c l i m a t e m a s t e r.c o m
27
Tranquility
®
(TRL) Series
R e v. : N o v e m b e r 1 1 , 2 0 2 1
CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Ground-Loop Heat Pump Applications, Cont’d.
if 30°F [-1°C] is the minimum expected
entering loop temperature, the leaving
loop temperature would be 22 to 25°F
[-6 to -4°C] and freeze protection should
be at 15°F [-10°C].
Calculation is as follows:
30°F - 15°F = 15°F [-1°C - 9°C = -10°C].
All alcohols should be premixed and
pumped from a reservoir outside of the
building when possible or introduced under
the water level to prevent fumes. Calculate
the total volume of fluid in the piping system.
Then use the percentage by volume shown
in Table 4 for the amount of antifreeze
needed. Antifreeze concentration should be
checked from a well mixed sample using a
hydrometer to measure specific gravity.
⚠
WARNING!
⚠
WARNING!
In the event of a power
outage generator powered backup
water pumping must be used to insure
the water loop temperature does not
drop below freezing. If motorized water
valves are used in the system they
must be set to fail (normally) open
which will allow water to flow through
the heat exchanger in the event there
is power loss in the building.
Table 4: Antifreeze Percentages by Volume
Type
Minimum Temperature for Low Temperature Protection
10°F [-12.2°C]
15°F [-9.4°C]
20°F [-6.72°C]
25°F [-3.92°C]
Methanol
25%
21%
16%
10%
100% USP food grade inhibited
Propylene Glycol
38%
25%
22%
15%
Ethanol*
29%
25%
20%
14%
* Must not be denatured with any petroleum based product