Selection Procedure - Carrier AQUASNAP 30RA010-055 Product Data

Selection procedure

Carrier's electronic catalog chiller selection program pro-
vides quick, easy selection of Carrier chillers. The program
considers specific temperature, fluid, and flow require-
ments and other factors, such as fouling and altitude
correction.
To select a 30RA chiller, use the electronic catalog or
follow one of the procedures below.
ENGLISH EXAMPLE
I Determine 30RA unit size and operating
conditions required to meet given capacity at
given conditions.
Given:
Capacity. . . . . . . . . . . . . . . . . . . . . . . . . 43 Tons
Leaving Chilled Water Temp (LCWT) . . . . . . .44 F
Cooler Water Temp Rise . . . . . . . . . . . . . . . 10° F
Condenser Entering Air Temp . . . . . . . . . . . .95 F
Fouling Factor (Cooler) . . . . . . . . . . . . . .0.00010
NOTE: For other than 10° F temperature rise, data
corrections must be made using the chiller program
in the electronic catalog.
II From Chiller Ratings table on page 26 and
pressure drop curves on page 23, determine
operating data for selected unit.
Unit . . . . . . . . . . . . . . . . 30RA-045 (single pump)
Capacity. . . . . . . . . . . . . . . . . . . . . . . .43.1 Tons
Chiller Power Input . . . . . . . . . . . . . . . . .51.1 kW
Cooler Water Flow . . . . . . . . . . . . . . . 103.3 gpm
Internal Pressure Drop. . . . . . . . . .20.5 ft of water
III Single pump selection. (See AquaSnap
pump selection on page 20.)
Required GPM (from above) . . . . . . . . . 103.3 gpm
Chiller Pressure Drop
(from chart on page 23) . . . . . . . . . . 20.5 ft wg
Additional External System
Pressure Drop (from jobsite) . . . . . . . . . 40 ft wg
Add Chiller Pressure and External
Pressure Drop . . . . . . . . . . . . . . . . . 60.5 ft wg
Using Pump Curve on page 21
Select . . . . . . . . . . Pump E at 103.1, 60.5 ft wg
To find pump horsepower, follow the 4.63-in. im-
peller curve for pump E on page 21.
Hp: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6 bhp
Max hp = 5 hp, therefore necessary hp does not ex-
ceed pump rating.
SI EXAMPLE
I Determine unit size and operating conditions
required to meet given capacity at given
conditions.
Given:
Capacity. . . . . . . . . . . . . . . . . . . . . . . . . 160 kW
Leaving Chilled Water Temp (LCWT) . . . . . . . 6 C
Cooler Water Temp Rise . . . . . . . . . . . . . . 5.6° C
Condenser Entering Air Temp . . . . . . . . . . . 35 C
Fouling Factor (Cooler) . . . . . . . . . . . . .0.000018
NOTE: For other than 6° C temperature rise, data
corrections must be made using the chiller program
in the electronic catalog.
II From Chiller Ratings table on page 27 and
pressure drop curves on page 23, determine
operating data for selected unit.
Unit . . . . . . . . . . . . . . . . 30RA-050 (single pump)
Capacity. . . . . . . . . . . . . . . . . . . . . . . .163.4 kW
Chiller Power Input . . . . . . . . . . . . . . . . .59.0 kW
Cooler Water Flow . . . . . . . . . . . . . . . . . .7.0 L/s
Chiller Pressure Drop . . . . . . . . . . . . . . 67.0 kPa
III Pump selection. (See AquaSnap pump selec-
tion on page 20.)
Required Flow
(from above) . . . . . . . . .7.0 x 3.6 = 25.2 m
Chiller Pressure Drop
(from chart on page 23) . . . . . . . . . . . 67.0 kPa
Additional External System
Pressure Drop (from jobsite) . . . . . . . . . 176 kPa
®
Add Chiller Pressure and External
Pressure Drop . . . . . .243 x .1018 = 24.7 m wg
Using Pump Curve on page 21
Select . . . Pump E at 25.2 m
To find pump horsepower, follow the 4.63-in. im-
peller curve for pump E on page 21.
Hp: . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.86 bhp
Max hp = 5 hp, therefore necessary hp does not ex-
ceed pump rating.
3
/hr
3 /hr and 24.7 m wg
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