Caution, Ground-loop heat pump applications, Table 2: antifreeze percentages by volume – Comfort-Aire HKV300A User Manual
Page 14: Figure 6: typical earth loop application, Hkv series
Installation, Operation & Maintenance
HKV SERIES
Heat Controller, LLC
13
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 6. All earth loop piping materials should be limited to
only polyethylene fusion for inground sections of the loop.
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should be avoided due to their potential to leak in earth coupled
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ment means. Earth loop temperatures can range between 25
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l/m to 3.23 l/m per kW) of cooling capacity is recommended in
these applications. Upon completion of the ground loop piping,
pressure test the loop to assure a leak free system.
Flushing the Earth Loop
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system to remove all foreign objects and purge to remove all air.
Table 2: Antifreeze Percentages by Volume
Ground-Loop Heat Pump Applications
Figure 6: Typical Earth Loop Application
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CAUTION! The following instructions represent indus-
try accepted installation practices for Closed Loop Earth
Coupled Heat Pump Systems. They are provided to assist
the contractor in installing trouble free ground loops. These
instructions are recommended only. State and Local Codes
MUST be followed and installation MUST conform to ALL
applicable Codes. It is the responsibility of the Installing con-
tractor to determine and comply with ALL applicable Codes
and Regulations.
Type
Minimum Temperature for Low Temperature Protection
10°F [-12.2°C]
15°F [-9.4°C]
20°F [-6.7°C]
25°F [-3.9°C]
Methanol
100% USP food grade Propylene Glycol
Ethanol*
25%
38%
29%
21%
25%
25%
16%
22%
20%
10%
15%
14%
* Must not be denatured with any petroleum based product
CAUTION!
!
!