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Related Manuals for Dunham-Bush CS3 Series
Summary of Contents for Dunham-Bush CS3 Series
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Page 2: Table Of Contents
TABLE OF CONTENTS SECTION PAGE NOMENCLATURE ..........................3 INTRODUCTION RECEIVING ................................4 STORAGE ................................4 LONG-TERM STORAGE ............................4 HANDLING AND RIGGING ..........................5 INSTALLATION GENERAL ................................6 FAN SYSTEM ............................... 7 LEVELING FAN DECK ASSEMBLY ........................7 CLEARANCE ................................ 7 GENERAL PIPING PARAMETERS- HOT WATER COILS ................. -
Page 3: Nomenclature
NOMENCLATURE Each unit nameplate will carry the unit model designation. The following gives a sample nomenclature of Dunham-Bush air-handlers AHD= Air Handler Double Low Pressure Unit Up Skinned To 3.5” TSP M= Medium Pressure Unit Over 3.5” TSP Forward Curved Wheel... -
Page 4: Introduction
We guarantee that all air-handlers are properly packaged. Cautions: Dunham-Bush Industries Sdn Bhd will not be responsible for any damages or loss parts in shipment or at the job site. Report any shipping damage to nearest Dunham-Bush office immediately. -
Page 5: Handling And Rigging
INTRODUCTION HANDLING AND RIGGING Proper handling and rigging procedure should be exercised to prevent damages. Some units are completely assembled and should be handled carefully to avoid dropping or jarring. Others are shipped in a few sections or completely knock-down. Care is required in handling the individual parts. -
Page 6: Installation
INSTALLATION GENERAL If your inspection indicates that the unit is ready for installation, move it to the desired location. Evaluate the job site by considering the following points: ( l.) Is the floor or foundation level enough to support the weight of the unit (the minimum foundation shall be 4 times the rotating mass of the fan and drives or about double of the units weight). -
Page 7: Fan System
INSTALLATION Fan System Figure 2 The fan section needs to be checked carefully before the unit is turned on. After removing transportation protections (only in case when spring shock absorbers are installed) one should check if there are any objects near the fan, which could be sucked into the impeller after it is turned on. -
Page 8: General Piping Parameters- Hot Water Coils
INSTALLATION GENERAL PIPING PARAMETERS - HOT WATER COILS The following precautions should be noted with regard to the piping layout for hot water coils: ( 1.) All coils should be connected to provide adequate venting and drainage. ( 2.) Thermometers are recommended to provide temperature readings when coils are balanced. ( 3.) a. -
Page 9: Steam Coils
INSTALLATION GENERAL PIPING PARAMETERS -STEAM COILS (MEDIUM OR HIGH PRESSURE SYSTEM) The following precautions should be noted with regard to the piping layout for steam coils: ( 1.) Return piping from coil to trap should be of at least the same size as the coil outlet connection. ( 2.) Steam piping and coil section should be supported independently. -
Page 10: Direct Expansion Coils
INSTALLATION GENERAL PIPING PARAMETERS- DIRECT EXPANSION COILS Each coil must be installed with the suction header on the entering air face of the coil and with the suction connection at the lower end. The orientation of the refrigerant distributor is not critical but the distributor tubes must not be kinked or bent in a non-uniform configuration. -
Page 11: Sheaves And Belts
INSTALLATION SHEAVES ALIGNMENT Factory-supplied drives are pre-aligned and tensioned. However, it is recommended that you check the belt tension and alignment before starting the unit. Always check the drive alignment after adjusting belt tension. To install sheaves on the fan or motor shaft, remove any rust-preventive coating on the shaft. -
Page 12: Belt Tension Inspection Guide
INSTALLATION BELT TENSION INSPECTION GUIDE When installing or replacing belts, always use a complete set of new belts. Mixing old and new belts will result in the premature wear or breakage of the newer belts. Correct tensioning of V-belts drive is carried out as follows, 1. -
Page 13: Condensate Drain Traps
INSTALLATION CONDENSATE DRAIN TRAPS The condensate drain trap piping must be properly designed to insure the removal of condensate (See Figure 9). FIGURE 9: TYPICAL CONDENSATE PIPING a.) Condensate Drain – Draw-through units 1. Fan Off 2. Fan Just Started 3. -
Page 14: Junction Box Condensate Prevention
INSTALLATION FIGURE 10: RECOMMENDED DISCHARGE DUCT ARRANGEMENT WHEN TURNS ARE REQUIRED Note : Make Turns In The Same Direction As Fan Rotation. FIGURE 11: DUCT CONNECTIONS JUNCTION BOX CONDENSATE PREVENTION When air handlers are installed outdoors in a high humidity environment or indoors where the apparatus room is used as a fresh air plenum, precautions must be taken to prevent condensation forming inside the junction box of the internally mounted motor. -
Page 15: Physical Dimension
INSTALLATION PHYSICAL DIMENSION 1.) VERTICAL TYPE SUPPLY NOTE 2 CHILLED WATER OUTLET CHILLED WATER INLET RETURN 1 1/2" [38] MBSP DRAIN 1" Casing - inch [mm] 2" Casing - inch [mm] Model 60 5/8[1540] 33.1/16[840] 33 1/16[840] 61[1550] 33 7/16[850] 33 7/16[850] 68 1/2[1740] 48 13/16[1240] 33 1/16[840]... - Page 16 INSTALLATION PHYSICAL DIMENSION 3.) DIMENSIONS FOR ACCESSORY SECTIONS FAN MODULE COIL MODULE EXTERNAL FACE AND BYPASS MODULE DISCHARGE PLENUM MODULE MIXING BOX MODULE ECONOMIZER MODULE ANGLE FILTER MODULE FLAT & BAG FILTER MODULE HEPA FILTER MODULE DIFFUSER MODULE SILENCER MODULE ACCESS MODULE Flat &...
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Page 17: Unit Shipping Weights (Kg)
INSTALLATION UNIT SHIPPING WEIGHTS (KG) Sections External Face & Flat & Coil Coil Hepa Angle Mixing Economizer Silencer Vertical Bypass Section Section Section Filter Filter Multizone Diffuser Section Filter Section Access Section (without Model (Horizontal (Short (Long Section Section Section (without Section (with... -
Page 18: Discharge Arrangements
INSTALLATION DISCHARGE ARRANGEMENTS A.) FAN SECTION ONLY Horizontal Front Top Inverted B.) SINGLE ZONE HORIZONTAL TYPE Horizontal Front Top Inverted C.) SINGLE ZONE VERTICAL TYPE Horizontal Front Horizontal Rear Top Inverted 1" Casing Forward Curved Blower Backward Inclined Airfoil Blower Model Max. -
Page 19: Water Inlet And Outlet Locations
INSTALLATION WATER INLET AND OUTLET LOCATIONS MODEL 12 TO 180 PREFILTER COIL OUTLET SUPPLY RETURN A - PIPE DIA. INLET B + (0.5 x PIPE DIA.) 1 1/2"MBSP CONDENSATE PIPE MODEL 210 TO 420 PREFILTER COIL OUTLET A - PIPE DIA. SUPPLY INLET 28 + PIPE DIA. - Page 20 INSTALLATION 1" Casing (Horizontal and Vertical Type) Model 1165 1356 1546 1546 Short Coil Long Coil 1 Row 2 Row 3 Row 4 Row 5 Row 6 Row 8 Row 2" Casing (Horizontal and Vertical Type) Model 1165 1356 1546 1546 1165 Short Coil...
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Page 21: Filter Arrangements
INSTALLATION FILTER ARRANGEMENTS 1.) FLAT FILTER (2” OR 4”), BAG/CARTRIDGE FILTER - 21 -... - Page 22 INSTALLATION 2.) ANGLE FILTER, FULL PANEL HEIGHT - 22 -...
- Page 23 INSTALLATION 3.) HEPA FILTER - 23 -...
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Page 24: Components Arrangement
(or order form) to the factory. Avoid field conversion of blower discharge pattern. If field conversion of the blower discharge pattern is required, contact factory or nearest Dunham-Bush representative and the field conversion should only carried out under the supervision of a factory authorised personnel. -
Page 25: Fans
For outdoor installation, applications in corrosive or hazardous atmosphere, other material options are available in Dunham-Bush. Special motor voltages and dual speed motors can be supplied. Frequency inverter drive for V.A.V. applications to meet the varying loads can also be offered as an option. -
Page 26: Unit Features And Accessories
UNIT FEATURES AND ACCESSORIES UNIT ASSEMBLY PLANNING The Dunham-Bush modular central station air-handling units are available for draw-through application. Draw through air-handling units are available for low, medium or high pressure single zone applications in horizontal or vertical arrangement, for ceiling or floor mounting. -
Page 27: Fan Bearings
UNIT FEATURES AND ACCESSORIES FAN BEARINGS Fan bearings are of the self-aligning ball bearings and selected for minimum 100,000 operating hours. VIBRATION ISOLATION Spring isolators are standard for unit with internally mounted motor to provide excellent vibration isolation. For unit with externally mounted motor and drive package, external spring isolators or neoprene Pads are provided to isolate complete air handling unit. -
Page 28: Operation
( 7.) Inlet and outlet chilled water pressure. ( 8.) Is unit vibrating excessively. ( 9.) Is the on/off design coil temperature being achieved by the units. Take necessary action to rectify any abnormal, operating conditions. Contact Dunham-Bush office for any uncertainties. PRESSURE DROPS CASING AND FILTERS ("WG) -
Page 29: Operating Limitation
OPERATION LIMITATION In order for the units to perform smoothly and be long lasting, the following operating limitation has to be strictly abided to: MAX MOTOR FRAME SIZE MODEL MAX CFM 1667 D90L D100L 2667 D100L D112M 3896 D100L D112M 4813 D112M D112M... -
Page 30: Maintenance
MAINTENANCE An air handling unit, as with any mechanical equipment, requires periodic maintenance. The following is a recommended "check list" to be used as a guide in establishing a maintenance program. PERIODIC INSPECTION ( 1.) FAN BEARING The fan bearing should be lubricated in accordance with manufacturer’s recommendation: a.) Fan equipped with deep grooved ball bearing inserted in rubber damper has sufficient high grade grease sealed in at the time of manufacture, there is no need for replenishment while in use at normal speed &... -
Page 31: Annual Inspection
MAINTENANCE ( 2.) Check the belts for proper tension and alignment at least once every six months. Proper belt tension depends on the center distance between pulleys and type of belt used. ( 3.) Check the pulleys and sheaves at least once every six months to make certain that set screws are properly tightened. -
Page 32: Troubleshooting Chart
TROUBLESHOOTING CHART SYMPTOM SOURCE PROBABLE CAUSE ♦ Impeller not center (check shaft clamp). Noise 1. Impeller hitting inlet ♦ Inlet ring damaged or not adjusted. ring ♦ Shaft loose in bearing (check locking collar). ♦ Impeller loose on shaft (check shaft clamp). ♦... - Page 33 TROUBLESHOOTING CHART SYMPTOM SOURCE PROBABLE CAUSE ♦ Bent. Noise 7. Shaft ♦ Undersized. May caused noise at impeller, bearings or sheave. ♦ Loose internal balance weights. ♦ Bearing alignment. ♦ Ductwork too small. 8. High air velocity ♦ Fan running too fast. ♦...
- Page 34 TROUBLESHOOTING CHART SYMPTOM SOURCE PROBABLE CAUSE ♦ Forward curve impeller installed backward. CFM low 1. Fan ♦ Fan running backward. ♦ Impeller not centered with inlet cones. ♦ Fan speed too slow. ♦ Actual system is more restrictive (more resistance to 2.
- Page 35 TROUBLESHOOTING CHART SYMPTOM SOURCE PROBABLE CAUSE ♦ Oversized ductwork. CFM high 1. System ♦ Access door open. ♦ System not balanced. Resistance less than specified. ♦ Registers or grilles not installed. ♦ Dampers set to bypass coils. ♦ Filter(s) not in place. ♦...
- Page 36 Products that perform...By people who care Corporate Head Office DUNHAM-BUSH HOLDING BHD (Formerly known as Dunham-Bush (Malaysia) Bhd) (129358-X) Lot 5755-6, Kidamai Industrial Park, Bukit Angkat 43000 Kajang, Selangor Darul Ehsan, Malaysia. Tel: 603-8924 9000 Fax: 603-8739 5020 E-Mail: info@dunham-bush.com.my www.dunham-bush.com...
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