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20 31-5000572 Rev. 1
ENGLISH
INSTALLATION INSTRUCTIONS
Allowing Piping Length and Drop Between Indoor and Outdoor (cont.)
Pipe Length and Drop Allowable Value ft(m) For Example Remarks
Total Pipe Length less than or equal 3280 (1000) L1+L2+L3+L4+…+L24
Outdoor to the farthest
indoor length
Actual Length less than or equal 722 (220)
L1+L2+L3+L6+L8
Equivalent Length less than or equal 853 (260)
The outdoor unit to the first branch pipe length
(main piping)
less than or equal 427 (130) L1
The first branch pipe to the farthest indoor unit
pipe length
less than or equal 295 (90) L2+L3+L6+L8
The distance between the nearest indoor unit
and the farthest indoor
less than or equal 131 (40) L2+L3+L6+L8-L2-L5-L10
Height difference
between indoor and
outdoor
Outdoor unit above H less than or equal 131(40)
H
Outdoor unit below H less than or equal 164(50)
Indoor machine maximum drop h less than or equal 98 (30) h
The indoor unit and the nearest branch length h less than or equal 32.8(10) L4\L8\L9\L10\L11\L12\L14\L17\
L19\L20\L21\L23\L24
NOTE: Equivalent length of pipe is divided equivalent pipe length of 1.6ft (0.5m). THe indoor unit liquid and suction piping
should be equal length as possible to the branch fittings.
Branch Pipe
Branch Pipe Selection
Total Indoor Capacity kbtu/h(100W) Model (optional)
less than 114 (335) FQG-B335A
more than114 (335), less than173 (506) FQG-B506A
more than173 (506), less than 249 (730) FQG-B730A
more than 249 (730) FQG-B1350A
Outdoor Unit Type
The main unit will choose the closest one to the 1st branch pipe.
NOTES:
1. Please double check the pipe sizes at the gather fitting when installing multiple OD units.
2. Please adjust the piping sizes connecting the outdoor units according to the installation instructions or the selection
software.
3. Install the gather pipes either vertically or horizontally and not at angles.
4. Always purge copper lines with dry nitrogen when blazing to prevent copper oxidation and damage to system
components.
Adhesive Side
Seal the connection and wrap the heat
insulator with adhesive tape
Horizontal
Floor
Floor
Right
Wrong
Cut off at the middle
Cut off pipe with the cutter
Prepare on field
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