GEA Denco Close Control Climate control with the best in precision Where just being precise is not precise enough Air Treatment / GEA Denco Ltd.

Close Control products GEA Denco Close Control - 11/08

Close Control Air Conditioning Product Range Precise control of temperature & humidity Modern design New Microprocessor controller Various air flow configurations and cooling media Extensive options list T-Range 9 capacities 3 – 84 kW E-Range 20 capacities 22 – 120 kW Heat Rejection Range Condensers 7 – 75 kW Condensing Units 4 – 38 kW Dry Coolers 32 – 75 kW GEA Denco Close Control - 11/08

Other GEA Denco Products A special range of products has been designed for specific sectors IP-Range: Full function, fully packaged for in room telecom applications 9 – 36 kW capacities EP-Range: Externally packaged weatherproof telecoms units, 5 – 21 kW capacities with a RP internal room mounting version available TW-Range: Full function T Range fully weatherproof for external telecoms HS-Range: High static, specifically for clean room applications GEA Denco Close Control - 11/08

LECUs in full cooling mode LECUs in recirculation mode Denco – Officecool The adaptable air conditioning system for the modern workplace Ease of reconfiguration to new layouts Individual control for users Effective operation Quiet conditioned air delivery Raised floor void distribution for natural convection LECUs in full cooling mode LECUs in heating mode LECUs in recirculation mode GEA Denco Close Control - 11/08

Officecool GEA Denco Close Control - 11/08

Zone Unit LECU Officecool 250mm - 300mm GEA Denco Close Control - 11/08

Raised Access Floors As the Access Floor is a major part of the system, it must form part of the design. The designers must ensure that The access floor pedestals, structural stringers and panels integrate with the underfloor system’s Fan Tiles (LECUs). The fire and air barriers under the floor meet requirements. The sub-floor is sealed against air leakage. GEA Denco Close Control - 11/08

Zone Units Schematic airflow diagram Officecool Zone Units Officecool - Down flow, Top return Officecool - Down flow, Bottom return GEA Denco Close Control - 11/08

Top return, Bottom discharge Denco Zone Unit Available in 6 models, 1, 2 & 3 fan modules Top return / Bottom discharge, Bottom return / Bottom discharge Chilled water or direct expansion cooling, air or water LPHW, heatpump or electric heating Proportional control humidification 655 10 kW 1255 20 kW 1847 30 kW Top return, Bottom discharge GEA Denco Close Control - 11/08

Fan Tiles ─ LECUS* Flexible Office LECU *local environmental control units GEA Denco Close Control - 11/08

Fan Tiles ─ LECUS* *local environmental control units GEA Denco Close Control - 11/08

Fan Tiles ─ LECUS* Top return, Bottom discharge *local environmental control units GEA Denco Close Control - 11/08

Fan Tiles ─ LECUS* Bottom return, Bottom discharge *local environmental control units GEA Denco Close Control - 11/08

Fan Tiles ─ LECUS* Micro climate Open plan office layout Fresh air Micro climate Exhaust air Filter Zone Unit Cooling Heating Hum Condi-tioned air Raised floor Hum Water supply (optional) LEC LEC Heating water (optional) Cooling medium Electrical supply Electrical supplies Drains *local environmental control units GEA Denco Close Control - 11/08

Heavy duty plastic lined panels Zone Units Section through Downflow Heavy duty plastic lined panels Large EC fan with flexible connection and anti-vibration mounts Cooling / heating coils Static regain plenum GEA Denco Close Control - 11/08

GEA Denco Zone Unit Inverter Driven Fans All units fitted with state of the art “Intelligent” Inverter Driven fans which are up to 40% more efficient than standard direct driven fans Benefits The fan software detects the power drawn by the fan and can relate this to the known fan speed. This gives a known point on the fan curve and so we are able to control the performance of the fan to suit our exact requirements. Control on constant air volume linked to return air temperature maximum and minimum speed setting available via 0-10 V signal GEA Denco Close Control - 11/08

Zone Units "Idle" Operating Point GEA Denco Close Control - 11/08

Zone Units "Boost" Operating Point GEA Denco Close Control - 11/08

Independent controller Fan Tiles ─ LECUS* Section through fan tile Supply air 20 °C Supply air (20C) Supply air (17C) Supply air (14 °C min) Return air 23C Return air 24 °C Return air 21 °C Independent controller Return air sensor Heater (opt) Damper Floor void sensor *local environmental control units GEA Denco Close Control - 11/08

Zone Unit & LECU* noise levels Quiet Zone units typically sub - NR38 at 1 m in room LECU Fanspeed Air vol (m³/s) NR at 1 m 1 0.084 18 2 0.11 25 3 0.14 31 4 0.16 37 5 0.21 45 *local environmental control units GEA Denco Close Control - 11/08

Features and Benefits Flexibility IN DESIGN You don’t want the layout of your office to be determined by the layout of the existing air-conditioning system. Flexibility IN USAGE You will save 70% when reconfiguring an office using an OfficeCool System, compared with a Ceiling Mounted 4 pipe fan coil system. GEA Denco Close Control - 11/08

Features and Benefits Typical Flexible Office layout GEA Denco Close Control - 11/08

Features and Benefits Typical Flexible Office layout GEA Denco Close Control - 11/08

1. Manual adjustment on LECU 2. Adjustment from BMS or intranet Features and Benefits Typical Officecool CONTROL Options 1. Manual adjustment on LECU 2. Adjustment from BMS or intranet GEA Denco Close Control - 11/08

GEA Denco – Compressed Air Dryers 50 years experience Range 25 – 150 m³/min capacity Newly developed MN Range Wide portfolio of associated products GEA Denco Close Control - 11/08

Requirements GEA Denco Close Control - 11/08

Requirements Equipment cooling High internal loads 500 – 1500 W / m² Sound level subordinated priority 100% availability redundant units (standby) Low fresh air rate low heat request < 5% / a All-season operation Small part loads GEA Denco Close Control - 11/08

Requirements Air requirements Narrow tolerances +/- < 1 °C, +/- 5% RH Humidity control high sensible cooling capacity high leaving air temperature approx. 12 °C – 14 °C large heat exchanger surfaces High air volume flow High quality air filter GEA Denco Close Control - 11/08

Unit assembly GEA Denco Close Control - 11/08

Unit Assembly Standard shipment T/E-Line Controller Switch cabinet Filter Heat exchanger Electric heating Humidifier Fan GEA Denco Close Control - 11/08

Unit Assembly T/E-Line Cooling capacity of 3 – 90 kW Refrigerant R407C standard Optional R410A and R134a possible System components in shipment Condensor Chiller Condensing units Comprehensive accessories Different versions for duct connections Hydraulic modules Modified fans, compressors Water detection GEA Denco Close Control - 11/08

Routing of Air Flow – Upflow server intermediate ceiling GEA Denco Close Control - 11/08

Routing of Air Flow – Upflow server GEA Denco Close Control - 11/08

Routing of Air Flow – Downflow server intermediate raised floor 24 °C 45% RH Room condition at equipment height, breathing level or 2 m above floor 22 °C 50% RH 16 °C 70% RH preferred min. void 300 mm GEA Denco Close Control - 11/08

Energy Efficiency  With a low pressure plenum (5-10 Pa) and efficient EC variable fan operation the system can around 20% more efficient than traditional VAV systems.  Night time cooling can be used to achieve energy savings and reduced CO2 emissions. GEA Denco Close Control - 11/08

Fresh air free cooling version Modulating damper Front return grille Exhaust air out Free cooling mode with ambients 2 °C below room set point Ambient air in Zone unit Damper modulates to provide required conditions Full recirculation with no free cooling at higher ambients GEA Denco Close Control - 11/08

Unit variants GEA Denco Close Control - 11/08

Unit variants Classic version for containers server room outside Variants of series: TW Range T wheather-proof EP Range (externally package) low-budget-version GEA Denco Close Control - 11/08

Unit Variants Packaged indoor mounting server room outside Variants: T IP Range (refrigeration circuit in unit) RP Range (room packaged) low-budget-version GEA Denco Close Control - 11/08

Unit Variants Reverse supply & return server room indoor Variant: T Range with optional Rear Air Return and Supply GEA Denco Close Control - 11/08

Unit Variants Classic version for rooms without a floor void server room Variants of series: T Range E Range HS Range (laboratory/clean rooms) GEA Denco Close Control - 11/08

Refrigeration versions GEA Denco Close Control - 11/08

Cooling Versions Air-cooled A-version outside unit refrigerant-condenser precision air conditioner indoor mounted application range server room server refrigeration circuit refrigerant heat exchanger GEA Denco Close Control - 11/08

Cooling Versions Air-cooled X-version outside unit condenser unit precision air conditioner indoor mounted application range server room server refrigerant refrigeration circuit heat exchanger GEA Denco Close Control - 11/08

precision air conditioner indoor mounted application range server room Cooling Versions Chilled water C-version outside unit Chiller precision air conditioner indoor mounted application range server room server chilled water refrigeration circuit heat exchanger GEA Denco Close Control - 11/08

Cooling Versions Watercooled W-version outdoor unit air-water-cooler precision air conditioner indoor mounted application range server room server refrigeration circuit water heat exchanger GEA Denco Close Control - 11/08

Cooling Versions Energy Saving Ambicool F-Version outdoor unit air-water-cooler precision air conditioner indoor mounted application range server room refrigeration circuit server summer water winter (< +11 °C) 2 heat exchangers GEA Denco Close Control - 11/08

Cooling Versions Energy Saving Combicool D-version out door unit precision air conditioner indoor mounted application range server room refrigeration by A, X, W, (C) -version server external chilled water 2 heat exchangers GEA Denco Close Control - 11/08

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