Toshiba HWS-805H-E Installation Manual page 16

Air to Water Heat Pump
 Optional installation parts
(Locally procured)
Refrigerant piping
A Liquid side: Ø9.5 mm
Gas side: Ø15.9 mm
Pipe insulating material
B
(polyethylene foam, 10 mm thick)
C Putty, PVC tape
 Refrigerant piping connection
CAUTION
TAKE NOTE OF THESE 4 IMPORTANT POINTS
BELOW FOR PIPING WORK
1. Keep dust and moisture away from inside the
connecting pipes.
2. Tightly connect the connection between pipes
and the unit.
3. Evacuate the air in the connecting pipes using a
VACUUM PUMP.
4. Check for gas leaks at connection points.
Piping connection
Outer diameter
Ø9.5 mm
Outer diameter
Ø15.9 mm
Flaring
1. Cut the pipe with a pipe cutter.
Be sure to remove burrs that may cause a gas leak.
2. Insert a flare nut into the pipe, and then flare the
pipe. Use the flare nuts supplied with the air to water
heat pump or those for R410A.
Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of
refrigerant R22, the flare tools newly manufactured
for R410A are recommended.
However, the conventional tools can be used by
adjusting the projection margin of the copper pipe.
15-EN
Parts name
Liquid side
Thickness
0.8 mm
Gas side
Thickness
1.0 mm
Projection margin in flaring: B (Unit: mm)
Qty
Rigid (Clutch type)
One each
Outer diam. of
1
copper pipe
One each
9.5
15.9
Flaring diameter size: A (Unit: mm)
Outer diam. of copper pipe
* In case of flaring for R410A with the conventional
flare tool, pull the tool out approx. 0.5 mm more than
that for R22 to adjust it to the specified flare size.
The copper pipe gauge is useful for adjusting the
projection margin size.
Piping necessary to change the flare nut /
machining size due to pipe compression
▼ Flare nut width: H and flare matching size: A.
Flare nut width: H
H
Flare machining size: A
A
Do not apply refrigerator oil to the flare surface.
– 15 –
Installation Manual
B
R410A tool used
R410A
0 to 0.5
A
9.5
15.9
Copper pipe
Ø6.4 Ø9.5 Ø12.7
outer dia.
For R410A 17 22
For R22 Same as above
Copper pipe
Ø6.4 Ø9.5 Ø12.7
outer dia.
For R410A 9.1 13.2
For R22 9.0 13.0
Becomes a little larger for R410A
Conventional tool
used
1.0 to 1.5
+0
A
–0.4
13.2
19.7
(mm)
Ø15.9 Ø19.0
26 29 36
Same
24 27 as
above
(mm)
Ø15.9 Ø19.0
16.6 19.7 24.0
16.2 19.4 23.3