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Summary of Contents for McQuay Skyline OAC Series
- Page 1 Installation and Maintenance Manual IM 777-4 Group: Applied Air Systems Skyline Air Handler Part Number: IM 777 Date: May 2009 Models OAC/OAH 003G – 090G © 2009 McQuay International...
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Page 2: Table Of Contents
Contents Introduction ....... 3 Wiring....... . . 16 Operation Guidelines . -
Page 3: Introduction
G = Motor downstream of direct drive plenum fan 030, 035, 045, 055, 065, 080, 085, 090 T = Motor behind twin housed fans Vintage of McQuay Air Handling Unit Unit Type/Coil Position B = Blow-thru cooling coil location D = Draw-thru cooling coil location... -
Page 4: Mechanical Installation
Installation instructions for mounting units on a roof curb are provided in IM 770. For a copy, contact your local McQuay representative or visit Figure 2: Service Clearance for Electrical Power Devices www.mcquay.com. Make provisions under the unit to divert any moisture from entering the building below. -
Page 5: Assembling Sections
R e m o v a b l e U s e S p l i c e L i f t i n g B r a c k e t J o i n t a s a g u i d e McQuay IM 777-4... - Page 6 5 / 1 6 - 1 8 B o l t 5 / 1 6 - 1 8 N u t S p l i c e P l a t e McQuay IM 777-4...
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Page 7: Panels, Frame Channels, And Doors
Fan Section Doors View from inside door Note: Opening fan section doors requires using a 1/2" socket OPEN wrench, which satisfies ANSI standards and other codes McQuay IM 777-4... -
Page 8: Injected-Foam Insulated Panels
Ne pas se servir d’un chalumeau coupeur ni D i s c h a r g e exposer les pannequx à une flamme nue P l e n u m pour ne pas risquer de les endommager. McQuay IM 777-4... -
Page 9: 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 16). McQuay IM 777-4... -
Page 10: Face And Bypass Section Mounting
• Use care when piping the system, making sure all joints are tight and all lines are dry and free of foreign material. For Figure 18: Seal Holes for Piping—Standard Base Rail Units typical refrigerant piping, see condensing unit product manual. Seal holes cut for piping McQuay IM 777-4... -
Page 11: Steam Coils
35°F). Coils • McQuay strongly recommends 5JA, 8JA, 5RA and 8RA • Pitch all steam coils in units toward the return connection. coils. • Do not drip supply mains through the coil. - Page 12 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 McQuay IM 777-4...
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Page 13: 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 20). McQuay IM 777-4... -
Page 14: Internal Isolation Assembly Adjustment
H Unit sizes 003 – 035 3.75 3.75 4.25 4.25 3.75 4.25 4.25 3.75 4.25 6" 3.75 3.75 4.25 Unit sizes 040 – 090 6.00 6.75 6.75 6.50 6.75 6.75 6.50 6.75 6.75 6.00 6.75 6.75 McQuay IM 777-4... - Page 15 S h i p p i n g b r a c k e t D e t a i l A McQuay IM 777-4...
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Page 16: Electrical Installation
For variable frequency drives, Junction Box or other energy storing components that have been furnished and mounted by either McQuay, 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 17: Operation Guidelines
Check that the condensate drain is trapped. Rotate the shaft by hand to be sure it is free. Fan Startup: Start and run fan. Observe the rotation. If the fan operates backward, reverse two legs of the three-phase motor connections. McQuay IM 777-4... -
Page 18: Fan Wheel Alignment
Curved Type Fan Wheels 36.5 W h e e l 40.25 1.00 44.5 1.12 I n l e t I n l e t 1.25 F u n n e l F u n n e l 54.25 1.38 1.50 McQuay IM 777-4... -
Page 19: Operating Limits
2000 1700 1500 Maximum rpm Class Il 4335 3918 3457 2858 2427 2255 Figure 30: Torque for FC Variable Inlet Vanes (in–lb) Figure 31: Torque for AF Variable Inlet Vanes (in–lb) Fan speed (rpm) Fan speed (rpm) McQuay IM 777-4... - Page 20 1208 1072 Maximum rpm Class II 3409 3111 2796 2551 2294 2082 1846 1662 1510 1340 1216 1100 Twin fans Diameter 9 x 9 10.62 12.62 18.12 Maximum rpm 2575 2400 2000 1700 1400 1200 Maximum HP McQuay IM 777-4...
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Page 21: Fan Vibration Levels
Also similar faults in driven sheave. Bad V-belts; lumpy, or mismatched; belt tension too tight or too loose. Fan Speed (rpm) Bad bearings, loose bearing hold-down bolts Motor imbalance Fan section not supported evenly on foundation McQuay IM 777-4... -
Page 22: Service And Maintenance
225°F (107°C) for intermittent operation. For a relubrication schedule, see Table 14. For applications that are not in the ranges of the table, contact McQuay. CAUTION Bearing overheating potential. Can damage the equipment. CAUTION Do not overlubricate bearings. Use only a high grade mineral grease with a 200°F safe operating temperature. -
Page 23: Fan Drive
Fan rpm = motor rpm × Two Groove Measured diameter at fan sheave VM and VP Variable Pitch Key Type Sheaves Mounting Mount all sheaves on the motor or driving shaft with the setscrews toward the motor. McQuay IM 777-4... -
Page 24: Lvp Variable Speed Sheaves
Insert key and all setscrews and all capscrews are tight. Check and Tighten setscrews and capscrews retighten all screws and retension belts after approximately 24 hours of operation. Figure 36: LVP Type Sheave Adjustment Section A-A Section A-A McQuay IM 777-4... -
Page 25: 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 McQuay IM 777-4... -
Page 26: Fan Drive Belt
Keep belts free from foreign material that can cause equals belt span distance divided by 64. Determine the slippage. force applied while in this position. Compare this force to the values in Belt Deflection Force (per Browning® specifications)‚ page McQuay IM 777-4... - Page 27 5.8 to 8.6 250 to -4000 10.9 500-1749 10.2 15.2 4.4-6.7 1750-3000 13.2 3001-4000 5V, 5VX 500-1740 12.7 18.9 14.8 22.1 7.1-10.9 1741-3000 11.2 16.7 13.7 20.1 500-1740 15.5 23.4 17.1 25.5 11.8-16.0 1741-3000 14.6 21.8 16.8 25.0 McQuay IM 777-4...
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Page 28: Front Load Filter Option
Periodic cleaning is necessary to prevent this buildup from plugging the drain and causing the drain pan to overflow. Also, keep the drain pans clean to prevent the spread of disease. Cleaning should be performed by qualified personnel. McQuay IM 777-4... -
Page 29: Winterizing Water Coils
Replace the new fan, reconnect the shaft and bearings used. Some products have a higher freezing point in and put the fan assembly in the cabinet. their natural state when mixed with water. McQuay International is not responsible for the freezing of Replace panels and fasteners. - Page 30 Remove the screws attaching this plate to the coil. Once the fasteners holding the coil in place are removed, Coil pull out the coil from either side of the unit. Rests Install the coils in reverse order of removal. McQuay IM 777-4...
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Page 31: Parts
Parts Replacement Parts Parts When writing to McQuay 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... -
Page 32: Service And Warranty Procedure
The return of the part does not constitute an order for McQuay Representative, go to www.mcquay.com. replacement. Therefor, a purchase order must be entered through the nearest McQuay representative. The order should include part number, model number, and serial number of the Warranty Return Material Procedure unit involved. -
Page 33: Check, Test, And Start Procedure Form
Check, Test, and Start Procedure Form Check, Test, and Start Procedure Form To comply with the terms of McQuay Warranty, complete and return this form within 10 days to McQuay Warranty Department. Check, test, and start procedure for McQuay Air Handling Units with or without heat recovery. - Page 34 RETURN COMPLETED FORM WITHIN 10 DAYS OF START-UP TO: McQuay International 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 35: 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 McQuay 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 36 McQuay Training and Development Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority. For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or call 540-248-9646 and ask for the Training Department.
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I NEED TO KNOW THE LOCATION OF THE MIXED AIR TEMPERATURE SENSOR ON THE MOD - OAH021 FDAC