Ducted Fan Coil Unit FORM SSI - 42D (93) 42D

Transcription

1 Ducted Fan Coil Unit FORM SSI - 2D (9) 2D

2 Table of contents FeaturesBenefits Model number nomenclature Physical data and dimension Selection procedure Performance data 2 9 FeaturesBenefits SARMA AFARIN 2D series ducted fan coil units offer design and equipment location flexibility Choice of models, each available in sizes. Up to 0. in.wg duct static with some models. Features Benefits The 2D series ducted fan coil unit delivers quiet, dependable air conditioning in a wide range of capacities. Units providing air flow of 00 to 00 cfm are designed to economically fill multiroom application requirements in apartments, motels and office buildings. These easy-to-install units are available in horizontal or vertical models for cabinet or furred-in applications. Casings and frame are fabricated from tough heavy gage galvanized steel. A wide variety of factory-installed options (including coils, motors, filters, drain pans and electric strip heaters) can custom-tailor your units to the exact condition of your applications. Quiet,dependable performance All 2D series units are built to operate unobtrusively, with quiet motors and a low fan speed. Poly rol material -in.thick, absorbs operation sound in the fully insulated casing. Efficient operation Three-speed centrifugal fans are direct drive and forward curved for efficiency. High efficiency heat transfer surface and individual unit shutoff when unit is not in use are other energy-saving standard features. 2D quality reduce service and maintenance expenses. Condensate drain pan is heavy gage galvanized steel with closedcell foam insulation. Water never touches the pan, so corrosion is minimized and long, trouble-free life is assured. A drip lip (removable drain pan extension) is provided for field installation on ceiling models 2DA,DC, and DE when a motorized valve package is ordered. The drip lip also available as an accessory for use with other controls. Motor blower assembly can be easily removed from the unit for ease of service. Removing this assembly provides clear access to the entering air face of the coil, making coil cleaning a r e l a t i v e l y s i m p l e m a t t e r. Removable panels make access to components and connections easy. These rugged chillers are factory assembled, wired, and shipped under vacuum to the jobsite. Smaller sizes are shipped in a single package while larger models are shipped in two sections for easier rigging to either basement or rooftop locations. Model number nomenclature 2 D Series Ducted Fan Coil Unit Model A Furred-in ceiling model C Furred- in ceiling model with plenum D Vertical model with galvanized full casing E Ceiling model with galvanized full casing Design Series - A Size - cfm Coil B Row Standard L Row High Capacity 2 D A A 0 B R V 5 2DC,DE Return Supply 5 Bottom * Rear Arrangement Front Front Motor V 250 PSC Hand R Right L Left 2DD Return Supply Front Bottom Top Top *On 2DA, return is open 2

3 THE 2D SERIES 2DA Furred-in ceiling model for installation in the ceiling or over the closet. 2DD vertical model with galvanized casing. Commonly for closet Installation 2DC Furred-in ceiling model with Factory- installed insulated plenum. 2DE Ceiling model with galvanized casing.

4 PHYSICAL DATA AND DIMENSIONS 2DA FURRED-IN CEILING MODEL TOP VIEW (Sizes 0-0) FRONT VIEW TOP VIEW DOUBLE MOTOR MODEL (S 2-) SIDE VIEW UNIT NOM CFM Dimensions (in. ±⅛) RETURN A B C D E (in. OD) SUPPLY (in. OD) MIN RETURN AIR OPENING (sq ft) SHIPPING WT (lb) APPROX Notes:. R.H. unit shown. L.H. unit opposite. Coil connection locations are ± inches. 2. Sizes 09 and 0 have one motor, one blower. Sizes 2 through have 2 motors, 2 blowers.. standard -row coil shown. Other coil option dimensional data available on request.. Certified dimension drawings available on request. 5. Fan switch, wall plate not shown.. Galvanized Finish provided as standard. 5 LEGEND - Motor-Blower Assembly 2- Motor Junction Box - Auxiliary Drip Lip - Supply Duct Collar, inch 5- Mounting Holes (four. -in. diameter) have Rubber Grommets with -in. holes. - Return Connection. (See Table) - Supply Connection (See Table) - Drain Connection, -in. OD 9- Air Vent, -in. MPT

5 PHYSICAL DATA AND DIMENSIONS (CONT.) 2DC FURRED-IN CEILING MODEL WITH PLENUM UNIT NOM CFM TOP VIEW (Sizes 0-0) FRONT VIEW A Dimensions (in. ± ) B C D E F RETURN (in. OD) SUPPLY (in. OD) x x x x x x x 5 5 FILTER (in.) SIDE VIEW SHIPPING WT (lb) APPROX Notes:. R.H. unit shown. L.H. unit opposite. Coil connection locations are ± inches. 2. Sizes 09 and 0 have one motor, one blower. Sizes 2 through have 2 motors, 2 blowers.. Filter and Filter rack are standard.. Standard -row coil shown. Other coil option dimensional data available on request. 5. Certified dimension drawings available on request.. Fan switch, wall plate not shown.. Galvanized Finish provided as standard. TOP VIEW DOUBLE MOTOR MODEL (S 2-) LEGEND - Mounting Clips (Shipped Loose) 2- Motor Junction Box Opposite Piping - Insulted Return Air Plenum - Mounting Holes (four, -in. diameter) 5- Drain Connection, -in. OD - Auxiliary Drip Lip - Supply Duct Collar, inch - Return Connection, (See Table) 9- Supply Connection, (See Table) 0- Air Vent, -in. MPT - Electrical Connection KO 2- Access Panel - Filter (Optional) SIDE VIEW - Return Duct Collar, 2- inces 2 5

6 PHYSICAL DATA AND DIMENSIONS (CONT.) TOP VIEW 2DD VERTICAL MODEL WITH FULL CASING UNIT NOM CFM Dimensions (in. ± ) A B C FRONT VIEW D RETURN (in. OD) SUPPLY (in. OD) FILTER (in.) x 2 x 0 x 5 x 0 x 5 x 50 x 5 SHIPPING WT (lb) APPROX RIGHT SIDE VIEW LEGEND - Drain Connection, -in. OD 2- Return Air Opening - Supply Duct Connection - Front Access Panel 5- Filter, Throwaway - Optional -in. Legs - Return Connection, (See Table) - Supply Connection, (See Table) 9- Air Vent, -in. MPT 0- Motor Junction Box Notes:. R.H. unit shown. L.H. unit opposite. Coil connection locations are ± inches. 2. Standard -row coil shown. Other coil option dimensional data available on request.. Sizes 0 and 0 have one motor, one blower. Sizes 2 through have 2 motors, 2 blowers.. Supply and return connections terminate within unit when valves are factory installed. 5. Certified dimension drawings available on request.. Fan switch, wall plate not shown.. Galvanized Finish provided as standard.. Units with internal factory valve package have external connections located in triangular section above coil. 9. For bottom return (required for optional slide-in filter services from front) use dimension B minus in. 0. Consult SSI Co. for ducted front return air and external filter rack with one-in. duct collar and throwaway filters.. Units with electric heat require additional access on the side of unit for serving contractor box. 5

7 PHYSICAL DATA AND DIMENSIONS (CONT.) 2DE CEILING MODEL WITH FULL CASING UNIT NOM CFM A Dimensions (in. ± ) B C TOP VIEW RIGHT SIDE VIEW D E F RETURN (in. OD) SUPPLY (in. OD) FILTER (in.) x 9- x 2 x 2- x - x - x - x - SHIPPING WT (lb) APPROX Notes:. R.H. unit shown. L.H. unit opposite. Coil connection locations are ± inches. 2. Coil stub-out location data available on request.. Unit fabricated of galvanized steel.. Internal parts fabricated of galvanized Steel 5. Sizes 0 and 0 have one motor, one blower. Sizes 2 through have 2 motors, 2 blowers.. Units must have drain line pitched and trapped externally.. Certified dimension drawings available on request.. Fan switch, wall plate not shown. 9. Galvanized Finish provided as standard. 5 REAR PANEL ELEVATION LEGEND - Insulation, 2-in. Thick Glass Fiber 2- Coil, -row - Unit Mounting Channel (2), -gage; Mounting Slots, 2-in. x 2-in - Side Access Panels 5- Manual Air Vent - Coil Outlet (See Table) Copper Sweat Connection - Supply Air Duct Connection, inch - Coil Inlet, (see Table) Copper Sweat Connection 9- Return Air Duct Connection, 2-2 inch 0- Filter, Throwaway - Filter Removal 2- Bottom Access Panel - Drain, -in. OD - Drain Pan with Styrofoam Insualtion 5- Motor Junction Box - Auxiliary Drip Lip

8 SELECTION PROCEDURE I. Rate the performance at sea level for a 2DC0 unit with four-row coil at desired dry bulb and wet bulb conditions. Given: Assume cooling load at desired dry bulb 0 F and wet bulb at F conditions are as follows: Entering Water Temperature Water Flow External Static Pressure (at high fan speed) II. Determine the following design parameters from Performance Data tables. Enter the base cooling capacity, base sensible cooling capacity, and change in temperature found in the 2 D Cooling Capacity (by GPM) -Row Coil table on page 9. Locate the appropriate row for unit size 0 and 0 gpm. For Example: Base Total Capacity Base Sensible Total Capacity Change in Temperature III. Select the actual cfm from the Air Delivery table on page. V. Select the total airflow and sensible airflow correction factor from the Airflow Correction Factors table on page 2. (Interpolation may be required.) For Example: Total Airflow Sensible Airflow VI. Select the total elevation and sensible elevation correction factor from the Altitude Cooling Correction Factors table on page 2. Foe Example: Total elevation Sensible elevation VII. Calculate actual performance. For Example: Cfm Actual 0 cfm VIII. Calculate water pressure drop using Cv Factor by Coil and Unit Size table on page 2. IV. Divide cfm actual by cfm nominal to determine cfm ratio. For Example: Cv.9 Cfm Actual Cfm Ratio = GPM 2 Cfm Nominal Change in Pressure = ( ) (0.5 x Cv) For Example: Cfm Ratio = 0 cfm 00 cfm =.05 5 F 0.gpm 0.25 in. wg 2. MBtuh. MBtuh O 5. F Total Capacity Sensible Capacity Total Base Airflow = Total x x Correction Capacity Factor Total Elevation Correction Factor = 2. x.0 x.00 = 2.9 MBtuh Sensible Base Airflow = sensible x x Correction Capacity Factor Sensible Elevation Correction Factor =. x.0 x.00 =. MBtuh 0.0 = ( ) (0.5 x.9) = 5.2 ft of water 2

9 SC - Base Sensible Capacity from Base Cooling Capacities by Gpm charts b TC - Base Total Capacity from Base Cooling Capacities by Gpm charts b WB - Wet Bulb NOTE: all capacities are given in thousands of Btuh (MBtuh). T - Temperature Change DB - Dry Bulb EWT - Entering Water Temperature GPM - Gallons Per Minute 2D COOLING CAPACITY (by GPM) -ROW COIL 5 F DB F WB 5 F DB F WB 5 F DB F WB 0 F EWT 0 F EWT 0 F EWT 5 F EWT 5 F EWT 5 F EWT 50 F EWT 50 F EWT 50 F EWT SC b SC b SC b SC b SC b SC b SC b SC b SC b TC b TC b TC b TC b TC b TC b TC b TC b TC b GPM UNIT 2D COOLING CAPACITY (by GPM) -ROW COIL 5 F DB F WB 5 F DB F WB 5 F DB F WB 0 F EWT 0 F EWT 0 F EWT 5 F EWT 5 F EWT 5 F EWT 50 F EWT 50 F EWT 50 F EWT SC b SC b SC b SC b SC b SC b SC b SC b SC b TC b TC b TC b TC b TC b TC b TC b TC b TC b GPM UNIT LEGEND PERFORMANCE DATA 9

10 PERFORMANCE DATA (CONT.) LEGEND T - Temperature Change SCb - Base Sensible Capacity from Base Cooling Capacities by Gpm charts TCb - Base Total Capacity from Base Cooling Capacities by Gpm charts DB - Dry Bulb WB - Wet Bulb EWT - Entering Water Temperature GPM - Gallons Per Minute NOTE: all capacities are given in thousands of Btuh (MBtuh). 0

11 PERFORMANCE DATA (CONT.) MOTOR DATA VOLTS-PH-Hz FAN SPEED NOMINAL UNIT AMPS NOMINAL AMPS NOMINAL AMPS NOMINAL AMPS H M 25 W DDZ W DDZ W(2) DDZ W(2) DDZ L VOLTS-PH-Hz FAN SPEED NOMINAL MOTOR DATA (Cont.) AMPS UNIT NOMINAL AMPS NOMINAL AMPS H M 25 W(2) DDZ W(2) DDZ W(2) DDZ L. 2 AIR DELIVERY ( CFM ) FAN SPEED UNIT ROWS LOW MED HIGH HIGH EXTERNAL STATIC PRESSURE (IN.WG)

12 PERFORMANCE DATA (CONT.) ALTITUDE COOLING CORRECTION FACTORS ELEVATION (ft) Sea Level TOTAL HEAT SENSIBLE HEAT AIRFLOW CORRECTION FACTORS CFM RATIO (ActualBase) TOTAL (Ct) SENSIBLE (Cs) LEGEND CFM Cs Ct - Cubic Feet per Minute - Sensible Airflow Correction Factor - Total Airflow Correction Factor COIL TYPE 2DA, DC, DD, DE Row - Heat or Cool Row - Heat or Cool Cv FACTOR BY COIL AND UNIT UNIT

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