Subscribe to Our Youtube Channel
Related Manuals for McQuay Skyline OAC 003G
Summary of Contents for McQuay Skyline 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 McQuay International...
-
Page 2: Table Of Contents
Introduction ....... . . 3 Operation Guidelines ......19 General Information . -
Page 3: Introduction
Introduction General Information Receiving and Handling Introduction Carefully check items against the bills of lading to verify The system design and installation must follow accepted industry all crates and cartons have been received. Carefully practice as described in the ASHRAE Handbook, the National inspect all units for shipping damage. -
Page 4: Unit Storage
Introduction Unit Storage Belt driven fans: • Reduce belt tension by at least 50% or remove the belts. • Store on a level surface in a clean, dry location where Remove belts if they will be subjected to temperatures temperature can be controlled if possible. exceeding 85°... -
Page 5: Mechanical Installation
Mechanical Installation Service Clearances Rigging Mechanical Installation In addition to providing adequate space around the unit for Skyline air handlers ship as separate sections, completely piping coils and drains, access to at least one side of the unit is assembled, or in modules of assembled sections. The unit must always required to allow for regular service and routine be rigged as it ships from the factory. -
Page 6: Assembling Sections
Mechanical Installation If the unit is supported on rails they must be placed around the Pull sections together to fasten. Use straps and a ratchet entire perimeter. Additional Supports must be placed to help pull the sections together securely. Apply sealant perpendicular to airflow spanning the full width of the unit at to any gaps that may admit moisture. - Page 7 Mechanical Installation A length of “D” gasket is attached to each section Figure 10: D-Gasket Placement Detail (Skyline Plus Units Only) (Figure 7). This gasket MUST be installed to the unit base section. IMPORTANT The gasket is to be installed in an arc shape with the ends lower than the center, so that any moisture that may reach the gasket will be drained to the outside of the unit.
-
Page 8: Panels, Frame Channels, And Doors
Mechanical Installation Panels, Frame Channels, and Doors Fan Section Doors Note: Opening fan section doors requires using a 1/2" socket Panel Removal wrench (Figure 13), which satisfies ANSI standards and other codes that require the “use of tools” to access compartments containing moving parts or electrical To remove a side or top panel, remove the flat head Torx 30 wiring. -
Page 9: Injected-Foam Insulated Panels
Mechanical Installation Injected-Foam Insulated Panels Figure 14: Cutting/Sealing Injected-Foam Insulated Panels Seal completely with silicone Skyline air handlers now are furnished with double-wall, sealant or duct seal compound Cut hole from both sides of panel injected-foam insulated panels. Foam panels are stronger, more rigid, and lighter than panels with fiberglass insulation. -
Page 10: Dampers And Hoods
Mechanical Installation If the unit has a top mixing box or economizer damper or a top Figure 18: Field-Installed Barrier Between Hoods duct connection, field fabricate and install flashing to divert moisture from the connection. The flashing must lap over the standing seams of the top panels. -
Page 11: Face And Bypass Section Mounting
Mechanical Installation Face and Bypass Section Mounting For units with standard base rails, the vestibule is open to the coil section; therefore, seal all holes to prevent air leakage. Internal and external face and bypass sections are mounted Figure 20: Seal Holes for Piping—Standard Base Rail Units together using the instructions for horizontal components and do not require additional instruction. -
Page 12: Direct Expansion Coils
Mechanical Installation Direct Expansion Coils Traps Note: Do not place steam traps outdoors. • The coil distributor and suction connection extend through • Size traps in accordance with the manufacturers’ the end panel of the coil section. recommendations. Make sure the required pressure •... - Page 13 Mechanical Installation Figure 21: Piping Arrangements Control valve Float and modulating Check Valve Strainer Gate Valve thermostatic trap two position High Pressure (over 25 psi) Vacuum breaker Steam main Steam main 1/2" check valve Vacuum breaker 1/2" check valve Return main 1/4"...
-
Page 14: Water Heating Coils
Mechanical Installation Water Heating Coils Figure 22: Allow Adequate Distance Between Trap Outlet and Drain Pan Outlet CAUTION Pressure (P) Improper installation, use, or maintenance of water heating at the drain pan coils can cause equipment damage. Read and follow instructions carefully. -
Page 15: Internal Isolation Assembly Adjustment
Mechanical Installation Internal Isolation Assembly For models 040 through 090 with housed fans, the isolators Adjustment should be at equal height during fan operation (6"). Center the fan outlet in the outlet panel opening. If adjustment is required, loosen the cap screw on top of the isolator assembly. Turn the On units with internally isolated fan and motor assemblies, the adjustment nut below the fan frame to lower or raise the fan assemblies are secured for shipment. - Page 16 Mechanical Installation Figure 25: Removing “Motor Behind” Shipping Brackets Figure 26: Removing “Motor Beside” Shipping Brackets Unit sizes 006 - 090 Unit sizes 006 - 090 S h i p p i n g h o l d d o w n S h i p p i n g b r a c k e t r e m o v e a n d d i s c a r d r e m o v e a n d d i s c a r d...
-
Page 17: Electrical Installation
Electrical Installation Wiring Electrical Installation Figure 28: Electrical Conduit Location DANGER Capacitor hazardous voltage! Failure to disconnect power and discharge capacitors before servicing will result in serious injury or death. Disconnect all electric power (including remote disconnects) Fan Motor before servicing. Perform lockout/tagout procedures to ensure Junction Box that power can not be energized. - Page 18 Electrical Installation • Control wiring—access to the VFD is through the fan • For multiple fans in parallel, the VFD(s) are mounted inside cabinet access door for single fans. Provide shielded cable of the electrical enclosure, which is mounted on the exterior only as described in the VFD manual provided with the unit.
-
Page 19: Operation Guidelines
Operation Guidelines Startup Checks Operation Guidelines ATTENTION When performing startup and service, always take thorough Risques de dommages dans le moteur du ventilateur safety precautions. Only trained, experienced personnel should électrique. Si Ia température de l’air a proximité du perform these functions. ventilateurest élevée, le moteurdu ventilateur électrique peut chauffer et brûler. -
Page 20: Vfd Setup
Operation Guidelines Fan Wheel Alignment If multiple fans are supplied with isolation dampers, make sure the isolation dampers are fully open before Figure 29: Wheel-to-Inlet Tunnel Relationship—Airfoil Type starting the fans. Fan Wheels (Housed) E q u a l s p a c i n g VFD Setup a l l a r o u n d Fans ordered with VFDs that were factory installed are setup... - Page 21 Operation Guidelines Figure 31: Wheel-to-Inlet Funnel Relationship—13 to 36 Figure 32: Wheel-to-Inlet Funnel Relationship—40 to 60 Belt-Drive Plenum Fans Belt-Drive Plenum Fans Cross Section Reference Cross Section Reference EQUALLY SPACED AROUND DIAMETER FUNNEL END TO FAN WHEEL OPENING FROM FUNNEL END TO EQUALLY FANWHEEL OPENING END SPACED AROUND...
- Page 22 Operation Guidelines Setscrews on MPQ fan wheels must be installed using a Table 12: Wheel to Inlet Funnel Relationship - Direct Drive Class II fans calibrated torque wrench to the value listed below, ±5%.The Fan Size Overlap (in.) fasteners must be periodically checked to satisfy agency 0.25 requirements for components on rotating machinery.
-
Page 23: Operating Limits
Operation Guidelines Operating Limits Do not exceed the operating limits in Table 15 through Table 19. A fan wheel operated beyond the rpm and temperature limits shown can suffer permanent distortion or fracture. The resulting unbalance can cause severe unit vibration Table 15: Unit Sizes 003 to 035 Fan operating limits... -
Page 24: Fan Vibration Levels
Operation Guidelines Fan Vibration Levels Vibration Causes Wheel imbalance. Each unit as shipped is trim balanced to operate smoothly. To Dirt or debris on wheel blades. provide satisfactory operation after shipping and installation, use the accepted industry guidelines for field balancing fans. Loose set screws in wheel hub or bearing-to-shaft. -
Page 25: Service And Maintenance
Service and Maintenance Periodic Maintenance Fan Shaft Bearings Service and Maintenance Any good quality lithium or lithium complex base grease, Check all moving parts for wear every six months. using mineral oil, conforming to NLGI grade 2 consistency, Check bearing collar, sheave, and wheel hub setscrews, and an oil viscosity of 455-1135 SUS at 100°F (100-200 cSt at sheave capscrews, and bearing hold-down bolts for 40°C) may be used for relubrication. -
Page 26: Fan Drive
Service and Maintenance Upon completion of the air balance, replace the variable Table 23: Recommended Lubricants for Fan Shaft Ball pitched motor sheave with a properly sized, fixed sheave. A Bearings matching fixed sheave provides longer belt and bearing life NLGI and minimizes vibration. -
Page 27: Lvp Variable Speed Sheaves
Service and Maintenance Figure 35: VP Type Sheave Adjustment Tighten setscrews and capscrews Put on belts and adjust belt tension. Do not force belts over grooves. See Fan Drive Belt Adjustment‚ page Before starting the drive, ensure that all keys are in place and all setscrews and all capscrews are tight. -
Page 28: Mvp Variable Speed Sheaves
Service and Maintenance MVP Variable Speed Sheaves Any pitch diameter can be obtained within the sheave range. One complete turn of the outer locking ring Mounting changes the pitch diameter 0.233". Verify both driving and driven sheaves are in alignment Do not open sheaves more than the following: and the shafts are parallel. - Page 29 Service and Maintenance Figure 37: Sheave Adjustment Must be parallel Bearing Center lines must coincide Motor Adjustable Sheave Must be parallel Figure 38: Sheave Adjustment F i x e d ( 2 ) L o c k i n g A d j u s t a b l e F l a t h e a d S o c k e t S c r e w s C e n t e r - F l a n g e...
-
Page 30: Fan Drive Belt Adjustment
Service and Maintenance Fan Drive Belt Adjustment WARNING General Rules of Tensioning Moving belt and fan can cause severe personal injury or death. The ideal tension is the lowest tension at which the belt During installation and filter maintenance: does not slip under peak load conditions. Verify that the belt and fan guards on plenum fan units are •... -
Page 31: Front Load Filter Option
Service and Maintenance Front Load Filter Option Table 27: Filter Pressure Drops Bag filters—DriPak 2000 Front loaded filter options require that the filters be removed Efficiency and replaced from inside the unit. Rated velocity (fpm) To remove filters, rotate the wire clips. This releases both the Initial pressure drop .20–.26 .21–30 .34–.48 .50–.70... -
Page 32: Coils
Service and Maintenance Coils Removing and Replacing Components The coil must be clean to obtain maximum performance. Check once a year under normal operating conditions Access Doors and Panels‚ page 8 for instructions on and, if dirty, brush or vacuum clean. Use a chemical coil removing panels and opening fan access doors to remove or cleaner on multiple row coils. - Page 33 Service and Maintenance Removing the Fan Section Figure 42: Single Coil Top Installation/Removal Opposite For plenum fan assemblies, the entire fan cabinet may need to Connection connection be removed to replace the entire fan assembly depending on the length of the fan section. In some cases, the fan section is Coil not long enough for the assembly to fit out the side of the cabinet.
- Page 34 Service and Maintenance Removing Stacked Coils Removing and Installing Staggered Coils Note: Top and bottom stacked coils are held together with steel Staggered coils have two banks of coils positioned a few plate and screws on one side and drain trough and inches apart in the direction of airflow.
-
Page 35: 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 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
Defective material may not be returned without permission of Credit will be issued on customer's purchase order following authorized factory service personnel of McQuay International an inspection of the return part and upon determination that the in Minneapolis, Minnesota, (763) 553-5330. A “Return failure is due to faulty material or workmanship during the Goods”... -
Page 37: 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. Job Name:________________________________________ McQuay S.O. - Page 38 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.
-
Page 39: Quality Assurance Survey Report
Quality Assurance Survey Report Quality Assurance Survey Report Quality Assurance Survey Report To whom it may concern: Please review the items below upon receiving and installing our product. Mark N/A on any item that does not apply to the product. Job Name: _____________________________________________________ McQuay G.O. - Page 40 To find your local parts office, visit www.mcquay.com or call 800-37PARTS (800-377-2787). To find your local service office, visit www.mcquay.com or call 800-432-1342. This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.mcquay.com. © 2011 McQuay International • www.mcquay.com • 800-432-1342 11/11...
Need help?
Do you have a question about the Skyline OAC 003G and is the answer not in the manual?
Questions and answers