Trane Performance Air Handlers Manual de Instalação descarregar pdf (Página 79)

100

CAH-SVX01B-EN 79

Start-Up

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 3. 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

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

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

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