Standard Piping Diagram; Checkpoints; Piping Materials And Work Precautions - Sanyo SHP-TH90GDN-SW Technical Manual

3. Piping work

3-1 Standard piping diagram

Pipe connections between the tank unit and heat pump unit
Connect A and A (hot water pipe).
Connect B and B (cold water pipe).
Heat pump
unit

3-2 Checkpoints

• Use water which meets quality standards of the Water Supply Law.
• The hot water supply pipes are subject to expansion and contraction. Therefore, when running them
through concrete walls or slabs, use sleeves, and when burying them, place them inside sleeves or
sheaths, and then seal them at both ends to prevent the rain from entering. Do not fix or clamp the pipes.
Be absolutely sure to insulate them.
• Take care not to apply too much sealant to the pipe joins since the excess may clog the pipes.
• When the piping materials are threaded or cut, oil and dirt will adhere to the pipes. After threading or
cutting them, therefore, clean the pipes using a neutral detergent, and then connect the pipes.
(Otherwise, trouble or malodors may arise.)
Chamfer the pipes to eliminate scratches and burrs.
• Copper pipes with an outside diameter of 22 mm are recommended for use as the pipes which connect
the heat pump unit with the tank unit.

3-3 Piping materials and work precautions

• Be absolutely sure to use 1/2PT screws to connect the heat pump unit and pipes.
• Cover the ends of the pipes with tape, etc. until they are attached to the equipment so as to
prevent small stones, dirt and other foreign matter from entering.
• Insulate the cold water and hot water copper pipes with heat-insulating materials which are at least
10 mm thick.
B circulation outlet port (cold water)
A (outlet)
Connect A and A.
Connect B and B.
B (inlet)
A circulation return port (hot water)
Tank unit