System Heat Pump Outdoor Unit - MegaFrio
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System Heat Pump Outdoor Unit - MegaFrio

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Refrigerant piping installation<br />

Thermal insulation of refrigerant piping<br />

Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with<br />

enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit<br />

and insulating material, and insulating materials themselves. When insulation work is insufficient, there is a<br />

possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.<br />

A Steel wire<br />

B Piping<br />

D E<br />

C Asphaltic oily mastic or asphalt<br />

D <strong>Heat</strong> insulation material A<br />

E Outer covering B<br />

Bad example<br />

Good example<br />

Penetrations<br />

Inner wall (concealed)<br />

A B<br />

Floor (fireproofing)<br />

B A C<br />

32 <strong>Outdoor</strong> <strong>Unit</strong><br />

D<br />

G<br />

B<br />

<strong>Heat</strong><br />

insulation<br />

material A<br />

Outer<br />

covering B<br />

• Do not insulate gas or low pressure pipe and liquid or high<br />

pressure pipe together.<br />

F<br />

A<br />

B<br />

E<br />

C<br />

C<br />

D<br />

B<br />

C<br />

E<br />

G<br />

F<br />

B<br />

F<br />

D<br />

E<br />

D<br />

D<br />

A<br />

E<br />

B<br />

C<br />

H<br />

Glass fiber + Steel wire<br />

Adhesive + <strong>Heat</strong> - resistant polyethylene foam +<br />

Adhesive tape<br />

Indoor Vinyl tape<br />

Floor exposed Water-proof hemp cloth + Bronze asphalt<br />

<strong>Outdoor</strong> Water-proof hemp cloth + Zinc plate + Oily paint<br />

Note:<br />

When using polyethylene cover as covering material, asphalt roofing<br />

shall not be required.<br />

A Liquid pipe<br />

B Gas pipe<br />

C Electric wire<br />

D Finishing tape<br />

E Insulating material<br />

F Transmission cable<br />

A Liquid pipe<br />

B Gas pipe<br />

C Electric wire<br />

D Finishing tape<br />

E Insulating material<br />

F Transmission cable<br />

E<br />

A<br />

F<br />

Outer wall Outer wall (exposed)<br />

D<br />

A B<br />

E<br />

B<br />

Roof pipe shaft<br />

Penetrating portion on fire<br />

limit and boundary wall<br />

I<br />

A<br />

1m<br />

• Be sure to fully insulate connecting portion.<br />

A<br />

A Liquid pipe<br />

B Gas pipe<br />

C Electric wire<br />

D Finishing rectangular pipe<br />

E Insulating material<br />

F Transmission cable<br />

I<br />

1m<br />

J<br />

A These parts are not insulated.<br />

Sleeve<br />

<strong>Heat</strong> insulating material<br />

Lagging<br />

Caulking material<br />

Band<br />

Waterproofing layer<br />

Sleeve with edge<br />

Lagging material<br />

Mortar or other incombustible caulking<br />

Incombustible heat insulation material<br />

When filling a gap with mortar, cover the<br />

penetration part with steel plate so that<br />

the insulation material will not be caved in.<br />

For this part, use incombustible materials<br />

for both insulation and covering.(Vinyl<br />

covering should not be used.)

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