McQuay AZQ-24 Installation Manual

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Page 1

Installation & Maintenance Data IM 503-1

Group: Unit Ventilator Part Number: 106101101 Date: June 1999

Model AZS, AZQ HermanNelson® Classroom Unit Ventilator

HermanNelson

Page 2

Wall Sleeve

Receiving Shipment

Before signing the freight bill, be certain that all items have been received and that there is no visible damage. Note any shortages and any damage on all copies of the freight bill. Each Model AZS, AZQ unit has been carefully inspected and operated at the factory to verify proper performance. It has been packed in a sturdy carton, was checked by the carrier during loading for shipment, and should arrive in perfect condition. However, if there is damage or any shortages, the purchaser is responsible for filing the necessary claims with the carrier. Concealed damage which was not discovered until after unloading should be reported to the carrier within 15 days after receipt. To help avoid concealed damage, the air conditioners must be shipped, handled and stored right-side up. A formal claim for any shortage or damage must be filed with the carrier within nine (9) months after delivery. See Table 1 for unit weights and dimensions. Forklift type vehicles may be used to unload and move the unit. When using a forklift, it is important that the unit remain banded to its skid and be lifted only from the end designated on the carton. See Figure A. Forks on forklift should be a minimum of 36" long. Move only one unit at a time. Do not drop unit.

Storage

If an air conditioner must be stored prior to installation, find a clean, dry, protected, preferably heated area for storage until the equipment is needed. Keep within the carton during storage or handling.

Preliminary Installation

The location and installation of each Model AZS, AZQ unit should be carefully arranged to ensure convenient service access for maintenance and, if necessary, removal of the unit. If the unit has been in storage in an unheated area, care must be taken that the refrigerant circuit has had time to reach proper 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 main power disconnect switch located in the wall sleeve junction box. All field connections are made inside the wall sleeve junction box (see page 8). The Model AZS, AZQ unit is designed to be installed through an outside wall. Installation will require that the wall sleeve be removed from the unit and installed before the unit is installed. See "Uncrating Unit" section. On many jobs, the louver and wall sleeve are shipped ahead of the unit itself. Installation instructions for these components are shipped with the individual components, as well as being included in this publication.

Table 1. (See note below)

UNIT UNIT

MODEL DEPTH WT., LB. HEIGHT WIDTH

AZS-24, 30

AZQ-24, 30

AZS-36, 42

AZQ-36, 42 AZS-48, 54

AZS-48, 54

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 change

without notice. Refer to approved submittal prints for rough-in details and construction purposes and for recommended wall opening size.

28 103 31 885 28 84

28 103 31 975 28 96

28 115 31 1075 28 108

SHIP WALL SLEEVE

Page 2 / IM 503-1

Figure A.

39"

Page 3

Wall Opening Preparation

An opening in the outside wall is required to accommodate the wall sleeve and louver. The wall opening must be of sufficient size to allow proper, yet snug, fit of the louver and will depend on the type of wall. If the louver is to be installed in a masonry wall, there should also be a lintel to support the wall above the wall sleeve and louver. The opening should be sleeved to prevent moisture from seeping into the wall interior. Refer to

approved submittal prints for recommended wall opening size.

Remodeling Existing Buildings

If the Model AZS, AZQ unit is to be installed in an existing classroom, an opening must be cut in the outside wall to accommodate the wall sleeve and louver. This is accomplished as follows: First, the outside of the wall is cut with a carborundum or other suitable blade as shown in Figure B. This opening should be slightly larger than the size of the louver supplied with the unit.

Figure B.

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

Figure D.

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

Figure E.

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

Figure C.

New Buildings

In new construction, if any portion of the wall sleeve is to be recessed into the wall, the opening must be large enough to accommodate the wall sleeve (see Table 1, page 2). For smaller wall openings the wall sleeve will be nonrecessed and all of the unit will project into the room. In all cases the bottom of the wall opening must be at the same height as the floor line. A lintel must be installed above the opening in masonry walls to support the block and brick.

Uncrating Unit (Figure A)

The unit should be moved to the location at which it is to be installed before uncrating. Check tagging on unit carton to confirm that the unit is correct for the location. The carton is imprinted with the AAF-HermanNelson trademark which is the "front" or room side of the unit. The end of the carton marked "Truck from this end" should be on the right-hand side when facing the front of the carton.

IM 503-1 / Page 3

Page 4

Lower crated unit from dolly (if used), but do not drop.

Remove external carton by lifting off, and save this carton. To remove unit from the skid, remove fasteners at each end which fasten the unit to the skid and slide the front of the unit off of the skid. Tip unit forward until it is possible to slide skid out from under the unit. Gently lower the rear of the unit to the floor. After the unit has been installed, cut out the rear of the carton and replace it over the unit until all construction has been completed. This will prevent the unit from being scratched or damaged by other workers finishing the area.

Remove the protective covering from the interior of the three front panels to prevent block return air openings. Check for concealed shipping damage.

Figure 2. Cross Section Detail of Bottom of

Wall Sleeve & Intake

Fasten cross channel to floor thru 1⁄4" holes with appropriate fasteners (by others.) 7 fasteners - AZS/AZQ 24, 30 8 fasteners - AZS/AZQ 36, 42 9 fasteners - AZS/AZQ 44, 48, 54

Bottom of Wall Sleeve Cross Channel

A "D" shaped seal is provided at the bottom rear of the Wall Sleeve to provide a watertight seal to the bottom of the unit when installed.

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

Bottom channel of Louver

⁄16"

Wall Sleeve Installation

General — The wall sleeve must be installed before the unit

can be placed. The wall sleeve measures 85", 96" or 108" wide by 28" high and may be recessed into the wall up to

⁄8" in depth.* Consult the approved AAF submittal draw-

11 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 "wet sleeve" concept. In brief, this means the design accommodates the penetration of some moisture into the rear section of the wall sleeve with the provision being made for containment and disposal of this moisture to the outdoors.

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

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

Figure 1.

Recessed and Nonrecessed Applications

The 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 building

at rear flange of wall sleeve.

5. Seal watertight bottom of wall sleeve at rear "D" seal to

building and pitch toward louver bottom channel. Also

fasten cross channel to floor through holes with fasteners

(by others). See Figure 2.

Chassis

Wall Sleeve

Seal watertight bottom of Wall Sleeve at rear "D" seal to building and pitch toward bottom channel of louver as shown.

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

6. The louver must be installed with the drain notches

located at the bottom and the bird screen located on the unit side. Openings between notches must be free

of mortar or other foreign material for water removal. Refer to 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 resistant material. The width of the air splitters is determined by the width of the wall opening. The depth of the air splitters is determined by the distance between the louver horizontal splitter and the wall sleeve splitters.

b. The horizontal air splitters should have a 1" diameter

drain hole approximately 6" from each end.

c. Install the horizontal air splitters by fastening to the

wall sleeve splitters.

d. Apply rubber stripping or sealant material (by

others) across full length of horizontal air splitters to seal against louver.

9. Permanently seal any remaining air leaks so that, when finished: 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 drawings.

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

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

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

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

Page 4 / IM 503-1

Page 5

CAUTION: Sleeves furnished for use with optional heated rear drain will have an electric cord installed along

the length of the wall sleeve splitter. Avoid screw penetration or drilling into this cord when installing the horizontal air splitter. (Model AZS, AZQ Only)

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

By Others. Wall Sleeve must

be sealed watertight at top and both ends at location shown.

By Others. Seal Horizontal Air Splitters to building at both ends.

By Others. Seal both ends of opening between Wall Sleeve and Louver.

IMPORTANT NOTE: By Others: Attach Horizontal Air Splitters to Wall Sleeve

Splitters as shown. Splitters to have 1" dia. drain hole approx. 6" from each end.

Wall Sleeve Splitter(s) (See Caution Above)

"D" Seal

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

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

⁄16" Under Intake must be free for water run-off. INTAKE MUST

STAND ON EMBOSSED FEET LOCATED ON BOTTOM.

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

Condenser discharge

Condenser inlet

Outdoor air inlet

By Others. Louver must be sealed watertight at top and both ends.

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

By Others. Wall Sleeve must

be sealed watertight at top and both ends at location shown.

By Others. Seal Horizontal Air Splitters to building at both ends.

Wall Sleeve Splitter(s) (See Caution Above)

"D" Seal

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

IMPORTANT NOTE: By Others. Seal Louver to Wall Sleeve at top and bottom Wall Sleeve Splitters, and ends.

⁄16" Under Intake must be free for water run-off. INTAKE MUST

STAND ON EMBOSSED FEET LOCATED ON BOTTOM.

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

By Others. Louver must be sealed watertight at top and both ends.

IM 503-1 / Page 5

Page 6

CAUTION: Sleeves furnished for use with optional heated rear drain will have an electric cord installed along

the length of the wall sleeve splitter. Avoid screw penetration or drilling into this cord when installing the horizontal air splitter. (Model AZS, AZQ Only)

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

By Others. Apply sealant (by others) to bottom edge of unit (not

shown) and to top flange and both end flanges of wall sleeve (as shown.) This must provide a watertight seal to the wall of the building.

By Others. Seal Horizontal Air Splitters to building at both ends.

By Others. Seal both ends of opening between Wall Sleeve and Louver.

IMPORTANT NOTE: By Others: Attach Horizontal Air Splitters to Wall Sleeve

Splitters as shown. Splitters to have 1" dia. drain hole approx. 6" from each end.

Wall Sleeve Splitter(s) (See Caution Above)

Seal Horizontal Air Splitter(s) to Louver.

"D" Seal

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

⁄16" Under Intake must be free for water run-off. INTAKE MUST

STAND ON EMBOSSED FEET LOCATED ON BOTTOM.

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

Condenser discharge

Condenser inlet

Outdoor air inlet

By Others. Louver must be sealed watertight at top and both ends.

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

By Others. Apply sealant (by others) to bottom edge of unit (not

shown) and to top flange and both end flanges of wall sleeve (as shown.) This must provide a watertight seal to the wall of the building.

By Others. Seal both ends of opening between Wall Sleeve and Louver.

Wall Sleeve Splitter(s)

"D" Seal

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

IMPORTANT NOTE: By Others. Seal Louver to Wall Sleeve at top, Wall Sleeve Splitters and ends.

⁄16" Under Intake must be free for water run-off. INTAKE MUST

STAND ON EMBOSSED FEET LOCATED ON BOTTOM.

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

By Others. Louver must be sealed watertight at top and both ends.

Page 6 / IM 503-1

Page 7

Figure 7.

Typical Wall Louver

Louver

Blade

Factory Mounted Bird Screen

Bird Screen

Fasteners

Frame

Optional Flanges

Splitter Lines Up With

Wall Sleeve Splitter

Detail of Notches

(Drain Holes)

Bottom

Flange

Demountable

Louver Section

Drain Notch At Bottom

Information

Labels

Nonrecessed Applications (See Figures 5 and 6)

The installing contractor shall check the following before proceeding:

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 unit to seal against.

Any moldings at the floor/wall line should be omitted behind 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 provide

watertight seal to interior wall of building.

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

sleeve vertically.

3. Fasten the wall sleeve securely in place by:

a. Securing it to the floor through the two (2)

⁄8" diameter holes in the turned out bottom flanges of the wall sleeve at each end, and/or:

b. Securing it to the wall through the two (2)

⁄8" diameter holes in the turned out vertical flanges of the wall sleeve at each end.

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

b. If the panel wall is less than 2

⁄4" thick, the wall louver should be installed flush to the interior wall and be allowed to extend to the outside as required.

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

Louver Installation

The standard louver is an aluminum, vertical, divided blade design complete with bird screen. This louver is also available with flanges and/or with a heavy-duty exterior lattice grille.

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

2. Measure the opening to be sure there is adequate clearance for the louver around the sides. Observe the opening in relation to the wall sleeve and unit. For proper unit operation, the louver must be centered left to right and top to bottom to the wall sleeve. If the louver is of such a dimension that it extends above, below, or beyond the wall sleeve, then these areas must be blocked off airtight (see Figure 8).

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

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

Optional Factory Mounted Exterior Grille

Mechanical Fasteners (Number Required Varies With Size of Louver)

Figure 8.

Shaded area of louver must be blocked off & made airand watertight, by installing contractor.

Exaggerated oversize louver or wall opening.

Unit Wall

Sleeve

same height as the horizontal splitter of the wall sleeve. The louver consists of a frame, which must be permanently mounted in the wall, a demountable center louver section to allow service access to the rear of the unit. To install the louver in the opening, the demountable center section must be in place. This will insure that the frame remains square during installation.

6. Before installing the louver in the opening, place a heavy bead of caulk along the top and two sides of the frame that come in contact with the walls of the opening. Use a flexible, waterproof caulk such as silicone.

7. Once the louver has been placed in the opening, further mechanical fastening may be desired or required. Fasten in a manner appropriate to the installation. Care must be taken if fasteners are to be placed in the frame. If this is necessary, remove the demountable center section by removing the screws that hold it in place. Drill holes in the desired locations and fasten with flat head screws. Be sure these screws do not interfere with the reinstallation of the demountable section. Shims must be placed between the frame and the wall so it won't be distorted. After the frame has been satisfactorily fastened, reinstall the demountable center 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 the frame to seal it watertight. Caution: Do not plug the weep

holes in the bottom of the louver.

Louvers With Flanges

1. If the louver is supplied with flanges, follow steps 1 through 6 above. Additionally, place a bead of caulk on the inside of the top and side flanges that come in contact with the building facade. Do not caulk the bottom flange.

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

3. Seal the top and two sides with waterproof caulk to make it weathertight. Do not seal the bottom flange. To do so may trap water behind the flange.

IM 503-1 / Page 7

Page 8

Electrical Connections

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

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

floor within the confines of the wall sleeve and any portion of the wall sleeve is recessed into the wall, the conduit must be flush with the floor to permit installation of the wall sleeve. Sufficient space must be left around the conduit to permit the attachment of continuing conduit after the wall sleeve is installed. For concrete slabs, it is recommended that this be accomplished either by sleeving the conduit or by recessing a junction box into the slab.

2.5/1.75" Dia. Knockout

3.0/2.0" Dia. Knockout

Wall Sleeve

Conduit (by others)

Rear edge of wall sleeve

2.5/1.75" Dia. Knockout

3.0/2.0" Dia. Knockout

Wall Sleeve

.875" Dia. Knockouts (3)

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

Safety Precaution: Reverse this cover when unit is removed from wall sleeve to cover opening in the end of switch box.

Wall Sleeve Junction Box

/8" x 35/8" opening (for main power wiring from wall

sleeve to chassis). Field connection by others.

Control receptacle with plug-in disconnect (AAFHermanNelson). Leads are provided for wire nut connection to all remote controls.

Stub-up from bottom must be confined in this area.

/4"

51/2"

.875" Dia. Knockouts (3)

/2"

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

Right End

Of Unit

Safety Precaution: Reverse this cover when unit is removed from wall sleeve to cover opening in the end of switch box.

Wall Sleeve Junction Box

Whenever the electric stub-up is brought in through the floor within the confines of the wall sleeve, and any portion of the wall sleeve is recessed into the wall, the conduit must be flush with the floor to permit installation of the wall sleeve. Sufficient space must be left around the conduit to permit the attachment of continuing conduit after the wall sleeve is installed. For concrete slabs, it is recommended that this be accomplished either by sleeving the conduit or by recessing a junction box into the slab.

Conduit (by others)

Rear edge of wall sleeve

Page 8 / IM 503-1

/8" x 35/8" opening (for main power wiring from wall

sleeve to chassis). Field connection by others.

16"

Control receptacle with plug-in disconnect (AAFHermanNelson). Leads are provided for wire nut connection to all remote controls.

Stub-up through side must be confined to this area: cut in field. Opening must be carefully prepared and gasketed for air tightness.

Right End

Of Unit

Page 9

Note: These are general instructions. Refer to the AAFHermanNelson submittal drawings for specific dimensions, unit arrangement, stub-up locations, recommended wall opening 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 4 through 9.

3. For nonrecessed applications, inspect the field applied elastic tape to make sure it will seal tightly to prevent air leaks after unit is installed.

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

5. Check room air and condenser fan shaft coupling setscrews to be sure they are tightened securely to both motor shaft and fan shaft.

6. Rotate the room air and condenser fans to be sure they rotate 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 threaded studs (Figure 13) on the wall sleeve with the holes on each end of the unit. Sliding of the unit to the wall can be made easier with the assistance of Caster Kit P/N - 105629001. A piece of cardboard placed under the unit will make this job easier and prevent marring the floor. (Do not leave cardboard under unit after installation.) The wall sleeve mounting studs should slide through the holes in the unit. Place the washers over the threaded studs and tighten the mounting nuts. Do not draw the nuts up as tight as possible as they may distort the unit and loosen the caulking and wall sleeve from their position. If an adapter collar is used, make sure that the unit, adapter collar and wall sleeve all line up properly.

Figure 10.

ROOM AIR FAN

SHAFT BEARING

OIL CUP

Figure 11.

Oil Here

Caution:

Failure to follow these instructions may rack the unit which can cause the fan or unit to vibrate noisily on startup and appear to be in need of fan balancing. For quiet, smooth unit operation it is important that the unit be square, level and the base solidly supported by the floor, using shims where necessary due to uneven construction in order to prevent distortion of the cabinet. It is essential to keep unit level.

Defrost Condenser Drain Piping It is strongly recommended that the condensate from the heating defrost cycle be disposed of into a building condensate drain. See Figure 14, page 10 for details. If a building

condensate drain is not used, and the drain line is exposed to freezing temperatures, adequate freeze protection must be furnished.

Oiling

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

Figure 12.

Figure 13.

CONDENSER

FAN SHAFT

BEARING

IM 503-1 / Page 9

Page 10

Piping Stub-up Details, 6" End Panel

Piping Stub-up Within Cabinet

Unit End Compartment

⁄

Wall Line

Caution: Space available in left end compartment for piping stub-up. Stub-up including unions and shutoff valves must disconnect below floor line for unit installation and removal.

103⁄

Left End of unit (Less end panel)

Piping Stub-up Within 6" End Panel

Unit End Compartment

Wall Line

Space available at left end of unit for piping stub-up when 6" end panel is used.

Hot Water Coil Piping Arrangements (see Note 12)

Left End of unit (Less end panel)

End Panel 6"

Application and Dimension

All dimensions in inches

Piping Within Unit End Compartment Piping Outside Unit End Compartment

F&BP With End-of-Cycle Valve

3-Way Modulating Valve Control

F&BP With End-of-Cycle Valve

3-Way Modulating Valve Control

Page 10 / IM 503-1

Page 11

Coil Piping

Heating valve actuators should be mounted in an upright position above the centerline of the valve body and should be piped normally open to the coil. Modulating valve actuators for hot water applications may be positioned above the valve body a maximum of 75° from the vertical. For steam applications only, mount the modulating valve actuator above the valve body at 45° from the vertical. Two-position, end-ofcycle (EOC) valves used with face and bypass damper controlled units may be positioned above the valve body a maximum of 85° from the vertical. All control valves are shipped loose to insure that no shipping damage occurs to the

piping or the coil connection stub from the weight of the valve and to provide the installing contractor with maximum flexibility in making the field piping connections. Refer to AAFHermanNelson factory instruction sheet shipped with the unit for port orientation and a piping schematic. Control valves must be installed on the units in which they are shipped. Indiscriminate mixing of valves among units can result in valves not properly sized for the desired flow rate. Control valves should be installed so that there is 2" minimum clearance to remove the actuator from the valve body. As a future service consideration, provide unions for removal of the unit coil 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)

Supply

Return

Unions (Others)—Must disconect below floor line

Two-way, two-posiiton valve (AAF-HermanNelson)

Union: Half attached to coil, half attached to valve

Modulating control valve (AAF-HermanNelson)

All piping, fittings and unions by others (not AAFHermanNelson) except as noted

Check valve and pressure equalizing line (AAFHermanNelson)

Float and thermostaic steam trap (Others)

Supply and return coil connection and stub-up unions by others

Steam Coil Piping Arrangements (see Note 12)

Piping Within Unit End Compartment Piping Outside Unit End Compartment

F&BP With End-of-Cycle Valve

2-Way Modulating Valve Control

IM 503-1 / Page 11

Page 12

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 for

drainage.

¨ 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 water

leaks

¨ 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 and

unit removal

¨ Shipping carton saved for use later to protect unit ¨ Check unit nameplate to verify that power supply is

correct

Post-installation Checklist

¨ Unit securely fastened to wall sleeve ¨ Electrical hook-up complete; power, control, wall

thermostat (if applicable) in accordance with unit wiring diagrams.

¨ Air filter clean and in place ¨ All access and end panels in place and protective

covering 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

Page 12 / IM 503-1

Page 13

Field Wiring Controls, Maximum Outdoor Air Unit

Wall Sleeve Junction Box - Right End

YEL 36 37 BRN

Factory Wiring Furnished Only As Required

BLK WHT RED GRN ORG BLU PNK GRY

904A 910 911

For Further Information See Appropriate Field Wiring Detail

Humidistat Wiring

Day/Night Changeover Control

(Stand-Alone Units Only)

Control Receptacle In Wall Sleeve Junction Box

YEL 36 37

BRN BLK WHT RED GRN ORG

BLU PNK

GRY

Day/Night Changeover (4VA Inrush) Energize To Put Unit In Night Mode

Control Receptacle

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

SW-1 - - Main Power “On - Off” Switch

Master/Slave

(Stand-Alone Units Only)

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

YEL 36

37 BRN BLK WHT RED GRN ORG BLU PNK GRY

Control Receptacle In Wall Sleeve Junction Box First Unit

BLU PNK GRY

Ground

SW-1

Main Power Supply (Omit L3 For Single

Phase Applications)

Field Wiring

Network Wiring

(Network Units Only)

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

YEL 36

37 BRN BLK WHT RED GRN ORG BLU PNK GRY

Control Receptacle In Wall Sleeve Junction Box First Unit

BLU PNK GRY

Ventilation Lockout Control

(Stand-Alone Units Only)

YEL 36 37

BRN

Control Receptacle In Wall Sleeve Junction Box

BLK WHT RED GRN ORG

BLU PNK

GRY

Exhaust Fan Interlock

YEL 36 37 BRN

Control Receptacle In Wall Sleeve Junction Box

BLK WHT RED GRN ORG BLU PNK GRY

Vent Lockout (4VA Inrush) Energize To Close The Outdoor Air Damper

Exhaust Fan Interlock (4VA Inrush) Energize To Open Outdoor Air Damper

Chart 1

Belden or

Equivalent

Control Receptacle In Wall Sleeve Junction Box Additional Unit

BLU PNK GRY

Control Receptacle In Wall Sleeve Junction Box Last Unit

Wire Mfg.

2-Wire 8761 9341

Mfg.’s Wire No.

0-300V 301-600V

Chart 2

Belden or

Equivalent

Control Receptacle In Wall Sleeve Junction Box Additional Unit

BLU PNK GRY

Control Receptacle In Wall Sleeve Junction Box Last Unit

Wire Mfg.

2-Wire 8761 9341

To Local Master Panel

Mfg.’s Wire No.

0-300V 301-600V

Pneumatic Day/Night ChangeoverControl

(Stand-Alone Units Only)

YEL 36

Control Receptacle In Wall Sleeve Junction Box

37 BRN

Pneumatic/Electric

BLK

Switch.

WHT

Close Contacts To Put Unit In

RED

Night Mode. (24VAC,

GRN

Class II, 1 AMP)

ORG BLU

PNK GRY

IM 503-1 / Page 13

Page 14

Wall Mounted Room Air Sensors

Control Receptacle in wall sleeve junction box

Sensor Terminal Board

Wall Sensor

3.30

(Ref.)

4.87

3.06

(Ref.)

1.50

Wall Sensor With Tenant Override

3.30

(Ref.)

4.87

3.06 (Ref.)

1.50

Transparent Lens For Green LED

Tenant Override Switch

Main Power To 0 To 301 To

Unit (Volts) 300V 600V

Shielded Wire Manufacturer Manufacturer Wire No.

Belden

or Equiv.

Dearborn 4-Wire – 1061804

Do not install sensor wires in same conduit with power wiring. Ground shield in wall sleeve junction box.

Main Power To 0 To 301 To

Unit (Volts) 300V 600V

Shielded Wire Manufacturer Manufacturer Wire No.

Belden

or Equiv. Dearborn 4-Wire – 1061804

Do not install sensor wires in same conduit with power wiring. Ground shield in wall sleeve junction box.

4-Wire 8729 –

Control Receptacle in wall sleeve junction box

Wall Sensor With Tenant Override & Setpoint Adjustment

3.30

Sensor Terminal Board

1.50

3.06

4.87

(Ref.)

Setpoint Adjust Potentiometer

Transparent Lens For Green LED

Tenant Override Switch

Do not install sensor wires in same conduit with power wiring. Ground shield in wall sleeve junction box.

Wall Sensor With Setpoint Adjustment

3.30

(Ref.)

Transparent Lens For Green LED

4.87

3.06

(Ref.)

Sensor Terminal Board

1.50

Setpoint Adjust Potentiometer

Do not install sensor wires in same conduit with power wiring. Ground shield in wall sleeve junction box.

Main Power To 0 To 301 To

Unit (Volts) 300V 600V

Shielded Wire Manufacturer Manufacturer Wire No.

Belden

or Equiv.

Dearborn 4-Wire – 1061804

Main Power To 0 To 301 To

Unit (Volts) 300V 600V

Shielded Wire Manufacturer Manufacturer Wire No.

Belden

or Equiv.

Dearborn 4-Wire – 1061804

4-Wire 8729 –

IM 503-1 / Page 14

Page 15

End Panel Assembly

The final step of unit installation is attaching the end panels. End panels are required unless the unit has adjoining matching 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 with the front and top edges of the unit. Attach end panel to the unit using four (4)

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

⁄32" hex socket head fasteners provided.

b. Mark and drill required hole for device to fasten bracket

to 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)

" hex socket

head fasteners provided. Bracket should prevent move-

ment of panel toward the unit when pressure is applied to

the end panel.

Figure 15. 6" End Panel

End of Unit

Bracket

YC 1934

IM 503-1 / Page 15

Page 16

Product Warranty

AAF-McQuay Incorporated, hereinafter referred to as the "Company," warrants that it will provide, at the Company's option, either free replacement parts or free repair of component parts in the event any product manufactured by the Company and used in the United States and Canada proves defective in material or workmanship within twelve (12) months from initial start-up or eighteen (18) months from the date shipped by the Company, whichever comes first. For additional consideration, the Company warrants that for four (4) years following the initial warranty period it will provide, at the Company's option, free replacement parts for the motorcompressor, or, free replacement for any integral component of the motor-compressor which proves defective in material or workmanship. For an additional consideration, the Company warrants that for nine (9) years following the initial warranty period it will provide free replacement of the heat exchanger in gas-fired or oil-fired furnaces which proves defective in material and workmanship. (Extended warranties for motor-compressors and heat exchangers are not applicable unless separately purchased.)

To obtain assistance under this parts warranty, extended motor-compressor warranty, or extended heat exchanger warranty, simply contact the selling agency. To obtain information or to gain factory help for AAF-McQuay, and HermanNelson brandnames, contact AAF-McQuay Incorporated, Warranty Claims Department, 4900 Technology Park Boulevard, Auburn, New York 13021-9030, telephone (315)253-2771.

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

warranty merchantability or fitness for a particular purpose. In no event and under no circumstances shall the Company be liable for incidental or consequential damages, whether the theory be breach of this or any other warranty, negligence or strict tort.

This parts warranty and the optional extended warranties extend only to the original user. Of course, abuse, misuse, or alteration of the product in any manner voids the Company's warranty obligation. Neither the parts or extended warranty obligates the Company to pay any labor or service costs for removing or replacing parts, or any shipping charges. Refrigerants, fluids, oils, and expendable items such as filters are not covered by this warranty.

The extended warranties apply only to integral components of the motor-compressor or heat exchanger, not to refrigerant controls, electrical controls, or mechanical controls, or to failures caused by failure of those controls.

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

No person (including any agent, salesman, dealer or distributor) has authority to expand the Company's obligation beyond the terms of this express warranty, or to state that the performance of the product is other than that published by the Company.

AAF-HermanNelson 4900 Technology Park Boulevard, Auburn, NY 13021-9030 USA, (315) 253-2771

Printed on recycled paper containing at least 10% post-consumer material.

Page 16 / IM 503-1 (Rev. 6/99)