Hisense AVWT-72FHFSHA Instrucciones De Montaje página 25

5.4.2 Piping Connection
Make sure that the stop valves are closed completely.
(1)
Protect the compressor and sound-proof cover with metal plate when brazing the gas pipe as shown in Fig. 5.2. Pay
(2)
attention to the flame from the burner not to burn the stop valve body.
Connect the indoor unit and the outdoor unit with refrigerant piping. Prevent the refrigerant piping from touching
(3)
weak parts of the building such as wall, ceiling, etc. Abnormal sound may give off due to vibration of the piping.
As for the flaring work of the field pipe, use the specified tightening torque in Table 5.3. Purge nitrogen gas into the
(4)
pipe when brazing.
Insulate the gas pipe and liquid pipe completely.
(5)
Mount the piping cover equipped with the outdoor unit after the piping connection. If not, the unit may be damaged
(6)
due to the ingress of snow or rain water.
NOTES:
1. Ensure that the closing pipe of the gas stop valve(1 place) is removed firstly.
2. Refer to the item 5.2 for flaring work.
Construction Example
< Heat Pump System >
(High/Low pressure Gas)
High/Low pressure Gas Piping
(Field-Supplied)
Liquid Piping
(Field-Supplied)
Liquid Piping
Manifold Pipe 2(Liquid)
(Field-Supplied)
High/Low pressure
Gas Piping(Field-Supplied)
< Front Side Piping Connection >
Manifold Pipe 1
(High/Low pressure Gas)
High/Low pressure Gas Piping
(Field-Supplied)
Liquid Piping
(Field-Supplied)
Manifold Pipe 1
(Liquid)
Table 5.3 Flare Nut Tightening Work
Required Tightening Torque
Pipe Size
Φ6.35 (1/4)
Φ9.53 (3/8)
Φ12.7 (1/2)
Φ15.88 (5/8)
Φ19.05 (3/4)
Outdoor unit A
Outdoor unit B
Manifold Pipe 1
Manifold Pipe 2
(High/Low pressure Gas)
Bending Pipe
(Field-Supplied)
Bending Pipe
(Field-Supplied)
Liquid Piping
Manifold Pipe 2(Liquid)
(Field-Supplied)
Outdoor unit A
Accessory Piping
(Field-Supplied)
Bending Pipe
(Field-Supplied)
Manifold Pipe 2
(High/Low Pressure Gas)
High/Low pressure
Manifold Pipe 2(Liquid)
Gas Piping(Field-Supplied)
< Downward Piping Connection >
Tightening Torque (ft·lbs(N·m))
10~13(14~18)
25~31(34~42)
50~62(68~84)
63~77(85~104)
90~110(122~149)
Outdoor unit C
High/Low pressure
Gas Piping(Field-Supplied)
Outdoor unit B
Outdoor unit C
Accessory Piping
(Field-Supplied)
Liquid Piping
(Field-Supplied)
17
<View-P>
Min.19-11/16in.
(500mm)
NOTE:
This piping connection is NOT
used in heat pump system
(2-pipe)
Liquid Piping
High/Low Pressure
Gas Piping
There are three piping connections in the outdoor
units
In case of heat pump system, there are only two
piping connections.