Comfort-Aire HTH Series - Manual (Page 34)

34
Installation, Operation & Maintenance HTV/HTD/HTH SERIES Heat Controller, Inc.
Unit Operating Conditions
Table 10: Water Temperature Change Through Heat Exchanger
 

Antifreeze Type
Antifreeze
%
Cooling Heating
WPD
Corr. Fct.
EWT 30°F
EWT 90°F EWT 30°F
Total Cap Sens Cap Power Htg Cap Power
Water 0 1.000 1.000 1.000 1.000 1.000 1.000
Propylene Glycol
5 0.995 0.995 1.003 0.989 0.997 1.070
15 0.986 0.986 1.009 0.968 0.990 1.210
25 0.978 0.978 1.014 0.947 0.983 1.360
Methanol
5 0.997 0.997 1.002 0.989 0.997 1.070
15 0.990 0.990 1.007 0.968 0.990 1.160
25 0.982 0.982 1.012 0.949 0.984 1.220
Ethanol
5 0.998 0.998 1.002 0.981 0.994 1.140
15 0.994 0.994 1.005 0.944 0.983 1.300
25 0.986 0.986 1.009 0.917 0.974 1.360
Ethylene Glycol
5 0.998 0.998 1.002 0.993 0.998 1.040
15 0.994 0.994 1.004 0.980 0.994 1.120
25 0.988 0.988 1.008 0.966 0.990 1.200
Antifreeze Correction Table
Table 9a: HT Coax Water Pressure Drop
Model GPM
Pressure Drop (psi)
30°F 50°F 70°F 90°F
026
2.3
3.0
3.4
4.5
6.0 0.7
1.1
1.3
2.0
3.1 0.4
0.7
0.9
1.4
2.3 0.4
0.6
0.8
1.2
1.9 0.5
0.7
0.8
1.2
1.8
038
3.0
4.5
6.0
6.8
9.0 1.5
2.6
3.8
4.5
6.9 0.9
1.7
2.7
3.2
5.2 0.8
1.5
2.3
2.7
4.4 0.9
1.5
2.2
2.6
4.1
049
4.5
6.0
6.8
9.0
12.0
1.5
2.6
3.8
4.5
6.9 0.6
1.1
1.4
2.5
4.2 0.5
1.0
1.3
2.3
3.8 0.3
0.9
1.2
2.2
3.5
064
6.0
7.5
9.0
11.3
12.0
15.0
0.9
1.7
2.5
3.7
4.1
6.1 0.2
0.9
1.5
2.6
3.0
4.7 0.2
0.7
1.3
2.3
2.6
4.1 0.3
0.8
1.4
2.3
2.6
4.0
072
7.0
8.5
10.5
12.8
14.0
17.0
1.4
2.2
3.3
4.6
5.4
7.6 0.7
1.3
2.2
3.4
4.1
6.0 0.5
1.1
1.9
3.0
3.6
5.4 0.7
1.2
2.0
2.9
3.5
5.2
024
036
048
060
070