Pace PAI, Installation And Assembly Manual, Page: 72 / 108

SECTION 3 - HANDLING, STORAGE, AND INSTALLATION PACE │ Installation & Assembly Manual
Issue Date: 07/03/2018
72
Form PA102.20-N1
Apply Gaskets
Apply the gaskets in the following order:
1. Neoprene gasket (P/N 028-11880-010) to the un-
derside of the roof overhang as shown in Figure
115 on page 72 .
GASKET
AHU
LD11564
Figure 115 - Install Gasket Under Roof Overhang
2. Gasket to the top of the curb (provided by curb
vendor).
3. Vertical neoprene gasket (P/N 028-11880-010) to
the pipe chase.
4. Horizontal neoprene gasket with the outside edg-
es of the housing . Horizontal gaskets must com-
pletely overlap vertical gaskets in all four corners
as shown in Figure 116 on page 72.
VERTICAL
GASKET
HORIZONTAL
GASKET
PIPE
CHASE
LD12560a
Figure 116 - Apply Gasket to Pipe Chase
Attach Pipe Chase
1. Set the pipe chase on the pipe chase curb 3 in.
away from the AHU.
2. Tilt the top of the pipe chase toward the AHU.
Work it under the roof overhang. Be careful not
to damage the neoprene gaskets. Lift the pipe
chase slightly to clear the curb gasket, and swing
the bottom into the AHU.
3. If equipped, attach the pipe chase base rail to the
AHU base rail. Place the 3/8 in. bolts and lock
washers (provided) through the pipe chase brack-
ets into the threaded holes in the AHU as shown
in Figure 117 on page 72 .
Figure 117 -
Install Pipe Chase Base Rail to AHU Base
Rail
LD12034c
BOLT
LOCK
WASHER
RIVET NUT
BASE RAIL
COVER
PIPE CHASE
BASERAIL
UNIT BASERAIL
4. Make sure the pipe chase is square and the
door(s) close and open without rubbing or binding.
5. Secure the pipe chase to the top and bottom race-
ways (heavy gage metal) of the AHU through the
pre-punched holes of the inside top and bottom
flanges with the self-drilling screws as shown in
Figure 118 on page 72 .
INSTALL
SCREWS
PIPE
CHASE
LD12561a
Figure 118 - Install Flanges