Selection Of Refrigerant Piping - Toshiba MMU-AP0072H2UL Engineering Data Book

3
Refrigerant piping design

3-3. Selection of refrigerant piping

3-3-1. Heat recovery
Outdoor units
Header unit Follower unit
(A) (B)
(2)
(1)
(1)
(3)
(9)
(9)
(4) Main pipe
Suction gas pipe
Dischage gas pipe
Liquid pipe
(1) Outdoor unit connecting pipe
Outdoor unit capacity type
072 type
096 type
120 type
(2) Balance pipe
Capacity code of outdoor unit (*1)
144 to 336 type
(3) Connecting pipe between outdoor units
Total capacity of outdoor
units at downstream side (*1 *7)
228 or more
(4) Outdoor unit connection piping kit
Total capacity of outdoor units
at downstream side (*1 *7)
Below 247
247 or more
(5) Main pipe
Capacity code of outdoor unit
072, 096
120
144
168, 192
216, 240
288, 312, 336
(6) Branching pipe
Total cpacity code of indoor units
at downstream side (*1 *2 *3 *8)
Below 61
61 to below 115.5
115.5 to below 153.5
153.5 to below 191.5
191.5 to below 239
239 to below 334
334 or more
*1: The capacity code of outdoor unit and indoor unit, please refer to 2-2.
*2: If the size of the pipe to be selected is larger than the size of the main pipe, please use the same pipe size as the main pipe.
*3: Two pipes in downstream of FS unit and cooling only indoor unit use liquid pipe and suction gas pipe.
*4: The first branching joint, select at capacity code of outdoor unit.
*5: If the total capacity code of indoor units exceed the capacity code of outdoor unit, select the size from the capacity code of the outdoor unit.
*6: For one line pipe line of header branching, total 57 capacity code of indoor units is connectable.
If connecting the branching header to the first branch section with the capacity code of outdoor unit is more than 114 (kBtu/h) and less than 247 (kBtu/h), use the
RBM-2043FUL (4 branch), and RBM-HT2083FUL (8 branch). Also, the branching header can not be used for the first branch section when the capacity code of outdoor
unit is more than 247 (kBtu/h).
*7: The main pipe is the starting point. The follower unit side is the downstream side.
*8: Selection piping is the starting point. The indoor unit side is the downstream side.
*9: Use indoor units with group control if connecting indoor units of two or more to one FS unit.
(5)
Follower unit
(C)
(2)
(1)
(5)
(8)
(8)
First branch section
Suction Discharge
Liquid side
gas side gas side
Ø7/8" Ø3/4" Ø1/2"
Ø7/8" Ø3/4" Ø1/2"
Ø1-1/8" Ø3/4" Ø1/2"
Balance pipe
Ø3/8"
Suction gas Discharge
Liquid side
side gas side
Ø1-3/8" Ø1-1/8" Ø3/4"
Model name
RBM-BT14FUL
RBM-BT24FUL
Suction Discharge
Liquid side
gas side gas side
Ø7/8" Ø3/4" Ø1/2"
Ø1-1/8" Ø3/4" Ø1/2"
Ø1-1/8" Ø7/8" Ø5/8"
Ø1-1/8" Ø7/8" Ø3/4"
Ø1-3/8" Ø1-1/8" Ø3/4"
Ø1-3/8" Ø1-1/8" Ø7/8"
Suction Discharge
Liquid side
gas side gas side
Ø5/8" Ø1/2" Ø3/8"
Ø7/8" Ø3/4" Ø1/2"
Ø1-1/8" Ø7/8" Ø5/8"
Ø1-1/8" Ø7/8" Ø3/4"
Ø1-3/8" Ø1-1/8" Ø3/4"
Ø1-3/8" Ø1-1/8" Ø7/8"
Ø1-5/8" Ø1-3/8" Ø7/8"
(9) Branching header
(5)
(6)
(6)
Indoor unit
Indoor unit
(8)
(8)
(5) (5)*3
(5)
(5) (5)
(6)
(6)
Indoor unit
Indoor unit
(7) FS unit and indoor unit connection pipe
Indoor unit capacity type
007 to 012 type
015 to 018 type
021 to 054 type
072 to 096 type
(8) Branching and indoor unit connection pipe
Indoor unit capacity type
007 to 012 type
015 to 018 type
(9) Y-shaped branching joint
Total capacity code of indoor units
on downstream side from
Y-shaped branching joint (*4 *5)
Below 61
61 to below 134.5
134.5 to below 239
239 or more
(10) Branching header
Total capacity code of indoor units
on downstream side from
branching header(*4 *5 *6)
For 4 branching
For 8 branching
■ FS unit
Total capacity code of outoor units
on downstream side from FS unit
Below 38
38 to below 61
61 to 96 or less
26
(8) Y-Shaped branching joint
(5)*3
(7)
<Cooling only>
(8)
(5)*3
(7) (7)
Indoor unit Indoor unit
*9<Group control>
In case of two or more indoor units are
connected with FS unit
Gas side Liquid side
Ø3/8"
Ø1/2"
Ø5/8"
Ø7/8"
Gas side
49 ft or less
Pipe length
(Actual length)
Over 49 ft
49 ft or less
Pipe length
(Actual length)
Over 49 ft
021 to 054 type
072 to 096 type
Model name
For 3 pipe
RBM-BY55FUL
RBM-BY105FUL
RBM-BY205FUL
RBM-BY305FUL
Model name
For 3 pipe
Below 134.5 RBM-HY1043FUL
134.5 or more RBM-HY2043FUL
Below 134.5 RBM-HY1083FUL
134.5 or more RBM-HY2083FUL
Max. number of
connectable indoor units
6
8
8
(7)
<Cooling only>
(7)
Indoor unit
Ø1/4"
Ø1/4"
Ø3/8"
Ø1/2"
Liquid side
Ø3/8" Ø1/4"
Ø1/2" Ø3/8"
Ø1/2" Ø1/4"
Ø5/8" Ø3/8"
Ø5/8" Ø3/8"
Ø7/8" Ø1/2"
For 2 pipe
RBM-BY55UL
RBM-BY105UL
RBM-BY205UL
RBM-BY305UL
For 2 pipe
RBM-HY1043UL
RBM-HY2043UL
RBM-HY1083UL
RBM-HY2083UL
Model name
RBM-Y0383FUL
RBM-Y0613FUL
RBM-Y0963FUL