Residential Structure Pipe Entry/Exit - Bosch Geothermal Heat Pumps Applications Manual

8 8 | Bosch Geothermal Heat Pumps
12 Residential Structure Pipe
Entry/Exit
The entry and exit points from a residential structure
should be watertight and constructed to prevent leaks
(Fig. 98). Piping sleeves should be used at all entry and
exit points. Sleeves should extend a minimum of twelve
inches out from the foundation and be constructed and
installed in compliance with local building codes and
ordinances. Sleeves serve to minimize shearing stresses
from ll settling and help minimize damage to the home's
foundation.
Fig. 98
Courtesy of International Ground Source Heat Pump Association/Oklahoma
State University
If at any point the return or supply line will cross a water
line, the line should be enclosed in a sleeve until ten feet
of separation is achieved. There should be a minimum
separation of two feet between the return or supply lines
and water or sewer lines.
Installers should always seal and protect the entry and
exit points of any ground heat exchanger into a residential
structure. Hydraulic cement is recommended.
With a new construction situation exists, installers should
attempt to position the pipe in the proper location prior to
any wall construction or slab pouring. As piping can wear
due to expansion and contraction, it should be protected
with a chase through the slab with PVC elbows and sleeves
as shown (Fig. 99).
Data subject to change
Fig. 99
Courtesy of International Ground Source Heat Pump Association/Oklahoma
State University
Always trench as close as possible to the footing and bring
the pipe up along the outside wall of the footing until it
is above the slab. The pipe should enter the structure as
close to the slab as construction allows. Always shield and
insulate geothermal piping to protect it from damage and
the weather as shown (Fig. 100).
Fig. 100
Courtesy of International Ground Source Heat Pump Association/Oklahoma
State University
With crawl space applications involving pier and beam
for either new or retro t construction, always bury the
pipe beneath the footing and between piers so that it is
directly below the point of entry into the structure. Bring
the piping into the structure and protect it with insulated
shielding if possible as shown (Fig. 101).
Applications Manual
Bosch Thermotechnology Corp.