Daikin SWP Series Installation Manual page 38

Figure 27: Wheel-to-Inlet Funnel Relationship—40 to 60
Plenum Fans
Cross Section Reference
FUNNEL END TO FAN
WHEEL OPENING
B
C
Figure 28: Wheel-to-Inlet Funnel Relationship—40 to 60
Plenum Fan
Wheel-Funnel Parameters
Size A
40 0 .82
44 0 .91
49 1 .00
54 1 .10
60 1 .23
IM 1032-2 • Self-Contained Air Conditioning System
A
EQUALLY
SPACED AROUND
DIAMETER
B C
2 .00 4 .88
2 .25 5 .50
2 .50 5 .50
2 .50 5 .50
3 .00 5 .50
Setscrews on MPQ fan wheels must be installed using a
calibrated torque wrench to the value listed below, ±5% .The
fasteners must be periodically checked to satisfy agency
requirements for components on rotating machinery .
Table 15: Setscrew Torque Specifications—Belt Drive
Plenum Fans Only
Fan Size Setscrew Size
13 3/8
15 3/8
16 3/8
18 3/8
20 3/8
22 3/8
24 3/8
27 3/8
30 1/2
33 1/2
36 1/2
40 1/2
44 1/2
49 1/2
54 1/2
60 3/4
Drive Sheave Alignment
Check the drive sheave alignment using the four-point method
shown in Figure 29 . When measuring from the straight edge to
the belt, the distance at points A, B, C, and D must be equal for
correct alignment .
Figure 29: Sheave Alignment
A B
RPM Changes
All units are provided with fixed pitch sheaves selected for the
specified operating conditions. If a new fan rpm selection is
required, field install a new sheave selection. Adjust the belt
tension as described below .
38
s C , T ,
ysTem heCk esT and
Torque (ft .-lb)
Aluminum Steel
19 .2
19 .2
19 .2
19 .2
19 .2
19 .2
19 .2
19 .2
41 .7
41 .7
41 .7
41 .7
41 .7
41 .7
41 .7
115
Field Supplied Straightedge
C
www .DaikinApplied .com
s
TarT
N/A
N/A
N/A
N/A
N/A
N/A
N/A
22
55
55
55
55
55
55
55
150
D