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Calculator
V
DC
1500
1625
1750
1875
2000
2125
2250
2375
2500
Field Accessories:
Economizer
Fig. 58 — Example of Fan Speed Set Up Labels for Electro-Mechanical Controls
UNITS WITH SYSTEMVU™ CONTROLS
On units equipped with the factory-installed SystemVu
controller the Fan Speed settings are accessed through the
SystemVu interface.
1.
Check the job specifications for the CFM (cubic feet per
minute) and ESP (external static pressure) required.
2.
Using the chart on the Fan Speed Set Up labels (see
Fig. 59), calculate the RPM from the CFM and ESP for
the base unit plus any field accessories (as listed on the
label).
NOTE: The Fan Speed Set Up labels are located on the High
Voltage cover in the Control Box.
3.
Press any key on the SystemVu interface to activate the
display backlight and then press the MENU key.
4.
Using the UP and DOWN arrow keys highlight SET-
TINGS and then press ENTER.
5.
Use the DOWN arrow key highlight the UNIT CONFIG-
URATIONS menu then press ENTER.
ESP in. wg
0.2
0.4
0.6
0.8
1.0
6.0
6.7
7.4
8.0
8.5
6.3
7.1
7.7
8.3
8.8
6.7
7.4
8.0
8.6
9.1
7.1
7.7
8.3
8.9
9.4
7.5
8.1
8.7
9.2
9.7
7.9
8.4
9.0
9.5
8.3
8.8
9.4
9.9
8.7
9.2
9.7
9.1
9.5
0.1
0.1
0.1
0.1
0.1
1.2
1.4
1.6
1.8
2.0
9.0
9.5
9.9
9.3
9.7
9.5
10.0
9.8
0.1
0.1
0.1
6.
Highlight UNIT CONFIGURATIONS then press
ENTER.
7.
Highlight INDOOR FAN and then press ENTER.
8.
Refer to the job specifications to set the following, deter-
mining the values per the RPM Calculator label (see
Fig. 59). Use the UP and DOWN arrow keys and the
BACK key to set the values. Press ENTER after setting
each value to continue to the next selection.
•
IDF VENT SPD
•
IDF HEAT SPD
•
IDF LOW COOL SPD
•
IDF HIGH SPD
•
IDF FREE COOL SPD
For further details see the FC/GC Series Single Package
Rooftop Units with SystemVu Controller Controls, Start-up,
Operation and Troubleshooting manual.
44
Factory Setting:
7.8 V
DC
Field Setting:
Record field setting here
V
DC
Switch Range:
*
C
B
A
4.1 - 7.5
A
6.9 - 8.7
B
7.7 - 10.0
C
* Overlap in A, B, C switch range
designed for maximum field
adjustment potential. For example
7.2 can be set at either A or B.
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