Ground Loop Heat Pump Applications - ClimateMaster Tranquility 30 Digital TE Series Installation, Operation & Maintenance Instructions Manual

Tranquility 30 Digital ( TE) Series IOM - 60Hz HFC-410A
®
R e v . : O c t o b e r 5 , 2 0 2 1

Ground Loop Heat Pump Applications

Antifreeze Selection - General
In areas where minimum entering loop temperatures drop
below 40°F [4.4°C] or where piping will be routed through
areas subject to freezing, antifreeze is needed. Alcohols and
glycols are commonly used as antifreeze solutions. Your local
representative should be consulted for the antifreeze best
suited to your area. Freeze protection should be maintained
to 15°F [8.5°C] below the lowest expected entering loop
temperature.
Initially calculate the total volume of fluid in the piping system
using Table 3. Then use the percentage by volume shown in
Table 4 for the amount of antifreeze. Antifreeze concentration
should be checked from a well mixed sample using a
hydrometer to measure specific gravity.
Table 3: Fluid Volume
Fluid Volume (gal [liters] per 100' [30 meters] Pipe)
Pipe
Copper
Polyethylene
Unit Heat Exchanger
Flush Cart Tank
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WARNING! Always dilute alcohols with water (at least 50%
solution) before using. Alcohol fumes are flammable and
can cause serious injury or death if not handled properly.
When handling methanol (or any alcohol), always wear
eye protection and rubber gloves as alcohols are easily
absorbed through the skin.
Table 4: Antifreeze Percentages by Volume
Type
Methanol
Propylene Glycol
Ethanol*
* Must not be denatured with any petroleum based product
20
Size Volume (gal) [liters]
1" 4.1 [15.3]
1.25" 6.4 [23.8]
2.5" 9.2 [34.3]
3/4" IPS SDR11 2.8 [10.4]
1" iPS SDR11 4.5 [16.7]
1.25" IPS SDR11 8.0 [29.8]
1.5" IPS SDR11 10.9 [40.7]
2" IPS SDR11 18.0 [67.0]
Typical 1.0 [3.8]
10" Dia x 3ft tall
10 [37.9]
[25.4cm x 91.4cm tall]
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WARNING!
Minimum Temperature
for Low Temperature Protection
10°F 15°F 20°F
[-12.2°C] [-9.4°C] [-6.7°C]
21% 17% 13%
29% 24% 18%
23% 20% 16%
G e o t h e r m a l H e a t i n g a n d C o o l i n g
Contact your ClimateMaster distributor if you have any
questions as to antifreeze selection.
WARNING! Always use properly marked vehicles (D.O.T.
placards), and clean/suitable/properly identified containers
for handling flammable antifreeze mixtures. Post and
advise those on the jobsite of chemical use and potential
dangers of handling and storage.
NOTICE: DO NOT use automotive windshield washer fluid as
antifreeze. Washer fluid contains chemicals that will cause
foaming.
CAUTION! Always obtain MSDS safety sheets for all
chemicals used in ground loop applications including
chemicals used as antifreeze.
Antifreeze Charging
It is highly recommended to utilize premixed antifreeze fluid
where possible to alleviate many installation problems and
extra labor.
The following procedure is based upon pure antifreeze and
can be implemented during the Full Flush procedure with three
way valves in the Figure 15c - Valve Position C. If a premixed
mixture of 15°F [-9.4°C] freeze protection is used, the system
can be filled and flushed with the premix directly to prevent
handling pure antifreeze during the installation.
1) Flush loop until all air has been purged from system and
pressurize to check for leaks before adding
any antifreeze.
2) Run discharge line to a drain and hook up antifreeze drum
to suction side of pump (if not adding below water level
through approved container). Drain flush cart reservoir
down to pump suction inlet so reservoir can accept the
volume of antifreeze to be added.
3) Calculate the amount of antifreeze required by first
calculating the total fluid volume of the loop from Table 3.
Then calculate the amount of antifreeze needed using Table
4 for the appropriate freeze protection level. Many southern
applications require freeze protection because of exposed
piping to ambient conditions.
4) Isolate unit and prepare to flush only through loop (see
Figure 15a). Start flush cart, and gradually introduce the
required amount of liquid to the flush cart tank (always
introduce alcohols under water or use suction of pump
25°F
to draw in directly to prevent fuming) until attaining the
[-3.9°C]
proper antifreeze protection. The rise in flush reservoir
8%
level indicates amount of antifreeze added (some carts
12%
are marked with measurements in gallons or liters). A
11%
ten inch [25.4 cm] diameter cylinder, 3 foot [91.4 cm] tall
holds approximately 8 gallons [30.3 liters] of fluid plus
the hoses (approx. 2 gallons, [7.6 liters], which equals
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WARNING!
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CAUTION!
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