Table of Contents
Advertisement
Available languages
Available languages
A Main-HBC controller
B Twinning pipe (field supply)
C Slope of the twinning pipe is at an angle within ±15° to the ground
Notes:
•
After pipe connection, be sure to check that there is no gas leakage, using
a leak detector or soap-and-water solution.
•
Before brazing the refrigerant piping, always wrap the piping on the main
body, and the thermal insulation piping, with damp cloths to prevent heat
shrinkage and burning the thermal insulation tubing. Take care to ensure
that the flame does not come into contact with the main body itself.
•
Do not use leak-detection additives.
•
Straight run of pipe connecting twinning pipe is 500 mm or more.
Warning:
Do not mix anything other than the specified refrigerant (R410A) into the refrig-
erating cycle when installing or moving. Mixing air may cause the refrigerating
cycle to reach abnormally high temperature, resulting in burst pipes.
Caution:
Cut the tip of the outdoor unit piping, remove the gas, and then remove the
brazed cap.
[Fig. 4.2.2] (P.3)
A Cut here
B Remove brazed cap
4.3. Insulating pipes
Be sure to add insulation work to piping by covering high-temperature pipe and low-
temperature pipe separately with enough thickness heat-resistant polyethylene
foam, so that no gap is observed in the joint between the HBC controller and insulat-
ing material, and insulating materials themselves. When insulation work is insuffi-
cient, there is a possibility of condensation. Pay special attention to insulation work in
the ceiling plenum.
[Fig. 4.3.1] (P.4)
A Locally procured insulating material for pipes
B Bind here using band or tape.
C Do not leave any opening.
D Lap margin: more than 40 mm
E Insulating material (field supply)
F Unit side insulating material
•
Insulation materials for the pipes to be added on site must meet the following
specifications:
Outdoor unit
High-pressure pipe
10 mm or more
-HBC controller Low-pressure pipe
20 mm or more
Temperature Resistance
100°C min.
•
Installation of pipes in a high-temperature high-humidity environment, such as
the top floor of a building, may require the use of insulation materials thicker than
the ones specified in the chart above.
•
When certain specifications presented by the client must be met, ensure that
they also meet the specifications on the chart above.
•
The brazed connections must be covered with insulation, with its seam facing
upward and fastened with the bands.
4.4. Drain piping work
1. Drain piping work
•
Ensure that the drain piping is downward (sloped gradient of more than 1/100) to
the outdoor (discharge) side. If it is impossible to take any downward pitch, use
an optionally available drain-up mechanism to obtain a downward pitch of more
than 1/100.
•
Ensure that any cross-wise drain piping is less than 20 m. If the drain piping is
long, support it with metal brackets to prevent it from bending, warping, or vibrat-
ing.
•
Connect the supplied drain hose to the discharge port on the unit body. Use hard
vinyl chloride pipes VP-25 (ø32) for drain piping (2). Tighten the supplied drain
hose onto the discharge port using the supplied hose band. (For this, do not use
any adhesive because the drain hose will need to be removed for servicing at a
later date.)
•
Do not use any odor trap around the discharge port.
[Fig. 4.4.1] (P.4)
A: 25 cm
B: 1.5 – 2 m
A Downward gradient of more than 1/100
B Insulating material
C Supporting bracket
D Drain discharge port
E Drain hose (200 mm long, accessory)
F Cable tie (accessory)
G Hose band (accessory)
•
As shown in 3, install a collecting pipe about 10 cm below the drain ports and give
it a downward pitch of more than 1/100. This collecting pipe should be of VP-30.
•
Set the end of drain piping in a place without any risk of odor generation.
•
Do not put the end of drain piping into any drain where ionic gases are generated.
•
Drain piping may be installed in any direction. However, please be sure to
observe the above instructions.
10
[Fig. 4.4.2] (P.4)
A Main-HBC controller/Sub-HBC controller
B Indoor unit
C Collecting pipe
D Please ensure this length is at least 100 mm.
2. Discharge test
After completing drain piping work, open the HBC controller panel, and test drain dis-
charge using a small amount of water. Also, check to see that there is no water leak-
age from the connections.
3. Insulating drain pipes
Provide sufficient insulation to the drain pipes just as for refrigerant pipes.
Caution:
Be sure to provide drain piping with heat insulation in order to prevent excess
condensation. Without drain piping, water may leak from the unit causing
damage to your property.
Advertisement
Chapters
Table of Contents
