Airedale Ultima Compact FreeCool 30kW - 450kW - Manual (Page 17)

Chillers ULTIMA COMPACT
Chillers
17
Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
Performance Data
OPERATING LIMITS
(For 100% Water)
Standard Unit
Minimum Ambient Air DB °C -5°C
Maximum Ambient Air DB °C Refer to Performance Data - Capacity Data
Minimum Leaving Water Temperature °C +6°C
Maximum Return Water Temperature °C +20°C
Unit with Electronic Fan Speed HP Control (-20°C)
Minimum Ambient Air DB °C -20°C
Maximum Ambient Air DB °C Refer to Performance Data - Capacity Data
Minimum Leaving Water Temperature °C +6°C
Maximum Return Water Temperature °C +20°C
1 Temperatures lower than those stated can be obtained with the addition of glycol.
2 For conditions outside those quoted, please refer to Airedale.
GLYCOL DATA Glycol is recommended when a supply water temperature of +5°C or below is required or
when static water can be exposed to freezing temperatures.
Ethylene Glycol Nominal Correction Factors
Glycol in System / Freezing Point ºC 10% / -4°C 20% / -9°C 30% / -15°C 40% / -23°C
Cooling Duty
Catalogue Data x by:
0.98 0.97 0.95 0.93
Input Power 0.99 0.98 0.96 0.95
Water Flow 0.99 1.02 1.04 1.07
Pressure Drop 1.05 1.20 1.38 1.57
Propylene Glycol Nominal Correction Factors
Glycol in System / Freezing Point ºC 10% / -2°C 20% / -6°C 30% / -12°C 40% / -20°C
Cooling Duty
Catalogue Data x by:
0.97 0.95 0.91 0.88
Input Power 0.99 0.98 0.96 0.95
Water Flow 0.98 0.97 0.95 0.95
Pressure Drop 1.08 1.17 1.31 1.45
Example UCC250D-6/2 operating at 7/12, 30°C Ambient, 20% Ethylene Glycol
Catalogue
Figure Multiplier
Corrected
Figure
Cooling kW (refer to Performance Data - Capacity Data ) 269.2 x 0.97
20%
Ethylene
Glycol =
261.1 kW
Input kW (refer to Performance Data - Capacity Data ) 79.2 x 0.98 77.6 kW
Flow l/s calculated
(DX (Mechanical Cooling kW)
12.8 x 1.02 13.1 l/s
T x 4.19
Pressure Drop kPa (refer to Waterside Pressure Drops ) 50.0 x 1.20 60.0 kPa