IM708 35
Final control settings
When all of the start-up procedures have been completed, set
the individual control parameters for operation.
1. Unit switch S7 to AUTO.
2. Heating/Cooling control parameters set as required.
3. Alarm limits set as required.
4. Night setback parameters set as required.
5. Duct static pressure, building static pressure, as
required.
6. Economizer control parameters set as required.
7. Control timers set as required.
8. Date and time set as required.
9. Operating schedule set as required.
10. Holiday schedule set as required.
Note: See Operation manual per Table 1 on page 3, for the
keypad menu structure.
Maintaining control parameter records
After the unit has been checked, tested and started and the
final control parameters are set, the final settings should be
recorded and kept on file. This file should be updated when-
ever changes are made to the control parameters. This will
facilitate any required analysis and troubleshooting of the
system operation.
Figure 30. Drive Alignment
Figure 31. Belt Tension
Table 15. Recommended Pounds Force Per Belt
BCD
FIELD SUPPPLIED STRAIGHTEDGE
BELT
SECTION
SMALL SHEAVE
DIA. (IN)
MINIMUM MAXIMUM
A
3.0 - 3.6 3.00 4.25
3.8 - 4.8 3.5 5.00
5.0 - 7.0 4.00 5.50
B
3.4 - 4.2 4.00 5.50
4.4 - 5.6 5.13 7.13
5.8 - 8.6 6.38 8.75
BX
3.4 - 5.6 6.50 9.13
4.4 - 5.6 6.50 9.13
5.8 - 8.6 7.38 10.13
5VX
4.7 - 6.7 10.00 15.00
7.1 - 10.8 12.88 18.75
11.8 - 16.0 15.00 22.00
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