Fan - Powered Terminal Unit Series Flow

5/22/M/1 Fan - Powered Terminal Unit Series Flow Type TFP Trox (Malaysia) Sdn Bhd 20 Persiaran Bunga Tanjung 1 Senawang Land Industrial Park 70400 Seremban Negeri Sembilan Darul Khusus Malaysia Telephone +60-6-678 81 88 Telefax +60-6-678 82 88 wwwtroxmalcommy e-mail trox@troxmalcommy

Contents Description Description 2 Constructions Dimensions Materials 3 Aerodynamic Data 6 Technical Data Accessories 8 Nomenclature 9 Quick Selection 10 Electric Heater Data 13 Order Details 14 3 1 1 Velocity Flowgrid Primary Air 2 Fan Motor 3 Controls Package 4 Air Induction Port 5 Access Panel 2 5 4 Trox Series Fan VAV Terminal Boxes take primary and induced air and mix the two thoroughly to provide a constant air supply to the occupied zone of the building Total flow from the diffuser is kept substantially constant thus giving very good air distribution even with high turn down of the primary air volume The primary air damper can be fully shut, with 100% recirculated or induced air Trox Series Fan VAV Terminal Boxes have been designed and developed to achieve lower room noise levels Discharge and case radiated sound pressure levels of NC 35 can be achieved in the occupied zone Pressure independent control of the primary VAV damper is accomplished by use of a Multi-point flowgrid which gives accurate control of air flow even with a 90 bend on the inlet spigot Mixing between the primary airstream and the induced warm air from the ceiling void is by a forward curved blade centrifugal fan with direct drive motor This direct drive motor is of the permanent split capacitor type, suitable for use with stepless fan speed controllers Trox Series Fan VAV Terminal Boxes are eminently suitable for low temperature air applications If the supply air temperature is low, then the fan volume flow rate must be higher than the 100% primary air volume flow rate to ensure suitable air temperature at the diffuser Design of the TFP ensures that at 100% primary air, sufficient induced air is mixed with the primary air so that the air discharged has a conventional cooling differential which will not cause draught problems in the space being conditioned 2

Construction Dimensions Materials Trox Series Fan VAV Boxes save energy by utilising the warm air in the building already generated by other sources and mixing it with primary air before distributing a constant volume air supply direct to the occupied zone This reduces energy consumption, so providing long term operational savings Available in a range of sizes Trox Series Fan VAV boxes are suitable for pneumatic or electronic control Volume flow tolerance is dependent on the type of control system but is typically ±5% to ±10% of set volume The units are designed for use in VAV systems and in conjunction with DDC controllers permit communications between the boxes and a centralised control area General Series Fan VAV terminal VAV boxes are constructed from galvanised steel All 230 V electrical control components are protected by sheet metal enclosures The enclosure has a single electrical (230 V or 400 V) mains entry position Casing The casing is sturdily constructed of galvanised sheet steel The overall construction is reinforced to meet acoustic performance requirements - Casing with acoustic and thermal insulation, erosion resistant up to 20 m/s - High pressure side with duct spigot suitable for circular ducting - Low pressure side suitable for angle frames - Mounting brackets for support rods are provided on the top of the casing Access Panel To avoid removal of the terminal box once fitted in the system, an access panel is provided in the casing underside so that the fan/motor can be serviced, or in the unlikely event of failure, removed without disturbing the duct connections Type TFP without heater PLAN VIEW 150 Ø10 HOLES IN 4-OFF SUPPORT BRACKETS 150 CONTROLS ENCLOSURE WITH REMOVABLE LID MOUNTED ON DISCHARGE END OF UNIT Ø D PRIMARY AIR SPIGOT INTERNALLY MOUNTED FAN AS SPECIFIED ON ORDER SCHEDULE, SIZED TO SUIT PERFORMANCE REQUIREMENTS S 14 W UNIT BODY WIDTH 14 100 L UNIT BODY LENGTH DRIVE SIDE VIEW 40 SPIGOT CONNECTION LENGTH VELOCITY FLOW GRID FITTED IN PRIMARY AIR SPIGOT, TUBING TO CONTROLS IS RETAINED WITHIN THE MAIN BODY INDUCTION AIR PORT IN FRONT FACE, MAY BE SUPPLIED FITTED WITH INLET FILTER AS OPTIONAL EXTRA H UNIT BODY HEIGHT F I/S DUCT AIRFLOW DIRECTION VIEW ON DISCHARGE DUCT END E I/S DUCT G 32 Ø10 FIXING HOLES 4-OFF @ E + 20mm x F + 20mm CENTRES FULL WIDTH TWIN REMOVABLE ACCESS PANELS ON BASE OF UNIT Ø12 DRIVE SPINDLE VELOCITY GRID BARBED ELBOW CONNECTIONS PROTRUDE DRIVE SPINDLE SIDE OF UNIT C VIEW ON INLET SPIGOT END Unit Spigot Size Size L W H C D E F G S 1 6 882 762 322 151 149 205 200 150 116 8 882 762 322 151 199 205 200 150 144 2 6 882 762 386 151 149 242 270 160 116 8 882 762 386 151 199 242 270 160 144 10 882 762 386 176 249 242 270 160 198 3 8 1047 912 446 151 199 242 327 160 124 10 1047 912 446 176 249 242 327 160 178 12 1047 912 446 201 299 242 327 160 238 4 10 1047 912 446 176 249 308 327 220 178 12 1047 912 446 201 299 308 327 220 238 14 1047 912 446 251 349 308 327 220 307 5 12 1182 1142 446 201 299 308 327 220 238 14 1182 1142 446 251 349 308 327 220 307 16 1182 1142 446 251 399 308 327 220 365 3

Construction Dimensions Materials Insulation - The inside of the terminal box is acoustically lined with 25mm faced insulation - The access panels are also lined with the same material - All lining materials have Class O fire rating conforming to UK building regulations VAV Section Volume Flow The Series Fan VAV Terminal Box is suitable for pressure independent control Volume flow is sensed by a multi-point, averaging flowgrid measuring pressure differential - Primary volume flow tolerance is dependent on type of control system but is typically ±5% to ±10% of set volume - Primary volume flow control range typically 100% to 10% depending on type of control - Pneumatic or electronic controllers can be fitted - Primary air volume flow range adjustment at factory with factors supplied to allow site adjustment - Volume measurement can be made on site using the flowgrid; also adjustment of volume flow through controller - Control and full shut off is achieved with a single damper Pressure Differential Flowgrid - Minimum pressure differential signal from 2Pa upwards - Sensor tubes in aluminium - Test pressure tappings are supplied with tight fitting caps - Calibration graphs and constants are provided to relate volume flow in litres/second to the measured pressure differentials - The differential pressure generated by the averaging sensor is within ±3% of the calibration chart value over the range of typical primary air flow rates Type TFB with Electric Heater PLAN VIEW Ø10 HOLES IN 4-OFF SUPPORT BRACKETS CONTROLS ENCLOSURE WITH REMOVABLE LID MOUNTED ON DISCHARGE END OF UNIT 150 150 ELECTRIC HEATER ENCLOSURE WITH REMOVABLE LID FOR HEATER ELEMENT ACCESS Ø D PRIMARY AIR SPIGOT 14 W UNIT BODY WIDTH 14 INTERNALLY MOUNTED FAN AS SPECIFIED ON ORDER SCHEDULE, SIZED TO SUIT PERFORMANCE REQUIREMENTS 400 ELECTRIC HEATER DUCT SUPPLIED FITTED 100 L UNIT BODY LENGTH DRIVE SIDE VIEW S 40 SPIGOT CONNECTION LENGTH VELOCITY FLOW GRID FITTED IN PRIMARY AIR SPIGOT, TUBING TO CONTROLS IS RETAINED WITHIN THE MAIN BODY INDUCTION AIR PORT IN FRONT FACE, MAY BE SUPPLIED FITTED WITH INLET FILTER AS OPTIONAL EXTRA H UNIT BODY HEIGHT F I/S DUCT AIRFLOW DIRECTION VIEW ON DISCHARGE DUCT END E I/S DUCT G 32 Ø10 FIXING HOLES 4-OFF @ E + 20mm x F + 20mm CENTRES FULL WIDTH TWIN REMOVABLE ACCESS PANELS ON BASE OF UNIT Ø12 DRIVE SPINDLE C VELOCITY GRID BARBED ELBOW CONNECTIONS PROTRUDE DRIVE SPINDLE SIDE OF UNIT VIEW ON INLET SPIGOT END Unit Spigot Size Size L W H C D E F G S 1 6 882 762 322 151 149 205 200 150 116 8 882 762 322 151 199 205 200 150 144 2 6 882 762 386 151 149 242 270 160 116 8 882 762 386 151 199 242 270 160 144 10 882 762 386 176 249 242 270 160 198 3 8 1047 912 446 151 199 242 327 160 124 10 1047 912 446 176 249 242 327 160 178 12 1047 912 446 201 299 242 327 160 238 4 10 1047 912 446 176 249 308 327 220 178 12 1047 912 446 201 299 308 327 220 238 14 1047 912 446 251 349 308 327 220 307 5 12 1182 1142 446 201 299 308 327 220 238 14 1182 1142 446 251 349 308 327 220 307 16 1182 1142 446 251 399 308 327 220 365 4

Construction Dimensions Materials Control Damper The single blade damper is mounted in the circular duct behind the flow measuring grid The drive spindle is extended through the casing and a suitable actuator slips over the shaft and locks directly to it -The closed damper has a shut off leakage at 500Pa inlet pressure of less than 05% of rated flow - The damper blade is positively connected to its drive shaft which runs in maintenance free polyurethane long life bearings - EPDM synthetic rubber damper seal, thermoplastic elastomer compound seal suitable for temperatures up to 50 C Electric Heaters 1) The electric heater is available as an integral unit complete with controls including fuses and interlocks The integral air heater has elements designed for black heat operation and consists of 80/20 nickel chrome wire in a stainless steel tube filled with magnesium oxide An automatic reset high temperature cut out is fitted and a earth stud included The heater is manufactured to British Standards/Codes as applicable and fully factory tested An optional low air pressure switch can be fitted This switch will disconnect the heater if the fan stops The heater elements are wired back into the control enclosure, including the earth, and heater fuses can be supplied Control of the heater can be arranged for stepless control by thyristors Control type should be selected to suit the temperature controller used and the degree of accuracy required on temperature control 1) Typical details are given Electric heaters are available on request Full details required such as kw, Voltage, Phase should be stated 5

Aerodynamic Data Primary Air Volume Range Air Damper Leakage Minimum Inlet Static Pressure Performance Details - Discharge flow typically remains constant within ±75% from 100% primary to minimum primary air - Minimum primary air pressure differential required for values see Table 2 Notes The minimum primary air volume shown is the minimum factory set value for control purposes See Table 1 for leakage on full shut off Fan volume is given for a typical downstream pressure of 50 Pa Other downstream pressures duties available on request Table 1: Primary Air Volume Range Air Volume Air Volume Air Leakage V L Spigot Size @ 10 m/s duct velocity @ 2 m/s duct velocity @ 500 Pa L/s CFM L/s CFM L/s CFM 6 185 390 37 78 03 07 8 325 690 65 138 05 11 10 510 1080 102 216 08 17 12 740 1570 148 314 12 26 14 995 2100 199 420 15 32 16 1300 2750 260 550 20 44 When selecting the size of the primary air spigot, reference should be made to the quick selection details on pages 9 and 10 The minimum air volume controlled by the primary air damper is dependent on the volume controller specified Table 2: Minimum Inlet Static Pressure Unit Inlet V 1 p SI min size spigot CFM l/s inch wg Pa 255 150 006 15 1 8 340 200 006 15 425 250 006 15 510 300 006 15 340 200 006 15 2 10 510 300 006 15 680 400 006 15 680 400 006 15 3 12 765 450 006 15 850 500 006 15 1019 600 006 15 765 450 006 15 4 14 850 500 006 15 1019 600 006 15 1189 700 006 15 1019 600 006 15 5 16 1274 750 006 15 1529 900 006 15 1954 1150 006 15 6

Technical Data Accessories Fan and Motor The Series Fan VAV terminal boxes are fitted with fan casings (Scrolls) manufactured from sheet steel The fans have a forward curved fan impeller All fan motors are direct drive resiliently mounted via location brackets suitable for 230 volts 50 Hz single phase and are supplied with auto reset thermal overloads The fan motors are permanent split capacitor types fitted with permanently lubricated bearings All earthing wiring and component selection conforms to local wiring requirements Fan Motor Speed Control All fan motors fitted to Trox Series Fan VAV Terminal Boxes are suitable for fan speed control Supplied as standard is a manually adjusted solid state Triac based fan speed controller which provides stepless adjustable fan speed from maximum to minimum The system is matched to the motor and includes minimum voltage limits to ensure stable motor operation The control incorporates hard start, ie: maximum voltage for a defined short period to ensure that fan rotation is correct Accessories Provision is made on the induction port of the unit for the installation of air filters These are supplied as throwaway filters Table 3: Fan Motor Details Unit Motor Current Motor Watts Size at 230 V 50 H Z A 1 W 1 1 145 92 2 10 147 3 23 300 4 26 245 5 68 550 Power factor: 09 approx 7

Nomenclature Nomenclature NC 1 NC 2 NC 3 NC 4 NC 5 NC 6 : Room NC value calculated from octave sound power levels of ductborne discharge noise with 100% primary air at 100 Pa duct pressure and 50 Pa downstream static pressure (For assumptions see Table 4) : As NC 1 but at 250 Pa duct pressure : As NC 1 but at 500 Pa duct pressure : Room NC value calculated from octave sound power levels of radiated and induction port noise with 100% primary air at 100 Pa duct pressure and 50 Pa downstream static pressure (For assumptions see Table 5) : As NC 4 but at 250 Pa duct pressure : As NC 4 but at 500 Pa duct pressure p SD p SI in Pa: Downstream static pressure in Pa: Inlet static pressure p SI min in Pa: Minimum inlet static pressure V 1 in l/s (CFM) : Primary air volume flow rate V L in l/s (CFM) : Leakage volume flow rate across closed primary air damper W 1 A 1 Q in Watts: Output power of motor in amps: Motor running current (max) in kw: Heat output of electric heater 8

Quick Selection Procedure Discharge Quick Selection Procedure Discharge NC Levels The NC values have been calculated using procedures given in ARI Standard 885, with a Downstream static pressure (psd) of 50 Pa (02 inch wg) in all cases The following assumptions have been made for discharge NC values: - Environmental adjustment factor (ARI 885) - 1500mm (5ft) of 25mm (1 inch) lined duct - Unlined rectangular tee - Number of outlets as shown in Table 4 below - 1500mm (5ft) of 200mm (8 inch) dia lined flexible duct - End reflection of 200mm (8 inch) dia connection - Room effect 142m3 (5000ft3) and 3m (10ft) distance from source Example: Unit size 2 with 2 outlets Centre Frequency Hz 125 250 500 1k 2k 4k Total reduction sound power to sound 32 35 47 62 68 49 pressure level db For further information and explanation of NC value calculations please refer to your nearest Trox Sales Office Table 4: Quick selection Discharge Noise (100% primary air) Discharge Noise Unit Inlet V1 Flow division, p SI number of Size Spigot 100 Pa 250 Pa 500 Pa outlets CFM l/s 1) NC 1 NC 2 NC 3 255 150 1 <20 <20 <20 1 8 340 200 1 <20 <20 <20 425 250 1 22 21 22 510 300 2 23 21 23 340 200 1 <20 <20 <20 2 10 510 300 2 <20 <20 <20 680 400 2 <20 <20 <20 680 400 2 <20 20 21 3 12 765 450 3 <20 20 21 850 500 3 22 23 24 1019 600 3 25 26 28 765 450 3 <20 <20 <20 4 14 850 500 3 <20 <20 21 1019 600 3 <20 22 25 1189 700 4 23 24 26 1019 600 3 <20 <20 22 5 16 1274 750 4 <20 22 24 1529 900 5 25 27 29 1954 1150 6 21 33 33 1) Assumed number of outlets served by fan box for acoustic calculations Selection Method First select unit size on basis of fan volume flow rate from Table 4 or Table 5 From Table 1 select inlet spigot size to meet maximum and minimum primary air requirements as follows: - Review maximum size spigot for unit size selected - If selection not possible take next smaller size spigot - Continue until first suitable spigot size, to suit both maximum and minimum primary air volumes, is found Example: Unit size 2 with 2 outlets Given Fan flow 400 l/s Room noise limit NC38 Maximum Primary Air 380 l/s Minimum Primary Air 105 l/s Selection is Unit size 2 Spigot size 10 9

Quick Selection Procedure Radiated Quick Selection Procedure Radiated NC Levels The following assumptions have been made for radiated NC values: - Environmental adjustment factor (ARI 885) Ceiling Void/ceiling tile reduction as follows: Centre Frequency Hz 125 250 500 1k 2k 4k Reduction db 9 10 12 14 15 15 Example: All unit sizes Centre Frequency Hz 125 250 500 1k 2k 4k Total reduction sound power to sound 22 23 25 27 29 30 pressure level db For further information and explanation of NC value calculations please refer to your nearest Trox Sales Office - Room effect 142m3 (5000ft3) and 3m (10ft) distance from source Table 5: Quick Selection Radiated Noise (100% primary air) Radiated Noise Unit Inlet V1 p SI Size Spigot 100 Pa 250 Pa 500 Pa CFM l/s NC 4 NC 5 NC 6 255 150 <20 21 24 1 8 340 200 25 27 29 425 250 31 31 33 510 300 35 36 36 340 200 <20 <20 21 2 10 510 300 <20 23 28 680 400 26 30 33 680 400 27 28 31 3 12 765 450 29 31 33 850 500 31 33 35 1019 600 28 33 39 765 450 30 31 33 4 14 850 500 30 33 35 1019 600 33 35 37 1189 700 36 38 40 1019 600 39 41 42 5 16 1274 750 42 44 46 1529 900 44 46 49 1954 1150 46 48 10

Sound Power Levels Discharge Table 6: Discharge Sound Power Levels Discharge Sound Power Levels Unit Inlet V 1 Fan duty = 100% primary air, p SD = 50 Pa Size Spigot p SI - 100 Pa p SI - 250 Pa p SI - 500 Pa CFM l/s 125 250 500 1000 2000 4000 125 250 500 1000 2000 4000 125 250 500 1000 2000 4000 255 150 54 57 55 54 53 49 56 58 56 55 53 50 58 60 57 56 54 51 1 8 340 200 59 62 60 59 58 54 60 63 60 59 58 55 62 65 62 60 59 56 425 250 64 68 66 63 62 59 63 67 65 63 62 59 65 68 66 63 62 59 510 300 67 72 70 66 66 63 67 71 69 66 66 63 68 72 70 67 66 63 340 200 50 52 51 50 46 42 54 53 52 52 48 44 57 56 54 54 51 46 2 10 510 300 59 58 56 58 56 53 61 60 57 59 57 54 63 61 59 60 58 55 680 400 65 63 61 63 62 60 68 65 63 64 63 61 68 67 64 65 64 62 680 400 69 65 65 66 65 64 71 67 66 67 66 65 72 69 67 67 67 65 3 12 765 450 71 67 66 67 67 66 72 69 68 68 68 66 73 70 68 69 69 67 850 500 74 70 70 70 70 69 75 72 71 71 71 69 76 73 71 71 71 70 1019 600 76 73 72 72 73 71 77 75 73 73 74 72 79 76 74 73 74 73 765 450 63 62 62 61 59 57 67 66 64 63 61 59 69 67 65 65 62 60 4 14 850 500 65 64 64 63 61 59 69 68 66 65 63 61 71 70 67 66 64 63 1019 600 70 69 68 67 66 65 72 71 69 68 67 66 75 73 71 70 68 67 1189 700 75 73 71 70 68 67 76 74 72 72 70 70 77 76 73 73 71 71 1019 600 68 65 66 65 63 62 72 68 68 66 64 63 74 71 70 69 66 64 5 16 1274 750 72 70 71 69 68 67 75 72 72 70 68 67 78 74 74 72 70 69 1529 900 78 76 76 75 73 73 80 77 77 76 74 73 81 79 78 76 75 74 1954 1150 75 72 72 72 70 70 84 83 82 81 80 79 85 83 82 81 80 79 1) Sound power levels are in decibels re 10-12 wattts 11

Sound Power Levels Radiated Table 7: Radiated Sound Power Levels V Radiated sound power levels, including induction port noise Fan duty = 100% primary air, p SI = 50 Pa Unit Size Inlet Spigot 1 p SI - 100 Pa p SI - 250 Pa p SI - 500 Pa CFM l/s 125 250 500 1000 2000 4000 125 250 500 1000 2000 4000 125 250 500 1000 2000 4000 255 150 60 56 46 41 34 31 61 57 47 41 35 32 64 60 50 43 36 34 1 8 340 200 64 61 50 45 39 35 65 62 51 45 39 36 68 64 53 46 40 37 425 250 69 66 56 49 43 41 69 66 56 49 43 41 71 68 57 50 44 42 510 300 72 69 59 52 47 44 73 70 61 53 48 45 74 70 61 53 47 45 340 200 51 49 42 33 25 20 56 52 45 36 30 28 61 57 51 41 36 35 2 10 510 300 60 56 48 41 35 31 63 59 51 43 38 38 67 63 56 46 44 45 680 400 65 61 53 46 41 39 69 65 56 47 44 42 71 67 58 50 46 46 680 400 67 62 51 49 46 43 69 63 52 50 47 44 70 66 55 50 47 48 3 12 765 450 69 64 53 50 47 44 70 65 54 51 48 46 71 67 56 51 48 48 850 500 70 65 54 52 48 45 72 67 56 52 50 47 73 69 58 53 50 49 1019 600 67 63 54 51 47 42 70 68 56 55 50 45 75 72 61 55 52 51 765 450 70 64 51 46 43 42 71 66 55 48 44 47 73 68 59 51 47 49 4 14 850 500 70 65 52 47 43 42 72 67 55 49 45 47 74 69 60 51 48 50 1019 600 72 67 54 49 45 43 74 69 57 50 46 48 75 71 61 52 49 50 1189 700 75 69 57 51 48 46 76 71 59 52 49 49 78 73 62 54 51 51 1019 600 78 70 58 54 51 49 79 72 61 56 55 50 80 74 62 57 53 52 5 16 1274 750 79 73 60 57 56 51 81 75 62 57 55 52 83 77 65 59 57 54 1529 900 81 75 62 58 57 53 82 77 64 59 56 54 85 79 67 61 61 57 1954 1150 82 78 65 61 58 57 84 80 67 62 59 58 - - - - - - 1) Sound power levels are in decibels re 10-12 wattts 12

Order Details Specification Text Series Fan VAV boxes type TFP for constant room air supply volume combined with VAV primary air control having high turndown by use of a multi-point flowgrid Induction of warm air from the ceiling void by forward curved blade centrifugal fan with direct drive motor Single blade control damper with seal for shut off Stepless speed controller to enable fan duty to be set to match the downstream duct system pressure Materials Casing manufactured from galvanised sheet steel Internally lined with faced insulation Multi-point flowgrid constructed from aluminium tubes Fan casing manufactured from sheet steel Fan impeller from aluminium alloy or steel according to size Order Example Make : TROX Type : TFP-E-C/2x10/0/BC5/400-300-105 Order Code - Fan Assisted Terminal Box / / / / / TFP - E - C 2 x 10 0 BC5 400-300 - 105 Product Type Version Case Size Control Diagram Refer to Trox Handing L = Left Hand R = Right Hand Reheatiil E* = with electric reheat coil or no entry Filter C = Throwaway or no entry Induction flowgrid S = induction port with flow pressure differential sensor or no entry 1 2 3 4 5 Spigot Size 6 8 10 12 14 16 Always 0 Controller Refer to Trox or no entry Minimum primary air volume l/s Maximum primary air volume l/s Fan volume l/s *Electric Heater details to be given on separate schedule Design changes reserved All rights reserved Trox (UK) Limited (02/2003) 13