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When
fi
lling a gap with mortar, cover the penetration part with steel plate so
that the insulation material will not be caved in. For this part, use incombustible
materials for both insulation and covering. (Vinyl covering should not be used.)
Insulation materials for the pipes to be added on site must meet the following
speci
fi
cations:
Pipe size
ø6.35 to 25.4 mm
[1/4 to 1 in]
ø28.58 to 41.28 mm
[1-1/8 to 1-21/32 in]
Thickness
10 mm min.
[13/32 in min.]
15 mm min.
[19/32 in min.]
Temperature Resistance
100°C min. [212°F min.]
* Installation of pipes in a high-temperature high-humidity environment, such
as the top
fl
oor of a building, may require the use of insulation materials
thicker than the ones speci
fi
ed in the chart above.
* When certain speci
fi
cations presented by the client must be met, ensure that
they also meet the speci
fi
cations on the chart above.
•
Penetrations
[Fig. 10.4.4]
(Unit: mm [in])
<A> Inner wall (concealed)
<B> Outer wall
A B
A B
C
D
<C> Outer wall (exposed)
<D> Floor (waterproo
fi
ng)
EB
I
D
F
G
B
<E> Roof pipe shaft
<F> Penetrating portion on
fi
re limit and
boundary wall
G
D
B
H
F
1000
1000
[39-3/8]
[39-3/8]
A
I
J
A
Sleeve
B
Heat insulating material
C
Lagging
D
Caulking material
E
Band
F
Waterproo
fi
ng layer
G
Sleeve with edge
H
Lagging material
I
Mortar or other incombustible caulking
J
Incombustible heat insulation material
10.4. Thermal insulation of refrigerant
piping
Be sure to add insulation work to refrigerant piping by covering liquid pipe and
gas pipe separately with enough thickness heat-resistant polyethylene, so that
no gap is observed in the joint between indoor unit and insulating material, and
insulating materials themselves. When insulation work is insuf
fi
cient, there is a
possibility of condensation drip, etc. Pay special attention to insulation work in
the ceiling plenum.
[Fig. 10.4.1]
A
C
B
D
E
A
Steel wire
B
Piping
C
Oily mastic asphalt or asphalt
D
Heat insulation material A
E
Outer covering B
Heat
insulation
material A
Glass
fi
ber + Steel wire
Ad Heat - resistant polyethylene foam + Adhesive tape
Outer
covering B
Indoor
Vinyl tape
Floor exposed Water-proof hemp cloth + Bronze asphalt
Outdoor
Water-proof hemp cloth + Zinc plate + Oily paint
Note:
When using polyethylene cover as covering material, asphalt roo
fi
ng
shall not be required.
No heat insulation must be provided for electric wires.
[Fig. 10.4.2]
A
B
C
D
E
A
B
E
D
E
A
Liquid pipe
B
Gas pipe
C
Electric wire
D
Finishing tape
E
Insulator
[Fig. 10.4.3]
•
•
[Fig. 10.3.3]
<If the cylinder does not have a siphon pipe, charge with the refrigerant cylinder upside-down.>
A
A
Siphon pipe