Si33-003.book Page 177 Monday, June 25, 2001 9:06 AM
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