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Calculator
V
DC
1500
1625
1750
1875
2000
2125
2250
2375
2500
Field Accessories:
Economizer
1 Stage E Heat
2 Stage E Heat
NOTE: Values in the Field Accessories section are VDC adders.
Fig. 57 — 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 inter-
face.
1.
Check the job specifications for the CFM (cubic feet per min-
ute) and ESP (external static pressure) required.
2.
Using the chart on the Fan Speed Set Up labels (see Fig. 58),
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 Volt-
age cover in the Control Box.
3.
Press any key on the SystemVu interface to activate the dis-
play backlight and then press the MENU key.
4.
Using the UP and DOWN arrow keys highlight SETTINGS
and then press ENTER.
5.
Use the DOWN arrow key highlight the UNIT CONFIGU-
RATIONS menu then press ENTER.
ESP in. wg
0.4
0.6
0.8
1.0
0.2
5.4
6.2
6.9
7.5
8.1
5.8
6.5
7.1
7.7
8.3
6.1
6.8
7.4
8.0
8.5
6.5
7.1
7.7
8.2
8.7
6.8
7.4
7.9
8.5
9.0
7.2
7.7
8.2
8.7
9.2
7.6
8.0
8.5
9.0
9.5
8.4
8.8
9.3
9.8
7.9
8.3
8.7
9.2
9.6
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.3
0.3
0.3
0.3
0.3
1.2
1.4
1.6
1.8
2.0
8.6
9.1
9.6
8.8
9.3
9.8
9.0
9.5
9.9
9.2
9.7
9.5
9.9
9.7
10.0
0.1
0.1
0.1
0.2
0.2
0.2
0.3
0.3
0.3
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, determin-
ing the values per the RPM Calculator label (see Fig. 58). 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 FCQ/GCQ Series Single Package Roof-
top Units with SystemVu Controller Controls, Start-up, Operation
and Troubleshooting manual.
47
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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