Related Manuals for Daikin OAC 003G
Summary of Contents for Daikin OAC 003G
- Page 1 Installation and Maintenance Manual IM 777-7 Skyline™ Air Handler Group: Applied Air Systems Part Number: IM 777 Date: November 2011 Models OAC/OAH 003G – 090G © 2011 Daikin...
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Page 2: Table Of Contents
Wiring ........17 Daikin IM 777-7... -
Page 3: Introduction
021, 025, 030, 035, 040, 050, 065, 080, 085, 090 H = Motor downstream of fan array T = Motor behind twin fan housing Vintage of Daikin air handling unit Unit type/coil position B = Blow-through cooling coil location D = Draw-through cooling coil location... -
Page 4: Unit Storage
• Do not allow coverings to trap moisture on galvanized • Purge old grease from fan bearings while rotating the shaft surfaces. to distribute the new grease evenly and prevent bearing seal failure. • Correctly align and tension belts. See General Rules of Tensioning‚ page Daikin IM 777-7... -
Page 5: Mechanical Installation
Installation instructions for mounting units on a roof curb are provided in IM 770. For a copy, contact your local Daikin representative or visit www.DaikinApplied.com. Make provisions under the unit to Figure 2: Service Clearance for Electrical Power Devices divert any moisture from entering the building below. -
Page 6: Assembling Sections
3/8" x 1" Bolt and Nut e S p l c e J o n t g u d e Daikin IM 777-7... - Page 7 P l t e Figure 9: Internal Fastening S p l c e C o l l r t b e l g n e d l t o g k e t . V e w A Daikin IM 777-7...
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Page 8: Panels, Frame Channels, And Doors
Fan and filter sections are always provided with a service door on one side of the unit. If requested on order, doors can be provided on both sides of the unit. Optional service doors are available for most section types and are provided based on customer request. Daikin IM 777-7... -
Page 9: Injected-Foam Insulated Panels
â conduits de qualité industrielle. Ne pas se servir d’un chalumeau coupeur ni r g e exposer les pannequx à une flamme nue P l e n u m pour ne pas risquer de les endommager. Daikin IM 777-7... -
Page 10: Dampers And Hoods
205po/lb. Une plus grande rotation (ou torque) peut endommager l’équipement. When units are ordered with exhaust hoods and intake hoods adjacent to each other, install a field-supplied barrier to prevent recirculation of exhaust air into the intake openings. (Figure 18). Daikin IM 777-7... -
Page 11: Face And Bypass Section Mounting
If holes are cut into the pan for a piping passage, seal the holes connection and header. to prevent moisture leakage (Figure 19). • Follow recommendations of the control manufacturer regarding types, sizing, and installation of controls. Figure 19: Seal Holes for Piping—Curb Mounted Units Seal holes cut for piping Daikin IM 777-7... -
Page 12: Direct Expansion Coils
• Support piping independently of coils and provide adequate 35°F). piping flexibility. Stresses resulting from expansion of • Daikin strongly recommends 5JA, 8JA, 5RA and 8RA closely coupled piping can cause serious damage. coils. • Do not reduce pipe size at the coil return connection. Carry •... - Page 13 5RA, 8RA, or 5SA coils. Banked two high, individual trapping of each coil as shown is preferred. 12" min. Return main Full size of return conn. 5RA, 8RA, or 5SA coils. Installed Daikin IM 777-7...
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Page 14: Water Heating Coils
On both blow-through and draw-through units, the trap depth and the distance between the trap outlet and the drain pan outlet must be twice the static pressure in the drain pan section under normal operation so the trap remains sealed (Figure 22). Daikin IM 777-7... -
Page 15: Internal Isolation Assembly Adjustment
H Unit sizes 003 – 035 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 Unit sizes 040 – 090 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 6.75 Daikin IM 777-7... - Page 16 S h p p n g b r c k e t D e t Figure 27: Plenum Fan Typical Shipping Brackets Shipping hold-down nut and bolt Remove and discard - 4 places Shipping bracket - Remove and discard - 4 places Daikin IM 777-7...
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Page 17: Electrical Installation
For variable frequency drives, or other energy storing components that have been furnished and mounted by either Daikin, or by others, refer to the specific manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify capacitors have been discharged using an appropriate voltmeter. - Page 18 Hertz for 1800 RPM and slower motors. Motors that are 3600 RPM may be operated up to a maximum speed of 4000 RPM or 66.7 Hertz provided the fan is rated that high. Operation above 4000 RPM can damage motor bearings and is not recommended. Daikin IM 777-7...
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Page 19: Operation Guidelines
If multiple fans are supplied with a block off plate and it is installed on one of the fans, make sure to only start the fans without the block off plate. Do not start any fan that has the block off plate installed on it. Daikin IM 777-7... -
Page 20: Vfd Setup
24 1/2 (Class 1 & 2) 0.56 14.22 Note: 1. To obtain rated air performance, dimensional relationship must be held. 2. Adjust dimension C by loosening wheel hub setscrews, shifting wheel(s) axially as needed, and retightening setscrews Daikin IM 777-7... - Page 21 2.00 4.88 0.45 1.11 3.88 0.91 2.25 5.50 0.51 1.11 3.88 1.00 2.50 5.50 0.55 1.36 4.50 1.10 2.50 5.50 0.62 1.36 4.50 1.23 3.00 5.50 0.55 1.50 5.00 0.63 1.50 5.00 Figure 33: Fan Wheel Rotation Daikin IM 777-7...
- Page 22 Table 11: Wheel-to-Inlet Funnel Relationship—Inline Fans Wheel—funnel overlap 1/16 10.5 1.45 Size Overlap (in.) 19.0 2.63 0.375 7/16 29.0 4.01 0.438 42.0 5.81 0.562 92.0 12.72 0.625 0.688 0.750 0.812 0.875 1.000 1.125 1.250 1.375 Daikin IM 777-7...
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Page 23: Operating Limits
3909 3650 3650 2674 2403 2183 1981 1783 1620 1465 1329 1202 — — — Maximum rpm Class IlI — — 4000 4000 3887 3735 3409 3065 2780 2423 2182 1984 1759 1598 1447 1314 1178 1071 Daikin IM 777-7... -
Page 24: Fan Vibration Levels
An increase in levels is an indication of potential Bad V-belts; lumpy, or mismatched; belt tension too trouble. tight or too loose. Bad bearings, loose bearing hold-down bolts Motor imbalance Fan section not supported evenly on foundation Daikin IM 777-7... -
Page 25: Service And Maintenance
225°F (107°C) for intermittent operation. For a relubrication schedule, see Table 22. For applications that are not in the ranges of the table, contact Daikin. Motor Bearings Supply and return fans—Supply and return fan motors CAUTION should have grease added after every 2000 hours of operation. -
Page 26: Fan Drive
à vis lorsque l’unité fonctionne. Les pièces tight before starting drive. Check setscrews and belt mobiles et le niveau de succion peuvent causer des blessures tension after 24 hours service. personnelles graves ou même entraîner la mort. Daikin IM 777-7... -
Page 27: Lvp Variable Speed Sheaves
Determine this by accurately measuring the top width of the grooves. Insert key Daikin IM 777-7... -
Page 28: Mvp Variable Speed Sheaves
Seating torque Seating torque Seating torque Length (L) Seating torque (in–lbs) (in–lbs) (in–lbs) (in–lbs) (in–lbs) (in–lbs) (in–lbs) 1/4–20NC 12.5 3/16 5/16–11NC 25.4 13.8 3/8–16NC 45.4 24.2 1/4, 5/16 150, 250 1/2–13NC 1300 108.3 51.7 5/8–11NC 1225 102.1 Daikin IM 777-7... - Page 29 I n n e r L o c k n g - R n g E n d - F l a n g e ( D o N o t R e m o v e ) Daikin IM 777-7...
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Page 30: Fan Drive Belt Adjustment
(in) 0.0 to 3.5 3.6 to 4.4 A, AX 4.5 + 0.0 to 5.4 B, BX 5.5 to 7.6 7.7 + 11.0 0.0 to 8.5 8.6 TO 12.0 13.0 10.5 5V, 5VX 12.1 + 10.0 15.0 11.5 Daikin IM 777-7... -
Page 31: Front Load Filter Option
The tables also show a final pressure drop for Efficiency front loaded filters. Initial pressure drop Where a single filter gauge is used, the prefilters can be Final pressure drop removed to check the pressure drop of the final filters. Figure 41: Filter Gauge Daikin IM 777-7... -
Page 32: Coils
Some products have a higher freezing point in their natural state when mixed with water. Daikin Disconnect the fan sled from each of the corner mounts is not responsible for the freezing of coils. - Page 33 Carefully drill holes in the end panels of the unit. Coil Bulkhead Remove the brass plugs for the vents and drains on the connections. Slip the panel over the connections. Replace the brass plugs and panel fasteners. Coil Rests Daikin IM 777-7...
- Page 34 Caulk the seams between the coil casings and blockoffs. Connect all piping and install the brass plugs for the vents and drains located in the connections. Install the access panel. Daikin IM 777-7...
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Page 35: Parts
Parts Replacement Parts Parts When writing to Daikin for service or replacement parts, refer to the model number and serial number of the unit stamped on the serial plate attached to the unit. If replacement parts are required, mention the date of installation of the unit and date of failure, along with an explanation of the malfunctions and a description of the replacement parts required. -
Page 36: Service And Warranty Procedure
The return of the part does not constitute an order for Daikin Representative, go to www.DaikinApplied.com. replacement. Therefor, a purchase order must be entered through the nearest Daikin representative. The order should Warranty Return Material Procedure include part number, model number, and serial number of the unit involved. -
Page 37: Check, Test, And Start Procedure Form
To comply with the terms of Daikin Warranty, complete and return this form within 10 days to Daikin Warranty Department. Check, test, and start procedure for Daikin Air Handling Units with or without heat recovery. Job Name:________________________________________ Daikin S.O. No.: _________________ Daikin G.O. No.: _________________... - Page 38 Startup date:____________________________________ RETURN COMPLETED FORM WITHIN 10 DAYS OF START-UP TO: Daikin Warranty Department, 13600 Industrial Park Boulevard, Minneapolis, MN 55441 Please list any additional comments that could affect the operation of this unit; e.g., shipping damage, failed components, adverse installation applications, etc., on a separate sheet and attach to this form.
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Page 39: Quality Assurance Survey Report
Poor 10. How would you rate the overall quality of the product? Excellent Good Fair Poor 11. How does the quality of Daikin products rank in relation to competitive products? Excellent Good Fair Poor Comments: Please list any additional comments which could affect the operation of this unit; i.e., shipping damage, failed components, adverse installation applications, etc. - Page 40 Daikin Training and Development Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com and click on training, or call 540-248-9646 and ask for the Training Department.
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