DATA & FACTS GEA Close Control - Delta GCI

1 Air Treatment Division DATA & FACTS . GEA Close Control E-Range Aerial Values Always On The Level Description GEA Close Control E Range The Range ..3. Upflow and Downflow Versions Direct Expansion and Chilled Water Units ..3. Key to Type Codes ..3. Energy Saving Options ..4. Dimensions Downflow Units ..5. Dimensions Upflow Units .. 6. unit Weights / Access / Typical Airflow Arrangements ..7. Guide Specification ..8. General Details .. 11. Cooling Performance: "X" & "A" Versions .. 13. Cooling Performance: "W" & "F" Versions .. 14. Cooling Performance: "C" Version .. 15. Electrical Details .. 16. "X" and "A" Version ..16. "W", "F" and "C" Version ..17. Schematic Diagrams .. 18. "X" "A" "W" "F" "C" Version ..22. Ancillaries and Options .. 23. 2 PR-2006-0296-GB y Subject to modifications y Status 05/2007. GEA Close Control The Range E Range Key to Type Codes Upflow and Downflow Versions Direct Expansion and Chilled Water Units The "E" Range of air conditioning units is compact and stylish with the higher performance and quality demanded by today's Close Control air conditioning market.

2 These units are designed and built using our unrivalled experience in Close Control air conditioning, with extensive testing of components and complete systems. Every aspect is engineered to ensure maximum reliability, economy of operation and long working life, together with ease of installation and maintenance. The "E" Range comprises eight (8) models, in four (4) cabinet sizes, with nominal capacities from 22 kW to 100 kW in the following versions: - - X: Split System using Denco Condensing Units. - A: Air Cooled DX System with inbuilt compressor(s) and using Denco DCRA. Condensers. - W: Water Cooled DX System with inbuilt compressor(s) and Water Cooled Condensers. - F: Ambicool System. - C: Chilled Water System. - D: Combicool System Key to Type Codes Example: U 54 A V G H. H = Humidifier fitted G = Front Grille Return - U only (as opposed to underfloor return). V = Variable Refrigerant Flow (VRF).

3 A = A - Air Cooled System X - Split System W - Water Cooled System F - Ambicool System C - Chilled Water System D Combicool System 54 = unit Size: 24, 34, 44, 54, 64, 74, 84 and 94. U = Upflow (D = Downflow). PR-2006-0296-GB y Subject to modifications y Status 05/2007 3. Energy Saving Options GEA Close Control E Range "E" Range air conditioning units incorporate all of the energy / cost saving benefits for which Denco products are renowned. These include: Ambicool (Glycol freecooling system) - "F" Version (not available on models 48 83). This substantially reduces annual energy consumption, and consequently costs, by exploiting low average ambient temperatures to provide partial or full freecooling. It is very unusual to experience the design summer ambient for any length of time, and external temperatures are generally considerably less for much of the year. This allows the drycooler to produce glycol at lower temperatures.

4 When the glycol is colder than the room air, it is passed through the economy coil before reaching the condenser, picking up some heat directly from the room rather than via the refrigeration system. Under conditions such as this, the compressor run time is reduced, thereby saving energy. As an example, some degree of freecooling is usually available for 70 % of the year in northern Europe, giving very substantial running cost savings. Variable Refrigerant Flow (VRF) - "V" Option This provides various compressor options for efficient part- load performance, with exceptional economy. Full Cooling Load Both compressors running to circulate the full design refrigerant flow in order to achieve specified maximum cooling capacity. The scroll compressor coefficient of performance (COP) is typically Part Load Operation Lead compressor only running to circulate approximately 60% of the refrigerant flow.

5 Evaporator and condenser are both oversized under this condition, causing increase in suction pressure and a reduction in discharge pressure. Resultant part-load COP increases to typically Secondary benefits include reduced temperature swing and increased compressor reliability caused by reduced cycling and an optional two-stage high-pressure trip. Lower inrush current and inbuilt redundancy is also provided by dual compressors and reduced humidifier run time due to the very high sensible heat ratio achieved at the higher evaporating temperatures. Payback period is typically less than one year. 4 PR-2006-0296-GB y Subject to modifications y Status 05/2007. GEA Close Control Dimensions Downflow Units E Range PR-2006-0296-GB y Subject to modifications y Status 05/2007 5. Dimensions Upflow Units GEA Close Contro E Range 6 PR-2006-0296-GB y Subject to modifications y Status 05/2007. GEA Close Control unit Weights / Access / Typical Airflow Arrangements E Range unit Weights Weights : (approx.)

6 Kgs 24 34 44 54 64 74 84 94. Version: "X" and "C" 345 345 485 485 735 735 795 795. Version: "A" 520 535 770 795 1045 1090 1220 1230. Version: "W" 535 550 860 890 1075 1130 1280 1305. Version: "F" 720 740 1165 1200 1480 1525 1705 1760. unit Access Requirements The "E" Range of air conditioning units has been designed to be completely front access for service / maintenance via the front hinged / removable doors. Therefore, no allowance for access to the ends or back is necessary, although the end panels can be removed in-situ if required. Typical Airflow Arrangements Section "A" Downflow, into raised floor. Return from room or ceiling. Section "B" Upflow, with horizontal discharge plenum, and front grille return. Section "C" Upflow, with ceiling duct extension and underfloor return. PR-2006-0296-GB y Subject to modifications y Status 05/2007 7. Guide Specification GEA Close Control E Range Cabinet The cabinets shall be attractively designed having bevelled corners with flush fitting curved panels.

7 Units shall have a rigid frame, manufactured from non corroding Aluzink, with hinged curved front panel(s) to provide access for installation and servicing. Panels shall be lined with class "O" non eroding insulation material with both thermal and acoustic properties. External panels shall be manufactured from pre-coated steel, colour Grey (RAL number 7024). Cooling Coil The coils shall be multi row constructed from 3/8" O/D copper tubes with mechanically bonded aluminium fins. Direct expansion coils shall have internal grooving for optimum heat transfer. The coil face area shall be maximised to ensure high sensible heat ratio and low airside pressure drop, thereby minimising fan power and noise level. A stainless steel drain tray shall be included to ensure efficient removal of the condensate, via a factory fitted trap. - DX: Units shall have one, two or four refrigeration circuits (dependent upon model), inclusive of liquid distributor, expansion valve, solenoid valve, sight glass and filter drier, and these components shall be housed in the cabinet.

8 - C: Units shall be fitted with a modulating 3 way valve having manual override facility with water pressure / temperature test points, and these components shall be housed in the cabinet. Fans Large, low speed, double inlet, double width fans with forward curved impellers and "sealed for life" ball or roller bearings shall be used to minimise noise levels. Units shall have one, two, three or four fans, depending on unit size, each fan to have its own TEFC motor and speed variation by manually adjustable pulley. Units shall include fan fail / airflow alarm which shall in the event of an alarm condition disable all outputs except unit run. 8 PR-2006-0296-GB y Subject to modifications y Status 05/2007. GEA Close Control Guide Specification E Range Electric Heaters Electric heaters shall have rigid Incoloy sheathed elements with stainless steel finning balanced over three phases and rated to operate at black heat.

9 Control shall be in one or two stages, each stage being protected by a high temperature safety cut-out. Filtration The filters shall have an efficiency of 30 % ASHRAE 52/76 Eurovent 4/5 arrestance value 90 % (G4). They shall be fitted in the return air stream, held by quick release retaining clips, and be accessible from the front of the unit . A differential pressure switch shall be fitted which, through the alarm facility in the microprocessor controller, shall indicate when the filters need changing. Compressors Fully hermetic scroll compressors, one (or two - VRF only) for each refrigerant circuit, shall be located out of the airstream in the services section of the air handling unit for "A", "W" and "F" versions. The compressor(s) shall be located externally in the condensing unit for "X" versions. When fitted inside the unit , compressor(s) shall be resiliently mounted on a robust frame to minimise noise and vibration transmission to the structure.

10 Each compressor shall be fitted with back seating isolating valves together with crankcase heater ("X" systems only) and on larger models an oil level sight glass shall be fitted. An external adjustable high pressure cut off switch, with manual reset facility shall be provided for high pressure protection, in addition to the internal devices. To protect primarily against loss of refrigerant charge, an adjustable low pressure switch shall also be provided, which includes an automatic reset facility. On "X" and "A" versions a LP alarm delay function for temperatures down to -25 C is fitted as standard. Condenser Fan Speed Controllers shall be fitted as standard to units operating with air cooled condensers ("A" version). The controllers, one for each refrigeration circuit, are located within the service section of the Air Handling unit giving easy access for servicing and adjustment. Note: Where air cooled condenser are not of Denco manufacture, they must be single phase and have a FLC of less than 5A per circuit to operate with this option.