Dual Pneumatic
I n s t a l l a t i o n , O p e r a t i o n & S e r v i c e M a n u a l
10
www.trioniaq.com
Loss of Water Pressure Due to Friction
in psi per 100 ft. of Type “K” copper tube at 60 PSIG
Flow Gals.
per Min.
Pipe Size
1/2”
3/4”
1”
1 1/4” 1 1/2”
2”
1
1.30
0.25
0.05
-
-
-
2
4.50
0.85
0.23
0.07
-
-
3
9.00
1.70
0.45
0.15
0.063
-
4
15.00
2.80
0.75
0.25
0.10
-
5
22.00
4.20
1.10
0.36
0.16
0.042
6
31.00
5.80
1.50
0.50
0.22
0.058
7
40.00
7.50
2.00
0.65
0.28
0.073
For longer or shorter lengths of pipe,the friction loss is
proportional to the length.
Example: AIR LINE 500 ft. One half of the above
4,000 ft. Four times the above
WATER LINE 50 ft. One half the above
400 ft. Four times the above
5. Follow start-up procedure EXACTLY. Repeat the start-up
procedure every time the system is drained or cleaned.
V. START-UP PROCEDURES
1. CHECK INSTALLATION WITH THE LAYOUT
DRAWING.
Be sure that the equipment has been
installed exactly as laid out on the system drawing
- location of head assemblies, control sections,
humidistats, etc. and that the proper size pipe has
been used on all air and water supply lines as well as
drain lines. (Frictional losses and pressure drops were
considered in making the layout.)
2. CLOSE ALL AIR AND WATER VALVES AT EACH
HEAD ASSEMBLY.
It is vitally important that no foreign
matter in the supply lines - air and water - gets into the
heads.
3. CLEAN MAIN SUPPLY LINES TO CONTROL
SECTIONS.
Close air and water valves on the incoming
side of all control sections. Start the air compressor.
Open the main valves at the air compressor and water
source. Break the unions just ahead of the incoming air
and water pressure gauges of the control sections. AIR
MAIN LINE: Put on safety glasses. Place a cloth over the
open air line to catch any flying debris. Place a bucket
over the end of the air line. Slowly open the valve and
let the air line blow until clean. DO NOT LOOK INTO
THE BUCKET WHILE THE AIR IS BLOWING. Close the
valve and retighten the union securely. WATER MAIN
LINE: Repeat the above procedure for the water line.
Clean lines to all control sections as described above.
4. CHECK ELECTRICAL WIRING OF CONTROLS.
Set
the SAFETY humidistat to maximum. Set the CONTROL
humidistat to 20%. NOTE: If only one humidistat is used,
set to 20% or switch it to OFF. Open air valve ONLY to
feed air to control section. Do NOT open water valve.
to properly sense the relative humidity of the surrounding air.
(See Wiring Diagram on page 17.)
Other Considerations
1. Air must be free of oil and water. It is wise to place filters
on both the air and water feed lines ahead of the control
sections. TRION recommends the use of a moisture
separator and trap and a coalescing filter on the air line.
2. To prevent condensation on uncovered cold water pipes
in the system, it is advisable to consider using aftercooler
water from the air compressor in the humidification
system. If this is not practical, a heater for the system’s
water supply may be used.
3. If the water supply pressure fluctuates and doesn’t
maintain 50 psi at the highest level of a head assembly,
it will be necessary to supply a water pressure booster
pump or bladder tank for the system. Consult TRION for
assistance in sizing pump and tank.
4. With extremely large systems, supply piping should be
sized as follows:
System Cap. - Water MIN. Water System Req. - Air
Min. Air
Up to 1,000 lbs/hr
1/2”
10 - 24 CFM
3/4”
1,000 to 2,000 lbs/hr
3/4”
24 - 45 CFM
1”
2,000 - 3,000 lbs/hr
1”
45 - 70 CFM
1 1/4”
Over 3,000 lbs/hr
1 1/4”
70 - 100 CFM
1 1/2”
Supply piping should be sized to control sections so as to
minimize pressure drop in accordance with table below.
Cu. Ft. Free
Air per Min.
Pipe Size
1/2”
3/4”
1”
1 1/4” 1 1/2”
2”
10
6.50
0.99
0.28
-
-
-
20
23.90
3.90
1.31
0.25
0.11
-
30
58.50
9.01
2.51
0.57
0.26
-
40
-
16.00
4.45
1.03
0.46
-
50
-
25.10
6.96
1.61
0.71
0.19
60
-
36.20
10.00
2.32
1.02
0.28
70
-
49.30
13.70
3.16
1.40
0.37
80
-
64.50
17.80
4.14
1.83
0.49
90
-
82.80
22.00
5.23
2.32
0.62
100
-
-
27.90
6.47
2.86
0.77
125
-
-
48.60
10.20
4.49
1.19
150
-
-
62.80
14.20
6.43
1.72
175
-
-
-
19.80
8.72
2.38
200
-
-
-
25.80
11.40
3.06
250
-
-
-
40.40
17.90
4.78
300
-
-
-
58.20
25.80
6.85
350
-
-
-
-
35.10
9.36
400
-
-
-
-
45.80
12.10
450
-
-
-
-
58.00
15.40
500
-
-
-
-
71.60
19.20
Loss of Air Pressure Due to Friction
in psi per 1000 ft of pipe at 100 PSIG
