Related Manuals for McQuay Skyline IM 777-1
Summary of Contents for McQuay Skyline IM 777-1
- Page 1 Installation and Maintenance Manual IM 777-1 Group: Applied Air Part Number: IM 777 Date: June 2005 Skyline Air Handler Sizes 003–090 © 2005 McQuay International McQuay IM 782-1...
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Page 2: Table Of Contents
Replacement Parts ....... . 29 McQuay and MicroTech II are registered trademarks of McQuay International. Microsoft is a registered trademark of Microsoft Corporation. Windows is a trademark of Microsoft Corporation. Copyright © 2005 McQuay International. All rights reserved throughout the world. -
Page 3: General Information
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: Installation Guidelines
Before hoisting into position, test lift for stability and balance. Avoid twisting or uneven lifting of the unit. Figure 3: Unit and section rigging H e i g h t McQuay IM 777-1... -
Page 5: Curb Mounting And Unit Leveling
Installation instructions for mounting units on a roof curb are provided in IM 770. For a copy, contact your local McQuay representative or visit www.mcquay.com. Make provisions under the unit to divert any moisture from entering the building below. - Page 6 5 / 1 6 - 1 8 N u t 3 / 8 x 1 " B o l t a n d N u t S p l i c e P l a t e McQuay IM 777-1...
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Page 7: Access Doors And Panels
To prevent air leakage, tighten the door panels by adjusting Once a proper location is determined, drill a small pilot the jam nuts. hole completely through the panel. Then use a sharp hole saw or a saber saw and cut from each side of the panel. McQuay IM 777-1... -
Page 8: Field Mounting Junction Boxes And Other Components
Do NOT use self-tapping drill screws. They will not tighten nor secure properly and panel damage can occur. If larger, heavier components require mounting on unit panels, use through-bolts with flat washers through both outer and McQuay IM 777-1... -
Page 9: Dampers And Hoods
When dampers bypass a stacked or staggered coil, the dampers are not linked and require multiple actuators. Face and bypass dampers have a torque requirement of 10 in-lbs per square foot of damper face area. McQuay IM 777-1... -
Page 10: Piping Vestibules
• Use care when piping the system, making sure all joints are Seal holes tight and all lines are dry and free of foreign material. For cut for piping typical refrigerant piping, see condensing unit product manual. McQuay IM 777-1... -
Page 11: Steam Coils (See Figure
Connections extend through the coil section end panel. • Freezing conditions (entering air temperatures below 35°F). • When installing couplings, do not apply undue stress to the – McQuay strongly recommends 5JA, 8JA, 5RA and 8RA connection extending through unit panel. Use a backup coils. - Page 12 5RA, 8RA, or 5SA coils. Banked two high, individu 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 777-1...
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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. See Figure 19. McQuay IM 777-1... -
Page 14: Internal Isolation Assembly Adjustment
Turn the adjustment nut below the fan frame to lower or raise the fan motor and frame assembly. Retighten the cap screw on top of the isolator assembly. D e t a i l A McQuay IM 777-1... -
Page 15: Electrical Installation
évacuera l’eau vers la gouttière extérieure. Tous les trous percés au bas de l’unité doivent pénétrer la panne d’égouttement. S’il y a des trous dans la panne d’égouttement, les sceller pour empêcher les fuites d’eau. McQuay IM 777-1... -
Page 16: Operation Guidelines
électriques en vigueur. ADVERTISSEMENT Les dommages dus à des attaches installées de façon inappropriée représentent un démarrage inadéquat et un abus d’équipement. Ceci n’est pas couvert par la garantie. McQuay IM 777-1... -
Page 17: Fan Wheel Alignment
36.50 12.78 0.38 9.65 40.25 14.31 0.50 12.70 Notes: 1. To obtain rated air performance, dimensional relationship must be held. 2. To obtain dimension A, loosen setscrews in wheel hub(s), shifting wheel(s) axially as needed, and retightening setscrews. McQuay IM 777-1... - Page 18 .880 44.5 .940 Table 6: Bearing collar and wheel hub set screw torque 1.000 set screw Minimum torque 54.25 1.060 Diameter (in) ft/lbs kg/m. 1.120 1/16 10.5 1.45 19.0 2.63 7/16 29.0 4.01 42.0 5.81 92.0 12.72 McQuay IM 777-1...
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Page 19: Operating Limits
Maximum rpm Class I 1010 Maximum rpm Class Il 1281 1178 1011 Airfoil—housed Diameter 22.25 24.5 36.5 Maximum rpm Class I 2077 1875 1691 1479 1328 1209 1073 Maximum rpm Class Il 2703 2413 2199 1928 1730 1579 1401 McQuay IM 777-1... - Page 20 3887 3735 3409 3065 2780 2423 2182 1984 1756 1598 1447 1314 1178 1071 Figure 31: Torque requirements at 100% WOV for SWSI plenum fans with NESTED inlet vane 5000 4000 3000 2000 1000 Fan Speed (rpm) McQuay IM 777-1...
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Page 21: Fan Vibration Levels
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 777-1... -
Page 22: Service And Maintenance
Replace the adjustable sheaves with fixed sheaves. With the electrical power disconnected, locked and tagged out, measure the diameter of the V-belt outer surface where it McQuay IM 777-1... -
Page 23: Vm And Vp Variable Pitch Key Type Sheaves
If flange and locking ring have been removed, when replacing them make sure that the inner and outer flanges are open from the closed position by the same amount as McQuay IM 777-1... -
Page 24: Mvp Variable Speed Sheaves
Do not open sheaves more than 8 turns. • Do not force belts over grooves. See “Fan Drive Belt Adjustment” on page 24. Figure 33: LVP type sheave adjustment Section A-A Section A-A McQuay IM 777-1... - Page 25 I n n e r L o c k i n g - R i n g E n d - F l a n g e ( D o N o t R e m o v e ) McQuay IM 777-1...
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Page 26: Fan Drive Belt Adjustment
• La surface des planchers doit être sec et libre de toute trace d'huile et où de graisse. McQuay IM 777-1... -
Page 27: Front Load Filter Option
F i l t e r F i l t e r F r a m e P r e f i l t e r R o t a t e W i r e C l i p s McQuay IM 777-1... -
Page 28: Maintaining The Coil
Note – Carefully read instructions for mixing antifreeze solution Initial pressure drop used. Some products have a higher freezing point in their natural state when mixed with water. McQuay Final pressure drop International is not responsible for the freezing of Pleated panel filters coils. -
Page 29: Removing And Replacing The Coil
Slip the panel over the connections. plate on the coils. Replace the brass plugs and panel fasteners. Caulk the mounting surface of the drain trough and install the drain trough on the coils. Caulk the seams between the coil casings and blockoffs. McQuay IM 777-1... - Page 30 Remove the screws attaching this plate to the coil. Once the fasteners holding the coil in place are removed, pull out the coil from either side of the unit. Install the coils in reverse order of removal. McQuay IM 777-1...
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Page 31: Warranty
Replacement 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... - Page 32 McQuay IM 777-1...
- Page 33 McQuay IM 777-1...
- Page 34 McQuay IM 777-1...
- 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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