8-3. Tools specifically for R407C
●
For servicing, use the following tools for R407C
●
The above tools specifically for R407C must not be used for R22. Doing so will
cause malfunction of the unit.
●
For the above vacuum pump (
✽
1,
✽
2) and vacuum pump adapter (
✽
3) , those for
R22-type units can be used for R407C-type. However, they must be used
exclusively for R407C and never alternately with R22.
8-4. For tubing installation procedures
●
When the tubes are connected,
always apply HAB oil on the flare portions to improve the sealing of
tubing.
The following is the HAB oil generally used:
Esso: ZERICE S32
For details on tubing installation procedures, refer to the installation manuals attached to the indoor
unit and outdoor unit.
54
Tool Distinction
Tool Name
• Gauge manifold
• Charging hose
• Gas leak detector
• Refrigerant cylinder
• Charging cylinder
Tools specifically for R407C
• Refrigerant recovery unit
• Vacuum pump with anti-reverse flow (
✽
1)
(Solenoid valve-installed type, which prevents oil from flowing back into the unit
when the power is off, is recommended.)
• Vacuum pump (
✽
2) ..... can be used if the following adapter is attached.
• Vacuum pump adapter (reverse-flow prevention adapter) (
✽
3).
(Solenoid valve-installed adapter attached to a conventional vacuum pump.)
• Electronic scale for charging refrigerant
• Flare tool
• Bender
Tools which can be commonly • Torque wrench
used for R22 and R407C
• Cutter, Reamer
• Welding machine, nitrogen gas cylinder
CAUTION
NOTE
