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Performance
Data
UNT-PRC001-EN 67
Basic Series
Sizes 04-08
ARI cooling performance is based on 80/67 F (27/19 C) entering air temperature, 45 F (7 C) entering chilled water temperature
with a 10 F (5.5 C) ∆T. Heating performance is based on 70 F (21 C) entering air temperature, 180 F (82 C) entering hot water
temperature with a 30 F (17 C) ∆T. All performance measured on high speed tap, free discharge motor at zero ESP, high static
motor at 0.2 ESP, with throwaway filter, and is valid for all voltages except 208.
Table B-PD-1. Free Discharge Motor, Two-Pipe
Cooling Heating
CFM TMBH SMBH GPM WPD TMBH GPM WPD 115V 230V 277V
FC Coil (L/s) (TkW) (SkW) (L/s) (kPa) (TkW) Q/ITD (L/s) (kPa) Watt Watt Watt
4 3CH 374 (177) 11.5 (3.4) 8.1 (2.4) 2.37 (.15) 9.5 (28.3) 31.8 (9.3) 0.29 2.12 (.13) 6.4 (19.0) 100 107 106
4CH 350 (165) 13.0 (3.8) 8.7 (2.5) 2.66 (.17) 14.8 (44.4) 34.2 (10.0) 0.31 2.28 (.14) 9.1 (27.3) 100 107 106
6 3CH 608 (287) 16.6 (4.9) 12.4 (3.6) 3.40 (.21) 4.9 (14.8) 49.7 (14.6) 0.45 3.31 (.21) 4.2 (12.6) 125 130 124
4CH 565 (267) 19.4 (5.7) 13.3 (3.9) 3.96 (.25) 7.8 (23.2) 53.8 (15.8) 0.49 3.59 (.23) 5.7 (17.0) 125 130 124
8 3CH 731 (345) 20.6 (6.1) 14.7 (4.3) 4.21 (.27) 8.2 (24.4) 61.6 (18.1) 0.56 4.11 (.26) 6.9 (20.7) 120 123 133
4CH 688 (325) 22.8 (6.7) 15.5 (4.5) 4.65 (.29) 11.7 (35.0) 66.8 (19.6) 0.61 4.45 (.28) 9.4 (28.1) 120 123 133
Table B-PD-2. High Static Motor, Two-Pipe
Cooling Heating
CFM TMBH SMBH GPM WPD TMBH GPM WPD 115V 230V 277V
FC Coil (L/s) (TkW) (SkW) (L/s) (kPa) (TkW) Q/ITD (L/s) (kPa) Watt Watt Watt
4 3CH 484 (228) 14.0 (4.1) 10.2 (3.0) 2.94 (0.19) 13.9 (41.5) 38.6 (11.3) .35 2.57 (0.16) 9.1 (27.0) 210 210 210
4CH 453 (214) 16.0 (4.7) 11.0 (3.2) 3.35 (0.21) 22.3 (66.7) 42.2 (12.4) .38 2.81 (0.18) 13.4 (39.9) 210 210 210
6 3CH 780 (368) 20.1 (5.9) 15.5 (4.5) 4.24 (0.27) 7.5 (22.3) 59.5 (17.4) .54 3.96 (0.25) 5.9 (17.7) 320 320 320
4CH 725 (342) 23.9 (7.0) 16.8 (4.9) 4.99 (0.31) 11.9 (35.6) 65.6 (19.2) .60 4.37 (0.28) 8.2 (24.6) 320 320 320
8 3CH 886 (418) 24.6 (7.2) 17.9 (5.3) 5.13 (0.32) 11.8 (35.2) 71.2 (20.9) .65 4.74 (0.30) 9.1 (27.1) 320 320 320
4CH 835 (394) 27.3 (8.0) 18.9 (5.5) 5.68 (0.36) 16.9 (50.6) 78.3 (22.9) .71 5.22 (0.33) 12.7 (37.8) 320 320 320
Note:
1. CFM = Cubic feet per minute
2. TMBH = Total capacity (MBH)
3. GPM =Gallons per minute
4. WPD = Water pressure drop (feet of water)
5. Q/ITD = MBH (kW)/(entering water temperature - entering air temperature) when ∆T and GPM (L/s) remain constant. To determine heating capacities at a different entering water
temperature or entering air temp, compute the new ITD and multiply it by the Q/ITD shown.
6. Medium and low speed capacities are approximately 80% and 60% respectively of the high speed capacity.