39HQM Central Station Air Handling Units AiroVison Guide Specifications

39HQM Central Station Air Handling Units AiroVison Guide Specifications Page 1

AiroVision Guide specifications 39HQM Central Station Air Handler Units Size Range: 936 to 81,360 Nominal m3/h 64 different standard sizes Non-standard model sizes (please contact factory) Insulation types for indoor, outdoor, vertical and ceiling mounting and stacked. Part 1 General 1.1 Quality Assurance A. Certification of our processes according to the international quality standard ISO 9001:2000 is customer guarantee for the quality of the Carrier product offering and the services provided B. The characteristic of the casing wall construction must be established in accordance with EN 1886, based on measurements carried out on a model box Mechanical Strength Class D1 Casing Air Leakage Class L1 Filter By-Pass Leakage Class F8 Thermal Transmittance Class T2 Thermal Bridging Class TB2 Acoustics Insulation HZ 125 250 500 1000 2000 4000 8000 db 9.2 10.5 12.4 13.5 20.4 34.7 42 C. CFC-Free Polyurethane insulation D. Airtight seal material meets NFPA 90A requirements for flame spread and smoke generation E. Casing sheet metal to withstand 500 hours salt spray exceeding ASTM B117 F. Air filters performance according to ASHRAE Standard 52-76 or EUROVENT Standard 5/6 G. Electric Heater Heating Elements manufactured accordance to NEC and UL Space Heating Standard No 1996 H. Fan performance tested and certified to DIN and AMCA Standard. I. Standard IE1 fan motor manufactured to conform IEC Standard (optional IE2 & IE3 motors with UL listed) J. ARI 1060 and Eurovent Certified Energy Recovery Wheels 1-2 Delivery, Storage and Protection A. All units shall be completely shrink-wrapped from the factory for protection during shipment. B. All units shall be using transport brackets in fan section, tighten spring bolt and fan discharge cover for protection during shipment C. All units shall be delivered with factory installed shipping skids and lifting holes. D. Inspect for transportation damage and store in clean dry place and protect from weather and construction traffic. Handle carefully to avoid damage to components, enclosures, and finish. Part 2 Product Overview 2-1 General Description Units shall ship in the number of sections necessary to meet project requirements and shall ship in as many splits as specified in selection software. Unit shall include all specified components installed at the factory, the air-handling unit may consist of the following. 2-1-1 Standard Heating, Cooling and Energy Recovery Cooling & Dehumidification Chilled water coil and direct expansion coil. Sensible Heating Heating coil, Electric heater and steam coil. Pre-cooled & Re-heat. Heat pipe and run around coil. Heat Recovering Heat plate exchanger, heat recovery wheel and heat recovery heat pipe. Heating & Humidification Steam Humidifier 2-1-2 Standard Air Management Indoor Air Quality Double Skin Casing, Sand Trap Louver, standard Air Filter & Humidifiers and Energy Recovery Heat Exchanger. Pre-filtering up to HEPA-filtering MERV1 up to MERV18 2 & 3-Way Air Mixing Plenum. Sound Attenuator. 2-1-3 Standard Air Movement Double inlet double width fans. Forward, backward and aerofoil and plug fan Variable Air Volume Variable Frequency Drive and Variable pitch pulley. Totally Enclosed Fan Cooled, IP55 Fan Motor Drive package. Fixed Pulleys and Wedge Belts Rubber & Spring Vibration Isolators 2-2 Casing 2-2-1 Construction 2-2-1-1 The construction of the AiroVision air handling units consists of a frame and panels. Profiled 1-mm thick casing sides of galvanized and coated steel plates ensure a rigid and light weight frame. Page 2

2-2-1-2 The frame holds a 60-mm double-skin casing wall with panels, doors, inspection hatches and removable center posts. 2-2-1-3 Unit shall be constructed of a complete frame with easily removable panels. Removal of any panel shall not affect the structural integrity of the unit, thereby facilitating maintenance work. 2-2-1-4 Unit shall be thermally broken to minimize the conduction path from the inside of the casing to the outside. The construction should reducing machine noise, absorbing vibration and avoiding air leakage. 2-2-1-5 Mechanical performances tested and conformed to Eurovent Standard EN 1886 Mechanical Strength Class D1 Casing Air Leakage Class L1 Filter By-Pass Leakage Class F8 Thermal Transmittance Class T2 Thermal Bridging Class TB2 Acoustics Insulation HZ 125 250 500 1000 2000 4000 8000 db 9.2 10.5 12.4 13.5 20.4 34.7 42 2-2-2 Profile Frame 2-2-2-1 Heavy-duty profile frame made from galvanized steel, fully welded and hermetically sealed at the ends, profile is more robust and can be repeatedly disassembled. Profile is coating according to ASTM A 653/A 653 M-01. 2-2-2-2 Profile frames are painted with highly durable heat hardened polyester based powder paint RAL 7035 with 50 microns film thickness. 2-2-3 Double Skin Panel 2-2-3-1 Modular panel is design to be rigid and sturdy. Made of durable galvanized sheet steel treated with a weather and scratch-resistant coating on both sides, Base color grey (RAL-7035). 2-2-3-2 The standard casing wall construction consists of 0.8 mm internal and external skin with injected polyurethane, fire retardant according to DIN 4102 class B2, 40kg/m3 density, 0-19 W/M ºC K value. 2-2-3-3 The doors and the panels shall be formed by bending the panel external sheet metal over the internal sheet metal so that closed panel structure resistant to water and steam will be obtained. Bended external sheet metal structure of the panel (preventing the formation of sharp edges) also reduces the risk of any possible injuries during mounting and maintenance. 2-2-3-4 Tested for strength at ± 1000 Pascal with deflection < 1 mm/m and without permanent deflection at ± 2500 Pascal, confirmed to EN 1886 Class D1. 2-2-4 Thermal and Weather Protection 2-2-4-1 Panels are manufactured from steel sheets treated with weather and scratch-resistant coating on both sides RAL 7035, frames and roof are painted with highly durable heat hardened polyester based powder paint RAL 7035 with 50 microns film thickness. 2-2-4-2 The paint shall conform to ASTM D-2201 and ASTM D-2092 for gloss, adhesion, impact resistance, withstand up to 1000 hours salt spray resistance test, exceeding 500 hours ASTM B117. 2-2-4-3 Thermal Transmittance, U-value tested at 1- W/m2K conformed to Eurovent EN 1886 Class T2. 2-2-4-4 Thermal Bridging Factor kb 0.62 conformed to Eurovent EN 1886 Class TB2. 2-2-4-5 Fasteners are zinc coated comply with 400 hours salt spray resistance test ASTM B117. 2-2-5 Profile and Panel Seal 2-2-5-1 Panels and profile frames shall be assembled with a closed cell self-adhesive polyethylene seal installed in between them to prevent air leakage, reduce vibration noise and minimized thermal losses. 2-2-5-2 A closed cell self-adhesive polyethylene seal shall avoid external water from penetrate inside the unit and shall block heat infiltration and avoid external contamination into the conditioned space area inside the unit. 2-2-6 Casing Air Leakage The construction of panels to the profile frames shall provide minimum air leakage Class L1. Casing leakage tested and conformed to Eurovent Standard EN 1886. 2-2-7 Doors and Access Panels 2-2-7-1 Hinge type with handle and lock can only be opened with a special key, access door panel equipped with metal hinges with plastic cover. EPDM rubber sealed at door perimeter provides an effective airtight and protection from heat gain. 2-2-7-2 Access door type shall be at the Fan Section, filter section and the Mixing Box Section. View port can be added (optional). View port shall have double skin (there shall be glass on both interior and exterior surfaces of the viewing glass). 2-2-7-3 Safety Access Panels hinged access door type accessible internally and externally. 2-2-7-4 Removable Access Panels - the fixing of panel to the profile frames with bolts provide additional access to ease mobility for major service work on large and heavy component such as coil, fan and motor. Page 3

2-2-8 Roof (optional) 2-2-8-1 Roof prevents water penetration on top surfaces of the AHU when installed outdoor. Silicone shall be applied to the profile joints on the outer surface of the unit, increasing insulation against water. 2-2-8-2 Heavy gauge (G16) galvanized steel grade G90 and powder painted RAL7035, 50 microns thick. 2-2-9 Roof Curb (Base Frame) 2-2-9-1 A base shall be provided under the unit to avoid contact of the bottom surface of the unit with the others surfaces during transportation and installation, and to ensure required body strength. The height of the base shall be 62 mm, 160 mm base frame is available as an option. 2-2-9-2 Roof curb profiles, where the unit will be carried, shall be of closed section, high welded w and thus risk of its deformation during transportation shall be minimized. 2-2-9-3 Supplied with multiples holes to suit optimum hoisting stability. 2-2-9-4 Roof curb shall be from heavy gauge (2mm) galvanized steel, longitudinally welded with the profile, connected with 3 mm crossbar to form strong and rigid structure. Part-3 Air Mixing Section 3-1 General Description 3-1-1 Dampers construction are made from heavy gauge galvanized steel for sturdy and rigid structure. 3-1-2 Nylon or bronze bushing, metal side linkages enable damper blades to operate within low torque. 3-2 Damper Construction 3-2-1 Damper s blades shall be with a single skin laminar type, made from galvanized steel, operate in parallel or oppose blades position. 3-2-2 Standard class IV air leakage, 0.5% leakage rate at 100 Pascal P per square meter damper area, according to UL555S. 3-2-3 Side and blade seal damper with Class II air leakage, 0.2% leakage rate at 100 Pascal P per square meter damper area, (optional). 3-2-4 Shafts are with 12 mm diameter, seated on noncorrosive bronzed or nylon bushing for less resistance, free maintenance and lowest torque. 3-2-5 Extended shaft length is provided for provision to electrical motor actuator to regulate damper s blades opening and closing. 3-2-6 Frames are made from galvanized steel, reinforced at every 1200-mm and flanged at both ends to facilitate external ductwork or sand trap louvers connection. 3-2-7 Metal linkage made from steel pushrods is installed for dampers with top-rear position to allow damper to inter connected at open and closed position. 3-2-8 Damper blade s quadrant shall be assembled to guide blades opening and closing position. 3-2-9 Hinged type access door is assemble at Mixing Box Section. 3-2-10 Damper torque is printable from AiroVision selections for dampers, 2-Way Mixing Box and 3-Way- Mixing Box. Part-4 Air Filters 4-1 Preliminary Filters 4-1-1 Preliminary filter shall be made from synthetics media, in flat form or pleated form, shall be with galvanized steel frames, cleanable and washable. 4-1-2 Aluminum filter (Metallic) shall be from wire mesh form, shall be with galvanized steel frames, cleanable and washable. 4-2 Secondary Filters 4-2-1 Soft bag filters is up to 500 mm depth synthetics bag media and supported with galvanized steel frames. 4-2-2 Built from strong, robust materials they display excellent abrasional resistance and perform well up to 100% relative humidity and in high airflow and heavy dust loading conditions. 4-3 HEPA/Absolute Filter 4-3-1 Absolute filter is up to 630-mm depth synthetics or glass fiber bag media and supported with galvanized steel or aluminum frames. 4-3-2 Absolute air filter DOP-efficiency ranged from 95% up to 99.99% equivalent to EU10 up to EU12. 4-4 Filter Mounting Frame 4-4-1 Mounting frame is made from galvanized steel and filter can be accessed on to the mounting frame from front (front or rear access or existing frame mounting) or slide (side mounting) type. 4-4-2 Frame mounting or Slide rails should be sealed for a minimal air leak Class F8 according to EN 1886. Part-5 Coil Constructions 5-1 General Description 5-1-1 Coils shall be of the cartridge type, mounted on a condensate drain pan with a slide in-out coil track so that the complete assembly is wholly removable for easy maintenance. 5-1-2 Coils fabricated and tested in accordance with ASHRAE/ANSI 15 Safety Code for Mechanical Refrigeration (latest edition). Page 4

5-2 Coil Construction 5-2-1 Standard coil fins material shall be aluminum or copper or pre-coated aluminum. Aluminum coated steel fin is standard for steam coil. 5-2-2 Standard fin thickness is 0.12 mm, Fin s density can be from 8 FPI up to 14 FPI. 5-2-3 Fins shall be a collar type, assembled with 12.7 mm OD copper tubes (steel fins and steel tube for steam coils) and mechanically bonded to copper tube for greater heat transfer coefficient. 5-2-4 Standard copper tube 12.7 OD with 0.41 mm wall thickness. 5-2-5 Coil Frames are made from galvanized steel and painted for additional protection. Stainless steel SS 304 coil frames are available (optional). 5-2-6 Coil assembly shall sit within coil section face area and seal to the casing wall to avoid air by-pass, plate by-pass of removable type for easy access to header section. 5-2-7 Water coil headers are made from black steel barrel and connection with threaded end (11 TPI) steel stub, seamless copper barrel is available (option). 5-2-8 Water coil header s connection of copper, sweat type is available as an option. 5-2-9 DX coil headers shall be all copper tubes with sweat connection type. 5-2-10 Header s connections are sealed internally and externally with rubber seal to avoid air leaking through gap at coil panels. 5-2-11 Coils shall be counter flow and equipped with vent and drain (drain and vent - water coil only). 5-2-12 Coils shall be tested at 300-psig submerged under water, designed to operate up to 230 psig (16 Bar) at 200 F (93 C). 5-2-13 Extended header connections outside the coil section shall be protected with metal shield to avoid any damage during transportation. 5-3 Condensate Drain Pan 5-3-1 Single skin drain pan insulated with 60 mm panels from all sides. 5-3-2 Drain pan shall be mounted in slanted angle at one side for complete and positive drainage, drain connection shall be at one side. 5-4 High Efficiency Moisture Eliminator 5-4-1 Mineral reinforced PVC eliminator profile, highly efficient to trap moisture molecules at much higher velocity 4- m/s. 5-4-2 Eliminator shall be installed at downstream of the coil whenever face velocity approaching 2.5 m/s (2.3 m/s for fresh air coil at highly humid condition). 5-5 Coil Section Access Panel 5-2-1 Removable panel shall be assembled at both left and right side of coil section. 5-2-2 Coil panels shall be bolted externally, air tight sealed, easy removal and quick reassemble to facilitate access for service and maintenance. Part-6 Electric Heater Section 6-1 General Description 6-1-1 Electric heater shall be of the cartridge type. 6-1-2 Heaters shall be framed with a slide in-out track so that the complete assembly is removable. 6-2 Standard Electric Heater Closed Tubular Finned Type 6-2-1 Standard electric heater shall be from Closed Tubular Finned Type, composition 80% Ni and 20% Cr. 6-2-2 Heating component is according to AISI 321 and AISI 430. 6-2-3 Assembly of the heating element is secured inside the stainless steel spherical sheathed fins copper tube (except for heater for 460 volt heater without spherical fins). 6-2-4 Heater assembly, the basic components shall be a airflow switch, power terminal board, grounding lug and primary & secondary over load temperature sensor. 6-2-5 Components are assembled inside terminal box integrated with heating elements frame assembly. 6-2-6 Frames shall be from a heavy gauge (G16) galvanized steel frame. 6-3 Electric Heater Section Access Panel 6-3-1 Removable panel shall be assembled at electric heater section. 6-3-2 Panels shall be bolted externally, air tight sealed, easy removal and quick reassemble to facilitate access for service and maintenance. 5-3-3 Standard drain pan made of galvanized steel and powder painted. Stainless steel SS304 drain pan available as a standard option. Page 5

Part-7 Fan and Drive Section 7-1 DIN and AMCA DIDW Fans 7-1-1 Fan shall be forward, backward and airfoil curved, double inlet and double width (DIDW) centrifugal type. 7-1-2 Direct Drive DIDW Aerofoil fans and plug fans are available (optional). 7-1-3 Forward and backward fans are AMCA-200 air performance accredited. 7-1-4 Forward and backward fans are sound power level measurement according to AMCA 300 & 301. 7-1-5 Airfoil fans are accredited for AMCA 300 & 301 Sound power and AMCA - 200 for Air Performance. 7-1-6 Sound power level measured values have been converted to other operating speeds with a calculation procedure described in the BS 848 Part 2 standard, 7-1-7 Outlet side sound power levels according to ISO 5136, DIN 45635 Part 9, BS 848 Part 2 Chapter 6 or AMCA 330-97. 7-2 DIDW Fan Construction 7-2-1 Blades of the fans shall be from galvanized steel. 7-2-2 Backward and airfoil fan s blades shall be treated with polyester powder coat RAL 7030. 7-2-3 Fan scroll from hot dip galvanized steel JIS G3302 Grade SGCC. 7-2-4 No electrical spot welding is used as the scroll back is joined to the side plates with the Pittsbourgh lock forming system. This prevents any oxidation starting from the welding spots. 7-2-5 Light-construction side frames of the R versions are made with cold-formed, galvanized steel Sendzimir type EN 10142. 7-2-6 Heavy-duty side frames of the K, K1, K2, versions are made with hot-rolled steel sections welded and coated with alchidic-melamminic paint RAL 7030. 7-2-7 Wheel shall be statically and dynamically balance within fan operating speed in compliance to DIN ISO Standard 1940 with grade G4. 7-2-8 Fan shafts made from C45 carbon steel bars, All the shafts are coated, after assembly, with a clearly distinguishable, bright yellow protective paint. Stainless steel shafts can be provided on request (option). 7-2-9 Shaft diameters are selected to achieve a safety factor for critical speed 1.25 higher than the maximum operating speed. 7-2-10 Standard fan bearings R versions are eccentric clamp bearing type, single row ball bearing, mounted in pressed steel housing, pre-lubricated and sealed for life. 7-2-11 Reinforced fan bearings 7-2-11-1 K versions are self-aligning single row ball bearing, mounted inside cast iron pillow blocks, with grease nipples, bolted to the side-frames. 7-2-11-2 K1 versions reinforced single row, sealed ball bearings, locked on the shaft with a conical sleeve, mounted inside cast iron pillow blocks, with grease nipples, bolted to the side-frames. 7-2-11-3 K2 versions, Sealed heavy-duty bearings. For fan size 500 single row ball bearings with conical sleeve inside cast iron pillow blocks. For fan size 560,630,710 and 800 Double-row ball bearings with conical sleeve inside split block housings. For fan size 900 & 1000 Double row, self-aligning roller bearings inside single piece pillow blocks. 7-2-11-4 All the pillow blocks shall have grease nipples for lubrication and shall be bolted to specially reinforced side-frames. 7-2-12 Bearing s nominal life expectancy shall be 40,000 L10 operating hours (according to DIN ISO 281 Section 1). 7-3 IEC TEFC Fan Motor 7-3-1 Design and performance shall be according to IEC Standards. 7-3-2 Fan motor shall be suitable to operate with Variable Frequency Drive (VFD) or Frequency Inverter (FI) application. 7-3-3 Fan motor shall able to operate at maximum 50% of rated speed. At 50% of rated speed, the fan motor shall deliver 80% of rated torque and 40% of rated power. 7-3-4 Standard fan s motor shall be a Totally Enclosed Fan Cooled type (TEFC). 7-3-5 Motor s frame shall be from aluminum up to frame size or cast iron. 7-3-6 Index of Protection shall be with IP 55, motor shall be protected against dust and protected against jets of water from all direction. 7-3-7 Insulation Class F (T max 155 ºC) and Temperature Rise Class B ( T 80K). 7-3-8 Motor shall able to operate at 50 C operating temperature. 7-3-9 Motor shall have a thermal reserve to spare for overheating when induced by voltage fluctuation at ±10%, compliance to IEC 34-1. Page 6

7-3-10 Thermal Overload Protection Normally Closed Thermostat (PTO) shall be a standard accessory. Note: PTO shall provide general surveillance for nontransient overload. Bi-metallic strip with normally closed contact is indirectly heated when line current passes through the strip and shall shut down or restores supply circuits as necessary. PTO connection shall be mounted to control circuit and suitable for manual or automatic reset. 7-3.11 Positive Temperature Coefficient thermistor (PTC) shall provide general surveillance for transient overload and shall be mounted and connected to a relay in control circuit (option). 7-4 Highest Efficiency Vibration Isolation 7-4-1 Fan and motor assemble on a common base, FMB, fabricated from heavy gauge galvanized steel or cast iron steel. 7-4-2 Motor rail shall be a slide rail type for flexible belt tensioning. 7-4-3 Fan and motor assembly are totally isolated from AHU casing structure by isolators and flexible canvas. 7-4-4 Rubber isolators capable to achieve standard vibration isolation efficiency E80 up to E85. 7-4-5 Spring isolator, 250 micron powder paint, 50 mm free deflection capable to achieve critical vibration isolation efficiency E95 up to E99.9. 7-4-6 Fan shall be isolated to discharge panel with fire retardant fan flexible connection. 7-5 Pulleys and Belts 7-5-1 Fan drive package shall consist of fan and motor pulleys and assembled with Wedge belts. 7-5-2 Variable pitch pulley shall be available at motor drive up to 15 HP (11 kw) - option. 7-5-3 Standard belt Service Factor designed at minimum SF1.1 and flexible to reach up to SF1.5. Part-8 Energy Recovery Wheels 8-1 General Description 8-1-1 Highly efficient heat recovery above 80% efficiency. 8-1-2 Recover both sensible and latent energy. 8-1-3 The wheel shall have purge mechanism to provide definite separation of airflow minimizing the carryover of bacteria, dust and pollutants from the exhaust air to the supply air. 8-1-3 Cross contamination protection devices with non-contact synthetic brush seal and fixed and adjustable purge sector. 8-1-4 Very low wheel speed < 25 RPM. 8-1-5 Wheel housing made of galvanized steel, cartridge type, slide-in and slide-out installation into heat wheel section. 8-2 Sorption, molecular sieve desiccant wheel, Eurovent certified. 8-2-1 Rotor to recover sensible heat and latent heat to a high degree. 8-2-2 The sorptive coating of the enthalpy rotor provides an expanded capacity in transferring humidity. 8-2-3 Storage matrix made of standard aluminium foil set up of alternating layers of flat and corrugated foils. Surface is coated with a special molecular sieve to achieve very good sorptive properties. 8-2-4 Foil layers are stabilized together by means of interior radial spokes, fixed at hub and rim in special design for long term form stability (rotor Ø>800mm). Winded up to rotor Ø 2600mm. 8-3 Sorption, molecular sieve 3Å desiccant wheel, AHRI and Eurovent certified. 8-3-1 Rotor to recover sensible heat and latent heat to a very high degree. 8-3-2 The sorptive coating of the enthalpy rotor provides an expanded capacity in transferring humidity. 8-3-3 Storage matrix made of standard aluminium foil set up of alternating layers of flat and corrugated foils. Surface is coated with a special molecular sieve to achieve excellent sorptive properties. 8-3-4 Foil layers are stabilized together by means of interior radial spokes, fixed at hub and rim in special design for long term form stability (rotor Ø>800mm). Winded up to rotor Ø 2600mm 8-4 Hygroscopic Aluminum wheel, Eurovent certified. 8-4-1 Hygroscopic Rotor is a cost-efficient solution to recover sensible heat and transfer latent heat. It is suitable for standard applications in comfort ventilation. 8-4-2 Humidity is transferred in cases when the dew point of one of the air streams is reached (e.g. winter) and, to a fair degree, during the rest of the year. 8-4-2 Storage matrix made of standard aluminum foil set up of alternating layers of flat and corrugated foils. 8-5 Desiccant Aluminum Wheel 3Å ARI Certified (Optional) 8-5-1 Desiccant coated on to Aluminum based wheel for total energy recovery. 8-5-2 Excellent corrosion protection. 8-5-3 Highest recovery for latent energy. Best recovery operation for tropical weather. 8-5-4 Wheel edge hardened suit for marine and coastal application. Page 7

8-6 Desiccant Synthetic Wheel ARI Certified (optional) 8-6-1 Desiccant wheel effectively moisture from air via a process called sorption. 8-6-2 Desiccant coated on to Synthetic based wheel material for highest heat transfer and best corrosion protection. 8-6-3 Non-metal wheel, best corrosion protection for marine and coastal application. Part-9 Plate Heat Recovery 9-1 Static Aluminum plates, recover sensible energy. Standard crosss flow energy transfer efficiency performance up to 75%. Part-11 Run Around Coils 11-1 Provide solution for Pre-Cooling,, Re-Heating and Energy Recovery. 11-2 Water based mediumm within Cu/Al and Cu/Cuu coil construction. 11-3 Water circulated c byy pump. Pump and external piping accessories are field supply and field install. 11-4 Lower efficiency at 25% 10-5 No contamination - totally separate flow for Fresh Air and Return Air for Recovery application. 10-6 Free energy for Pre- Cooling and Re-Heating. R 9-2 Exhaust and Supply flow are separated by special seal of flat plate with swirl control. 9-3 Superb seal minimize cross contamination from Exhaust Air into Supply Air. Extremely low leak 0.2% of nominal airflow at 200 Pascal P. 9-4 Anti-corrosion and non-inflammability material. construction made of Aluminum 9-5 Potential latent energy recovery and condensation occurrence whenever Fresh Air temperatures lower than Exhaust Air dew point. Part-10 Heat Pipe System (optional) 10-11 Provide solution for Pre-Cooling, Re-Heating and Energy Recovery. 10-2 Refrigerant based medium within Cu/Al and Cu/Cu coil construction. 10-3 Natural refrigerant flow - no motor and no pump minimize maintenance. 10-4 Up to 40% efficiency. 10-5 No contamination - totally separate flow for Fresh Air and Return Air for Recovery application. 10-6 Free energy for Pre-Cooling and Re-Heating. Manufacturer reserves the rights to discontinue, or change at any time, specificationss or designs without notice and without incurring obligations Supersedes Version: N/A Effective Date: 28-07-2013 Page 8 Version: 39HQMSG-01