Daikin FBQ20EAVAK, Installation Manual

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English 14
6-5 REFRIGERANT PIPE SIZE AND ALLOWABLE PIPE LENGTH
Piping bend radius
〈
CAUTION
〉
The maximum allowable pipe length differs depending on the model. Please refer to the table below.
(1) Refrigerant pipe size
(mm)
(2)
Allowable pipe length
• Equivalent length is the pressure loss due to L joints, traps, and so on along the refrigerant piping converted
to a straight piping length of the same size and added to the overall value.
CAUTION
• Do not use pipe cutters and flare tools which have been used with refrigerant other than R410A.
•
When connecting the flares, coat the flare section with ether oil or ester oil.
• Only use the flare nuts included with the unit. Using different flare nuts (one type) may cause the refrigerant
to leak.
• In order to prevent dirt, liquid or dust from entering the piping, cure the piping with a pinch or taping.
6-6 REFRIGERANT PIPING WORK
•
The local interunit piping is connectable in four directions.
(Refer to Fig. 7)
• Do not let anything other than the designated refrigerant (such as air or water) enter the refrigerant system.
•
When connecting in a downward direction, make four round holes using a 6-mm diameter drill in the central
section around the knock hole and open the knock hole.
(Refer to Fig. 8)
•
Cutting out the two slits makes it possible to install as shown in Fig. 9. (Use a metal saw to cut out the slits.)
Piping diameter Piping thickness Bend radius
φ
9.5mm 0.8mm 30mm or more
φ
15.9mm 1.0mm 50mm or more
e p i p s a G e p i p d i u q i L y ti c a p a c t i n u r o o d t u O
20 · 24 · 36 · 45 · 48 type
φ
9.5 × t0.8
φ
15.9 × t1.0
Outdoor unit capacity
Maximum allowable pipe length
(It is equivalent length in the inside)
Maximum allowable
height difference
20 · 24 type 50m (70m) 30m
36 · 45 · 48 type 70m (90m) 30m
Front panel
Pipe outlet panel
Screw for front panel
Pipe outlet panel screw
Forward
Backward
Sideways
Downward
Connecting pipe
Bottom frame
Dril
Center area around
knock hole
Knock hole
Slit
Slit
Fig. 9 Fig. 8 Fig. 7
01_EN_3P281953-1B.fm Page 14 Tu esday, January 25, 2011 3:35 PM