13
R e s i d e n t i a l D i g i t a l H & V - Tr a n q u i l i t y
®
2 2 D i g i t a l ( T Z ) S e r i e s - 6 0 H z H F C - 4 1 0 A
C r e a t e d : 2 6 O c t . , 2 0 1 1 B
c l i m a t e m a s t e r. c o m
Ground-Loop Heat Pump Applications
With industry leading ‘plug and play’ options for a one-unit
ground loop system, a TZ unit with Internal Flow Controller
(IFC) would be used.
Pre-Installation
Prior to installation, locate and mark all existing underground
utilities, piping, etc. Install loops for new construction before
sidewalks, patios, driveways, and other construction has
begun. During construction, accurately mark all ground loop
piping on the plot plan as an aid in avoiding potential future
damage to the installation.
Piping Installation
The typical closed loop ground source system is shown in
Figure 12a. All earth loop piping materials should be limited
to polyethylene fusion only for in-ground sections of the
loop. Galvanized or steel
fi
ttings should not be used at any
time due to their tendency to corrode. All plastic to metal
threaded
fi
ttings should be avoided due to their potential to
leak in earth coupled applications. A
fl
anged
fi
tting should be
substituted. Earth loop temperatures can range between
25 and 110°F [-4 to 43°C]. Flow rates between 2.25 and 3
gpm per ton [2.41 to 3.23 l/m per kW] of cooling capacity is
recommended in these applications.
Test individual horizontal loop circuits before back
fi
lling.
Test vertical U-bends and pond loop assemblies prior to
installation. Pressures of at least 100 psi [689 kPa] should be
used when testing. Do not exceed the pipe pressure rating.
Test entire system when all loops are assembled.
