Perimeter Wall System Qvfc

Transcript

Perimeter wall system QVFC Perimeter wall system QVFC Key features • • • • • Perimeter wall system QVFC with heating, cooling and ventilation functions. Perimeter wall systems use the supply air force to create an airflow through induction that passes through the coil, which means that heated or cooled air is blown out of the unit. The perimeter wall system is positioned along the perimeter behind purpose built window benches. QVFC provides high comfort in the occupied zone with individual control. Examples of applications for perimeter wall systems are; offices, shops, schools, banks, hospitals and etc. Quick Selection Ventilation Heating Cooling Controls High capacity and small space requirement Specifications • Positioned along the perimeter behind purpose built window benches. • Automation and Control Equipment as accessory. • Designed for both new build and renovation and for replacing old perimeter units. Product code example QVFC-1300-40-200 Perimeter wall system QVFC with a nominal length 1300 mm , supply air flow from the unit of 40 l/s and pressure setting 200 Pa. The diagram shows the approximate cooling effect, Ptot in W with a water flow of qw=0.05 l/s and an operating pressure of 200 Pa , temperature difference between room air and supply air Δt=8 °C and temperature difference between mean water temperature and room temperature Δt= 8 . Fläkt Woods 8976 GB 2015.11.30 1 (10) Specifications are subject of alteration without further notice. Perimeter wall system QVFC Technical data for cooling effect Nominal length=1000 mm (Coil length=700 mm) Airflow, pressure and temperature Table 2: Water flow, qw=0.05 l/s, Pressure drop water, Δpw=8.9 kPa. Several perimeter wall units connected together make an installation branch. The installation branch connection point is connected to a supply air duct with a normal pressure of 200 Pa. At lower pressure, for example 150 Pa, a lower cooling effect is achieved. The airflow at the connection point is equal to the total supply airflow along the installation branch. The supply air can be supplied to the room at a subnormal temperature of 8 °C cooler than the room temperature due to the special design of the supply air grille. ql, (l/s) 16 22 25 29 6 391 466 497 533 Ptot, (W) Pbatt, (W) LA10 , Δt, (°C) 8 483 568 603 641 Δt, (°C) 8 368 410 423 432 (dB(A)) 10 575 671 709 749 6 276 308 317 324 10 460 513 529 540 28 29 29 30 Nominal length=1300 mm (Coil length=1000 mm) Table 3: Water flow, qw=0.05 l/s, Pressure drop water, Δpw=11.4 kPa. Heating and cooling effects The performance tables display the cooling and heating effects for QVFC at 200 Pa. Cooling and heating effects are shown for the following nominal lengths: 800, 1000, 1300 and 1570 mm. At operating pressure of 250 Pa the effects are increased by approximately 10% compared to those values given. ql, (l/s) 22 24 30 37 42 6 542 561 620 683 722 Ptot, (W) Pbatt, (W) LA10 , Δt, (°C) 8 669 690 755 821 861 Δt, (°C) 8 511 517 539 555 559 (dB(A)) 10 797 819 890 960 1001 6 383 388 404 416 419 10 639 646 647 694 699 28 28 29 30 31 At operating pressure of 150 Pa the effects are reduced by approximately 10%. Nominal length=1570 mm (Coil length=1270 mm) The given effects apply to systems without casing. With casing the effects increases with approximately 10%. Table 4: Water flow, qw=0.05 l/s, Pressure drop water, Δpw=2.6 kPa. Total cooling effect ql, (l/s) The total cooling effect is achieved by the cooling effect from the supply air being added to the cooling effect from the coil. The cooling effect of the supply air is calculated as follows: 27 32 39 45 50 6 652 719 789 834 889 Ptot, (W) Pbatt, (W) LA10 , Δt, (°C) 8 804 881 958 1004 1065 Δt, (°C) 8 610 651 677 680 705 (dB(A)) 10 957 1044 1127 1174 1241 6 458 488 508 510 529 10 763 814 846 850 881 26 27 28 29 30 Note: Two circuit coil gives lower pressure drop. (troom–tsupply air) × q × 1.2; where: • troom = room air temperature in °C • tsupply air = Supply air temperature in °C • q = Airflow in l/s The heating capacity of the system is usually more than sufficient and therefore seldom affects the size of the system. Cooling effect operating pressure of 200 Pa on air side Nominal length=800 mm (Coil length=500 mm) Table 1: Water flow, qw=0.05 l/s, Pressure drop water, Δpw=5.27 kPa. ql, (l/s) 12.7 16.4 20.1 22.1 6 295 341 384 407 Fläkt Woods Ptot, (W) Pbatt, (W) LA10 , Δt, (°C) 8 393 415 464 490 Δt, (°C) 8 272 297 319 331 (dB(A)) 10 492 490 544 572 6 204 223 239 248 8976 GB 2015.11.30 10 339 372 399 413 27 28 28 29 2 (10) Specifications are subject of alteration without further notice. Perimeter wall system QVFC The above effects apply at the following ∆t: • ∆t=8 °C for cooling. • ∆t=30 °C for heating. Technical data for heating effect Heating effect at operating pressure of 200 Pa on air side Correction of effects at other Δt Nominal length=800 mm (Coil length=500 mm) Table 5: Water flow, qw=0.03 l/s, Pressure drop water, Δpw=1.93 kPa Ptot, (W) ql, (l/s) a) 0 12,7 16,4 20,1 22,1 20 169 751 863 957 1010 Δt, (°C) 30 253 1126 1098 1194 1249 Pbatt, (W) 40 337 1501 1332 1432 1489 20 169 446 469 475 479 Δt, (°C) 30 253 669 704 712 719 LA10 , (dB(A)) 40 337 892 939 949 959 Example: • Cooling effect at Δt=10 °C= effect in the table × (10/8) i.e. Pbatt × 1.25 • Cooling effect at Δt=6 °C = effect in the table × (6/8) i.e. Pbatt × 0.75 >20 27 28 28 29 a) 0 l/s = natural convection. Nominal length=1000 mm (Coil length=700 mm) Table 6: Water flow, qw=0.03 l/s, Pressure drop water, Δpw=1.2 kPa ql, (l/s) a) 0 16 22 25 29 20 193 655 701 712 618 Ptot, (W) Pbatt, (W) LA10 , Δt, (°C) 30 257 1039 1163 1209 1241 Δt, (°C) 30 257 924 1005 1029 1032 (dB(A)) 40 343 1347 1498 1552 1585 20 193 693 754 772 688 40 343 1232 1340 1372 1376 >20 28 29 29 30 a) 0 l/s = natural convection. Nominal length=1300 mm (Coil length=1000 mm) Table 7: Water flow, qw=0.03 l/s, Pressure drop water, Δpw=1.5 kPa Ptot, (W) ql, (l/s) Δt, (°C) 20 30 a) 271 361 0 22 932 1260 24 953 1289 30 968 1315 37 846 1313 42 972 1329 Pbatt, (W) 40 481 1698 1738 1777 1781 1806 Δt, (°C) 20 271 985 1010 1040 935 1073 LA10 , (dB(A)) 30 361 1313 1347 1387 1402 1430 40 481 1751 1796 1849 1869 1907 >20 28 28 29 30 31 a) 0 l/s = natural convection. Nominal length=1570 mm (Coil length=1270 mm) Table 8: Water flow, qw=0.03 l/s, Pressure drop water, Δpw=1.8 kPa ql, (l/s) *) 0 27 32 39 45 50 20 318 1129 1152 1139 963 1050 Fläkt Woods Ptot, (W) Pbatt, (W) LA10 , Δt, (°C) 30 424 1527 1561 1549 1499 1440 Δt, (°C) 30 424 1592 1638 1643 1607 1560 (dB(A)) 40 565 2058 2107 2097 2035 1960 20 318 1194 1229 1232 1071 1170 8976 GB 2015.11.30 40 565 2123 2184 2191 2143 2080 >20 26 27 28 29 30 3 (10) Specifications are subject of alteration without further notice. Perimeter wall system QVFC Pressure drop factors Pressure drop factors cooling at 0.05 l/s (Tube diameter Ø=28 mm) Size 800 1000 1300 1570 Size 800 1000 1300 1570 Size 800 1000 1300 1570 1 77,7 87,4 99,0 42,9 C-C 1.2 m Number of devices 3 6 9 78,0 78,3 78,6 87,7 88,0 88,3 99,3 99,6 99,9 43,2 43,5 43,8 12 78,9 88,6 100,2 44,1 1 77,7 87,4 99,0 42,9 C-C 2.4 m Number of devices 3 6 9 78,2 78,7 79,2 87,9 88,4 89,0 99,5 100,0 100,6 43,4 43,9 44,5 12 79,7 89,6 101,2 45,1 1 77,7 87,4 99,0 42,9 C-C 3.6 m Number of devices 3 6 9 78,6 79,5 80,4 88,3 89,2 90,0 99,9 100,8 101,6 43,8 44,7 45,5 12 81,3 90,9 102,5 46,4 Δpwater = (qwater × kcooling)2 Pressure drop factors heating at 0,03 l/s (Tube diameter Ø=22 mm) Size 800 1000 1300 1570 Size 800 1000 1300 1570 Size 800 1000 1300 1570 1 46,3 50,9 57,3 61,4 C-C 1.2 m Number of devices 3 6 9 46,6 46,9 47,2 51,2 51,5 51,8 57,6 57,9 58,2 61,7 62,0 62,3 12 47,5 52,1 58,5 62,6 1 46,3 87,4 99,0 42,9 C-C 2.4 m Number of devices 3 6 9 46,8 47,3 47,8 88,0 88,6 89,2 99,6 100,2 100,8 43,5 44,1 44,7 12 49,3 89,8 101,4 45,3 1 46,3 87,4 99,0 42,9 C-C 3.6 m Number of devices 3 6 9 47,2 48,1 49,0 88,3 89,2 90,0 99,9 100,8 101,6 43,8 44,7 45,5 12 49,9 90,9 102,5 46,4 Δpwater = (q water × k heating)2 C-C = Centre to centre distance between devices. Fläkt Woods 8976 GB 2015.11.30 4 (10) Specifications are subject of alteration without further notice. Perimeter wall system QVFC Dimensioning example Examples: • Calculate the heating-/cooling requirement and air volumes. • Perimeter wall systems are normally installed in series along the perimeter and together create an installation branch. The airspeed in the this branch must not exceed 7 m/s, which corresponds to 140 l/s at a duct size of Ø160 mm. Example ”air side” If each room should have 15 l/s , an installation branch can distribute air to 8 rooms because the duct size is Ø160 mm. A QVFC with Ø200 mm air duct can also be used, in which case contact your nearest Fläkt Woods sales office. Example ”water side” When dimensioning the water side, available pressure is dimensioned. One should not try to exceed 25 kPa in loop pressure drop. The valve authority must also be achieved on the unit valves, on both the heating and cooling side. Casing Purpose built casing must have open gap of at least 60 mm along the floor. Water temperature The following temperatures are recommended: • Incoming hot water temperature: Max 60 °C , Δt= 8 - 10 °C. • Incoming cold water temperature: Min 14 °C , Δt= 3 - 4 °C. The input hot water temperature should be as low as possible, preferably 40 °C. At this temperature heat from heat pumps can be used. The chilled water should have a constant flow temperature, for example 14 °C. The coil in the system normally permits differences between the room air temperature and the chilled water average temperature of up to 10 °C without risk of condensation build up. The supply air is cooled down to 14 °C on hot days and/or when there is high moisture content in the air. The air is dehumidified to reduce the risk of condensation over the coil and to increase available capacity. Operating Pressure Perimeter wall system QVFC is pressure tested to 1000 kPa before delivery. The highest recommended working pressure in an installation branch is 600 kPa. The units can be delivered pressure tested up to 1600 kPa, intended for working pressure up to 1000 kPa. Special editions Certain types of special edition of QVFC can be ordered, for example: • Air duct 200 mm . • Water pipes are positioned at the front edge of the unit to allow pillars to be bypassed. These deviations must be described in plain text when ordering. Fläkt Woods 8976 GB 2015.11.30 5 (10) Specifications are subject of alteration without further notice. Perimeter wall system QVFC Dimensions and Weights All lengths are in mm. Dimensions & weights Size 800 1000 1300 1570 Fläkt Woods 8976 GB 2015.11.30 Width, (mm) 70 70 70 70 Length, (mm) 534 734 1034 1304 6 (10) Weight, (kg) 10 11.5 15 19 Specifications are subject of alteration without further notice. Perimeter wall system QVFC Accessories Control equipment There are two options of room controllers for QVFC. STRA-01 simple controller with setpoint knob or STRA-24 with display and communication (Modbus or BACnet). For more information about the controllers and the available accessories see seperate documentation for STRA-01/STRA-24 Description STRA • Simple installation thanks to the separate bottom plate • Thermal actuators or 0...10 V control • Heating and cooling in sequence • Inputs for occupancy detector, window contact, condensation detector and change-over function Figure 2: STRA-24 Figure 1: STRA-01 Description, controller STRA-01: Simple controller with setpoint knob 3 different operating positions Description, controller STRA-24: Display Built-in temperature sensor Temperature control Communication via RS485: Modbus, BACnet or EXoline Table 9: Technical data STRA Supply voltage Internal consumption Ambient temperature Storage temperature Ambient humidity Protection class 18...30 V AC, 50...60 Hz 2.5 VA 0...50°C -20...+70°C Max 90% RH IP20 NTC type, measuring range 0...50°C, accuracy +/-0.5°C at 15...30°C Polycarbonate, PC 110 g Polar white RAL 9010 Light gray Built-in temperature sensor Material, casing Weight Colour Cover Bottom plate Table 10: STRA-24 Communication RS485 (EXOline or Modbus) with automatic detection/ change-over 8 bits, 1 or 2 stop bits. Odd, even (FS) or no parity. 9600 bps (not changeable) Communication Modbus - Bacnet - MSTP Communication speed This product conforms with the requirements of European EMC standards CENELEC EN 61000-6-1 and EN 61000-6-3, and the requirements of European LVD standard IEC 60 730-1. It carries the CE mark. Fläkt Woods 8976 GB 2015.11.30 7 (10) Specifications are subject of alteration without further notice. Perimeter wall system QVFC Actuator STRZ-70-00-01-0-1 The QVFC unit comes with factory fitted valves. Actuator suited for this valve is a normally closed (NC) actuator with 1 m cable. Table 11: Technical data Technical data: 230 V operating voltage, 2-position control signal AC/DC 24 V operating voltage, 2postion control signal or PDM 180 s 2.5 mm +/- 45 IP43, 45..90 IP41 5…50°C Upright to horizontal 2.5W 100 N - AC - AC/DC - Positioning time - Stroke - Degree of protection - Operation - Mounting postion - Operation effect - Positioning force Transformer STRZ-24-1 Technical data: - Input/Output voltage - Power VA - Protection - WxDxH - Degree of protection - Weight kg 230/24V 48 PTC-protection 77x123x70 IP44 1.2 Installation with wall brackets QVFZ-01 Wall bracket is available in a single length of 1900 mm. The total number of brackets required is based on the branch length. KVS settings QVFZ-06 accessory is available to set the KVS of the valve. Six positions are available to select. For more information, please see the Commissioning manual. Fläkt Woods 8976 GB 2015.11.30 8 (10) Specifications are subject of alteration without further notice. Perimeter wall system QVFC Application examples Fläkt Woods 8976 GB 2015.11.30 9 (10) Specifications are subject of alteration without further notice. Perimeter wall system QVFC Product code and accessories Product code Perimeter wall system QVFC-aaaa-bb-ccc Nominal length (aaaa) mm 800, 1000, 1300, 1570 Supply air flow from unit (bb) l/s Pressure setting/Operating pressure in unit (ccc)Pa Note: Controls and purging nipples are ordered and delivered separately. Valves are included in all QVFC perimeter wall systems. There is one valve for heating and one valve for cooling – both with adjustable kvs value. Accessory codes Wall bracket, length 1900 mm Outlet sleeve, fixed dimension, not telescopic QVFZ-01 QVFZ-02-bbb Height (bbb) mm 50-200 Key to set the KVS QVFZ-06 Controls Room controller Actuator 24V NC with 1m cable Transformer Fläkt Woods STRA-01-00-0-00 STRA-24-00-0-00 STRZ-70-00-01-0-1 STRZ-24-1 8976 GB 2015.11.30 10 (10) Specifications are subject of alteration without further notice.