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HIGH MOUNTED HEATERS HIGH MOUNTED
HEATERS
T
ECHNICAL
G
UIDE
F
OR
:
TGHMS-1
HMS High Mounted Unit With Steam Or Hot Water Coils
HMG High Mounted Unit With Gas Furnace 2
In 1875, Mr. L.J. Wing founded the L.J Wing Company with his
invention of a disc fan with variable pitched blades. Mr. Wing
produced many notable inventions and was recognized by the
American Institute for his outstanding achievements. These
include his introduction of the first steam turbine driven fan in
1905; his development of the first floor mounted steam unit
heater in 1917; and also in 1917, a test on the U.S.S. Kimberly
using L.J. Wing pressure type fans that resulted in over 200
World War I Navy ships being fitted with those ventilation fans.
In 1920, L.J. Wing revolutionized the heating industry by
producing The Featherweight Heater which utilized a light-
weight copper heating coil and became the first overhead unit
heater. This led to the first Door Heater in 1921, the first integral
face and bypass make-up air system (L.J. Wings FAS) in 1933,
and the first rotating discharge nozzle in 1939.
During World War II, L.J. Wings total manufacturing capacity
was directed to the production of ventilating fans that were
used on virtually all Naval landing and cargo ships of that
period. After World War II, the L.J. Wing Company introduced
the first Integral Face and Bypass Constant Volume Coil in
1961; the Vari-jet discharge in 1963; Gas Assembly Heaters
with mounting heights over 100 feet in 1965; the Genex in 1985
(the first rotary heat exchanger indirect fired gas heater); and
the Door Air Curtains in 1998.
4830 Transport Drive, Dallas, TX 75247 Tel. (214)638-6010 Fax (214) 905-0806
www.ljwing.com
In the interest of product improvement, L.J. Wing reserves the right to make changes without notice. 3
TABLE OF CONTENTS
HMS & HMG Performance Tables . . . . . . . . . . . . . . . . . . . . . . . . .4
HMS & HMG Sound Power Levels . . . . . . . . . . . . . . . . . . . . . . . . .4
HMS Hot Water Correction Factors. . . . . . . . . . . . . . . . . . . . . . . . .5
Dimensions - HMS Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Dimensions - HMG Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Dimensions - HMS & HMG Discharges . . . . . . . . . . . . . . . . . . . . .8
Discharge Mounting Heights and Coverage . . . . . . . . . . . . . . . . . .9
Selection Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Energy Saving Truss Thermostats - HMG Units . . . . . . . . . . . . . .10
Typical Specifications - HMS Units. . . . . . . . . . . . . . . . . . . . . . . .11
Typical Specifications - HMG Units. . . . . . . . . . . . . . . . . . . . . . . .12 Octave Bands - Center Frequency
Model
1
2
3
4
5
6
7
8
LWA
HMS-10
35
40
40
39
37
34
31
26
46
HMS-15
36
41
41
40
38
35
32
27
47
HMS-20
35
40
41
40
38
35
32
27
47
HMS-30
35
40
41
40
39
35
32
27
47
HMG-5
31
36
44
38
35
31
28
23
46
HMG-7
33
37
46
40
37
34
31
25
48
HMG-10
33
39
46
40
37
34
31
25
48
HMG-15
33
39
46
40
37
34
31
25
48
60
°
Design Space
70
°
Design Space
Temperature
Temperature
Mtg.
Operating
Height
Weight
Size
in Feet
(lbs)
Coverage
BTUH
(1)
CFM
HP
Coverage
BTUH
(1)
CFM
HP
STEAM
HMS-10
75
3150
160 x 160
1,430,000
24,000
10
160 x 160
1,320,000
23,200
10
HMS-15
85
3300
180 x 180
1,520,000
26,700
15
180 x 180
1,400,000
25,700
15
HMS-20
95
3500
210 x 210
1,600,000
29,300
20
210 x 210
1,470,000
28,200
20
HMS-30
115
3650
240 x 240
1,640,000
30,800
25
240 x 240
1,520,000
30,000
25
60
°
Design Space
70
°
Design Space
Temperature
Temperature
Mtg.
Operating
Height
Weight
Size
in Feet
(lbs)
Coverage
BTUH
(1)
CFM
HP
Coverage
BTUH
(1)
CFM
HP
HOT WATER
HMS-10
75
3150
160 x 160
1,310,000
24,000
10
160 x 160
1,180,000
23,200
10
HMS-15
85
3300
180 x 180
1,380,000
26,700
15
180 x 180
1,240,000
25,700
15
HMS-20
95
3550
210 x 210
1,450,000
29,300
20
210 x 210
1,300,000
28,200
20
HMS-30
115
3650
240 x 240
1,480,000
30,800
30
240 x 240
1,340,000
30,000
25
60
°
Design Space
70
°
Design Space
Temperature
Temperature
Mtg.
Operating
Height
Weight
Size
in Feet
(lbs)
Coverage
BTUH
(1)
CFM
HP
Coverage
BTUH
(1)
CFM
HP
GAS
HMG-5
75
5750
160 x 160
1,280,000
23,700
2 @ 5
160 x 160
1,280,000
23,400
2 @ 5
HMG-7
85
5950
180 x 180
1,280,000
26,000
2 @ 5
180 x 180
1,280,000
25,800
2 @ 5
HMG-10
95
6200
210 x 210
1,280,000
28,000
2 @ 7.5
210 x 210
1,280,000
27,800
2 @ 7.5
HMG-15
105
6450
240 x 240
1,280,000
29,800
2 @ 10
240 x 240
1,280,000
29,600
2 @ 10
4
PERFORMANCE TABLES
HMS & HMG UNIT HEATERS
HMS & HMG UNIT HEATERS
SOUND POWER LEVELS -
dbA
Note: These sound levels are based on the following assumptions:
1)
Backward inclined fan(s)
2)
Source of noise at recommended mounting height. Microphone 5' from floor.
3)
Greatest noise would be directly under the heater.
4)
Sound absorption coefficients: Floor - 0.01, Walls - 0.10, Ceiling (with fiberglass) - 0.20.
5)
No background noise.
Notes:
1.
Based on a two row, 5 FPI coil and 5 PSIG steam pressure at the coil.
2.
For higher steam pressures, the surface area will be reduced to produce same performance.
Notes:
1.
Based on a two row, 8 FPI coil and 200
° EWT at the coil with 20° drop. See table on next page for performance with other conditions.
2.
For higher water temperatures, the surface area will be reduced to produce same performance. 5
60
°
Design Space
70
°
Design Space
Temperature
Temperature
Unit Size
GPM
P.D.
GPM
P.D.
HMS-10
135.8
3.5
122.4
2.9
HMS-15
143.2
3.8
129.0
3.2
HMS-20
150.0
4.2
135.0
3.5
HMS-30
153.6
4.4
139.2
3.6
HMS HOT WATER CORRECTION FACTORS
BASE WATER FLOW RATES AND WATER PRESSURE DROP
Notes:
1.
Base flow rate based on capacities shown on previous page with 200
° EWT at the coil with 20° drop.
% Base Water
Air Temperature Rise
Water Pressure Drop
Flow Rate
Correction Factor
Correction Factor
200
1.07
3.49
175
1.06
2.74
150
1.05
2.08
125
1.03
1.49
100
1.00
1.00
75
0.96
0.59
50
0.88
0.29
PERFORMANCE FACTORS FOR CONDITIONS
OTHER THAN BASE WATER FLOW RATE
PERFORMANCE FACTORS FOR CONDITIONS
OTHER THAN 60
° EAT AND 200° EWT
Entering
Entering Air Temperature (
°
F)
Water
Temperature (
°
F)
40
50
60
70
80
90
100
160
0.85
0.78
0.71
0.64
0.57
0.50
0.42
170
0.92
0.85
0.78
0.71
0.64
0.57
0.50
180
0.99
0.92
0.85
0.78
0.71
0.64
0.57
190
1.07
1.00
0.93
0.86
0.78
0.71
0.64
200
1.14
1.07
1.00
0.93
0.86
0.79
0.71 6
DIMENSIONS
HMS UNITS WITH STEAM OR HOT WATER COILS
Typical Wiring Diagram - Make-Up Air Unit
C000589 7
DIMENSIONS
HMG UNITS WITH GAS FURNACES
Typical Wiring Diagram - Make-Up Air Unit
C000590 8
HMS & HMG DISCHARGES
DIMENSIONS
Typical Wiring Diagram - Make-Up Air Unit
C000591 9
DISCHARGES
Heater Size
HMS-10
HMS-15
HMS-20
HMS-30
Mounting
75
85
95
115
Height
Coverage
160 x 160
180 x 180
210 x 210
240 x 240
Revolving
Heater Size
HMG-5
HMG-7
HMG-10
HMG-15
Mounting
75
85
95
105
Height
Coverage
160 x 160
180 x 180
210 x 210
240 x 240
Revolving
Design No. 10R
Single Outlet
Design No. 8R
Two Outlet
HMS & HMG MOUNTING HEIGHTS AND COVERAGES
Heater Size
HMS-10
HMS-15
Mounting
75
85
Height
Coverage
150 x 150
160 x 160
Revolving
Heater Size
HMG-5
HMG-7
Mounting
75
85
Height
Coverage
150 x 150
160 x 160
Revolving SELECTION GUIDE
10
Truss thermostats are used to control the discharge air
temperature of gas heaters by turning on or off individual
furnaces based on inlet air temperatures.
A truss thermostat is mounted and wired on the inlet duct. It
has a bulb type sensor that is fixed to the outside of the unit.
In this manner, high temperature air stratified in the truss
can be redistributed to the working levels when the need for
it exists - without burner operation. Process heat, normally
wasted, can be economically put to use.
Also, discharge temperatures can be effectively maintained to
assure optimum projection. Elevated truss temperatures will
increase discharge temperatures. Extremely high tempera-
ture air is light weight therefore difficult to project from high
mounting heights.
ENERGY SAVING TRUSS THERMOSTATS HMG Units
Here is a typical four truss thermostat set up:
With the room thermostat calling for heat, a four burner unit
operates as follows:
E.A.T.
Discharge Temp.
Burners On
70
°F
121
°F
All(4)
83
°F
121
°F
3
96
°F
121
°F
2
109
°F
121
°F
1
121
°F
121
°F
None
Note: Temperature rise through the unit is 51
°F.
To apply Wing High Mounted Heaters for aircraft hangers
and very large buildings it is most desirable to have a
heating system with a rapid recovery rate since the
opening of the large hanger doors in cold weather cause a
rapid draining of heat from the building.
While todays building designs and improved insulating
materials have reduced BTUH requirements, the first step
in selection process should be the building Heat Loss
Calculation, using ASHRAE Fundamental Guide or other
methods available.
The next step is to look at individual unit heating capacities
and published