BPMKS049A3U Installation Manual

12 English
Connection of Refrigerant Piping
Gas leakage check
• Perform gas leakage check after the completion of
piping work.
• After the leakage check, attach heat insulation
materials and wind the tape around the heat
insulation materials so that no gap is made between
them.
For the inter-unit piping, use the heat insulation
materials in conformity with the following
specifications.
Thermal conductivity: 0.024-0.030Btu/fth°F
(0.041-0.052W/mK)
Thickness: 1/2 inch (13mm) or more
Heat resistance: 212°F (100°C) or more
• Secure the local inter-unit piping near the BP unit
using clasps (field supply) so that the BP unit does
not directly receive the weight of the inter-unit piping.
1.
Insulation of pipes
1) Attach the heat insulation and the heat
insulation (field supply) to each pipe.
2) To eliminate a gap between the heat insulation,
secure the butting surfaces (shaded sections on
the right figure) with a silicon resin type adhesive
(field supply).
3) When insulating the pipes, attach the heat
insulation tape and adhesive tape (field supply)
to prevent air from entering into the heat
insulation.
2.
Unconnected pipes
1) Attach the heat insulation (field supply) and the
heat insulation.
2) Attach the heat insulation tape and adhesive
tape (field supply) to prevent air from entering
into the heat insulation.
BP unit
Indoor unit
side piping
Outdoor unit
side piping
Check the parts enclosed by for leakage.
• Check carefully by applying soapy water.
• Wipe soapy water thoroughly after checking.
Inter-unit piping
Clasp
(field supply)
Indoor unit
side piping
Heat insulation
Attach it closely so as not to make any gap
and wind E heat insulation tape around it.
Clasp
(field supply)
Inter-unit piping
Outdoor unit
side piping
Attach it closely so as not to make any gap and
wind adhesive tape (field supply) around it.
BP unit
E
Adhesive
(field supply)
Heat insulation
tape (short)
E
Refrigerant pipe
insulation material
Heat insulation
(field supply)
Heat insulation
K
Heat insulation
tape (middle)
E
Heat insulation
tape (long)
E
Adhesive tape
(field supply)
K
E
Heat insulation
K
Heat insulation
(field supply)
Adhesive
(field supply)
Heat insulation tape (short)
E
Adhesive tape
(field supply)
Heat insulation
tape (middle)
E
Heat insulation
tape (long)
E
K
E
01_EN_3P329626-1.fm Page 12 Friday, November 9, 2012 11:10 AM