Summary of Contents for Vision CAC 003G – 090G
- Page 1 Installation and Maintenance Manual IM 672-7 Vision™ Air Handler Group: Applied Air Systems Part Number: IM 672 Date: October 2011 Models CAC/CAH 003G – 090G © 2011 McQuay International...
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Page 2: Table Of Contents
Introduction ....... . . 3 Operation ....... . . 23 General Information . -
Page 3: Introduction
ASHRAE Handbook, the National Vision air handler units are constructed of galvanized or Electric Code, and other applicable standards. This equipment painted steel and are inspected thoroughly before leaving must be installed in accordance with regulations of authorities the factory. -
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
If component replacement is required, the top panel also can be removed. If necessary, the unit can be disassembled. Vision air handlers ship as separate sections, completely Maintain at least 54" of clearance in front of electrical power assembled, or in modules of assembled sections. The unit devices (starters, VFDs, disconnect switches and combination must be rigged as it ships from the factory. -
Page 6: Unit Leveling
Section Assembling Sections External Section-to-Section Mounting Vision air handling units can ship fully assembled or as separate shipping sections. Rig units that require field assembly of shipping sections into position first. Shipping sections are provided with a connection splice joint attached on the leaving air side of the shipping section. -
Page 7: Vertical Inverted Airflow Section Mounting
Lower the section that is to be positioned over the opening over the splice For certain Vision Plus units, use the provided section joint to seal the connection between the two sections. -
Page 8: Extended Coil Section Mounting
Mechanical Installation Extended Coil Section Mounting remove cotter pin and bolts from lifting channel and discard as seen in Figure The extended coil section is 6" wider than all other sections of the same unit size. The extension is always located on the coil Figure 11: Cotter Pin and Bolt Detail connection side of the unit. -
Page 9: Internal Section-To-Section Mounting
If the splice joint was bent during shipping or rigging, restore it to its original position (Figure 16). For Vision Plus units, ensure that the D-gasket is attached to the entering air side frame channel (Figure 15). If it has dislodged during shipping, restore to original location. -
Page 10: Ceiling Hung
When a unit is ceiling hung, support it with a base rail, angle iron, points along the base rails. or channel. The Vision air handler is not designed to be suspended from the top of the unit. Before hanging, rig and completely Figure 18: Ceiling Suspended w/o Base Rail—Unitized... -
Page 11: Panels, Frame Channels, And Doors
Mechanical Installation Panels, Frame Channels, and Doors Insert 1/2" socket and rotate 1/4 turn clockwise as shown in Figure 21. If the handle is on the left side of the door, rotate 1/4 turn counterclockwise. Panel Removal Rotate the door handle 1/4 turn clockwise and then 1/4 turn To remove a side or top panel, remove the flat head Torx 30 counterclockwise to release any internal pressure or fasteners along the sides of the panel. -
Page 12: Injected-Foam Insulated Panels
Injected-Foam Insulated Panels Figure 22: Cutting/Sealing Injected-Foam Insulated panels Seal completely with silicone Vision air handlers are furnished with double-wall, injected- sealant or duct seal compound foam insulated panels. Foam panels are stronger, more rigid, Cut hole from both sides of panel and lighter than panels with fiberglass insulation. -
Page 13: External Face And Bypass Duct Assembly (Sizes 040 To 090)
Mechanical Installation assemble the fan and coil section first. Use the steps below for External Face and Bypass Duct Assembly assembly. (Sizes 040 to 090) Place the vertical coil section in position. If an access When unit sizes 040 to 090 are ordered with external face and section is positioned downstream from the coil section and bypass, the bypass duct ships separately and must be attached not already assembled to the coil section, secure the two... -
Page 14: Multizone Assembly
Mechanical Installation Multizone Assembly Multizone Damper Assembly When a multizone unit is ordered with dampers, depending on The multizone section may ship completely assembled or it the multizone configuration and size, the damper assembly may ship in numerous pieces. Whether the section ships in a may ship separately (all horizontal and units with a total height single piece or multiple pieces depends on customer over 90"). - Page 15 Mechanical Installation Figure 25: Multizone Sections Assembly Zone damper assembly Upper unit—heating (and optional bypass) Joining collars Diffuser Cooling coil Cooling coil Figure 26: Multizone Damper Assembly McQuay IM 672-7...
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Page 16: Duct Connections
Mechanical Installation Duct Connections Figure 28: Bell Arms at 45° Angle to Vertical Center Z o n e d a m p e r l i n k a g e Use flexible connectors on the outlet and inlet duct connections of all units. -
Page 17: Mounting Actuators
Mechanical Installation Mounting Actuators Face and bypass dampers have a torque requirement of 10 in-lbs per square foot of damper face area. The installing contractor is responsible for the mounting of all field-installed actuators. No provisions are made for the Piping and Coils location of these actuators due to the number of options and arrangements available and the variety of specific applications. -
Page 18: Steam Coils
Mechanical Installation Steam Coils • Multiple coil installation • Individually trap each coil or group of coils that is con- Piping (see Figure trolled individually trapped. • All steam coils in units are pitched toward return connection. • Coils in series—use separate traps for each coil, or bank •... - Page 19 Mechanical Installation Figure 29: Piping Arrangements Control valve Float and modulating Check Valve Strainer Gate Valve thermostatic trap two position High Pressure (over 25 psi) 5TA, 8TA, or 5HA coils. Conden- 5GA or 8GA coils. Note that the sate is lifted to overhead return addition of a vacuum breaker to main permit the coil to drain during...
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Page 20: Water Heating Coils
Mechanical Installation Internal Isolation Assembly Water Heating Coils Adjustment CAUTION Improper installation, use, or maintenance of water heating On units with internally isolated fan and motor assemblies, the coils can cause equipment damage. assemblies are secured for shipment. Read and follow instructions carefully. Before Operating the Unit: ATTENTION Remove the shipping brackets and tie-down bolts (refer to... - Page 21 Mechanical Installation adjustment nut below the fan frame to lower or raise the fan Figure 33: Removing “Motor Beside” Shipping Brackets motor and frame assembly. Retighten the bolt on top of the Unit sizes 006 - 090 isolator assembly. Figure 31: Adjusting Large Spring Mount Assembly Adjusting bolt 6"...
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Page 22: Electrical Installation
Electrical Installation Electrical Installation Wiring • Connect the fan section metal frame to the building electrical ground. DANGER • A door electrical interlock is not provided as standard. Capacitor Hazardous Voltage! Failure to disconnect power • Thermal motor protection is external to the unit. Unless the and discharge capacitors before servicing will result in serious unit is provided with a variable frequency drive (VFD) or a injury or death. -
Page 23: Operation
Operation Operation Startup Checks 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 24: Fan Startup
Operation Fan Startup wheel(s) axial as needed, retightening setscrews. To obtain dimension B, loosen screw and washer fasteners around periphery of funnel(s), shifting funnel radially as required, re-torquing Start and run fan. Observe the rotation. If the fan operates fasteners. backward, reverse two legs of the three-phase supply power. - Page 25 Operation Table 5: Wheel-to-Inlet Funnel Relationship—13 to 36 Table 7: Setscrew Torque Specifications—Belt Drive Plenum Fan Plenum Fans Only Wheel-Funnel Parameters Torque (ft.-lb) Fan Size Setscrew Size Size Aluminum Steel 0.25 0.91 3.50 19.2 0.25 0.91 3.50 19.2 0.25 0.91 3.50 19.2 0.38...
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Page 26: Operating Limits
Operation Operating Limits Figure 39: Torque for FC Variable Inlet Vanes (in–lb) Do not exceed the operating limits in Table 10. 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. - Page 27 Operation Figure 41: Torque for FC Variable Inlet Vanes (in.–lb.) Figure 42: Torque for AF Variable Inlet Vanes (in.–lb.) 2000 1500 1000 Fan speed (rpm) Fan speed (rpm) Table 12: Operating Limits—Plenum Fans Fan operating limits Plenum fans Diameter 13.5 16.5 18.25 22.25...
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Page 28: Fan Vibration Levels
Operation Fan Vibration Levels Figure 43: Torque Requirements at 100% WOV for SWSI Plenum Fans with Nested Inlet Vane Each unit as shipped is trim balanced to operate smoothly. To provide satisfactory operation after shipping and installation, use the accepted industry guidelines for field balancing fans. Table Table 14: Vibration Levels Fan speed (rpm) -
Page 29: Maintenance
Maintenance Maintenance Periodic Maintenance Compatibility of grease is critical. Lubricatable bearings are supplied with grease fittings or zerks for ease of lubrication Check all moving parts for wear every six months. with hand or automatic grease guns. Always wipe the fitting and grease nozzle clean. -
Page 30: Fan Drive Adjustments
Maintenance VM/VP Variable Pitch Key Type Sheaves Table 18: Recommended Fan Lubrication Grease Charge Shaft Size (in) Shaft Size Grams Mounting: 1/2 to 3/4 0.03 20 mm 0.85 Mount all sheaves on the motor or driving shaft with the 7/8 to 1-3/16 0.10 25-30 mm 2.84... -
Page 31: Lvp Variable Speed Sheaves
Maintenance LVP Variable Speed Sheaves Before starting the drive, ensure that all keys are in place and all setscrews and all capscrews are tight. Check and Mounting: retighten all screws and retension belts after approximately 24 hours of service. Slide sheave on motor shaft so that the side of the sheave with setscrew is next to the motor when setscrew is in... -
Page 32: Mvp Variable Speed Sheaves
Maintenance MVP Variable Speed Sheaves Any pitch diameter can be obtained within the sheave range. One complete turn of the outer locking ring changes Mounting: the pitch diameter 0.233". Verify both driving and driven sheaves are in alignment and Do not open sheaves more than the following the shafts are parallel. -
Page 33: Fan Drive Belt
Maintenance Fan Drive Belt 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. •... -
Page 34: Front Load Filter Option
Maintenance Front Load Filter Option Table 21: 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 35: Winterizing Water Coils
Maintenance Winterizing Water Coils If any top panel fastens into the frame channel (when the frame channel is 24" or wider in direction of air flow), Coils can freeze due to air stratification or failure of outdoor remove the fasteners in the top panel before pulling out the air dampers and/or preheat controls. - Page 36 Maintenance Installing Single Coils screws on the other side. Remove the plate and trough before removing the coils. The coils cannot be removed Slide the coil through the opening in the coil section onto attached together. the bottom coil rests. Disconnect all piping and remove the brass plugs for the To prevent any air bypass around the coil, place coils up vents and drains located in the connections.
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Page 37: Parts
Parts Parts 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 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 38: Service And Warranty Procedure
Service and Warranty Procedure Service and Warranty Procedure Warranty issuance of credits. All parts must be returned to the appropriate McQuay facility, designated on the “Return Consult your local McQuay Representative for warranty Goods” tag. Transportation charges must be prepaid. details. -
Page 39: 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. Job Name:________________________________________ McQuay S.O. - Page 40 Check, Test, and Start Procedure Form V. CHILLED WATER COIL A. Pressure test okay? ................Yes B.
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Page 41: 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 42 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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