McQuay PDHA Installation Manual
Installation & Maintenance Data
Custom Wall Sleeve (CWS)
Introduction
The wall sleeve is a standard size 16" high, 42" wide
and 13-3/4" deep. Slide channels are factory welded into
the sleeve to facilitate easy installation and removal of
the chassis. Each wall sleeve is predrilled to match the
mounting screws of the chassis. Knockouts are provided
for the optional external drain kit used with the heat
pump models.
Figure 1. Wall Sleeve
Tinnerman Clips
Slide Channels
Note: Wall sleeve shown with optional insulation installed.
IM 880
Group: PTAC
Part No.: 6681093
Date: September 2007
All necessary fasteners are supplied to assemble the
chassis and louver to the wall sleeve.
Wall Opening Requirements
When roughing in the opening for the wall sleeve,
make certain there is sufcient clearance from the
walls and oor. The wall sleeve should be positioned
a minimum of 5/8" from the nished side wall to
accommodate the room cabinet. A minimum distance of
3" above the nished oor is required for return air.
The rough opening should measure 161/4" high x
421/4" wide. When using a louver frame, the opening
must measure 165/8" x 425/8". Louver frames should be
used for panel wall and thin wall applications to assure
positive anchoring to the wall (Figure 13). When a
subbase is used, the opening must start 3" to 4" above
the nished oor (including carpeting) to match the
height of the subbase selected. The subbase is available
in 3" or 4" heights and has adjustable leveling legs that
provide up to an additional 1" height.
A 3" or 4" subbase is required for 265V models and is
optional for 208/230V models.
Figure 2. Unit with Subbase
42" (1067 mm)
43" (1092 mm)
411/2" (1054 mm)
**
133/4"
(349 mm)
161/2"
(419 mm)
*Subbase Side Dimension:
Electric: 43/4" to 133/4" (111mm to 349mm) (See Figure 6)
Hydronic: 0" to 133/4" (0mm to 349mm) (See Figure 7)
**Subbase Height Dimension:
Electric: 3" to 4" (76mm to 102mm) with 0" to 1" (0mm to 25m) leveling screw
Hydronic: 8" (203mm) with 1/4" (6mm) to 11/4" (32mm) leveling bolts
1. Unit pictured with subbase installed. Subbase is optional on 208V and 230V
units. Subbase is standard on all 265V units and units with hydronic heat.
Hydronic subbase is ush with the front of the cabinet. Electric subbase is
ush with wall sleeve.
2. Subbase extends to front edge of unit when furnished with hydronic heat.
3. Opening needs to be 165/8" x 425/8" (422mm x 1083mm) when using a louver
frame.
4. Subbase side channels are adjustable from 43/8" to 133/4" (111mm to 349mm).
16" (406 mm)
22" (559 mm)
81/4"
(210 mm)
*
©2007 McQuay International IM 880 / Page 1 of 8
Wall Construction Types
Figure 3. Panel Wall (Thin) Construction
Steel Studs
Concrete
Pillars
161/4" x 421/4"
Wall Sleeve
Rough Opening or
165/8" x 425/8" When using
a Louver Frame
Figure 5. Frame and Brick Construction
Floor
Figure 4. Masonry Wall (Thick) Construction
Room Side
Wall Sleeve Extension
16" x 42"
Wall Sleeve
Lintel
(by others)
Splitters
Lintels (by others)
16" x 42"
Wall Sleeve
Subbases – Dimensions
Figure 6. Electrical Subbase
5
/8"
7
/8"
3"
21/2"
161/4" High
421/4" Wide Wall
Sleeve Rough Opening
5"
Electrical Knockouts
17"
Plan
411/2"
0" to 93/8"
43/8"
12"
11/2"
IM 880 / Page 2 of 8
Leveling Screw (4 Places)
Front Elevation (Three Front Panels in Place)
3"or 4"
0" to 1"
Figure 7. Hydronic Subbase
Receptacle (Factory installed when
As Req'd
21/2"
81/4"
3/4"
15"
3" x 5" Opening for Electrical
and/or Piping Rough-in
5
/8" O.D. Copper Sweat
fuse & disconnect are furnished)
21/2"
Top View
3/4"
71/4"
Permanent
Mesh Filter
411/2"
71/2"
63/4"
Front View
Installation Requirements For Recessed
Louver Wall Sleeve
1. The Recessed Louver Wall Sleeve must extend a
minimum of 11/4" past the nished interior wall.
2. The Recessed Louver Wall Sleeve must be installed
so that it is ush with the exterior face of the building
and the drip edge must extend 1/4" beyond the face
(Figure 8).
Installing Recessed Louver Wall Sleeve
1. Clean the opening of all debris that may interfere
with installation.
2. If the unit is to be supplied with a subbase, install
subbase before installing cabinet/wall sleeve (see
IM 879).
3. lf the optional drain kit is to be employed (heat pump
only), see IM 887.
4. Place a thin pad of soft mortar on the bottom of the
opening and slide in the cabinet/wall sleeve. Louver
should be ush to exterior surface when complete.
Note: The wall sleeve is not intended to replace the
lintel.
5. Level the wall sleeve in both directions, left to right
and inside to outside, using the top of the wall
sleeve and plumb wall sleeve for vertical on the
sides.
IMPORTANT!
Do Not level base of wall sleeve. The bottom of the Recessed
Louver Wall Sleeve has a built in pitch to the outside for proper
drainage. (The inside height dimension is 15.88" and the outside
dimension is 16" to provide the necessary drainage pitch).
NOTES:
1. Side channels are adjustable from 0"–93/8" in
length by inverting them. Side channels are
predrilled to allow innite adjustment.
2. Subbase shown with louvered front panel
removed. Front panel is hinged to allow
access to valve, coil, lter & electrical
junction box.
3. Leveling legs are adjustable from 1/4"–11/4".
8"
Leveling Legs
Optional Disconnect
31/4"
11/2"
51/2"
Fuse
Electrical
Knockout
1/4" – 11/4"
End View
NOTICE
Standard Louver can not be used with recessed louver wall
sleeve. Louver is special order. Contact factory for more
information if necessary.
Figure 8. Recessed Louver Wall Sleeve Installation
Level the top of the wall
sleeve, NOT the base
of the wall sleeve (see
IMPORTANT notice)
133/4"
17"
(432mm)
See Note
Finished
Floor
or Carpet
Note: Standard subbase is available in 3" or 4" (76 mm or 102 mm)
81/4"
(209mm)
157/8"(403mm)
Room
Cabinet
Wall Receptacle
(by others)
height. Leveling legs provide adjustment of 1" (25 mm).
(349mm)
Wall Sleeve
Extends 1/4"
beyond the
exterior face of
the building
Steel Lintel
(by others)
5/16" (8mm)
Anchor Hole
16"
(406mm)
Drip Edge
Detail
IM 880 / Page 3 of 8
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