Installation, Maintenance and Commissioning Manual :6877419 02/2013
Mechanical Data – W2W2 Continued
SC25D080-W2W2 SC25D090-W2W2 SC25D0100-W2W2
Standard Dry Cooler Match 2 x DR55 2 x DR70 2 x DR70
Capacity
Nom Cooling (Gross) – W2 (1) kW 77.6 84.6 96.3
Total Heat of Rejection – W2 kW 99.2 109.1 124.5
Capacity Steps 4 4 6
Fan Gain (5) kW 2.16 2.61 3.01
Dimensions – W x D x H
Mm 2549 x 890 x 1980 2549 x 890 x 1980 2549 x 890 x 1980
Weight – Machine / Operating
(2) Kg 1090 / 1110 1220 / 1230 1230 / 1250
Construction
Panels: Galvanised Sheet Steel, Epoxy Baked Powder Paint – Black Grey (RAL 7021)
Material/Colour Frame: Anodised Aluminium Frame with Black Nylon Corners
Evaporator
Rifled Copper Tube/Turbulated Hydrophilic Coated Aluminium Fins
Cooling/Dehum Stages 4/1 4/1 6/1
Condenser
Stainless Steel Brazed Plate
Water Volume l 11 16.7 16.7
Water Flow l/s 2.43 2.69 3.09
Pressure Drop Condenser kPa 47.45 21.32 27.78
Dry Cooler
Water Volume L 43.2 55.9 55.9
Flowrate l/s 2.43 2.69 3.09
Pressure drop kPa 29.8 42 50
Fan Motor
Backwards Curved, Centrifugal direct drive
Motor Type AC AC AC
Quantity x Motor Size kW 3 x 2.38 3 x 2.38 3 x 2.38
Speed @25Pa / Maximum ESP RPM 1066 / 1364 1207 / 1360 1360 / 1360
Maximum ESP Pa 353 203 20
Nominal Airflow m³/s 5.2 5.9 6.5
Compressor – Scroll
Configuration – W2W2
Dual Circuit – Circuit 1 Tandem Compressors (Water Cooled)
Circuit 2 Tandem Compressors (Water Cooled)
Quantity – W2W2 4 2 2
Oil Charge Volume – W2W2 l 4 x 1.57 4 x 3 4 x 3
Oil Type Polyolvinyl Polyolester
Refrigeration
Dual Circuit
Refrigerant control and type Thermostatic Expansion Valve (Optional EEV)
Refrigerant type R410A
Holding Charge Inert Gas
Charge (Per Circuit kg 8.51 10.85 10.85
Connections
Water Inlet / Outlet –W2 mm 42 42 42
Condensate Drain Hose mm 22 22 22
Filtration Disposable to BS EN 779-G4
Quantity 4 4 4
OPTIONAL EXTRAS
Hot Gas Reheat -
(3)
Nom Heating (Gross) kW 11.5 12.2 12.2
Electric Heating (Total)
kW 21 21 31.5
Humidifier
Capacity kg/hr 15 15 15
Feed/Drain 3/4" BSPF Braided flexible hose / 19mm hose connection
Condensate Pump
Head m 10.8 10.8 10.8
Flow l/m 5 5 5
Drain 10mm Stainless steel Stub Connection
First upgrade Motor - EC Motor
Backwards Curved, Centrifugal direct drive
Quantity x Motor Size kW 3 x 2.2 3 x 2.2 3 x 2.2
Speed @ 25Pa / Maximum ESP rpm 1050 / 1360 1187/ 1360 1337 / 1360
Maximum ESP Pa 337 202 45
Fan Gain (5) kW 1.32 1.86 2.6
Second upgrade Motor - EC Motor
Backwards Curved, Centrifugal direct drive
Quantity x Motor Size kW 3 x 3.1 3 x 3.1 3 x 3.1
Speed @ 25Pa / Maximum ESP rpm 1069 / 1510 1212 / 1510 1354 / 1510
Maximum ESP Pa 487 351 195
Fan Gain (5) kW 1.3 1.85 2.6
Low Pressure Hot Water
(4) Copper Tube/Aluminium Fin
Capacity Gross kW 32.5 34.1 35.7
Water Flow (Nominal) l/s 0.72 0.76 0.79
Pressure drop kPa 37.4 21 21.8
LPHW Connection Sizes mm 22 22 22
(1) Entering air 24°C/45% RH condensing water in / out: 35/40°C
(2) Machine weight Includes a refrigerant charge / Operating weight includes calculated water volume
(3) Based on air temperature of 15.5 °C leaving the evaporator coil
(4) Based upon low pressure hot water 82 °C inlet / 71°C outlet. Air on 20°C.
(5) Fan gain based on 25 Pa ESP @ nominal air volume. Fan gain figure will change as airflow and ESP change.
W2W2
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