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Manual 2100-642
Page
42 of 82
FIGURE 2.5
Free Cooling Damper Operation
Free cooling can take place providing the outside air meets three (3) separate criteria:
1. The dewpoint must be below 60°F
2. The relative humidity must be below 80%
3. The outside air must be cooler than the current setpoint.
With an accurate psychrometer, it is easy to pinpoint when the damper should be
open or closed during normal operations.
Below 60°F Dewpoint
Below 80% Relative Humidity
Description
Default Setpoint
Temperature at local remote
(main) sensor
--
Temperature Setpoint
77°F
Heating Setpoint
60°F
Temperature High Limit –
Level 1
85°F
Temperature High Limit –
Level 2 (High Temp Alarm)
90°F
Temperature Low Limit
45°F
Cooling Stage Differential
5°F
Heating Stage Differential
2°F
Comfort Mode Setpoint
72°F
Comfort Mode Operation
Time
60 Minutes
Freecooling Setpoint
55°F
Lead/Lag Changeover Time
(Active/Standby Rotation)
1
Temperature Units
°F
TABLE 2.2
Controller Default Settings
Summary of Contents for W48A2PQ
Page 6: ...Manual 2100 642 Page 6 of 82...
Page 7: ...Manual 2100 642 Page 7 of 82 SECTION 1 INSTALLATION INSTRUCTIONS...
Page 35: ...Manual 2100 642 Page 35 of 82 SECTION 2 SERVICE INSTRUCTIONS...
Page 62: ...Manual 2100 642 Page 62 of 82...
Page 63: ...Manual 2100 642 Page 63 of 82 SECTION 3 APPENDIX...