model azs, azq hermannelson classroom unit ventilator...7 fasteners - azs/azq 24, 30 8 fasteners -...

Installation & Maintenance Data IM 503-1

Group: Unit Ventilator

Part Number: 106101101

Date: June 1999

Model AZS, AZQ HermanNelson® Classroom Unit Ventilator

©1999 AAF-HermanNelson IM 503-1 (Rev. 6/99)

HermanNelson®

Receiving ShipmentBefore signing the freight bill, be certain that all items havebeen received and that there is no visible damage. Note anyshortages and any damage on all copies of the freight bill.Each Model AZS, AZQ unit has been carefully inspected andoperated at the factory to verify proper performance. It hasbeen packed in a sturdy carton, was checked by the carrierduring loading for shipment, and should arrive in perfectcondition. However, if there is damage or any shortages, thepurchaser is responsible for filing the necessary claims withthe carrier. Concealed damage which was not discovereduntil after unloading should be reported to the carrier within 15days after receipt. To help avoid concealed damage, the airconditioners must be shipped, handled and stored right-sideup. A formal claim for any shortage or damage must be filedwith the carrier within nine (9) months after delivery.See Table 1 for unit weights and dimensions. Forklift typevehicles may be used to unload and move the unit. Whenusing a forklift, it is important that the unit remain banded toits skid and be lifted only from the end designated on thecarton. See Figure A. Forks on forklift should be a minimum of36" long. Move only one unit at a time. Do not drop unit.

StorageIf an air conditioner must be stored prior to installation, find aclean, dry, protected, preferably heated area for storage untilthe equipment is needed. Keep within the carton duringstorage or handling.

/ IM 503-1

Preliminary InstallationThe location and installation of each Model AZS, AZQ unitshould be carefully arranged to ensure convenient serviceaccess for maintenance and, if necessary, removal of the unit.If the unit has been in storage in an unheated area, care mustbe taken that the refrigerant circuit has had time to reachproper ambient temperature before attempting operation.The unit consists of two major sections: (1) the unit proper and(2) the wall sleeve. The wall sleeve contains the unit mainpower disconnect switch located in the wall sleeve junctionbox. All field connections are made inside the wall sleevejunction box (see page 8).The Model AZS, AZQ unit is designed to be installed throughan outside wall. Installation will require that the wall sleeve beremoved from the unit and installed before the unit is installed.See "Uncrating Unit" section.On many jobs, the louver and wall sleeve are shipped aheadof the unit itself. Installation instructions for these compo-nents are shipped with the individual components, as well asbeing included in this publication.

IMPORTANT:1. Move only one unit at a time.2. Do not drop unit.3. Store in a clean and dry environment.4. Lift only from designated end.5. May be stacked maximum of 2 high.6. To remove unit from skid, follow instructions

under "Uncrating Unit" on page 3.

NOTE: All dimensions are approximate only and are subject to changewithout notice. Refer to approved submittal prints for rough-in detailsand construction purposes and for recommended wall opening size.

UNIT UNITA B

SHIP WALL SLEEVEMODEL DEPTH WT., LB. HEIGHT WIDTH

AZS-24, 3028 103 31 885 28 84

AZQ-24, 30

AZS-36, 4228 103 31 975 28 96

AZQ-36, 42

AZS-48, 5428 115 31 1075 28 108

AZS-48, 54

Table 1. (See note below)

Wall Sleeve

Figure A.

A

B

39"

Figure B.

Wall Opening PreparationAn opening in the outside wall is required to accommodate thewall sleeve and louver. The wall opening must be of sufficientsize to allow proper, yet snug, fit of the louver and will dependon the type of wall. If the louver is to be installed in a masonrywall, there should also be a lintel to support the wall above thewall sleeve and louver. The opening should be sleeved toprevent moisture from seeping into the wall interior. Refer toapproved submittal prints for recommended wall openingsize.

Remodeling Existing BuildingsIf the Model AZS, AZQ unit is to be installed in an existingclassroom, an opening must be cut in the outside wall toaccommodate the wall sleeve and louver. This is accom-plished as follows: First, the outside of the wall is cut with a carborundum or othersuitable blade as shown in Figure B. This opening should beslightly larger than the size of the louver supplied with the unit.

Figure D.

Figure E.

Figure C.

Next, the inside of the wall is cut as shown in Figure C. If anyportion of the wall sleeve is to be recessed into the wall, theopening must be large enough to accommodate the wallsleeve (see Table 1, page 2). It is also possible to have a wallopening smaller than the wall sleeve; in which case, the sleevewill be nonrecessed and all of the unit will remain in the room.Other variations are also possible such as dual louvers, etc.

The inside wall is then knocked out in the area cut for the wallsleeve as shown in Figure D. If the wall consists of concreteblock with brick (or other) veneer, and the louver opening issmaller than the opening the wall sleeve (which is to berecessed), be careful not to knock out more veneer than isnecessary.

The completed opening is shown in Figure E. After the open-ing is finished, a lintel must be installed above the opening inmasonry walls to support the remaining block and brick.

New BuildingsIn new construction, if any portion of the wall sleeve is to berecessed into the wall, the opening must be large enough toaccommodate the wall sleeve (see Table 1, page 2). Forsmaller wall openings the wall sleeve will be nonrecessed andall of the unit will project into the room. In all cases the bottomof the wall opening must be at the same height as the floor line.A lintel must be installed above the opening in masonry wallsto support the block and brick.

IM 503-1 /

Uncrating Unit (Figure A)The unit should be moved to the location at which it is to beinstalled before uncrating. Check tagging on unit carton toconfirm that the unit is correct for the location. The carton isimprinted with the AAF-HermanNelson trademark which isthe "front" or room side of the unit. The end of the cartonmarked "Truck from this end" should be on the right-hand sidewhen facing the front of the carton.

Wall Sleeve InstallationGeneral — The wall sleeve must be installed before the unitcan be placed. The wall sleeve measures 85", 96" or 108"wide by 28" high and may be recessed into the wall up to113⁄8" in depth.* Consult the approved AAF submittal draw-ings for the job to determine the proper amount of recess,if any, and recommended wall opening size.

The wall sleeve is attached to the unit chassis (weld studs)using 4-nuts and washers, see figure 1.

The AAF wall sleeve and louver design is based on a "wetsleeve" concept. In brief, this means the design accommo-dates the penetration of some moisture into the rear sectionof the wall sleeve with the provision being made for contain-ment and disposal of this moisture to the outdoors.

It is necessary for that portion of the opening between thewall sleeve and the louver to be completely enclosed by theinstaller to prevent air and water leaks into the building.

*Unit may also be installed with full 28˝ deep cabinet projecting into the room.

Recessed and Nonrecessed ApplicationsThe installing contractor shall do the following:1. Make sure there is a masonry lintel supporting the wall

above any masonry opening.2. Frame and seal air- and watertight all openings not en-

closed by the wall sleeve.3. Refer to relevant figures for details of required sealing:

Figure 2 for all applications.Figures 3 and 4 for recessed wall sleeve applications.Figures 5 and 6 for nonrecessed wall sleeve applications.

4. Seal watertight both ends and top of wall sleeve to buildingat rear flange of wall sleeve.

5. Seal watertight bottom of wall sleeve at rear "D" seal tobuilding and pitch toward louver bottom channel. Alsofasten cross channel to floor through holes with fasteners(by others). See Figure 2.

/ IM 503-1

Lower crated unit from dolly (if used), but do not drop.Remove external carton by lifting off, and save this carton. Toremove unit from the skid, remove fasteners at each end whichfasten the unit to the skid and slide the front of the unit off of theskid. Tip unit forward until it is possible to slide skid out fromunder the unit. Gently lower the rear of the unit to the floor.After the unit has been installed, cut out the rear of the cartonand replace it over the unit until all construction has beencompleted. This will prevent the unit from being scratched ordamaged by other workers finishing the area.

Remove the protective covering from the interior of thethree front panels to prevent block return air openings. Checkfor concealed shipping damage.

Figure 2. Cross Section Detail of Bottom ofWall Sleeve & Intakeaaaaa

*Unit may also be installed with the full 28" deep cabinet projecting into the room.

Fasten cross channel to floorthru 1⁄4" holes with appropriatefasteners (by others.)7 fasteners - AZS/AZQ 24, 308 fasteners - AZS/AZQ 36, 429 fasteners - AZS/AZQ 44, 48, 54

Seal both ends and top ofWall Sleeve to building,watertight at rear flange.

A "D" shaped seal isprovided at the bottomrear of the Wall Sleeveto provide a watertightseal to the bottom ofthe unit when installed.

Bottom channelof Louver

Seal watertight bottom of Wall Sleeve at rear "D" sealto building and pitch toward bottom channel of louveras shown.

IMPORTANT: Opening under Louver must befree of foreign material for water removal.

Bottom of Wall SleeveCross Channel

3⁄16"

6. The louver must be installed with the drain notcheslocated at the bottom and the bird screen located onthe unit side. Openings between notches must be freeof mortar or other foreign material for water removal. Referto IM 449 for specific details regarding louver installation.

7. Apply rubber stripping or sealant material (by others)across full length of wall sleeve splitters.

8. If the louver does not butt up against the wall sleeve:a. Fabricate a horizontal air splitter from galvanized

steel, redwood or some other suitable weather resis-tant material. The width of the air splitters is determinedby the width of the wall opening. The depth of the airsplitters is determined by the distance between thelouver horizontal splitter and the wall sleeve splitters.

b. The horizontal air splitters should have a 1" diameterdrain hole approximately 6" from each end.

c. Install the horizontal air splitters by fastening to thewall sleeve splitters.

d. Apply rubber stripping or sealant material (byothers) across full length of horizontal air splittersto seal against louver.

9. Permanently seal any remaining air leaks so that, whenfinished:a. There is an airtight separation between the discharge

air and the return air of the condenser fan;b. There are no air leaks around the perimeter of the wall

sleeve where it adjoins the wall.

Recessed Applications (See Figures 3 and 4)The installing contractor shall do the following:1. Place the wall sleeve into the wall opening and recess it

the amount shown on the approved AAF submittal draw-ings.

2. Level the wall sleeve horizontally and plumb the wall sleevevertically.

3. Fasten the wall sleeve securely in place using fastenersthrough the two knockouts provided on each end.

4. Caulk or seal any space between the wall sleeve and thewall on both the room side and the outdoor side.

Figure 1. Chassis Wall Sleeve

CAUTION: Sleeves furnished for use with optional heated rear drain will have an electric cord installed alongthe length of the wall sleeve splitter. Avoid screw penetration or drilling into this cord wheninstalling the horizontal air splitter. (Model AZS, AZQ Only)

Wall Sleeve Splitter(s)(See Caution Above)

Seal Horizontal Air Splitter(s)to Louver. (By Others)

By Others. Wall Sleeve must be sealedwatertight at bottom at location shown.Refer to cross section detail of bottomof Wall Sleeve and Louver.(Figure 2.)

By Others. Seal HorizontalAir Splitters to building atboth ends.

By Others. Wall Sleeve mustbe sealed watertight at top andboth ends at location shown. By Others. Louver must be sealed

watertight at top and both ends.

By Others. Building must be sealed between WallSleeve and under Louver for water run-off. Pitchtoward Louver.

"D" SealBy Others. Seal both ends ofopening between Wall Sleeveand Louver.

3⁄16" Under Intake must be free for water run-off. INTAKE MUSTSTAND ON EMBOSSED FEET LOCATED ON BOTTOM.

IMPORTANT NOTE:By Others: Attach Horizontal Air Splitters to Wall SleeveSplitters as shown. Splitters to have 1" dia. drain holeapprox. 6" from each end.

Figure 3. Rear View of Recessed Wall Sleeve With Horizontal Air Splitters

Figure 4. Rear View of Recessed Wall Sleeve Without Horizontal Air Splitters.


"D" Seal




By Others. Louver must be sealedwatertight at top and both ends.

IMPORTANT NOTE: By Others. SealLouver to Wall Sleeve at top and bot-tom Wall Sleeve Splitters, and ends.


By Others. Wall Sleeve mustbe sealed watertight at top andboth ends at location shown.

Condenser discharge

Condenser inlet

Outdoor air inlet

IM 503-1 /

CAUTION: Sleeves furnished for use with optional heated rear drain will have an electric cord installed alongthe length of the wall sleeve splitter. Avoid screw penetration or drilling into this cord wheninstalling the horizontal air splitter. (Model AZS, AZQ Only)


Seal Horizontal Air Splitter(s)to Louver.





"D" Seal

By Others. Seal both ends ofopening between Wall Sleeveand Louver.


IMPORTANT NOTE:By Others: Attach Horizontal Air Splitters to Wall SleeveSplitters as shown. Splitters to have 1" dia. drain holeapprox. 6" from each end.

Figure 5. Rear View of Nonrecessed Wall Sleeve With Horizontal Air Splitters

By Others. Apply sealant (by others) to bottom edge of unit (notshown) and to top flange and both end flanges of wall sleeve (asshown.) This must provide a watertight seal to the wall of thebuilding.

Condenser discharge

Condenser inlet

Outdoor air inlet

Figure 6. Rear View of Nonrecessed Wall Sleeve Without Horizontal Air Splitters

By Others. Seal both ends of openingbetween Wall Sleeve and Louver. "D" Seal

By Others. Wall Sleeve must be sealed watertight at bottom at locationshown. Refer to cross section detail of bottom of Wall Sleeve and Louver.(Figure 2.)

By Others. Building must be sealed between Wall Sleeve and underLouver for water run-off. Pitch toward Louver.



IMPORTANT NOTE: By Others. SealLouver to Wall Sleeve at top, WallSleeve Splitters and ends.Wall Sleeve Splitter(s)

By Others. Apply sealant (by others) to bottom edge of unit (notshown) and to top flange and both end flanges of wall sleeve (asshown.) This must provide a watertight seal to the wall of thebuilding.

/ IM 503-1

Louver InstallationThe standard louver is an aluminum, vertical, divided bladedesign complete with bird screen. This louver is also availablewith flanges and/or with a heavy-duty exterior lattice grille.

1. Figure 7 shows a detail of a typical louver. Before installa-tion, carefully examine the louver and note the location ofthe bird screen and the notches (drain holes). The louvermust be installed with the notches at the bottom and thebird screen toward the unit.

2. Measure the opening to be sure there is adequate clearancefor the louver around the sides. Observe the opening inrelation to the wall sleeve and unit. For proper unit operation,the louver must be centered left to right and top to bottomto the wall sleeve. If the louver is of such a dimension that itextends above, below, or beyond the wall sleeve, then theseareas must be blocked off airtight (see Figure 8).

3. If the wall sleeve does not extend into the wall far enoughto meet the louver, field fabricated splitter(s) must beprovided. The splitter(s) need to extend far enough toengage the louver in order to form a proper seal.

4. Check to see if the horizontal divider on the louver is the

Typical Wall Louver

IM 503-1 /

same height as the horizontal splitter of the wall sleeve.The louver consists of a frame, which must be permanentlymounted in the wall, a demountable center louver sectionto allow service access to the rear of the unit. To install thelouver in the opening, the demountable center sectionmust be in place. This will insure that the frame remainssquare during installation.

6. Before installing the louver in the opening, place a heavybead of caulk along the top and two sides of the frame thatcome in contact with the walls of the opening. Use aflexible, waterproof caulk such as silicone.

7. Once the louver has been placed in the opening, furthermechanical fastening may be desired or required. Fastenin a manner appropriate to the installation. Care must betaken if fasteners are to be placed in the frame. If this isnecessary, remove the demountable center section byremoving the screws that hold it in place. Drill holes in thedesired locations and fasten with flat head screws. Be surethese screws do not interfere with the reinstallation of thedemountable section. Shims must be placed between theframe and the wall so it won't be distorted. After the framehas been satisfactorily fastened, reinstall the demountablecenter section and secure with fasteners provided.Once the frame and louver assembly has been installed,run a bead of caulk around the outside perimeter of theframe to seal it watertight. Caution: Do not plug the weepholes in the bottom of the louver.

Louvers With Flanges1. If the louver is supplied with flanges, follow steps 1 through

6 above. Additionally, place a bead of caulk on the insideof the top and side flanges that come in contact with thebuilding facade. Do not caulk the bottom flange.

2. Place the louver in the opening and push it tight against thebuilding. Fasten it to the exterior of the building usingappropriate fasteners for the installation.

3. Seal the top and two sides with waterproof caulk to makeit weathertight. Do not seal the bottom flange. To do somay trap water behind the flange.

Figure 7.

Figure 8.Shaded area of louver mustbe blocked off & made air-and watertight, by install-ing contractor.

Exaggerated oversizelouver or wall opening.

Unit WallSleeve

Nonrecessed Applications (See Figures 5 and 6)The installing contractor shall check the following beforeproceeding:

The wall behind the unit should be smooth and plumb.The seals on the rear of the unit will take up the small

irregularities of normal masonry construction.Furring strips must be installed on irregular walls or walls

with mullions in order to provide a flush surface for the unitto seal against.

Any moldings at the floor/wall line should be omittedbehind the unit.

The installing contractor shall do the following:1. Apply sealant (by others) to bottom edge at rear of unit top

and both end flanges on rear of wall sleeve to providewatertight seal to interior wall of building.

2. Level the wall sleeve horizontally, and plumb the wallsleeve vertically.

3. Fasten the wall sleeve securely in place by:a. Securing it to the floor through the two (2) 3⁄8" diameter

holes in the turned out bottom flanges of the wallsleeve at each end, and/or:

b. Securing it to the wall through the two (2) 3⁄8"diameter holes in the turned out vertical flanges of thewall sleeve at each end.

4. a. Panel wall applications should have the wall opening sleevedto prevent moisture from seeping into the wall interior.

b. If the panel wall is less than 21⁄4" thick, the wall louvershould be installed flush to the interior wall and beallowed to extend to the outside as required.

5. Seals on rear of unit must be compressed to provide awatertight seal after installation is complete.

BottomFlange

LouverBlade

Optional FlangesSplitter Lines Up With

Wall Sleeve Splitter

Optional Factory MountedExterior Grille

Mechanical Fasteners (Number RequiredVaries With Size of Louver)

DemountableLouver Section

InformationLabels

FrameFactory Mounted Bird Screen

Drain NotchAt Bottom

Bird ScreenFasteners

Detail of Notches(Drain Holes)

Electrical ConnectionsAll field wiring should be in accordance with the NationalElectric Code and applicable local codes.Refer to the wiring diagram furnished with the unit to deter-mine electrical connections required.Refer to Figure 9 for stub-up locations. Refer to pages 12through 14 for main power connections and field wired con-trols, if any. Check nameplate to verify power supply is correct. Whenever the electric stub-up is brought in through the

Stub-up through side must be confined to thisarea: cut in field. Opening must be carefullyprepared and gasketed for air tightness.

Control receptacle with plug-in disconnect (AAF-HermanNelson). Leads are provided for wire nutconnection to all remote controls.

5/8" x 35/8" opening (for main power wiring from wallsleeve to chassis). Field connection by others.

Wall Sleeve Junction Box

Safety Precaution: Reverse this cover when unit isremoved from wall sleeve to cover opening in theend of switch box.

SW1-Main Power Nonfused “On-Off” Switch (AAF-HermanNelson)

.875" Dia. Knockouts (3)2.5/1.75" Dia. Knockout

3.0/2.0" Dia. Knockout

Wall Sleeve

Conduit (by others)

Rear edge of wall sleeve

1"

9"

5"

16"

Right EndOf Unit

Wall Sleeve

Conduit (by others)

Whenever the electric stub-up is brought inthrough the floor within the confines of the wallsleeve, and any portion of the wall sleeve isrecessed into the wall, the conduit must be flushwith the floor to permit installation of the wallsleeve. Sufficient space must be left around theconduit to permit the attachment of continuingconduit after the wall sleeve is installed. Forconcrete slabs, it is recommended that this beaccomplished either by sleeving the conduit or byrecessing a junction box into the slab.

Stub-up frombottom must beconfined in this area.

SW1-Main Power Nonfused “On-Off” Switch (AAF-HermanNelson)

.875" Dia. Knockouts (3)

Safety Precaution: Reverse this cover when unit isremoved from wall sleeve to cover opening in theend of switch box.

5/8" x 35/8" opening (for main power wiring from wallsleeve to chassis). Field connection by others.

Wall Sleeve Junction Box



Control receptacle with plug-in disconnect (AAF-HermanNelson). Leads are provided for wire nutconnection to all remote controls.

5" 51/2" 1/2"

61/4"

Right EndOf Unit

Rear edge of wall sleeve

floor within the confines of the wall sleeve and any portion ofthe wall sleeve is recessed into the wall, the conduit must beflush with the floor to permit installation of the wall sleeve.Sufficient space must be left around the conduit to permit theattachment of continuing conduit after the wall sleeve isinstalled. For concrete slabs, it is recommended that this beaccomplished either by sleeving the conduit or by recessinga junction box into the slab.

Figure 9. Wall Sleeve With Electric Stub-up From Bottom or Side.

/ IM 503-1

Note: These are general instructions. Refer to the AAF-HermanNelson submittal drawings for specific dimensions,unit arrangement, stub-up locations, recommended wallopening size, etc.

Unit Placement

Before Moving Unit Up To Wall Opening:1. Confirm unit is correct for the location.2. Complete the installation of the wall sleeve and air intake

louver in accordance with the instructions on pages 4through 9.

3. For nonrecessed applications, inspect the field appliedelastic tape to make sure it will seal tightly to prevent airleaks after unit is installed.

4. Check room air and condenser fan bearings to be sure theyare secure (Figures 10 and 12).

5. Check room air and condenser fan shaft coupling set-screws to be sure they are tightened securely to bothmotor shaft and fan shaft.

6. Rotate the room air and condenser fans to be sure theyrotate freely and quietly.

7 Check fan wheel setscrews for tightness.8. Remove any debris from inside the unit.

Setting the Unit:Slide the unit up to the wall sleeve aligning the four threadedstuds (Figure 13) on the wall sleeve with the holes on each endof the unit. Sliding of the unit to the wall can be made easierwith the assistance of Caster Kit P/N - 105629001. A piece ofcardboard placed under the unit will make this job easier andprevent marring the floor. (Do not leave cardboard under unitafter installation.) The wall sleeve mounting studs should slidethrough the holes in the unit. Place the washers over thethreaded studs and tighten the mounting nuts. Do not drawthe nuts up as tight as possible as they may distort the unit andloosen the caulking and wall sleeve from their position. If anadapter collar is used, make sure that the unit, adapter collarand wall sleeve all line up properly.

Defrost Condenser Drain PipingIt is strongly recommended that the condensate from theheating defrost cycle be disposed of into a building con-densate drain. See Figure 14, page 10 for details. If a buildingcondensate drain is not used, and the drain line is exposed tofreezing temperatures, adequate freeze protection must befurnished.

OilingDo not attempt to operate the unit fans until the room air fanshaft bearing has been oiled. Use a high grade SAE 20 or 30nondetergent oil. A few drops are sufficient. Do not over oil.Refer to Figure 10 for oil point. The fan motor does not requireoiling until after one year of operation (Figure 11). Condenser motor and fan shaft bearings are permanentlylubricated.

IM 503-1 /

Caution:

Failure to follow these instructions may rack theunit which can cause the fan or unit to vibratenoisily on startup and appear to be in need of fanbalancing. For quiet, smooth unit operation it isimportant that the unit be square, level and thebase solidly supported by the floor, using shimswhere necessary due to uneven construction inorder to prevent distortion of the cabinet. It isessential to keep unit level.

ROOM AIR FANSHAFT BEARING

OIL CUP

CONDENSERFAN SHAFTBEARING

Figure 10.

Figure 11.

Figure 12.

Oil Here

Figure 13.

Piping Stub-up Within Cabinet

Unit End Compartment

Piping Stub-up Within 6" End Panel End Panel 6"Application and Dimension

Piping Stub-up Details, 6" End Panel

Wall Line 111⁄2

103⁄4

Left Endof unit(Less end panel)

Caution: Space available in left endcompartment for piping stub-up.Stub-up including unions and shutoffvalves must disconnect below floorline for unit installation and removal.

1

Space available at left end of unitfor piping stub-up when 6" endpanel is used.

Left End of unit(Less end panel)

Wall Line

4

1A

Unit End Compartment

B

6

All dimensions in inches

Piping Within Unit End Compartment Piping Outside Unit End Compartment

F&BP With End-of-Cycle Valve F&BP With End-of-Cycle Valve

3-Way Modulating Valve Control 3-Way Modulating Valve Control

Hot Water Coil Piping Arrangements (see Note 12)

/ IM 503-1

Coil PipingHeating valve actuators should be mounted in an uprightposition above the centerline of the valve body and should bepiped normally open to the coil. Modulating valve actuatorsfor hot water applications may be positioned above the valvebody a maximum of 75° from the vertical. For steam applica-tions only, mount the modulating valve actuator above thevalve body at 45° from the vertical. Two-position, end-of-cycle (EOC) valves used with face and bypass damper con-trolled units may be positioned above the valve body amaximum of 85° from the vertical. All control valves areshipped loose to insure that no shipping damage occurs to the

piping or the coil connection stub from the weight of the valveand to provide the installing contractor with maximum flexibil-ity in making the field piping connections. Refer to AAF-HermanNelson factory instruction sheet shipped with the unitfor port orientation and a piping schematic. Control valvesmust be installed on the units in which they are shipped.Indiscriminate mixing of valves among units can result invalves not properly sized for the desired flow rate. Controlvalves should be installed so that there is 2" minimum clear-ance to remove the actuator from the valve body. As a futureservice consideration, provide unions for removal of the unitcoil and/or the control valve.

Notes:Three-way control valve (AAF-HermanNelson)Coil air vent (AAF-HermanNelson)Coil drain (AAF-HermanNelson)Shutoff valve (Others)Balancing shutoff valve(s) (Others)SupplyReturnUnions (Others)—Must disconect below floor lineTwo-way, two-posiiton valve (AAF-HermanNelson)

2

1

3

6

4

5

7

8

9

Union: Half attached to coil, half attached to valveModulating control valve (AAF-HermanNelson)All piping, fittings and unions by others (not AAF-HermanNelson) except as notedCheck valve and pressure equalizing line (AAF-HermanNelson)Float and thermostaic steam trap (Others)Supply and return coil connection and stub-up unions byothers

15

14

13

12

11

10

IM 503-1 /

Steam Coil Piping Arrangements (see Note 12)

Piping Within Unit End Compartment Piping Outside Unit End Compartment

F&BP With End-of-Cycle Valve F&BP With End-of-Cycle Valve

2-Way Modulating Valve Control

/ IM 503-1

Pre-installation Checklist¨ Lintel installed above wall louver to support masonry

wall

¨ Bird screen on wall louver facing toward room interior

¨ Embossments of wall louver at bottom and free fordrainage.

¨ Wall sleeved to prevent moisture seepage into wall

¨ Free opening under wall louver clear for water run-out

¨ Wall louver anchored and sealed against air and waterleaks

¨ Horizontal air splitter between wall sleeve and louver(if required)

¨ Wall sleeve anchored and sealed against air or water leaks

¨ Shipping brace on condenser fan shaft removed

¨ Condenser fan shaft coupling and bearing secure

¨ Room air in shaft coupling and bearing secure

¨ All fan wheels rotate freely and quietly

¨ Any debris removed from inside unit

¨ Unit identified and correct for location

¨ Access space provided for maintenance, service andunit removal

¨ Shipping carton saved for use later to protect unit

¨ Check unit nameplate to verify that power supply iscorrect

Post-installation Checklist¨ Unit securely fastened to wall sleeve

¨ Electrical hook-up complete; power, control, wallthermostat (if applicable) in accordance with unit wiringdiagrams.

¨ Air filter clean and in place

¨ All access and end panels in place and protectivecovering removed

¨ Room air fan shaft bearing oiled

¨ Unit square and level and running smoothly and quietly

¨ No air infiltration

¨ Paint nicks and scratches touched up (as required)

¨ Shipping carton replaced over unit for protection

IM 503-1 /

Control Receptacle InWall Sleeve JunctionBox Last Unit

Control ReceptacleIn Wall SleeveJunction BoxFirst Unit

Control ReceptacleIn Wall SleeveJunction BoxAdditional Unit

BLU

PNK

GRY

Chart 1

Wire Mfg.Mfg.’s Wire No.0-300V 301-600V

Belden or Equivalent 2-Wire 8761 9341

Main Power Supply(Omit L3 For SinglePhase Applications)

Network Wiring(Network Units Only)

Attach Wires From Unit To Unit In DaisyChain Fashion. In Any Order, See Chart 2For Correct Wire/Line Voltage Combination.Shields Are To Be Grounded In Each Unit.

Master/Slave(Stand-Alone Units Only)

Attach Wires From Unit To Unit In DaisyChain Fashion, In Any Order. See Chart 1For Correct Wire/Line Voltage Combination.Shields Are To Be Grounded In Each Unit.

Chart 2

Wire Mfg.Mfg.’s Wire No.

0-300V 301-600V

Belden or Equivalent 2-Wire 8761 9341

Control Receptacle InWall Sleeve JunctionBox Last Unit

Control ReceptacleIn Wall SleeveJunction BoxFirst Unit

Control ReceptacleIn Wall SleeveJunction BoxAdditional Unit

To LocalMaster Panel

For FurtherInformationSee Appropriate FieldWiring Detail

BLU

PNK

GRY

BLU

PNK

GRY

BLU

PNK

GRY

YEL36

37

BRN

BLK

WHT

RED

GRNORG

BLU

PNK

GRY

YEL36

37

BRN

BLK

WHT

RED

GRNORG

BLU

PNK

GRY

Day/Night Changeover Control(Stand-Alone Units Only)

ControlReceptacleIn Wall SleeveJunction Box

Day/NightChangeover(4VA Inrush)Energize ToPut Unit InNightMode

Ventilation Lockout Control(Stand-Alone Units Only)


Vent Lockout(4VA Inrush)EnergizeTo Close TheOutdoor Air Damper

Exhaust Fan Interlock


Exhaust Fan Interlock(4VA Inrush)Energize To OpenOutdoor AirDamper

Pneumatic Day/Night ChangeoverControl(Stand-Alone Units Only)


Pneumatic/ElectricSwitch.Close ContactsTo Put Unit InNight Mode. (24VAC,Class II, 1 AMP)

YEL

36

37

BRN

BLK

WHT

RED

GRN

ORGBLU

PNK

GRY

YEL

36

37

BRN

BLK

WHT

RED

GRN

ORGBLU

PNK

GRY

YEL

36

37

BRN

BLK

WHT

RED

GRN

ORGBLU

PNK

GRY

YEL

36

37

BRN

BLK

WHT

RED

GRN

ORGBLU

PNK

GRY

Factory WiringFurnishedOnly As Required

Control ReceptacleGround

Field ConnectionBy Others (Not AAF-HermanNelson)To The Load Side Of SW-1.[(2) Wires Per Pole If UnitHas Electric Heat]

Field Wiring

SW-1 - - Main Power “On - Off” Switch

YEL

36

37

BRN

BLK

WHT

RED

GRN

ORG

BLU

PNK

GRY

904A

910

911

L1

L2

L3SW-1

HumidistatWiring

1

2

3

Wall Sleeve Junction Box - Right End

Field Wiring Controls, Maximum Outdoor Air Unit

IM 503-1 /

Wall Mounted Room Air Sensors

ControlReceptaclein wall sleevejunction box




SensorTerminalBoard

SensorTerminalBoard

SensorTerminalBoard

SensorTerminalBoard

Setpoint AdjustPotentiometer

Setpoint AdjustPotentiometer

TransparentLens ForGreen LED




3.30(Ref.)

3.30(Ref.)

3.30(Ref.)

3.30(Ref.)

3.06

3.06

3.06

3.064.87(Ref.)

4.87(Ref.)

4.87(Ref.)

4.87(Ref.)

1.50

1.50

1.50

1.50

TenantOverrideSwitch

TenantOverrideSwitch

Do not install sensor wires in same conduitwith power wiring. Ground shield in wallsleeve junction box.

Main Power To 0 To 301 ToUnit (Volts) 300V 600V

Shielded Wire ManufacturerManufacturer Wire No.

Belden4-Wire 8729 –or Equiv.

Dearborn 4-Wire – 1061804
















Wall Sensor With Setpoint Adjustment

Wall Sensor With Tenant Override & Setpoint Adjustment

Wall Sensor With Tenant Override

Wall Sensor

IM 503-1 /

End Panel AssemblyThe final step of unit installation is attaching the end panels.End panels are required unless the unit has adjoining match-ing cabinets.

1. Refer to Figure 15 for 1 " thick end panel. Attach two (2)Tinnerman nuts to the top edge of the end panel and two(2) to the bottom end of the unit. Align the end panel withthe front and top edges of the unit. Attach end panel to theunit using four (4) 5⁄32" hex socket head fasteners provided.

2. Refer to Figure 15 for 6" thick end panel.a. Position bracket (YC1934) on wall so angle is 5" from

end of unit and near bottom.

Figure 15. 1" End Panel Figure 15. 6" End Panel

b. Mark and drill required hole for device to fasten bracketto wall (not included).

c. Attach bracket to wall.d. Attach two (2) Tinnerman nuts to the top edge of the end

panel and one (1) to the bottom front of the end frame.e. Align the end panel with the front and top edges of the unit.

Attach end panel to the unit using three (3) 5⁄32 " hex sockethead fasteners provided. Bracket should prevent move-ment of panel toward the unit when pressure is applied tothe end panel.

BracketYC 1934

End

of

Uni

t

AAF-HermanNelson4900 Technology Park Boulevard, Auburn, NY 13021-9030 USA, (315) 253-2771

Printed on recycled paper containing at least 10% post-consumer material.©1999 AAF-HermanNelson

/ IM 503-1 (Rev. 6/99)

AAF-McQuay Incorporated, hereinafter referred to as the"Company," warrants that it will provide, at the Company'soption, either free replacement parts or free repair of compo-nent parts in the event any product manufactured by theCompany and used in the United States and Canada provesdefective in material or workmanship within twelve (12) monthsfrom initial start-up or eighteen (18) months from the dateshipped by the Company, whichever comes first. For addi-tional consideration, the Company warrants that for four (4)years following the initial warranty period it will provide, at theCompany's option, free replacement parts for the motor-compressor, or, free replacement for any integral componentof the motor-compressor which proves defective in materialor workmanship. For an additional consideration, the Com-pany warrants that for nine (9) years following the initialwarranty period it will provide free replacement of the heatexchanger in gas-fired or oil-fired furnaces which provesdefective in material and workmanship. (Extended warrantiesfor motor-compressors and heat exchangers are not appli-cable unless separately purchased.)

To obtain assistance under this parts warranty, extendedmotor-compressor warranty, or extended heat exchangerwarranty, simply contact the selling agency. To obtain infor-mation or to gain factory help for AAF-McQuay, andHermanNelson brandnames, contact AAF-McQuay Incorpo-rated, Warranty Claims Department, 4900 Technology ParkBoulevard, Auburn, New York 13021-9030, telephone (315)-253-2771.

This warranty constitutes the buyer's sole remedy. It isgiven In lieu of all other warranties. There is no implied

warranty merchantability or fitness for a particular pur-pose. In no event and under no circumstances shall theCompany be liable for incidental or consequential dam-ages, whether the theory be breach of this or any otherwarranty, negligence or strict tort.

This parts warranty and the optional extended warrantiesextend only to the original user. Of course, abuse, misuse, oralteration of the product in any manner voids the Company'swarranty obligation. Neither the parts or extended warrantyobligates the Company to pay any labor or service costs forremoving or replacing parts, or any shipping charges. Refrig-erants, fluids, oils, and expendable items such as filters arenot covered by this warranty.

The extended warranties apply only to integral compo-nents of the motor-compressor or heat exchanger, not torefrigerant controls, electrical controls, or mechanical con-trols, or to failures caused by failure of those controls.

Attached to this warranty is a requirement for equipmentcontaining motor-compressors and/or furnaces to report start-up information. The registration form accompanying the prod-uct must be completed and returned to the Company withinten (10) days of original equipment start-up. If that is not done,the date of shipment shall be presumed to be the date of start-up and the warranty shall expire twelve (12) months from thatdate.

No person (including any agent, salesman, dealer or dis-tributor) has authority to expand the Company's obligationbeyond the terms of this express warranty, or to state that theperformance of the product is other than that published by theCompany.

Product Warranty

model azs, azq hermannelson classroom unit ventilator...7 fasteners - azs/azq 24, 30 8 fasteners -...

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