Heat Controller HTV Series Installation, Operation & Maintenance Instructions Manual page 17

GROUND-LOOP HEAT PUMP APPLICATIONS
Heat Controller, Inc.
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 uid in the piping system.
Then use the percentage by volume shown
in Table 2 and 2a for the amount of
antifreeze needed. Antifreeze
concentration should be checked from a
well mixed sample using a hydrometer to
measure speci c gravity.
Methanol
100% USP Food Grade Propylene Glycol
Ethanol*
* Must not be denatured with any petroleum based product
Table 2a: Approximate Fluid Volume (gal.)
Pipe
Copper
Rubber Hose
Polyethylene
Unit Heat
Exchanger
HTV/HTD/HTH SERIES
Table 2: Antifreeze Percentages by Volume
Type
per 100' of Pipe
Fluid Volume (gal. 100' Pipe)
Size Volume (gal)
1"
1.25"
2.5"
1"
¾" IPS SDR11
1" IPS SDR11
1.25" IPS SDR11
1.5" IPS SDR11
2" IPS SDR11
1.25" IPS SCH40
1.5" IPS SCH40
2" IPS SCH40
Typical
LOW WATER TEMPERATURE CUTOUT
SETTING
CXM Control
When antifreeze is selected, the FP1 jumper
(JW3) should be clipped to select the low
temperature (antifreeze 13°F) set point and
avoid nuisance faults (see "Low Water
Temperature Cutout Selection" in this
manual).
Minimum Temperature for Low Temperature Protection
10°F 15°F
25% 21%
38% 25%
29% 25%
Figure 6a: Typical Ground Loop
4.1
6.4
9.2
3.9
2.8
4.5
8.0
10.9
18.0
8.3
10.9
17.0
1.0
13
16
20°F 25°F
16% 10%
22% 15%
20% 14%
Application