FPV, FDV Series Variable Volume Parallel Flow
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- Reynard Wilkins
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1 Product Overview Variable Volume/Parallel Flow Fan Powered Terminal s With the variable volume model, the conditioned primary air does not pass through the fan. The primary air section and the recirculating fan section operate independent of each other, except that both are under control of the same room thermostat. They are sequenced so that both sections generally do not operate at the same time. The primary air section responds to a demand for cooling, while the recirculating fan section responds to a demand for heating. Benefits of Variable Volume Fan Powered Terminal s The primary air valve is sized for cooling demand similar to single duct terminal design requirements. The recirculating air section is typically sized at 50% of the maximum primary air valve demand which results in lower noise, lower unit cost and reduced energy when compared to constant volume terminals. Construction Compact, durable zinc-coated steel casing means reduced ceiling plenum space requirements and protection from corrosion. Terminal casing is internally lined with fiberglass insulation. The insulation's high density skin provides erosion resistance while effectively attenuating noise. Insulation meets requirements of UL181 and NFPA-90A. Proven reliable primary air section with heavy gauge damper and low leakage blade seal. PRICE terminals come standard with SCR fan speed control for efficient, quiet adjustment of fan capacity. Electric motors are specifically designed to operate with SCR controls ensuring reliable maintenance free operation. Fan motor is isolated from the blower housing to reduce noise. Additional vibration isolators and heavy duty motor mounts are provided on large unit sizes. Energy efficient, fan motor is designed to meet consistent torque specifications providing reliable and repeatable performance. ECM Electronically Commutated Motors are available as an option. Large removable bottom access panel provides access to the interior of the unit for cleaning, inspection and service. Performance Acoustical and flow performance is AHRI certified providing reassurance that design goals will be met and that Price fan powered terminal units will provide occupant comfort and efficient operation. F-304 Model FDV 8000 SP300 Variety of Liners Quality Assurance Each Price fan powered terminal unit receives a full operational check before shipment and arrives factory calibrated in accordance with project specifications. This means costly labor and setup delays are avoided. s are certified in accordance with the AHRI 880 certification program. s are ETL listed to meet UL1995 and CSA No Options: Several other Price liner options available (FF - 3 /4" fiber free foam, FB- 5 /8" foil faced rigid fiberglass board, SM solid metal liner Merv 8 or 13 Filter Boot ECM (dual wall),pm perforated metal liner, AFPM- foil faced fiberglass with perforated liner). See page F403-F404 for detailed information about Price liners selection. ECM energy efficient motor option Discharge attenuator section (DAS) for reduction of discharge noise Inlet attenuator section (IAS) for reduction of radiated noise Merv 8 and 13 filter bank for enhanced filtration of recirculated air Hanger brackets and spring isolation All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
2 Product Information A Participating Corporation in the AHRI 880 Certification Program TM Features Recirculating fan section operates only on a demand for heat from the space thermostat. Primary air section controls are pressure independent on models FPV 8000, and FDV Size 20 and gauge construction (optional 20 gauge available) Size gauge construction. Zinc-coated steel housing, mechanically sealed, leak-resistant. 3 /4 in. thick, min 1.5 lb density fiberglass internal insulation coated to prevent air erosion and meets requirements of UL 181 and NFPA-90A. Optional 1 in. [25] thick fiberglass insulation is also available. Bottom access panel of fan section is easily removable for field service. Motor assembly is mounted on vibration isolators. Fan and motor assembly removable as a unit. Motors are 60 cycle, single phase, 115, 208, 240 or 277 VAC, lubricated, permanent split capacitor type. ECM electronically commutated motor available as an option. Solid state speed controller for adjusting fan section airflow. s are ETL listed to meet UL1995 and CSA No Dimensions for control shroud will vary for series 5000 units depending on the DDC controls supplier. A 2 in. collar is provided for inlet duct connection. Standard Motor Data Motor Full Load Amps Size H.P. 115V 208V 240V 277V 20 1 / / / / ECM Motor Data Motor Full Load Amps Size H.P. 115V 240V 277V 20 1 / / / Dimensional Data IP (in.)/si [mm] Primary Return Outlet Maximum Inlet Inlet Duct Size Size Fan cfm [L/s] A D E B C W H L ,8, / / / /2 [354] [152, 203, 254] [305] [394] [356] [318] [787] [445] [648] ,10, / / / /2 [637] [203,254, 305] [305] [394] [356] [318] [787] [445] [648] ,12, / / /2 [943] [254, 305, 356] [406] [394] [406] [381] [889] [445] [749] ,14, / / [1132] [305, 356, 406] [533] [457] [508] [445] [1073] [508] [889] , / /4 [1415] [356, 406] [533] [457] [610] [457] [1073] [508] [921] Product Key Product Selection Checklist 1] Select Inlet Size based on control and acoustic parameters. 2] Select Control type (Pneumatic, Digital) based on system design. 3] Select Accessories (Discharge or Inlet Attenuator) as required. 4] Select Reheat Coil, if required. 5] Select Control Sequence based on system design. Copyright Price Industries Limited All Metric dimensions ( ) are soft conversion. F-305
3 Accessories Hot Water Coils F Optional Larger Size (HC) Dimensional Data IP (in.)/si [mm] Standard Coils High Capacity Coils Connection Sizes Connection Sizes Size B C F 1 Row 2 Row B C A F 1 Row 2 Row 20,30 14 [356] 12 1 /2 [318] 1 [25] [22] [22] 18 [457] 14 [356] 1 3 /4 [44] 4 [102] 1 /2 [13] [22] [406] 15 [381] 1 [25] [22] [22] 20 [508] 17 1 /2 [445] 1 3 /4 [44] 4 [102] 1 /2 [13] [22] [508] 17 1 /2 [445] 1 [25] [22] [22] 28 [711] 17 1 /2 [445] 4 1 /4 [108] 4 [102] [22] [22] [610] 18 [457] 1 [25] [22] [22] 28 [711] 17 1 /2 [445] 4 1 /4 [108] 4 [102] [22] [22] Optional Discharge Location (D) Flush w/top - Sz. 10, 20, 40 3 /4" (19) to Top for other sizes See Note * B 1 /2" (13) 3" (76) " (22) 4 1 /4" (108) Out In 5" (127) C Water Connection Flow Slip & Drive Connection 1 and 2 row coils available. Coil factory installed at return air inlet. Hot water coils have copper tubes and aluminum fins with OD sweat connections. Connections: single row, size 20 and high capacity, single low 20, 30, 40 coils are 1 /2 in. [13] OD male solder. All other coils are in. [22] OD male solder. Method of venting coil is to be provided by installing contractor. Standard coils come with 10 fins per inch. Optional (HC) high capacity coils come with 12 fins per inch. Optional discharge coil location is also available. 6 1 /2" (165) 1" (25) Std 4" (102) HC 6 1 /2" (165) Optional Larger Size (HC) CAD - Access Door w/screws 4 (102) x 6 3 /4 (171) See Note #8 Optional Discharge Location (D) CADL - Access Door w/snap Latches 4 (102) x 6 3 /4 (171) CADQ - Access Door w/quarter Turn Sash Latches 4 (102) x 6 3 /4 (171) Dimensional Data IP (in.)/si [mm] Size 20, B 14 [356] 16 [406] 20 [508] 24 [610] Standard Coils High Capacity Coils Connection Connection Sizes Sizes C 1 Row 2 Row B C A 1 Row 2 Row 12 1 / /4 1 /2 [318] [22] [22] [457] [356] [44] [13] [22] /2 1 3 /4 1 /2 [381] [22] [22] [508] [445] [44] [13] [22] 17 1 / /2 4 1 /4 [445] [22] [22] [711] [445] [108] [22] [22] /2 4 1 /4 [457] [22] [22] [711] [445] [108] [22] [22] Discharge Electric Coils Dimensional Data Imperial (in.) / S.I. s (mm) Size Outlet Duct Size B x C D E F G 20,30 14 x 12 1 /2 (326 x 318) 15 (381) 16 1 /4 (413) 3 /4 (19) (22) x 15 (406 x 381) 15 (381) 18 1 /4 (464) 3 /4 (19) (22) x 17 1 /2 (508 x 445) 17 (432) 21 1 /4 (546) 3 /4 (19) (22) x 18 (610 x 457) 17 (432) 17 1 /4 (445) 3 /4 (19) (22) Coil factory installed at discharge. 1 in. [25] depth S and D adaptor required when mounting to attenuator /8 (270) F (457) Maxium Door Swing Slip & Drive Connection * Note: consult current submittal for actual dimensions and configurations. All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
4 Accessories Inlet Attenuator Section (IAS) 33 7/8" (860) Dimensional Data w/o Water Coil IP (in.) SI [mm] Size B C B C 20, /2 [381] [445] /2 [458] [445] [584] [508] [584] [508] Dimensional Data with Standard Water Coil IP (in.) SI [mm] Size B C B C 20, /2 [356] [318] [406] [381] /2 [508] [445] [610] [457] Dimensional Data with High Capacity Water Coil IP (in.) SI [mm] Size B C A B C A 20, /4 [457] [356] [44] /2 1 3 /4 [508] [445] [44] /2 4 1 /4 [711] [445] [108] /2 4 1 /4 [711] [445] [108] Internal insulation complies with UL181 and NFPA 90A. Attenuators shipped loose with slip and drive cleats or mounting angles where required. 22 gauge zinc-coated steel housing mechanically sealed and gasketed, leak-resistant construction. Inlet Attenuator 90 (IAS90) Discharge Attenuator Section (DAS) Dimensional Data IP (in.) SI [mm] Size W Z W Z 20, [762] [762] [762] [762] 50, [1016] [1219] Dimensional Data IP (in.) SI [mm] Size B C B C 20, /2 [356] [318] [406] [381] /2 [508] [445] [610] [457] Internal insulation 3/4 in. [19] complies with UL181 and NFPA 90A. Rectangular discharge opening with slip and drive cleat connection. Spring Hanger Brackets (HBS) Max. 3" (76) Max. 4 1/2" (114) Hanger Brackets (HB) Provides additional vibration isolation. Shipped loose for field installation. Copyright Price Industries Limited Provides a secure mounting method for suspending terminal when threaded hanger rods are utilized. Optional spring isolation brackets can also be supplied. 12 gauge zinc-coated steel. Shipped loose for field installation. All Metric dimensions ( ) are soft conversion. F-307
5 Accessories MERV 3 Clip on Throw Away Filters Filter Assembly (FTR) H Reinforced Media Side Flow Without Water Coil With Standard Water Coil 1 (25) High Capacity Water Coil 4 (102) A W 3 /4 (19) 1 (25) 4 (102) 1 (25) Filter Media Cardboard Frame Merv 3 Rating Filters are clipped to terminal casing Without Water Coil Size IP (in.) SI [mm] W H W H /8 [378] [441] /8 [378] [441] /8 [454] [441] [584] [505] [584] [505] With Standard Water Coil Size IP (in.) SI [mm] W H W H / /8 [394] [314] / /8 [394] [314] /8 [441] [378] /8 [505] [441] /2 17 [597] [454] High Capacity Water Coil IP (in.) Size SI [mm] W H A W H A / /4 [521] [352] [44] / /4 [521] [352] [44] /8 1 3 /4 [454] [441] [44] /8 4 1 /4 [759] [441] [108] /8 4 1 /4 [759] [441] [108] MERV 8 and 13 Filter Boot Filter MERV 8 and 13 Filter Boot H Flow Without Water Coil With Standard Water Coil 1 (25) High Capacity Water Coil 4 (102) A W 2 (51) Filter Media Cardboard Frame Merv 8 Rating Merv 13 Rating 1 3 /4 (44) 1 (25) 4 (102) Flow F-308 A L B Without Water Coil Size IP (in.) SI [mm] W H W H 20, /2 [368] [622] /2 [445] [622] / /8 [594] [594] / /8 [594] [594] Boot Size IP (in.) IP (in.) Size A B L A B L 20, /2 19 [381] [445] [505] /2 19 [457] [445] [505] /2 [610] [508] [394] / /2 [610] [508] [394] With Standard Water Coil Size IP (in.) SI [mm] High Capacity Water Coil IP (in.) Size SI [mm] W H W H W H A W H A / /2 [343] [622] / /2 1 3 /4 [445] [622] [44] / /2 [394] [622] /2 1 3 /4 [495] [622] [44] / /2 [495] [622] / /2 4 1 /4 [699] [622] [108] / /8 [594] [594] / /2 4 1 /4 [699] [622] [108] Boot Size IP (in.) IP (in.) Boot Size IP (in.) IP (in.) Size A B L A B L Size A B L A B L 20, /2 19 [381] [445] [505] 20, /4 [457] [356] [505] /2 19 [457] [445] [505] /2 19 [508] [445] [505] /2 [610] [508] [394] /2 19 [711] [445] [505] / /2 [610] [508] [394] /2 19 [711] [445] [505] All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
6 A Participating Corporation in the AHRI 880 Certification Program Factory Certified Low Leakage Construction (CLL) General Information Certified low leakage units are designed to target energy efficient installations where controlled casing leakage and condensation prevention are important. Factory Certified Low Leakage Terminals (CLL) are robust in construction, consistent in quality and offer clean outer appearance due to limited use of external duct sealers. Design features that promote functionality and appearance, while providing the flexibility to meet varied and more stringent leakage requirements: Large compression style access doors these specialized, gasketed access doors reduce leakage while improving serviceability through larger openings and quarter-turn latches. Material and Construction - All units have robust construction features that include flanged and gasketed casing connections at all external casing seams. The need for exterior duct sealer is reduced, resulting in a cleaner appearance. Inner casing and insulation seams are sealed with duct sealer or Hardcast tape to prevent thermal transfer and further reduce air leakage. Factory Testing to Ensure Required Leakage Performance - All production units are individually tested in Price factory to ensure compliance with project specific leakage requirements. Test results are recorded on a label and affixed to each CLL unit. Options: CLL3 - Factory leak tested up to 2% of max design flow at up to 3 in. w.g. (746 Pa) internal pressure. CLL4 - Factory leak tested up to 2% of max design flow at up to 4 in. w.g. (995 Pa) internal pressure. CLL6 Factory leak tested up to 2% of max design flow at up to 6 in. w.g. (1493 Pa) internal pressure. Inlet dampers are tested at up to either 3 in., 4 in., or 6 in. w.g. differential pressure and exhibit leakage rates of less than 2% of maximum nominal flow. For units, back draft damper leakage is not included in the casing leakage value. Fan Powered casings are factory tested at up to 3 in., 4 in., or 6 in. w.g. (746 Pa, 995 Pa, 1493 Pa) with leakage rates of less than 2% of scheduled flow. Model FDCV - CLL option being tested Factory Certification Label - Example Date: Tag # Order Number: Customer: Spec: Model: FDV5000 Size: 20 Calibrated cfm 300 cfm Damper Leakage: 0.00 cfm at 3 inwc Casing Leakage: 0.46 cfm at 1.5 inwc Copyright Price Industries Limited All Metric dimensions ( ) are soft conversion. F-309
7 Dimensional Data - (CLL) Certified Low Leakage Construction FDV5000 Backdraft Damper Discharge 3 /4 (19) 3 /4 (19) Straight Flange B 1 1 /2 (38) 1 (25) 1 (25) 4 3 /4 (120) NEMA1 Electrical Enclosure L 12 1 /2 (317) Optional Water Coil w/bottom CAD 6 1 /2 (165) Optional CAD Section Optional Slide-In 1 Filter Detail Return D 5 (128) 9 1 /2 (241) (Dia.14&16 = 11 1 /2 (292)) Primary 1 (25) Optional Controls NEMA1 Enclosure Coil Externally Wapped with 1 (25) Foil Faced Fiberglass Optional Slide-In 1 Filter Standard Motor Motor Full Load Amps Size H.P. 115V 208V 240V 277V 20 1/ / / / ECM Motor Motor Full Load Amps Size H.P. 115V 240V 277V 20 1/ / / W 3 1 /2 (89) 1 (25) C Dia. = A- 1 /8 (3) E H IP s 1 1 /4 (32) Return Inlet Compression Style Access Door for Sz = 18 x 18 (457x457), for Sz = 24 x 24 (610x610) w/quarter Turn Latches (Flexmaster or Equivalent) Outlet Duct Size Size Max. cfm Primary Inlet A D E B C W H L Gauge , 8, / / / / , 10, / / / / , 12, / / , 14, / / / , / /4 20 SI s Return Inlet Outlet Duct Size Size Max. cfm Primary Inlet A D E B C W H L Gauge , 203, , 254, , 305, , 356, , Multi-Point Sensor Notes: Internal Insulation - Fiberglass 3/4 in. [19] thick, Min. (1.5 lb density) which meets requirements of NFPA 90A and UL181. All internal insulation seams sealed with duct sealer or hardcast. Zinc-coated steel housing - Gauges shown in table, internally gasketed, low leakage construction. Low leakage damper construction - double gasket. Leakage certification label provided by factory. Controls mounted on left hand side of unit as illustrated. Electric motor one phase, 60 cycle. Listed UL1995 and CSA236 assembly. Left hand controls configuration is shown, right hand is also available. Hot water coils have copper tubes and aluminum fins with O.D. sweat connections. Method of venting reheat coil is to be provided by installing contractor. Liners available FG1, FB, FB1, FF, FF1. F-310 All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
8 Liners Terminal Casing Price offers an extensive Terminal Liner System to address the issue of terminal unit insulation fibers entering the air stream. Each liner system offers benefits that are designed to meet applications with various lining and insulation requirements. SM AFPM SM Solid Metal Liner System This system integrates a fiberglass insulating material with a solid sheet metal liner constructed from zinc-coated steel. The solid metal liner system complies with the following industry standards and tests: UL 181 ( Erosion) UL 181 (Mold Growth and Humidity) UL 723 (25/50) (Flame and Smoke) ASTM E 84 (25/50) (Flame and Smoke) ASTM C 665 (Fungi Resistance) ASTM C 1071 (Physical Properties) Solid metal liners offer the ultimate protection against exposure of fiberglass particles to the air stream. The fiberglass insulation is completely enclosed in metal eliminating the possibility of punctures exposing the fiberglass particles. This system is also resistant to moisture. The encased insulation pro vides thermal resistance, however, acoustic absorption of discharge noise is significantly reduced. The following thicknesses are available SM - 3 /4 in. [19] thick, R value=3.2 PM Perforated Metal Liner System This system integrates a fiberglass insulating material with a perforated metal liner constructed from coated steel. The edges are sealed with metal caps. The perforated metal liner system complies with the following industry standards and tests: UL 181 ( Erosion) UL 181 (Mold Growth and Humidity) UL 723 (25/50) (Flame and Smoke) ASTM E 84 (25/50) (Flame and Smoke) ASTM C 665 (Fungi Resistance) ASTM C 1071 (Physical Properties) The metal perforated liner system provides effective protection against damage of the insulation while maintaining some acoustic value. Small fiberglass particles could conceivably still escape through the perforations and moisture can also be exposed to the insulation. The following thicknesses are available PM - 3 /4 in. [19] thicks, R value = 3.2 PM AFPM Aluminum Foil with Perforated Metal Liner System This system integrates foil-faced fiberglass insulating material with a perforated metal liner. The edges are sealed with metal end caps to prevent particles from entering the air stream. The double liner system (aluminum foil/perforated metal) complies with the following industry standards and tests: UL 181 ( Erosion) UL 181 (Mold Growth and Humidity) UL 723 (25/50) (Flame and Smoke) ASTM E 84 (25/50) (Flame and Smoke) ASTM C 665 (Fungi Resistance) ASTM C 1071 (Physical Properties) The aluminum foil with perforated metal liner system provides effective protection against damage of the liner while maintaining some acoustic value. The aluminum foil prevents fiberglass particles from escaping through the perforations as well as resistance to moisture penetration. AFPM - 5 /8 in. [16] thick, R value=2.6 FF (FF50) 1/2 (13) or (FF) 3/4 (19) FF Fiber Free Foam Insulation System This system integrates an engineered foam which provides excellent insulating characteristics. The foam edges are self sealing due to the material s composition. The engineered foam meets requirement of NFPA 90A and complies with the following industry standards and tests: UL 181 ( Erosion) UL 181 (Mold Growth & Humidity) UL 723 (25/50) (Flame & Smoke) ASTM E 84 (25/50) (Flame & Smoke) CAN/ULC M88 (Flame and Smoke) Fiber free foam insulation totally eliminates the risk of fiberglass particles entering the air stream while maintaining thermal resistance and acoustic absorption. An important advantage over other liner systems is that even scrapes or punctures will not expose fibers to the air stream. The foam also will not absorb water, reducing the likelihood of mold or bacterial growth. Acoustic absorption of the foam insulation is equivalent to aluminum foil faced insulation. The following thicknesses are available FF50-1 /2" (13) thick, R value =2 FF - 3 /4" (19) thick, R value =3 Copyright Price Industries Limited All Metric dimensions ( ) are soft conversion. F-311
9 Liners Terminal Casing FB Foil Board Liner System FG Fiberglass Line FB This system integrates 4 lb. density rigid fiberglass insulating material with an aluminum foil facing. Exposed edges are coated with NFPA- 90A approved sealant. The fiberglass insulation and aluminum foil liner complies with the following industry standards and tests: UL 181 ( Erosion) UL 181 (Mold Growth and Humidity) UL 723 (25/50) (Flame and Smoke) ASTM E 84 (25/50) (Flame and Smoke) ASTM C 665 (Fungi Resistance) ASTM C 1071 (Physical Properties) Acoustic absorption of aluminum foil lined insulation is reduced compared to standard unlined units. The aluminum foil liner is non porous, thereby protecting the insulation from moisture. Damage to the liner can expose fiberglass particles to the air stream. The following thicknesses are available FB - 5 /8 in. [16] thicks, R-value =2.6 This system integrates 1.5 lb. density fiberglass insulating material to provide lining and insulation characteristics. Fiberglass insulation meets NFPA 90A requirements and complies with the following industry standards and tests: ASTM C 1071 UL 181 ( Erosion) UL 181 (Mold Growth and Humidity) UL 723 (25/50) (Flame and Smoke) ASTM E 84 (25/50) (Flame and Smoke) ASTM C 665 (Fungi Resistance) The following thicknesses are available FG50-1 /2 in. [13] thicks, R-value = 2.1 FG75-3 /4 in. [19] thicks, R-value = 3.2 FG1-1 in. [25] thick, R-value = 4.1 FG 3/4 (19) FDC with Solid Metal Liner (SM) and Inlet Attenuator Occasionally, fan terminals are specified to have a solid metal liner (SM) to eliminate the possibility of exposed fiberglass and to add rigidity to the units casing. However, it should be noted that the SM liner negates any sound absorption of the encased insulation, significantly increasing radiated noise levels. Typically, an inlet attenuator is selected to reduce radiated noise. The addition of a SM lined inlet attenuator will not provide any noise reduction or acoustical benefit while adding to the overall weight, size, and cost of the terminal. As a result, when any Fan Powered terminal unit is ordered with SM liner and an inlet attenuator section, the inlet attenuator will be supplied with perforated metal (PM) liner. The inlet attenuator will be constructed with 2 in. fiberglass insulation covered with perforated metal that has a low free area (12%) which effectively contains and protects the fiberglass insulation. The small perforations of 3 /32 in. dia staggered at 1 /4 in. allow sound waves to pass through, providing acoustic absorption which reduces radiated sound levels. The table below illustrates the acoustic absorption of the Price PM lined inlet attenuator when tested with Price FDC terminal. The SM lined inlet attenuator would have zero acoustic absorption. One primary feature of the Price Fan Powered terminal is very low sound levels. By offering a perforated metal liner on the inlet attenuator when the SM option is selected, the customer benefits from effective protection of the insulation and the lowest sound levels in the industry. Radiated Attenuation db For PM lined inlet attenuator sections Size Octave Band , 20, 30, Note: For SM lined attenuator all values are 0. F-312 All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
10 Fan Performance Curves PSC Motors Derate fan capacity by 10% when inlet filters are supplied Note: Data obtained in accordance with AHRI Standard Caution to Contractors Fan powered terminal units are not intended for use as temporary heat or ventilation during building construction. The terminal units are not designed nor equipped to operate in a dusty construction environment. Recirculating fan wheels can become coated with construction dust, resulting in an unbalanced wheel. This in turn can contribute to reduced motor life. Inlet air filters would provide little protection as they would quickly become plugged with construction dust. A fan powered terminal unit should never be operated if the downstream ductwork has not been installed. A minimum of 0.10 in. w.g. downstream static pressure resistance is required for safe operation of the recirculating fan motor. For terminal units with electric reheat a minimum discharge static of 0.2"w.g. is recommended for stable operation of heater controls. Please Note: Price cannot warrant against unauthorized operation under conditions as outlined on this page. Copyright Price Industries Limited All Metric dimensions ( ) are soft conversion. F-313
11 Selection Guidelines for ECM Motor TM To properly select a Price fan powered terminal unit with ECM motor, refer to the fan performance curves below. The fan curves give the range of external static pressure available at the discharge versus the range of air volumes. Fan selection must be within the bolded fan curve lines. The shaded area shown on the fan curves gives the range of constant fan flow operation for each size unit for external static pressures from 0.1 to 0.5 in. w.g. In this shaded area fan flow can be factory set to design conditions. Selection outside the shaded area is allowable. However, fan flow will vary according to the external static pressure applied to the fan. The solid state speed controller allows selection anywhere within the minimum and maximum fan flows. Selections in the midvolume range are recommended to reduce noise level and provide flexibility for future changes. The speed controller can be factory Fan Performance Curves ECM Motor set but can also be easily field adjusted if changes are required. When selecting a fan size from the performance curves, the static pressure loss of any accessories must be taken into account. The effect of the resistance of hot water heating coils on the fan performance is indicated on separate fan curves. For electric heating coils, the range for no coil can be used. If a fan selection is made near the maximum rated fan capacity and actual downstream system pressure is higher than anticipated, design volume will not be achieved. Note that in all cases a downstream resistance to the fan of at least 0.10 in. w.g. must be maintained to avoid overloading of the fan motor. For terminal units with electric reheat a minimum discharge static of 0.2"w.g. is recommended for stable operation of heater controls. F-314 All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
12 Fan Performance Curves ECM Motor TM Caution to Contractors Fan powered terminal units are not intended for use as temporary heat or ventilation during building construction. The terminal units are not designed nor equipped to operate in a dusty construction environment. Recirculating fan wheels can become coated with construction dust, resulting in an unbalanced wheel. This in turn can contribute to reduced motor life. Inlet air filters would provide little protection as they would quickly become plugged with construction dust. A fan powered terminal unit should never be operated if the downstream ductwork has not been installed. A minimum of 0.10 in. w.g. downstream static pressure resistance is required for safe operation of the recirculating fan motor. For terminal units with electric reheat a minimum discharge static of 0.2"w.g. is recommended for stable operation of heater controls. Please Note: Price cannot warrant against unauthorized operation under conditions as outlined on this page. Copyright Price Industries Limited All Metric dimensions ( ) are soft conversion. F-315
13 Fan Performance Curves ECM Motor TM Caution to Contractors Fan powered terminal units are not intended for use as temporary heat or ventilation during building construction. The terminal units are not designed nor equipped to operate in a dusty construction environment. Recirculating fan wheels can become coated with construction dust, resulting in an unbalanced wheel. This in turn can contribute to reduced motor life. Inlet air filters would provide little protection as they would quickly become plugged with construction dust. A fan powered terminal unit should never be operated if the downstream ductwork has not been installed. A minimum of 0.10 in. w.g. downstream static pressure resistance is required for safe operation of the recirculating fan motor. For terminal units with electric reheat a minimum discharge static of 0.2"w.g. is recommended for stable operation of heater controls. Please Note: Price cannot warrant against unauthorized operation under conditions as outlined on this page. F-316 All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
14 Recommended Volume Ranges CP 101 Size L/s Min.* L/s Max. cfm Min.* cfm Max Electronic or Digital Controls Size L/s Min.* L/s Max. cfm Min.* cfm Max Notes: Factory calibrated controls must be selected within the above flow range limits. A minimum value of zero is also available. The maximum flow setting of the controller must be equal to or less than the selected capacity of the recirculating fan. On controls mounted by Price but supplied by others, the air volume ranges are guidelines only. * Selection of airflow limits below the listed values is not recommended. Stability and accuracy may not be acceptable at lower than recommended airflow limits. The actual performance will vary depending on the terminal unit controls supplied. Minimum air fl ow limit is based on min.02 in. w.g. differential pressure signal from airflow sensor. Selection of air fl ow limits below the listed values is not recommended. Stability and accuracy may not be acceptable at lower than recommended airflow limits. The actual performance will vary depending on the terminal unit controls supplied. Maximum airflow limit is based on max 1.0 in. w.g. differential pressure signal from airflow sensor. Copyright Price Industries Limited All Metric dimensions ( ) are soft conversion. F-317
15 Typical Selection Guide Cooling Cycle 100% Primary Discharge NC Ps Across Radiated NC Ps Across flow Min. Ps Min. Pt. 0.5 in. w.g. 1.0 in. w.g. 1.5 in. w.g. 0.5 in. w.g. 1.0 in. w.g. 1.5 in. w.g. Size cfm L/s in.w.g Pa in.w.g Pa 125Pa 250Pa 375Pa 125Pa 250Pa 375Pa Performance Notes: 1. NCs are derived from sound power levels, which are obtained in accordance with AHRI Standard and ASHRAE Standard NCs are derived from sound power levels which include duct end corrections per AHRI Standard Please refer to page F25 for more details. 3. Blank spaces (--) indicate NCs less than flow is given in L/s and cfm. 5. ΔPs is the difference in static pressure from inlet to discharge of the unit. 6. ΔPt is the difference in total pressure from inlet to discharge of the unit. 7. Min. ΔPs is the minimum static pressure required to achieve rated airflow. 8. Pressure is given in Pa and in. w.g. 9. Fan external static pressure is 63 Pa (0.25 in.w.g) in all cases. 10. NC values are calculated based on typical attenuation values outlined in Appendix E, AHRI Standard , A Procedure for Estimating Occupied Space Sound Levels in the Application of Terminals and Outlets. Typical Attenuation Values: Radiated Sound Total Deduction Octave Band Mid Frequency, Hz All Sizes Discharge Sound Total Deduction Octave Band Mid Frequency, Hz < 300 cfm cfm > 700 cfm F-318 All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
16 Typical Selection Guide Heating Cycle Fan Only flow Discharge Radiated Size L/s cfm NC NC Performance Notes: 1. NCs are derived from sound power levels, which are obtained in accordance with AHRI Standard and ASHRAE Standard NCs are derived from sound power levels which include duct end corrections per AHRI Standard Please refer to page F25 for more details. 3. Blank spaces (--) indicate NCs less than Fan external static pressure is 63 Pa (0.25 in.w.g) in all cases. 5. NC values are calculated based on typical attenuation values outlined in Appendix E, AHRI Standard , A Procedure for Estimating Occupied Space Sound Levels in the Application of Terminals and Outlets. Typical Attenuation Values: Radiated Sound Total Deduction Octave Band Mid Frequency, Hz All Sizes Discharge Sound Total Deduction Octave Band Mid Frequency, Hz < 300 cfm cfm > 700 cfm NC vs Sound Power Levels Compare Them Carefully Price represents the sound performance data for the FPV/FDV series of fan powered terminals in two manners. The laboratory attained discharge and radiated sound power levels for each unit at various flows and inlet static pressures is presented in the Acoustical Data tables. This data is derived in accordance with AHRI Standard 880 and shows the 'raw' sound power levels of the terminal in the second through seventh octave bands with NO attenuation allowances. This data includes AHRI standard ratings which are on record with the -Conditioning Refrigeration Institute. Price also offers this Typical Application and Selection Guide to assist you in selecting the proper size and configuration of terminal for your needs. The attenuation allowances listed are based on values suggested in AHRI Standard , Appendix E. The suggested attenuation allowances are intended to be representative of typical jobsite constructions. If your conditions differ significantly from these it is recommended you utilize the sound power level data in the catalog and the procedures outlined in AHRI Standard If the NC levels listed in the Price catalog are being compared to other manufacturers Catalogd NC information, a careful review of the other manufacturers attenuation allowances must be made. If allowances other than recommended AHRI Standard , Appendix E are used, a fair comparison of NC levels cannot be performed. Copyright Price Industries Limited All Metric dimensions ( ) are soft conversion. F-319
17 Typical Selection Guide NC levels presented in the Typical Selection Guide are based on typical attenuation values as outlined in AHRI Standard , Appendix E. AHRI Standard , Appendix E provides typical sound attenuation values for air terminal discharge sound and air terminal radiated sound. The typical attenuation values are recommended for use by manufacturers to estimate application sound levels. In product catalogs the end use environments are not known and the factors presented in AHRI Standard are provided as typical attenuation values. Use of these values will allow better comparison between manufacturers and give the end user a value which will be expected to be applicable for many types of spaces. Following is a detailed description of the typical attenuation values used to determine NC levels. Radiated Sound Table E-1 of Appendix E provides typical radiated sound attenuation values for three types of ceilings: Type 1 Glass Fiber; Type 2 Mineral Fiber; Type 3 Solid Gypsum Board. Since Mineral Fiber tile ceilings are the most common construction used in commercial buildings, the attenuation values in the Typical Selection Guide are based on Type 2 Mineral Fiber. The following table provides the calculation method for the radiated sound total attenuation values based on AHRI Standard Octave Band Mid Frequency, Hz Environmental Effect Ceiling/Space Effect Total Attenuation Deduction The ceiling/space effect assumes the following conditions: 1. 5 /8 in. tile, 20 lb/ft 3 density 2. The plenum is at least 3 ft deep 3. The plenum space is either wide (over 30 ft) or lined with insulation 4. The ceiling has no significant penetration directly under the unit. Discharge Sound Table E-1 of Appendix E provides typical discharge sound attenuation values for three sizes of terminal units. 1. Small box defined as a unit with discharge duct of approximately 8 in. x 8 in. and capacity less than 300 cfm. 2. Medium box defined as a unit with discharge duct of approximately 12 in. x 12 in. and capacity between cfm. 3. Large box defined as a unit with discharge duct of approximately 15 in. x 15 in. and capacity of greater than 700 cfm. The following tables provide the calculation method for the discharge sound and total attenuation values based on AHRI Standard Small Box Octave Band Mid Frequency, Hz flow < 300 cfm Environmental Effect ft [1.5 m] Duct Lining End Reflection ft [1.5 m], 8 in [200 mm] Flex Duct Space Effect Sound Power Division Total Attenuation Deduction Medium Box Octave Band Mid Frequency, Hz flow cfm Environmental Effect ft [1.5 m] Duct Lining End Reflection ft [1.5 m], 8 in [200 mm] Flex Duct Space Effect Sound Power Division Total Attenuation Deduction Large Box Octave Band Mid Frequency, Hz flow > 700 cfm Environmental Effect ft [1.5 m] Duct Lining End Reflection ft [1.5 m], 8 in [200 mm] Flex Duct Space Effect Sound Power Division Total Attenuation Deduction For a complete explanation of the attenuation factors and the procedures for calculating room NC levels, please refer to AHRI Standard F-320 All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
18 Selection Guidelines Fan powered variable volume terminal units are designed for use in single duct VAV systems that require both cooling and periodic heating of exterior zones of a building. The basic fan powered terminal unit consists of a variable volume primary air section plus a fan section to recirculate warm ceiling plenum air. The design incorporates both the cooling and heating function into a single terminal unit casing. On variable volume models, the primary air section and the recirculating fan section both discharge into an integral acoustical plenum located behind the terminal unit outlet. The conditioned primary air does not pass through the fan. The two sections operate independent of each other, except that both are under control of the same room thermostat. Generally, both sections do not operate at the same time. The primary air section responds to the demand for cooling, while the recirculating fan section responds to a demand for heating. Fan Selection The fan flow is based on the heating load of the space or on the minimum flow desired to maintain diffuser performance and room air distribution. To properly select a Price fan powered terminal unit, refer to the fan performance curves. The fan curves give the range of external static pressure available at the discharge versus the range of air volumes. The solid state speed controller allows selection anywhere within the minimum and maximum fan curves. Selections in the mid-volume range are recommended to reduce noise level and provide flexibility for future changes. If a fan selection is made near the maximum rated fan capacity and actual downstream system pressure is higher than anticipated, design volume will not be achieved. Selecting a terminal at the minimum rated fan capacity results in an oversized unit with a larger horsepower motor than required. The larger motor running at minimum speed control settings will consume substantially more energy than a smaller motor at a higher speed control setting. Note that in all cases a minimum downstream resistance to the fan must be maintained to avoid overloading of the fan motor. This minimum downstream resistance is noted on the fan curves. Less downstream resistance can cause the recirculating fan motor to overheat and kick out on thermal overload. Continuing operation in an overload situation will adversely affect the motor bearings and contribute to reduced motor life. When selecting a fan size from the performance curves, the static pressure loss of any accessories must be taken into account. The effect of the resistance of hot water reheat coils on the fan performance Copyright Price Industries Limited is indicated on the fan curves. For electric heating coils, the range for no coil can be used. Primary Valve Selection The primary valve selection will be based on the minimum and maximum primary airflows determined to satisfy the space requirements. The maximum flow is determined by the space cooling load while the minimum flow is determined form the ventilation rate per ASHRAE Standard Price fan terminals are offered with inlet valve sizes ranging from 4 in.to 16 in. round. Each inlet size has a specific air volume range based on the minimum flow which can be accurately controlled to the maximum flow which will maintain reasonable pressure loss and noise level. Recommended air volume ranges are cataloged for each inlet valve size. Usually several inlet valve sizes will accommodate a particular set of minimum and maximum design flows. Pressure independent terminals (VAV) need to control at both the maximum airflow as well as the minimum airflow. The recommended maximum and minimum flow rates are intended to allow any controller to properly resolve the airflow signal and provide the opportunity for control. It is possible when a damper is mostly closed (at low flows), the control accuracy may be degraded as the damper actuator is only using a fraction of the damper travel or stroke and small All Metric dimensions ( ) are soft conversion. changes in damper position may generate significant changes in air volume. It is recommended that the terminal unit valve be sized for 75 to 80% of the rated air volume capacity. Minimum flow rates should be around 20% of the rated air volume for the most accurate level of control. Minimum Inlet Static Pressure For variable volume fan powered units the primary air valve bypasses the recirculating fan and discharges directly into an integral acoustical plenum located behind the terminal unit outlet. Therefore the primary air encounters all resistance downstream of the outlet including any accessories. The minimum operating static pressure at the inlet of the air valve of a variable volume unit includes the pressure drop across the unit, the pressure drop across any accessories, plus the pressure drop of the downstream ductwork. The minimum static pressures of the variable volume terminal units are listed in the typical selection guide. Note that for variable volume units the hot water coil is located on the return air inlet of the unit. Therefore the primary air valve does not encounter the resistance of the hot water coil, and this resistance is not included in the minimum operating static pressure. Electric coils are located at the discharge of the fan terminal, however the resistance of the coil can be considered to be negligible. F-321
19 Parallel Fan Powered Terminal Selection Example Isometric View Windows Plan View Windows 10 ft Windows 24 ft 24 ft Boardroom Supplied by Parallel Fan Powered Terminal This example examines a private boardroom that is located on the second floor of a 4 floor building with two exterior surfaces constructed of floor to ceiling glass. The space is designed for 30 occupants, a computer with LCD monitor, a projector, and T8 florescent lighting. The room is 24 ft wide, 24 ft long, 10 ft from floor to suspended ceiling and has a 14 ft floor to floor height. Space Considerations Heat load sources for each office space: qex = Heat gain from exterior surfaces (Summer), estimated to be 7.5 Btu/h ft 2 * qex = Heat gain from exterior surfaces (Winter), estimated to be Btu/h ft 2 * qoe = Heat load of occupants (30 people, 250 Btu/h) and equipment (496 Btu/h) ql = Heat gain due to lighting, estimated at 6.82 Btu/h ft 2 *This heat load should be calculated based on the specific building shell construction Supply air conditions: Tsa = Supply air temperature (cooling mode), 55 F Tsa = Supply air temperature (heating mode), 105 F cp = Specific heat of air at constant pressure, 0.24 Btu/lb F ρ = Density of air, lb/ft 3 Design Considerations Occupants 30 Room Set-Point (heating) 72 F Room Set-Point (cooling) 75 F Floor Area 576 ft 2 type of space. For overhead ventilation, a ventilation effectiveness (or zone air distribution effectiveness) (E z ) is assumed to be 1.0 (Table 6-2, ASHRAE Standard ). Determine the airflow rate to meet the cooling load. Determine the fresh airflow rate. Note: Some local codes may not allow the discount for Qoz or may have stricter requirements, and they should be used instead of this calculation (e.g. Title 24 in California). Assuming the air handling unit provides supply air composed of 25% outdoor air and 75% recirculated air, then the minimum primary air during occupancy is Q oz = 185 x 4 = 740 cfm. The total supply air volume for cooling is then the maximum value between Q cooling and Q oz which is 785 cfm. Determine the airflow rate to meet the heating load. The loads are broken down as follows: qoe = (30 People x 250 W) Btu/h = 7996 Btu/h ql = 576 ft 2 x 6.82 Btu/h = 3928 Btu/h qex, winter = (24 x x 14) ft 2 x 15.3 Btu/hft 2 = Btu/h (max heating) qex, summer = (24 x x 14) ft 2 x 7.5 Btu/hft 2 = 5040 Btu/h (max cooling) qtotal, summer = = Btu/h (max cooling) Note: For the heating airflow rate, the worst case is considered (at night, unoccupied). In case of an electric reheat coil, the required capacity is: Total maximum cooling load for this space (qtotal ) is 16,964 Btu/h, and approximately 29.5 Btu/h/ft². ASHRAE Standard requires 0.06 cfm/ft 2 outdoor airflow rate and 5 cfm/person outdoor airflow rate, R p, be delivered to this F-322 All Metric dimensions ( ) are soft conversion. Copyright Price Industries Limited 2014.
20 Parallel Fan Powered Terminal Selection Example Since a parallel FPU fan is selected by the maximum heating airflow volume, the terminal unit will need to be sized for an airflow volume of 289 cfm. The selection can be made by interpolation between performance values in a printed catalog, or preferably a terminal selection program is used. The selection program is more precise and typically the easier method. The image to the right shows the terminal with hot water coil as selected using the Price All-In-One (AIO) program. The terminal unit selected is the Price FDV V ECM FPU with 1 row HW coil. Selecting a unit with electric reheat is shown to the right. The unit selected is the Price FDV V ECM FPU with a 3.01 kw 480 volt, 3 phase, 2 step electric reheat coil. Copyright Price Industries Limited All Metric dimensions ( ) are soft conversion. F-323
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