New Tools Required For Hfcs And Reasons Of Change - Daikin VRV Plus Series General Information Manual

Si33-003.book Page 177 Monday, June 25, 2001 9:06 AM
SiE33-003
5.2

New Tools Required for HFCs and Reasons of Change

Flaring tool
Pipe assembling oil
Torque wrench
Gauge manifold
Charge hose
Charging cylinder
Vacuum pump
Gas detector
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.
Tool name
1. Flaring tool
Note: Coventional flaring tools can be used for R-407C.
New Refrigerant R-407C
Tool
(Previous tool can be used.)
Due to chiller oil change
(Requires ether oil, ester oil, alkylbenzene oil and their mixtures)
(Previous tool can be used.)
For increased pressure and to prevent mixing of impurities.
(Different gauge scale, higher pressure resistance)
Previous tool cannot be used due to different refrigerant characteristics.
(Measuring instrument must be used.)
Existing vacuum pump can be used if reverse flow preventive adaptor is
installed.Vacuum pumps with reverse flow preventive mechanism are also
available.
HFC gas detector must be used.
Difference from previous tool
Larger dimension A
Class-1 pipes:R-407C
: http://splitoff.ru/tehn-doc.html
Service Tools
Reason for new tool
R-407C
New tool specifications
Dimension A
Nominal size Class-1 +0 Previous
–0.4
1/4 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
Unit:mm
8.0~9.0
177