QUANTECH
FORM QWC3-EG1 (217)
18
GUIDE TO SELECTION
Complete water chilling capacity ratings for QWC3 chillers are shown on the following
pages to cover the majority of job requirements. For any application beyond the scope of
this Engineering Guide, consult your nearest Quantech Sales Representative.
Selection Rules
1.
Ratings
– All QWC3 ratings are in accordance with AHRI Standard 550/590, at the
AHRI standard condi tions. Ratings not at standard AHRI conditions are rated in accor-
dance with AHRI rating procedures. These ratings may be interpolated but should not
be extrapolated.
Cond. GPM =
MBH x 2
Cond. Water Range (ºF)
EVAPORATOR CORRECTION FACTORS
FF=TEMP SPLIT
0.00010
0.00025
TONS
COMPR KW
TONS
COMPR KW
6
0.976
0.996
0.969
0.997
8
0.990
0.999
0.960
0.996
10
1.000
1.000
0.991
0.999
12
1.009
1.001
0.999
1.000
14
1.017
1.002
1.007
1.001
2.
Cooling Water Quantity
– Ratings are based on 10ºF chilled water range with the
evaporator at sea level. Use the chilled water correction factors (below) for other
ranges except as limited by water pressure drop, minimum or maximum water flows
for the evaporator.
CONDENSER CORRECTION FACTORS
FF=TEMP SPLIT
0.00025
0.00050
TONS
COMPR KW
TONS
COMPR KW
6
1.020
0.963
1.014
0.974
8
1.010
0.982
1.019
0.990
10
1.000
1.000
0.995
1.010
12
0.990
1.019
0.985
1.029
14
0.980
1.040
0.975
1.048
Note: Temperature split factors @ 85ºF Entering Condenser Water Temp (ECWT)
3.
Condenser Water Quantity
– Ratings are applicable from 2 to 4 GPM/Ton. Use the
condenser water correction factors (below) for different ranges except as limited by
water pressure drop or minimum or maximum water flows for the condenser. Using
the heat rejection (MBH), the Condenser GPM is calculated as follows:
4.
Fouling Factors
– Ratings are based on 0.0001 evaporator and 0.00025 condens-
er fouling factor. For other fouling factors, consult the table below or contact your
Quantech Sales Representative.
Selection Data
Содержание QWC3
Страница 1: ...MODEL QWC3 WATER COOLED SCROLL LIQUID CHILLER 50 200 TONS 60Hz R 410a FORM QWC3 EG1 217 ...
Страница 4: ...QUANTECH FORM QWC3 EG1 217 4 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 39: ...FORM QWC3 EG1 217 QUANTECH 39 Unit Dimensions Four Compressor Cont d ...
Страница 41: ...FORM QWC3 EG1 217 QUANTECH 41 Unit Dimensions Five Six Compressor Cont d ...
Страница 56: ...QUANTECH FORM QWC3 EG1 217 56 Typical Control Panel Wiring 4 COMPRESSOR UNITS LD21794a ...
Страница 57: ...FORM QWC3 EG1 217 QUANTECH 57 Typical Control Panel Wiring Cont d 4 COMPRESSOR UNITS LD21794b ...
Страница 69: ...FORM QWC3 EG1 217 QUANTECH 69 NOTES ...