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Installation Manual
IM 725
Group: Unit Ventilator
Part Number: 106506101
Date: January 2002
®
®
AAF
-HermanNelson
Classroom Unit Ventilators
Vertical Floor Models AVS, AVV, AVB, and AVR
Horizontal Ceiling Models AHF, AHB, AHV, and AHR
IMPORTANT!
Before beginning installation, please read this publication in its entirety.
Develop a thorough understanding before starting the installation procedure.
This manual is to be used by the installer as a guide. Each installation is unique, only general topics are covered.
The order in which topics are covered may not be those required for the actual installation.
©2002 AAF
®
-HermanNelson
®
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Table of Contents
Related Manuals for AAF HermanNelson IM 725
Summary of Contents for AAF HermanNelson IM 725
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Page 1: Installation Manual
This manual is to be used by the installer as a guide. Each installation is unique, only general topics are covered. The order in which topics are covered may not be those required for the actual installation. ©2002 AAF ®... -
Page 2: Table Of Contents
Table of Contents Unit Ventilator Split Systems Guidelines (DX) Systems ......23-25 Safety Information and Tools Required ............2 Pre-Installation Considerations ................. 2 Step 4 - Make Electrical Connections .............. 26 Unit Mounted MicroTech Direct Digital Controls (DDC) Components ..27-28 Wall Openings, Louvers, and VentiMatic Shutter .......... -
Page 3: Wall Openings, Louvers, And Ventimatic Shutter
Figure 1 – Typical Classroom Unit Ventilator Installation And Louver Details (see installation section for typical warnings and cautions) Wall Openings, Louvers, and VentiMatic Shutter Caulk Prior to unit installation, be sure that the exterior wall openings and louvers, as applicable, (top and 2 Sides) Lintels (By Others) are ready and in accordance with the job plans. - Page 4 Figure 3 – Horizontal and Vertical Blade Louvers, Without Flange Bird Screen On Side Toward Unit Outside Air Outside Air Horizontal Blade Louver Vertical Blade Louver Figure 4 – Horizontal and Vertical Blade Louvers, Without Flanges With Grille or With Flange Without Grille Vertical Louver with Flange, without Grille Flange...
- Page 5 Louver Installation With Typical Unit Configurations Unit Configuration Type AL Figure 6 -16 ⁄ " (422mm) Deep Unit with Open Pipe Tunnel & High Louver Figure 5 - The 16 ” (422mm) Deep Unit with Open Pipe Tunnel and Standard Application with Chased Wall Louver Location Gasket Seal...
- Page 6 " (556mm) Deep Partial Adapter Back Unit with Open Pipe Tunnel, Ducted with Top Intake Tunnel Gasket Seal Window Sash Piping “Goose Neck” Insulated Duct (By Others) Intake Louver Lintel Duct Collar (By AAF) (By Others) Piping Piping Gasket Seal Intake Louver Floor Line 1" Piping Not More (25mm) Than 12"...
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Page 7: Installing Louvers
Installing Louvers Typical Installation Methods terminate flush with the exterior of the building. Place a bead of caulk If the fresh air opening has not yet been made, see figures 5 through under the flashing to prevent moisture from wicking back to the unit. 12 for the recommended locations and the job-specific plans for the Do not caulk the joint between the louver and the flashing. -
Page 8: Installing The Ventimatic Shutter Assembly
Mortar or Caulking Materials Pre-Installation Considerations VentiMatic ™ Shutter Assembly In many installations, an AAF ® -HermanNelson ® VentiMatic Shutter When installing VentiMatic Shutter(s) on the wall louver, make sure Assembly is specified. See figure 17. This one-way shutter is a... -
Page 9: Installing The Av Unit Ventilator
Responsibility for its safe delivery If unit is damaged, file a claim with the carrier. Notify the local AAF ® was assumed by the carrier upon acceptance of the shipment. -
Page 10: Model Av Data Plate - Specific Information
Unit Ventilator (Floor Type) Data Plate - Specific Information Field Model 1. Product Category 8. Hand Orientation [Right (RH) Left (LH)] U = Unit Ventilator A = LH Both Coils (only w Controls by Others) B = RH Both Coils (only w Controls by Others) 2. -
Page 11: Step 2 - Position The Unit Ventilator
Table 2- Approximate Shipping Weights, Physical Data Models Shipping Weight Approx. Shipping Weight Filter Size Unit Length* Number AVS, AVV, lbs. (kg) lbs. (kg) in. (mm) in. (mm) Of Fans AVR, AVB "Units "Units 10 x 36.5 x 1 350 (168) 370 (163) 62 (1575) (254 x 927 x 25) -
Page 12: Step 3 - Make Piping Connections
Before setting the unit ventilator in place, if it is a cooling unit, check Figure 26 - Setting The Unit Ventilator In Place the condensate drain hand connection to be sure it is the same as the cooling coil hand of connection, and that it agrees with the drain stub- up. -
Page 13: In Water Systems
Figure 30 - Protect Components From Overheating Before Brazing Proper ventilation is required for brazing. When brazing, be sure to protect unit ventilator components from overheating damage (melting insulation, also damage to valves, wiring, electronics, sensors, etc.). Before filling, be sure to flush all piping adequately so that all debris is removed. -
Page 14: Coil Header, Locations
" M.P.T. fitting. 3. Steam/hot water connections may be same end as cooling coil connections, but they Dimensions Unit are recommended to be opposite end to facilitate piping. (Must be opposite end when Depth using AAF controls.) ⁄ ⁄ ⁄ ⁄ ⁄... -
Page 15: Heat/Cool
Coil Headers, Locations (Continued) Heat/Cool Figure 39 - Chilled Water and Steam Unit Figure 38 - Chilled Water and Hot Water Unit Figure 37 - Chilled/Hot Water (2-pipe) Unit Cooling Coils S, W, V, 5, 6, 7 Cooling Coils S, W, V, 5, 6, 7 Heating Coils 65, 66, 67 (Coils D, E, F, U, 1, 2, 3, 4) Heating Coils 68, 69, 78, 79 Cooling Dimensions Shown... -
Page 16: Reheat
Coil Headers, Locations (Continued) Reheat Figure 46 - Chilled Water and Steam Unit Figure 47 - Chilled Water and Electric Heating Figure 45 - Chilled Water and Hot Water Unit Cooling Coils S, W, V, 5, 6, 7 Heating Coils 68, 69, Cooling Coils V, S, W, 5, 6, 7 Cooling Coils S, W, V, 5, 6, 7 Heating Coils 65, 66, 67 78, 79... -
Page 17: Valves And Piping (Diagrams And Dimensions)
Valves and Piping Notes: The optional factory-supplied AAF ® -HermanNelson ® Control Valve(s) See label furnished on 2-way valve to determine direction of flow through the for water applications can be either 2-way or 3-way type, and is / are valve. -
Page 18: 2-Way And 3-Way Modulating Valves
Cooling – Chilled Water EOC Valve Piping The 3-way EOC CW valve is furnished normally closed to the coil. The 2-way EOC CW valve is furnished normally closed to the coil. When the valve is de-energized (off) the flow bypasses the coil. When the valve is de-energized (off) there is no flow through the coil. -
Page 19: End Of Cycle (In Steam Systems) Valve Piping
In Steam Systems: ® ® See Figures 64 and 65. Connect the 1/4" (6.35mm) vacuum breaker The optional factory-supplied AAF -HermanNelson Modulating Control Valve for steam applications is the 2-way type. It is shipped tube to the downstream return line. Make this connection downstream separately from the unit ventilator to preclude shipping damage, yet of the trap outlet. - Page 20 Union: Half attached to coil, half attached to valve Coil drain (AAF-HermanNelson) Modulating control valve (AAF-HermanNelson) Shutoff valve (Others) All piping, fittings and unions by others (not AAF-HermanNelson) except as Balancing shutoff valve(s) (Others) noted Supply Check valve and pressure equalizing line (AAF-HermanNelson)
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Page 21: Typical Coil Piping
⁄ ˝ Flare By ⁄ ˝ MPT Half-Union And Vacuum Breaker Tube ⁄ ˝ Flare (By AAF-HermanNelson) (By AAF-HermanNelson) Tee (By Others) Left End View Right End View Left Hand Steam Supply and Right Hand Steam Return (Shown) IM 725 (1-02) -
Page 22: Condensate Piping
Figure 73 - Piping Stub-Up Details, 6" End Panel Piping Stub-up Within 6" End Panel Piping Stub-up Within Cabinet End Panel 6" Application and Dimension Unit End Compartment Unit End Compartment Wall Line 11 ⁄ Wall Line ⁄ Left End Caution: Space available in left end Space available at left end of unit Left End of unit... -
Page 23: Unit Ventilator Split Systems Guidelines (Dx) Systems
UV fans must continue to run upon Low Refrigerant Temperature Unit Ventilator Split Systems Guidelines trip of T4 (evaporator air flow dissipates residual low coil surface The following provides basic guidelines that will provide proper temperatures - suction pressures raised, coil frosting reduced), system cooling and operation of an R-22 commercial DX/hot water see figure 79. - Page 24 Figure 77 - Insulate Bulb and Suction Line Piping Figure 78- Typical Split System Evacuation/Charging Set-up Outdoor Condensing Unit TXV (Thermal Expansion Valve) Outdoor Coil Compressor Outdoor Fan Insulate Bulb Supply (Liquid Line) (Reacts To Suction Line Service Valve Refrigerant Liquid Line Service Valve Temperature and Not Ambient)
- Page 25 132.2 337.3 ® ® be established. Filters are included in all units. AAF -HermanNelson single-use filters are standard on all but electric heat units, which come Table 19 —Superheat Range with permanent wire mesh filters. Permanent wire mesh and renewable Indoor Coil Air Inlet Temp.
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Page 26: Step 4 - Make Electrical Connections
2. Wire leads provided from unit ventilator electric connection box Figure 84 - Back View of Electric Connection Box to load side of unit power switch (switch provided by AAF). The junction box has 1"(25mm) and 2"(51mm) knockouts, located Molex Plug for Motor 10-1/2"(267mm) from right end of unit. -
Page 27: Unit Mounted Microtech
™ Unit Mounted Microtech Direct Digital Controls (DDC) Components This Drawing shows the location of the standard and optional AAF ® -HermanNelson ® MicroTech ™ control items. The following is a general description of these components. Damper Actuator(s): These devices position the outdoor and... - Page 28 Figure 88 - Typical Power and Control Field Wiring (See Unit Right Front Panel or Unit Wiring Diagram for Electrical / Control Electrical Hookups) Unit Wiring Terminations Fan/Radiation Interlock Left End Compartment Motor Speed Control Box - Right End Auxiliary Output Wiring Example Ground Main Power Supply Non Electric Heat Units...
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Page 29: Typical Wall Mounted Room Air Sensor
Typical Wall Mounted Room Air Sensor Mounting Procedure For Standard Electrical Box Installation Feed the cable from the electrical box. WARNING Strip ⁄ " of installation from the end of wires. ™ Connect wires to appropriate colored leads. See MicroTech 1. -
Page 30: Step 5 - Prepare Av Unit Ventilator For Start-Up
Figure 93 - Cabinet(s) Meeting Unit Ventilator Fit Front Alignment Bar Into Welded Notches Permitting Alignment Of Storage Accessories With The Unit Ventilator NOTICE Remove debris, heavy dust and dirt or any obstruction from the area in front of the return air intake grille at the floor,(approximately 3' - see shaded area) as this will affect unit performance. -
Page 31: Model Ah Ceiling Unit Installation
A forklift or other lifting device to install this product (See figure 97). Install this product in accordance with good engineering practices and workmanship, following these general instructions, plus the job- ® ® specific AAF -HermanNelson submittal drawings provided for Protective Material To Prevent specific dimensions, unit arrangements, controls and electrical details, Scratching and Denting of Unit. -
Page 32: Model Ah Data Plate - Specific Information
Unit Ventilator (Ceiling Type) Data Plate - Specific Information Field Model 1. Product Category 9. Controls U = Unit Ventilator 19 = MicroTech for Remote Wall Sensor (Sensor accessory required) 40 = DCV MicroTech for Remote Wall Sensor & Wall CO2 Sensor 2. -
Page 33: Typical Ceiling Ah Unit Air Arrangements
1. For all recessed applications (full or partial) it is necessary to carefully examine ® ® 2. Duct collars shipped loose for field installation not by AAF -HermanNelson both the inlet air and the discharge air physical locations. This must be done 3. -
Page 34: Pre-Installation Condsiderations
(19mm) ® ® 2. Duct collars shipped loose for field installation not by AAF -HermanNelson 3. It is important also to verify there is sufficient clearance to open and remove the bottom access panels and end panels for routine maintenance. -
Page 35: Duct System Design For Noise Control
Duct System Considerations Duct Design For Noise Control Proper acoustics is often a design requirement for schools. Most of the • Restrict use of high pressure drop flexible ducting. problems that are associated with HVAC generated sound can be • Size the outdoor air and return air ducts to handle 100% of the total avoided by properly selecting and locating the components of the cfm to accommodate economizer or morning warm-up operation. -
Page 36: Anchoring The Ceiling Unit
Figure 111 - Outdoor Air Intake and Insulated Duct Work NOTICE The following general suggestions are offered only to stress their importance; however, there are additional important factors that must be considered. Assistance in the design of Unit Ventilator ductwork can be found in the ASHRAE Handbook and SMACNA 5 Feet Intake Same Size As... -
Page 37: Filters
Control Valve: Install on Center (by AAF-HermanNelson) Coil Connection Vacuum Breaker Tube (by AAF-HermanNelson) Steam Trap (by Others) Steam Supply Steam Return Tee (by Others) 1/4" Flare by 1/2" MPT Half-Union and 1/ 4" Flare (by AAF-HermanNelson) IM 725 (1-02) -
Page 38: Remote Two Speed Control Switch
2. Wire leads provided from unit ventilator electric connection box 3. Mount remote speed switch in UL listed outlet box. Class 1 Wiring (Both Field to load side of unit power switch (switch provided by AAF). Supplied). The junction box has 1"(25mm) and 2"(51mm) knockouts, located 4. -
Page 39: Prepare Ah Ceiling Unit Ventilator For Start-Up
The check, test and start (Warranty Registration, Form 573882Y) must be completely filled out and returned to, AAF-HermanNelson Warranty Department within ten days in order to comply with the terms of the AAF-HermanNelson warranty. Forms should be returned to AAF- HermanNelson Warranty Department, P.O. - Page 40 The information in this bulletin supersedes and replaces previous [catalogs][bulletins] with regard to AAF -HermanNelson unit ventilator products. Illustrations cover the general appearance of AAF-HermanNelson unit ventilator products at the time of publication. AAF-HermanNelson reserves the right to make changes in design specifications and construction at any time without notice. ®...