Engineering Manual

How to Use / How to Install
Distribution Pipe MSDD-50TR-E
Package Air-conditioner Optional Parts Instruction Sheet for Simultaneous Twin Distributing Pipe
Note 1: Limit the number of bends for refrigerant pipes to 8 in each of the 〈A＋B〉 and 〈A＋C〉 ranges.
See the installation manual provided with the main unit for details on chargeless pipe length and refrig-
erant additional charge amount.
1. Perform work, taking care with the followings:
Be sure to check the combination pattern of indoor and outdoor units and joints to be used (Table 2).
Be sure to observe the limits to refrigerant pipe length and number of bends (Table 1).
Insert the refrigerant pipe (procured at local site) and joint into the expanded pipe portions of distributing pipe
(this product) until they stop, and then connect them using anti-oxidization soldering.
There is no restriction on the orientation of distributing pipe (this product)during installation.
Take care that no foreign object, such as dust, enters during pipe connecting work.
Remove the tag of liquid pipe after checking it.
2. Pipe connections
The provided joints will be necessary depending on the capability of model used: See (Table 2), and connect
the joints as shown in (Fig. 2).
Do not bend or widen the distributing pipe (liquid pipe).
Fit gas pipe into pipe covers , and then seal the mated portion of pipe covers ④ using heat insulation seal tape (procured at local site).
Process liquid pipe in the same way.
Make sure that you have all the following parts before installation.
Pipe size and limit to refrigerant pipe
Pipe connections
Combination pattern of indoor and outdoor units and
joints to be used:
Heat insulation work
Cover the entire refrigerant pipe (procured at local site)
with heat insulation material. When using generally available
heat insulation material, heat-resistant insulation material
(at least 12 mm thick).
Pipe covers
4
and
5
will shrink slightly at high temperatures:
Provide wrap margins with insulation material.
Notes:
1.
2.
Please install contents other than this description on the main part of a product with an attached installation description, and use them as it.
See the following for the specifications of gas pipe
,
and liquid pipe
,
Procure the following at local site in addition to the above
・Tape for heat insulator sealing
・Extended pipe for refrigerant pipe
MSDD-50TR
Indoor unit
Indoor unit
Outdoor unit
Distributing pipe
H
h
B
C
A
Wrap margin (Note 2)
Tape (procured at local site)
(Note 1)
Insulation material
(procured at local site) (Note 1)
Wrap margin
Pipe cover
Pipe from local site
Instruction sheet
This sheet 1 sheet
Gas pipe
1pc
Liquid pipe
1pc
Pipe cover (for gas pipe)
1pc 1pc
Pipe cover (for liquid pipe) Joint pipe
7
Flare nut
1/4F 2pcs
1/2F 2pcs
(Fig. 1)
Gas pipe
Liquid pipe
(Fig. 2)
Indoor side Outdoor side Indoor side Outdoor side
Joints Joints
Gas pipe
ID Ø15.88
（to indoor unit）
ID Ø15.88
（to outdoor unit）
ID Ø9.52
（to indoor unit）
ID Ø9.52
（to outdoor unit）
（Model name indication）
Liquid pipe
Tag
For R410A indoor unit.
9.52 6.35···· 2pcs
15.88 12.7······ 2pcs
15.88 19.05···· 1pc
15.88 9.52······ 2pcs
....
....
For R410A (Table 1-2)
Outdoor
unit capacity
71(3Hp)
100
～ 140
(4
～ 6Hp)
−
│B−C│＝
8m or less
50m or less
H =
30m or less
h =
1m or less
15 or less
Ø15.88
(5/8)
35, 50
Ø9.52(3/8)
Ø12.7(1/2)
Ø9.52
(3/8)
75m or less
60~71
Ø15.88(5/8)
Pipe size (mm) Actual pipe length (m)
Height Difference (m)
Number
of bends
Note 1
Gas pipe side
Outdoor unit side Indoor unit side Outdoor unit side
Indoor unit side
Liquid pipe side
Indoor-Outdoor
Indoor-Outdoor
Indoor-Indoor
Indoor-Indoor A＋B＋C＝
(Table 2-2)
Outdoor unit
BOuter Ø15.88−inner Ø12.7 [indoor gas pipe side], AOuter Ø9.52−inner Ø6.35 [indoor liquid pipe side]
DOuter Ø15.88−inner Ø9.52 [indoor gas pipe side], AOuter Ø9.52−inner Ø6.35 [indoor liquid pipe side]
BOuter Ø15.88−inner Ø12.7 [indoor gas pipe side], AOuter Ø9.52−inner Ø6.35 [indoor liquid pipe side]
No joint is necessary.
Indoor unit Joint to be used
For R410A
Installation positions in brackets ( ).
35, 50
Ø6.35(1/4)
60
～ 71
Ø9.52(3/8)
71(3Hp) 35+35 (1.6+1.6)
100(4Hp) 50+50 (2+2)
125(5Hp)
60+60 (2.5+2.5)
140(6Hp) 71+71 (3+3)
A
B
C
D
281