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48 UH-SVX01A-EN
Hot Water Performance Data
Table 31. HOT WATER CONVERSION FACTORS BASED ON 200° (93°C) ENTERING WATER, 60° (16°C) ENTERING AIR
AND 20° (11°C) TEMPERATURE DROP
ENTERING
AIR
TEMPERAT
URE °F (°C)
ENTERING WATER TEMPERATURE - °F (°C)
100°
(38)
120°
(49)
140°
(60)
160°
(71)
180°
(82)
200°
(93)
220°
(104)
240°
(116)
260°
(127)
280°
(138)
300°
(149)
30 -(1) 0.518 0.666 0.814 0.963 1.120 1.268 1.408 1.555 1.702 1.850 1.997
40 (4) 0.439 0.585 0.731 0.878 1.025 1.172 1.317 1.464 1.609 1.755 1.908
50 (10) 0.361 0.506 0.651 0.796 0.941 1.085 1.231 1.375 1.518 1.663 1.824
60 (16) 0.286 0.429 0.571 0.715 0.857 1.000 1.143 1.286 1.429 1.571 1.717
70 (21) 0.212 0.353 0.494 0.636 0.777 0.918 1.060 1.201 1.342 1.483 1.630
80 (27) 0.140 0.279 0.419 0.558 0.698 0.837 0.977 1.117 1.257 1.397 1.545
90 (32) 0.069 0.207 0.345 0.483 0.621 0.759 0.897 1.035 1.173 1.311 1.462
100 (38) 0.000 0.137 0.273 0.409 0.546 0.682 0.818 0.955 1.094 1.230 1.371
Table 32. HOT WATER OUTPUT, FLOW RATE AND PRESSURE LOSS FACTORS BASED ON STANDARD CONDITIONS OF
200°F (93°C) ENTERING WATER, 60°F (16°C) ENTERING AIR & 20°F (11°C) WATER DROP
USE FACTORS FROM THIS TABLE TO OBTAIN
APPROXIMATE RESULTS
TEMPERATURE DROP °F (°C)
5
(3)
10
(6)
15
(8)
20
(11)
25
(14)
30
(17)
40
(22)
50
(28)
60
(33)
To obtain output for other Water Temperature Drops,
multiply basic output rating by applicable Factor.
1.25 1.15 1.08 1.00 .94 .90 .83 .76 .72
To obtain flow for other Water Temperature Drops,
multiply basic rate rating by applicable Factor.*
5.00 2.30 1.44 1.00 .74 .59 .40 .30 .24
To obtain Pressure Loss Feet (Meters) of Water for other
temperature Drops, multiply Basic loss at 20°F (11°C)
drop by Factor.
10.00 5.00 2.00 1.00 .60 .40 .20 .13 .07
Table 33. MINIMUM WATER FLOW
MODEL No. A08 A18 A25 A36 18 24 36 48 60 72 84 96
MINIMUM GPM (L/s) 0.125
(.008)
0.125
(.008)
0.125
(.008)
0.125
(.008)
0.750
(.047)
1.240
(.078)
1.240
(.078)
1.490
(.094)
1.490
(.094)
1.620
(.102)
1.860
(.117)
3.350
(.211)
MODEL No. 108 120 132 144 156 180 204 240 280 300 360
MINIMUM GPM (L/s) 3.35
(.211)
3.60
(.227)
4.09
(.258)
4.09
(.258)
4.09
(.258)
4.34
(.274)
4.34
(.274)
4.59
(.290)
4.59
(.290)
6.08
(.384)
6.08
(.384)
Table 34. HEATING CAPACITY FACTORS FOR VARIOUS RATES OF WATER FLOW
% of Rated Water Flow 25% 50% 75% 100% 125% 150% 175%
Heating Capacity Factor .80 .89 .96 1.00 1.04 1.07 1.10