McQuay AZQ-24 Installation Manual

Installation & Maintenance Data IM 503-1

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

Model AZS, AZQ HermanNelson® Classroom Unit Ventilator

HermanNelson

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

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Figure A.

39"

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

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

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.