Ground Loop Heat Pump Applications - ClimateMaster Trilogy Variable (VE) Series Installation, Operation & Maintenance Instructions Manual

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
3/4" IPS SDR11
1" iPS SDR11
Polyethylene 1.25" IPS SDR11
1.5" IPS SDR11
2" IPS SDR11
Unit Heat Exchanger Typical
10" Dia x 3ft tall
Flush Cart Tank
[25.4cm x 91.4cm tall]
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WARNING!
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
for Low Temperature Protection
Type
10°F
[-12.2°C]
Methanol
21%
Propylene Glycol 29%
Ethanol* 23%
* Must not be denatured with any petroleum based product
Trilogy
Size Volume (gal) [liters]
1" 4.1 [15.3]
1.25" 6.4 [23.8]
2.5" 9.2 [34.3]
2.8 [10.4]
4.5 [16.7]
8.0 [29.8]
10.9 [40.7]
18.0 [67.0]
1.0 [3.8]
10 [37.9]
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Minimum Temperature
15°F 20°F 25°F
[-9.4°C] [-6.7°C] [-3.9°C]
17% 13% 8%
24% 18% 12%
20% 16% 11%
c l i m a t e m a s t e r . c o m
Variable ( VE ) Series IOM - 60Hz HFC-410A
®

Ground Loop Heat Pump Applications

Contact your ClimateMaster distributor if you have any
questions as to antifreeze selection.
⚠
WARNING!
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!
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
to draw in directly to prevent fuming) until attaining the
proper antifreeze protection. The rise in flush reservoir
level indicates amount of antifreeze added (some carts
are marked with measurements in gallons or liters). A
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
R e v i s i o n D a t e : 2 2 D e c e m b e r , 2 0 2 1
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