Air Specialties Softaire RERV-80, Руководство по эксплуатации

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P" CFM
0.064 140
0.071 150
0.078 160
DUCT DIA
.
5"
CROSS SECTION AREA
0.136 sq. ft.
The accuracy of the flow reading will be affected by how close to any elbows or bends the readings are taken.
Accuracy can be increased by taking an average of multiple readings as outlined in the literature of the Pitot tube.
MAGNEH
ELIC
0
.1
.2 .3 .4
.5
MAGNEH ELIC
0
.1
.2 .3 .4
.5
Magnehelic
gauge
Pitot
tube
Pitot tube
Min 3 ft straight duct
(option #1)
Min 3 ft straight duct
MAGNEHELIC
0
.1 .2
.3 .4
.5
(option #2)
Note: To take more accurate readings, use option #1(if possible).
(Option #2)
- Remove plug from #2 and #4 locations as
shown for balancing
- Do not use pitot tube to open holes in the
insulation as it may block/damage the pitot tube.
- Take 3-4 readings on each hole and average
for supply side and same for exhaust.
- After finish balancing, plug both two holes back
to avoid air leakage and whistling noise from
the holes.
CFM = Opening / Cross-sectional Area(sq.ft.) x velocity(FPM)
Ø5
0.010 50
0.012 60
0.016 70
0.022 80
0.027 90
0.034 100
0.041 110
0.048 120
0.057 130
P" CFM
P" = Velocity Pressure in inch
#2 #2
#3 #3
MAGNEHELIC
0
.1 .2
.3 .4
.5
Remove plug
while balancing
Remove plug
while balancing
#1
#4
11
Plugs
Pitot Tube Air Flow Balancing (cont’d)
Field Air flow Balancing (Method 2):
Balancing Table
Differen al
Pressure
the Core
Supply Air
Exhaust Air
In.W.C.
Pa CFM
L/s
CFM L/s
0.03 8 28 13 32 15
0.06 15 38 18 44 21
0.09 22 50 24 62 29
0.105
26
56 26 74 35
0.12 30 62 29 81 38
0.135 34 72 34 87 41
0.15
37
81 38 91 43
0.165
41
87 41 95 45
0.18 45 92 43 98 46
0.195
49
95 45 105 49
0.21 52 98 46 115 54
0.24 60 118 56 128 60
0.27 67 133 63 142 67
0.30
74
151 71 156 74
0.33
82
158 75 163 77
Across
0.36 89 163 77
171
80
NOTE: Make sure to plug
back all holes after
balancing.
Drain +
+
- -
Stale Air
From Outside
To Outside
Stale Air
From Home
To Home
Fresh Air
Manometer
Supply
(Low)
Exhaust
(Low)
Exhaust
(High)
Supply
(High)
Fresh Air
MAGNEH
ELIC
0
.1
.2
.3 .4
.5
#2
#3
MAGNEHELIC
0
.1 .2
.3 .4
.5
#1
#4
Core/Heat
Exchanger