Tranquility
®
Fluid Cooler – 60 Hz
R e v. : F e b r u a r y 2 2 , 2 0 2 2
G e o t h e r m a l H e a t i n g a n d Co o l i n g
16
Loop Antifreeze Protection
Antifreeze Selection - General
Antifreeze is required if the system can be subjected to
ambient temperatures below 35°F. Alcohols and glycols
are commonly used as antifreeze solutions. Your local
representative should be consulted for the antifreeze best
suited to your area. In the event of a power outage, freeze
protection should be maintain in the system to the lowest
subjected ambient conditions.
Initially calculate the total volume of fluid in the piping
system using Table 2. Then use the percentage by
volume shown in Table 3 for the amount of antifreeze. If
the minimum ambient temperature that can be reached
is less than shown in Table 3 please contact your local
representative for the appropriate percentage to protect
the system. Antifreeze concentration should be checked
from a well mixed sample using a hydrometer to measure
specific gravity.
Table 2: Fluid Volume
⚠
WARNING!
⚠
Fluid Volume (gal [liters] per 100’ [30 meters] Pipe)
Pipe
Size
Volume (gal) [liters]
Copper
1”
4.1 [15.3]
1.25”
6.4 [23.8]
2.5”
9.2 [34.3]
Polyethylene
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]
Fluid Cooler
036/060
7.4 [28]
Flush Cart Tank
10” Dia x 3ft tall
[25.4cm x 91.4cm tall]
10 [37.9]
Table 3: Antifreeze Percentages by Volume
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
Propylene Glycol
Ethanol*
21%
29%
23%
17%
24%
20%
13%
18%
16%
8%
12%
11%
* Must not be denatured with any petroleum based product
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.
Contact your ClimateMaster distributor if you have any
questions as to antifreeze selection.
⚠
WARNING!
⚠
⚠
CAUTION!
⚠
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 10c - 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 2. Then calculate the amount of antifreeze
needed using Table 3 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 10a). 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
