Trane Performance Climate Changer UCCA Series - Determine Fan Speed

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CLCH-SVX009L-EN 63
Determine Fan Speed
Fan speed can be determined using a strobe-type tachometer,
or revolution counter.
Check unit vibration if the fan speed is changed more than
five percent from the original designed speed, or if parts such
as shafts, fan wheels, bearings, or other drive components are
replaced. Do not exceed the maximum fan speed.
Pay particular attention to any vibration, noise, or overheating
of the motor and fan bearings; however, note that bearings
may run warm during break in.
Table 16. Typical sheave diameter and deflection force
Cross section
Smallest sheave
diameter range (in.) Speed (rpm) range
Belt Deflection Force (lbs)
Super gripbelts and unnotched gripbands Gripnotch belts and notched gripbands
Used belt New belt Used belt New belt
A, AX
3.0–3.6
1,000–2,500 3.7 5.5 4.1 6.4
2,501–4,000 2.8 4.2 3.4 5.0
3.8–4.8
1,000–2,500 4.5 6.8 5.0 7.4
2,501–4,000 3.8 5.7 4.3 6.4
5.0–7.0
1,000–2,500 5.4 8.0 5.7 9.4
2,501–4,000 4.7 7.0 5.1 7.6
B, BX
3.4–4.2
860–2,500 n/a n/a 4.9 7.2
2,501–4,000 n/a n/a 4.2 6.2
4.4–5.6
860–2,500 5.3 7.9 7.1 10.5
2,501–4,000 4.5 6.7 7.1 9.1
5.8–8.6
860–2,500 6.3 9.4 8.5 12.6
2,501–4,000 6.0 8.9 7.3 10.9
C, CX
7.0–9.0
500–1,740 11.5 17.0 14.7 21.8
1,741–3,000 9.4 13.8 11.9 17.5
9.5–16.0
500–1,740 14.1 21.0 15.9 23.5
1,741–3,000 12.5 18.5 14.6 21.6
D
12.0–16.0
200–850 24.9 37.0 n/a n/a
851–1,500 21.2 31.3 n/a n/a
18.0–20.0
200–850 30.4 45.2 n/a n/a
851–1,500 25.6 38.0 n/a n/a
3V, 3VX
2.2–2.4
1,000–2,500 n/a n/a 3.3 4.9
2,501–4,000 n/a n/a 2.9 4.3
2.65–3.65
1,000–2,500 3.6 5.1 4.2 6.2
2,501–4,000 3.0 4.4 3.8 5.6
4.12–6.90
1,000–2,500 4.9 7.3 5.3 7.9
2,501–4,000 4.4 6.6 4.9 7.3
5V, 5VX
4.4–6.7
500–1,749 n/a n/a 10.2 15.2
1,750–3,000 n/a n/a 8.8 13.2
3,001–4,000 n/a n/a 5.6 8.5
7.1–10.9
500–1,749 12.7 18.9 14.8 22.1
1,750–3,000 11.2 16.7 13.7 20.1
11.8–16.0
500–1,749 15.5 23.4 17.1 25.5
1,750–3,000 14.6 21.8 16.8 25.0
8V
12.5–17.0
200–850 33.0 49.3 n/a n/a
851–1,500 26.8 39.9 n/a n/a
18.0–22.4
200–850 39.6 59.2 n/a n/a
851–1,500 35.3 52.7 n/a n/a
WARNING
Live Electrical Components!
Failure to follow all safety precautions when exposed to
rotating components could result in death or serious
injury. During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
measure the speed of rotating components. Have a
qualified licensed service individual who has been
properly trained in handling exposed rotating
components perform these tasks.