Trane UHSB Installation, Operation And Maintenance Manual page 53

Table 36. Low Output Units Standard Vertical Unit with All Air Ports Open** (continued)
Water
Temp.
Drop Output MBH
Model No. °F (°C) (kW)
20° 310.5
500L (11.1°) (91.0)
30° 281.7
(16.7°) (82.5)
10° 394.4
(5.6°) (115.6)
20° 377.0
600L
(11.1°) (110.5)
30° 342.2
(16.7°) (100.3)
20° 453.7
720L (11.1°) (132.9)
30° 411.7
(16.7°) (120.6)
**Performance based on 200° EWT, 20° T.D., 60° E.A.T. Performance at 10° & 30° T.D. is also shown. For capacities at other conditions, use the correction multipliers in the
tables on page 17.
*Speed controller option is required for reduced ratings.
Table 37. HOT WATER CALCULATIONS AND CORRECTION FACTOR P STYLE
I. CAPACITY @ 20° TD:
A. For 200° EWT, 60° EAT
B. For EWT and/or EAT above or below
Standard
II. CAPACITY AT OTHER TD's
A. For TD's from 5 to 60°F
III. GPM AT OTHER TD's
A. For TD's from 5 to 60°F
IV. PRESSURE LOSS AT OTHER TD's
A.ForTD's from 5 to 60°F
UH-SVX01A-EN
Hot Water Performance Data
Final
Press. Drop
Flow Rate ft/water Temp.
G.P.M. (L/s) m/water °F (°C) Motor H.P. (kW) R.P.M.
32.00 4.23 90.5°
(2.019) (1.290) (32.5)
19.35 1.67 87.7°
(1.221) (.509) (30.9)
54.19 6.83 95.3°
(3.418) (2.083) (35.2)
38.85 3.68 93.7°
(2.451) (1.122) (34.3)
23.51 1.45 90.6°
(1.483) (.442) (32.6)
46.76 4.11 95.1°
(2.950) (1.254) (35.1)
28.28 1.62 91.9°
(1.784) (.494) (33.3)
Read output directly from
22,700 BTU/HR (Ref., Std. 042, p. 12).
Multiply output from Table 35
Table 38.
Multiply output obtained in IA. or IB.
(above) by appropriate factor from
Multiply GPM of unit for 20° TD, from
by appropriate factor from
Multiply P.D. of unit for 20° TD, from
by appropriate factor from
Air.
1-1/2 1160
(1.119)
1-1/2 1160
(1.119)
3 1165
(2.237)
Table 35 & Table 36,
& Table 36 by factor from
Table 39
Table 35 & Table 36
Table 39
Table 35 & Table 36
Table 39
Nominal Outlet
CFM Velocity
3
(m /s) FPM (m/s) Sound Rating
9380 1860 IV
(4.377) (9.449)
10,300 2060 IV
(4.807) (10.465)
11,900 2380 IV
(5.553) (12.090)
EXAMPLE:
UNIT SIZE _________________042
Entering Water Temp. _____160°F
Entering Air Temp. ________ 40°F
Water Temperature Drop ____ 10°F
22,700 x .878 = 19,931 BTU/HR.
IA - 22,700 x 1.15 = 26,105 BTU/HR.
-OR-
IB - 19,931 x 1.15 = 22,921 BTU/HR.
2.34 x 2.30 = 5.38 GPM (Applies only
to units with. Std. 200° EWT, 60° EAT.)
For all others calculate using formula -
GPM = BTU/500 x TD
.06 x 5.00 = .30 Ft. H O
2
53