85
RTAA-IOM-3
Figure 45
Fan Configurations – RTAA 130-200 Tons
15 F Minimum Ambient
All fans will be Full Airflow (Full Pitch Blade) Fans:
Circuit #1 is on the right side of the unit from the control panel.
Circuit #2 is on the left side of the unit from the control panel.
# Of Fans # Of Fans UCM Outputs
Tons Circuit #1 Circuit #2 Per Circuit # Fan Steps/Circuit
130 5 5 4 5 & 5 respectively
140 5 5 4 5 & 5 respectively
155 6 5 4 6 & 5 respectively
170 7 5 4 7 & 5 respectively
185 7 6 4 7 & 6 respectively
200 7 7 4 7 & 7 respectively
For STANDARD air-cooled (RTAA) Chillers, the mapping of UCM outputs to fan staging shall be as follows:
Fan Contactor 5 Fan Circuit 6 Fan Circuit 7 Fan Circuit
Circuit #1 K9 K10 K11 K12 K9 K10 K11 K12 K9 K10 K11 K12
Circuit #2 K13 K14 K15 K16 K13 K14 K15 K16 K13 K14 K15 K16
Number of Fan(s)/
Contactor 1112 11 22 1123
Fan Steps
0 –––– –– –– ––––
1 x––– x– –– x–––
2 xx–– x x –– xx––
3 xxx– x– x– x–x–
4 xx– x xx x– xx–x
5 xxx x x– xx x x– x
6 –––– xx xx x–xx
7 –––– –– –– xxxx
X = ON
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