Daikin UATC10AMY1 [38/43] Cmm cfm
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Daikin UATC10AMY1 [38/43] Cmm cfm

Daikin UATC10AMY1 [38/43] Cmm cfm
3
1
12
• Rooftops • Cooling only
34
• Cooling only • R-22 • UAT-AMY1
12 Fan characteristics
Selection Process
Drive Package
The following are the design requirements for UAT280AY1 unit:
Model: UAT280AY1
Supply Air Quantity = 3800 CFM
External Static Pressure = 150 Pa
Step 1: From the blower curve (at 8000 CFM),
Standard operating system;
Internal Static pressure = 150 Pa
Step 2: Therefore at 3800 CFM and 150 Pa external static pressure,
Total Static Pressure = 150 + 150 Pa
= 300 Pa
Step 3: From the blower curve, the design requirement calls for RPM about 1200 RPM.
From the table:
Motor pulley = 114 mm
Blower pulley = 152 mm
Motor RPM = 1080
In order to obtain 1200 RPM, we calculate the new blower pulley as:
(while maintaining the motor pulley)
Db = 114 x (1080/1200)
=102.6mm
Let us take close approximation of 100 mm diameter pulley size
Recheck, with Db = 100mm
Blow pulley = 1080 x (114/100)
= 1231.2 RPM
We thus need to change the blower bulley from 152 mm to 100 mm in order to obtain the higher operating static pressure.
Step 4: When the pulley is changed, the V-belt length must be rechecked. We have for horizontal air throw configuration:
V-belt length, L = 2C + 1.57 (Db + Dm)
= (2 x 184) + 1.57(114 + 100)
= 703.98
We thus can use a belt with a length of 704 mm.
where, C = distance between the centres of the two pulleys
Db = diameter of blower pulley
Dm = diameter of motor pulley
Step 5: From the blower curve, we can also notice that the motor power input has maintained within the current operating range of the
standard unit’s motor.
Summary:
i) Fan motor kW = 1.5 kW
ii) Blower pulley diameter = 100 mm
iii) V-belt size = 704 mm
The following table summarizes the pulley data, motor size used for the UATP-series, as manufactured:
Model
Blower pulley, Db Motor Pulley, Dm
Diameter (mm) Bore (mm) Type Diameter (mm) Bore (mm)Type
UAT180A1 B1 152 20 B1 102 19
UAT240A1 B1 152 20 B1 102 24
UAT280A1 B1 152 20 B1 114 24
UAT320A1 B1 140 20 B1 114 24
UAT450A1 B2 254 28 B2 127 28
UAT560A1 B2 254 28 B2 152 28
UAT700A1 SPZ 2 224 25 SPZ 2 125 38
UAT850A1 SPZ 2 224 25 SPZ 2 140 38
UATC10AY1 SPA 280 40 SPA 124 38
UATC12AY1 SPA 250 40 SPA 118 38
Model
V-belt length, L
(mm)
Pulley Centre Distance, C (mm)
Motor kW Motor RPM
Diameter (mm) Minimum Maximum
UAT180A1 762 180
126 224
0.75 960
UAT240A1 762 180 1.1 960
UAT280A1 787 184 1.5 1080
UAT320A1 762 180 1.5 1100
UAT450A1 1067 225
190 306
2.2 730
UAT560A1 1092 221 3.7 850
UAT700A1 1662 558
558 572
5.5 840
UAT850A1 1700 565 7.5 880
UATC10AY1 2132 748
730 763
7.5 1440
UATC12AY1 2060 739 7.5 1440
UAT280AY1
Standard Point
Internal Static Pressure
700
600
500
400
300
200
150
100
1700
1600
1500
1400
1300
1200
1100
1000
900
800
90
3180
95
100
3530
105
3800
110
3880
115
120
4240
(CMM)
(CFM)
2,2 KW
1,5 KW
(Pa) (rpm)
PULLEY OUTSIDE DIMENSIONS ARE SHOWN BELOW: (UNIT : MM)
(1) Shape Of Belt Groove
1.1
Sectional plan of V-belt
1.2 Taper lock type UAT700/850AY1
Sectioned plan of V-blet
(2) Shape Of Motor Pulley Boss (unit:mm)
Shape
of V-belt
Nominal Dia.
ØP.C
a (°) W Lo K Ko e f r
1
r
2
r
3
V-belt
thickness
(Reference)
B
Over 125
Under 160
34 15.86
12.5 5.5 9.5 19.0 12.5 0.2~0.5 0.5~1.0 1~2 11
Over 160
Under 200
36 16.07
Over 200 38 16.29
Section
Sheave dia.
d
d
Groove
angle
ß
W
d
b
min
h
min
ef
SPZ
71 - 80
> 80
34°
38°
8.5 2.0 9.0 12 ± 0.3 8 ± 1
MOTOR
CAPACITY (kW)
ABC
1.1, 1.5
Ø24
+0.028
27
+0.128
8
+0.018
+0.007 +0.007 -0.018
2.2, 3.7
Ø28
+0.028
31
+0.128
8
+0.028
+0.007 +0.007 -0.013
5.5, 7.5
Ø38
+0.028
41
+0.128
10
+0.028
+0.007 +0.009 -0.013
8mm
10mm
B-type
UAT180AY1
Air flow
(Pa) (rpm)
Fan Performance Curve
(CMM
)
(CFM)
Standard point
1.1KW
Internal Static Pressure
0.55KW
0.75KW
T
o
t
a
l
s
t
a
ti
c pressure

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