– 13 –
3-3.Tools
3-3-1. Required Tools
The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is
changed to prevent mixing of other refrigerant.
To reinforce the pressure-resisting strength, fl are processing dimensions and opposite side dimension of fl are
nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.
The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,
clogging of capillary, etc. Accordingly, the tools to be used are classifi ed into the following three types.
1. Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
2. Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
3. Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.
Tools whose specifi cations are changed for R410A and their interchangeability
No. Used tool Usage
R410A air-water heat pump installation
Conventional air-water
heat pump installation
Existence of
new equipment
for R410A
Whether conventional
equipment can be used
Whether new equipment
can be used with
conventional refrigerant
1 Flare tool Pipe fl aring Yes *(Note 1)
2
Copper pipe gauge for
adjusting projection margin
Flaring by conventional
fl are tool
Yes *(Note 1) *(Note 1)
3 Torque wrench (For Ø12.7) Connection of fl are nut Yes
4 Gauge manifold
Evacuating, refrigerant
charge, run check, etc.
Yes
5 Charge hose
6 Vacuum pump adapter Vacuum evacuating Yes
7
Electronic balance for
refrigerant charging
Refrigerant charge Yes
8 Refrigerant cylinder Refrigerant charge Yes
9 Leakage detector Gas leakage check Yes
10 Charging cylinder Refrigerant charge (Note 2)
(Note 1) When fl aring is carried out for R410A using the conventional fl are tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
(Note 2) Charging cylinder for R410A is being currently developed.
Tools exclusive for R410A (The following tools for R410A are required.)
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary as
the general tools.
1. Vacuum pump 8. Spanner or Monkey wrench
Use vacuum pump by attaching vacuum pump adapter. 9. Hole core drill (Ø65)
2. Torque wrench (For Ø6.35, Ø9.52) 10. Hexagon wrench (Opposite side 4mm)
3. Pipe cutter 4. Reamer 11. Tape measure
5. Pipe bender 6. Level vial 12. Metal saw
7. Screwdriver (+, –)
Also prepare the following equipments for other installation method and run check.
1. Clamp meter 3. Insulation resistance tester
2. Thermometer 4. Electroscope
General tools (Conventional tools can be used.)
To Next Page
Loading...