Johnson Controls VFD66 Series, Технический бюллетень продукции, Страница: 8 / 17

8 VFD66 Series Condenser Fan Speed Controls Product/Technical Bulletin
Table 5: Altitude Multipliers for De-Rating
Altitude Range Altitude Multiplier
0-3300 ft (0-1000 m) 1.0
3300-4300 ft (1000-1305 m)
0.97
4300-5300 ft (1305-1610 m) 0.94
5300-6300 ft (1610-1915 m)
0.91
6300-7300 ft (1915-2220 m)
0.88
7300-8300 ft (2220-2525 m) 0.86
8300-9300 ft (2525-2830 m)
0.83
9300-10300 ft (2830-3135 m)
0.80
10300-11300 ft (3135-3440 m) 0.78
De-Rating Examples
For these examples, the control used is a VFD66Exx
type. See Figure 10, Figure 11, and Table 5.
•
If a VFD66Exx type (208/230 VAC) is used and
the temperature is below 122
°
F (50
°
C), the VFD66
control may be used for loads up to 10.6 amperes
at any altitude below 3,300 ft (1,000 m).
•
If the temperature around the VFD66 control
reaches 140
°
F (60
°
C), the rating is different.
According to Figure 10, the VFD66 control is rated
for only 7.5 amperes at 140
°
F (60
°
C).
•
If the VFD66 control is used in Denver, Colorado
(altitude 5200 ft), the output rating is reduced.
(See Table 5.) When the temperature is less than
122
°
F (50
°
C), the VFD66 control is rated for
9.96 amperes, as shown by the equation:
De-Rated Maximum Output Amperes = 10.6 Amperes
x 0.94 = 9.96 Amperes
•
If the VFD66 control is used in Denver, Colorado
(altitude 5200 ft), and the ambient temperature
reaches 140
°
F (60
°
C), then the VFD66 control is
de-rated to a 7.5-ampere maximum current draw
due to the high ambient temperature and is further
de-rated to 7.05 amperes of current draw because
of high altitude.
De-rated Maximum Output Amperes = 7.5 Amperes x
0.94 = 7.05 Amperes
Commissioning
Table 6: Mode Selections According to Input Device
Input Device Input Type Input Mode J2 Jumper
Position J3 Jumper
Position J7 Jumper
Position
1
Any
2
None
2
Manual Installed Installed NA
A350P Temperature Standard Installed Removed Removed
P352PN Pressure Standard Installed Removed Removed
P35AG-9200 Pressure Standard Installed Removed Installed
Any 0-5 VDC Devices Any
3
Standard Installed Removed Installed
Any 0-10 VDC Devices Any
3
Standard Installed Removed Removed
P499 or Other Electronic
Pressure Transducer Pressure Electronic Pressure
Transducer
Removed Removed or
Installed
4
Removed or Installed
4
1. J7 jumper position depends on the input device connected.
2. Setting the input mode to manual ignores any connected input devices.
3. Input type varies with device.
4. Transducer may provide 0-5 VDC or 0-10 VDC signal. A 0-10 VDC transducer must be separately powered. Note that
a non-ratiometric transducer generates more error than ratiometric transducers.