Carrier X-POWER Series Service Manual page 81

Carrier service manual
Note：
1. The equivalent length of the each branch joint is 1.64ft(0.5m). All branches must be purchased from
Carrier, otherwise system is induced to malfunction
2. The indoor units should as equal as possible to be installed in the both sides of the U-shape branch
joint.
3. When the outdoor unit is on the top position and the difference
of level is over 65.6ft(20m), it is recommended that set an oil
return bend every 10m in the gas pipe of the main pipe, the
specification of the oil return bend refers to the figure on the right.
4. When the outdoor unit is on the low position, H≥131.2ft(40m),
the liquid pipe of the main pipe need to increase one size.
5. The allowable length from the first branch joint to the farthest indoor unit should be equal to or shorter
than 131.2ft(40m). But the allowable length can extended to 295ft(90m), if the selection principle can
meets all the following conditions.
Condition
1. It is needed to increase all the pipe diameters of the main
distribution pipe which between the first and the last branch joint
assembly. (Please change the pipe diameter at field) If the pipe
diameter of the main slave pipe is the same as the main pipe, then
it is not needed to be increased.
2. When counting the total extended length, the actual length of
above distribution pipes must be doubled. (Expect the main pipe
and the distribution pipes which no need to be increased.)
L1+(L2+L3+L4+L5+L6+L7+L8+L9)×2+a+b+c+d+e+f+g+h+i+j≤328
0ft(1000m)
3. The length from the indoor unit to the nearest branch joint
assembly≤131ft(40m)
a,b,c,...j≤131ft(40m)(Pipe diameter requirements, please refers to
table.4-3)
4. The distance difference between [the outdoor unit to the farthest
indoor unit] and [the outdoor unit to the nearest indoor unit] is
≤131ft(40m).
The farthest indoor unit "N10"
The nearest indoor unit "N1"
(L1+L5+L8+L9+j)-(L1+L2+L3+a)≤131ft(40m)
Installation
R410a DC Inverter 60Hz
≥11-13/16in.(300mm)
Example
"N10": L5+L8+L9+j≤295ft(90m)
L2,L3,L4,L5,L6,L7,L8,L9
Need to increase the pipe diameter
of the distribution pipe
Increasing size as the following:
Φ3/8(Φ9.53)→Φ1/2(Φ12.7)
Φ1/2(Φ12.7)→Φ5/8(Φ15.9)
Φ5/8(Φ15.9)→Φ3/4(Φ19.1)
Φ3/4(Φ19.1)→Φ7/8(Φ22.2)
Φ7/8(Φ22.2)→Φ1(Φ25.4)
Φ1(Φ25.4)→Φ1-1/8(Φ28.6)
Φ1-1/8(Φ28.6)→Φ1-1/4(Φ31.8)
Φ1-1/4(Φ31.8)→Φ1-1/2(Φ38.1)
Φ1-1/2(Φ38.1)→Φ1-5/8(Φ41.3)
Φ1-5/8(Φ41.3)→Φ1-3/4(Φ44.5)
Φ1-3/4(Φ44.5)→Φ2-1/8(Φ54.0)
Refer to Figure.4-1
Refer to Figure.4-1
Refer to Figure.4-1
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