Allowable Length And Allowable Height Difference Of Refrigerant Piping - Toshiba Carrier TCB-IFDMR01UP-UL Service Manual

4-4. Allowable length and allowable height difference of refrigerant piping

1) When connecting the Dx-coil interface
Main pipe equivalent length
Total piping length
Furthest equivalent pipe length L (real length)
Furthest equivalent pipe length from the 1st branch
Furthest equivalent pipe length between outdoor unit
Max. real length of pipes connecled to indoor units
Maximum equivalent between branching section
Outdoor unti - Indoor unit (Upper outdoor unit) H1
Outdoor unti - Indoor unit
Max Height
(Lower outdoor unit) H2
Difference
Indoor unit - Indoor unit (Upper outdoor unit) H2
Indoor unit - Indoor unit (Lower outdoor unit) H2
Amount of additional Refrigerant
Item
H2 > 9'10" (3 m)
H2 ≤ 9'10" (3 m)
TA type
ft
Same as piping length restriction of outdoor unit
656'2" 200
426'6"(393'8") 130(120)
131'3" 40
Same as piping length
restriction of outdoor unit
65'7" 20
98'5" 30
131'3" (40 m) or the outdoor unit
spec. Whichever is shorter of
outdoor unit.
Refer to specification of outdoor unit
- 21 -
TF, DDC type
m ft
393'8"(328'1")
328'1"
-
-
-
-
131'3"
-
-
m
120(100)
100
40