Technical Data - Trane UHSB Installation, Operation And Maintenance Manual

Technical Data: S Models
The performance data listed in
Table 11 includes sound ratings. The
ratings provide a guide in
determining the acceptable degree
of loudness in particular occupancy
situations.
Certain general rules apply to
specific selection of unit heaters with
regard to degree of quietness (or
loudness);
• The greater the fan diameter, the
higher the sound level.
• The higher the motor RPM, the
higher the sound level. Note that
on most units the lower the
speed mode results in lowering
the sound rating one increment.
• Selecting a larger number of
smaller units generally results in
lower overall noise levels than
fewer large units.
All horizontal steam and hot water
unit heater motors, whether fan
guard or shelf-mounted, are isolated
from the mechanical mount by
resilient isolators. This mounting
along with balanced fan blades and
excellent overall construction
integrity, assures you the utmost in
quiet operation.
The following table outlines
RATING for various applications. The
lower the number, the quieter the
unit and the lower the sound
requirement.
28

Technical Data

apartment, assembly hall, classrooms, churches, courtrooms, executive
offices, hospitals, libraries, museums, theatres
dining rooms, general offices, recreation areas, small retail stores
restaurants, banks, cafeterias, department stores, public buildings,
service stations
gymnasiums, health clubs, laundromats, supermarkets
garages, small machine shops, light manufacturing
Factories, foundries, steel mills
*Depending on specific use in these facilities,
size of operation, etc.
Table 12. Corrections When Using Glycol Solution in System
Heat transfer @ 180°F (82°C) with
no increase inflow rate
G.P.M. Req'd. @ 180°F (82°C), 20°F
(11°C) Δ t (no correction to pump
curve)
Pump Head Req'd. @ 180°F (82°C)
w/increase in G.P.M.
Specify gravity (water = 1.0)
Pounds/Gallons @ 60°F (16°C)
(water = 8.3453 Pound/Gallon)
pH @ 50% by volume
SOUND
Freezing Point by volume
*Compared to water.
Table 13. Approximate factors at varying altitudes
Sea level - 1000 ft. (305m)
1000 ft. - 3000 ft. (915m)
3000 ft. - 5000 ft. (1524m)
5000 ft. - 7000 ft. (2134m)
7000 ft. - 10000 ft. (3048m)
CATEGORY OF AREA
20% solution
50% solution
55%
50%
40%
30%
20%
Altitude
SOUND RATING
II
III
IV
III-VII*
Propylene
Glycol
.97*
.90*
1.10%*
1.23%*
1.045-1.055*
8.77
9.5
-
-28°F (-33°C)
-13°F (-25°C)
+ 4°F (-16°C)
+17°F (- 8°C)
Factor
1.00
.958
.929
.900
.871
UH-SVX01A-EN
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