Mitsubishi Electric City Multi R2 Series Installation Manual page 35

・Make sure that the pipe connections all the way from the indoor unit are properly insulated.
9-7-2. Insulation for the section of the pipe that goes through a wall
(1) Inner wall (concealed)
Ⓐ Ⓑ
(4) Floor (waterproof)
Ⓓ
Ⓕ
Ⓖ
Ⓑ
Ⓐ
Sleeve
Ⓑ
Insulation material
Ⓒ
Lagging
Ⓓ
Caulking material
Ⓔ
Band
Ⓕ
Waterproof layer
Ⓖ
Sleeve with a flange
Ⓗ
Caulk with a nonflammable material such as mortar.
Ⓘ
Nonflammable insulation material
・When caulking the gaps with mortar, cover the section of the pipe that goes through the wall with a metal sheet to
prevent the insulation material from sagging. For this section, use nonflammable insulation and covering materials.
(Vinyl tape should not be used.)
WT08432X01
(2) Outer wall
Ⓓ
Ⓒ
Ⓐ
Ⓑ
(5) Rooftop pipe shaft
Ⓓ
Ⓑ
Ⓒ
Ⓕ
(3) Outer wall (exposed)
Ⓔ
Ⓑ
Ⓗ
(6) Protecting the penetrating parts in a fire limit zone
or through a parting wall
Ⓗ
Ⓐ
1000 1000
(39-3/8) (39-3/8)
GB-33
Ⓘ
[mm (in)]