Variable Air Volume (Vav) Start Up; Fan Wheel Alignment - Daikin SWP Series Installation Manual

Figure 25: Water and Refrigerant Piping Schematic
ISOLATION
RELIEF
VALVE
VALVE
CONDENSER
SUCTION
DISCHARGE
VALVE
VALVE
COMPRESSOR NO. 1
ISOLATION
RELIEF
VALVE
VALVE
CONDENSER
DISCHARGE SUCTION
VALVE
VALVE
COMPRESSOR NO. .2
ISOLATION
RELIEF
VALVE
VALVE
CONDENSER
SUCTION
DISCHARGE
VALVE
VALVE
COMPRESSOR NO. 3
ISOLATION
RELIEF
VALVE
VALVE
CONDENSER
SUCTION
DISCHARGE
VALVE
VALVE
COMPRESSOR NO. 4
LOW
WATER FLOW SWITCH
HIGH
E.S.
WATER
COIL
12'
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SIGHT
FILTER
ISOLATION
GLASS
DRIER
VALVE
EQUALIZER
CAPILLARY
EVAPORATOR
EXPANSION
A- A
VALVE
SIGHT
FILTER
ISOLATION
GLASS
DRIER
VALVE
EQUALIZER
CAPILLARY
EVAPORATOR
A- A EXPANSION
VALVE
SIGHT
FILTER
ISOLATION
GLASS
DRIER
VALVE
EQUALIZER
CAPILLARY
EVAPORATOR
EXPANSION
A- A
VALVE
SIGHT
FILTER
ISOLATION
GLASS
DRIER
VALVE
EQUALIZER
CAPILLARY
EVAPORATOR
A- A EXPANSION
VALVE
CONDENSER
WATER
BYPASS WATER SENSORS
VALVE
CONDENSER
WATER
MODERATING
VALVE
SUCTION
LINE
CAPILLARY
EXPANSION
30°
SECTION A - A
Variable Air Volume (VAV)
Start Up
Enter the duct static pressure set point value and parameters
through the keypad:
Supply Fan Speed Menu
• SAF Spd Control
– DuctSPs Spt
Variable air volume, ranging from minimum to maximum, is
obtained by using a variable frequency drive (VFD) . The VFD
can increase the fan speed from 0 rpm to the fan's maximum
r .p .m . to provide 100% air volume . The VFD will use a
frequency (0–60 Hz) to control the fan r .p .m .
The VFD is controlled by the MCB and may have a manual
bypass .

Fan Wheel Alignment

Figure 26: Wheel-to-Inlet Funnel Relationship—13 to 36
Plenum Fans
Cross Section Reference
OUT
IN
FROM FUNNEL END TO
FANWHEEL OPENING END
C
VALVE
BULB
Table 14: Wheel-to-Inlet Funnel Relationship—13 to 36
Plenum Fan
Size
13
15
16
18
20
22
24
27
30
33
36
37 IM 1032-2 • Self-Contained Air Conditioning Systems
s C , T
ysTem heCk esT
EQUALLY SPACED
AROUND DIAMETER
B
A
Wheel-Funnel Parameters
A B
0 .25 0 .91
0 .25 0 .91
0 .25 0 .91
0 .38 0 .86
0 .42 1 .11
0 .45 1 .11
0 .51 1 .11
0 .55 1 .36
0 .62 1 .36
0 .55 1 .50
0 .63 1 .50
, s
and TarT
C
3 .50
3 .50
3 .50
3 .88
3 .88
3 .88
3 .88
4 .50
4 .50
5 .00
5 .00