JOHNSON CONTROLS
64
FORM 102.20-N1
ISSUE DATE: 7/06/2016
SECTION 3 - HANDLING, STORAGE, AND INSTALLATION
FIGURE 98 -  PENETRATIONS AND GROMMET DETAILS
A
Ø C
Ø B
Ø D
3 OR 4 RINGS
NEOPRENE
GROMMET***
SEALANT** ALL 
AROUND,
BOTH SIDES OF 
THE OPENING.
PANEL INNER 
SURFACE
PANEL OUTER 
SURFACE
PASSING ELEMENT
(CONDUIT, PIPE, 
ETC.)
FOAM INSULATION
* HOLE SHALL BE CAREFULLY CUT WITH HOLE SAW OR DRILL.  
LEAVING A SMOOTH, CLEAN CUT.
** RECCOMENDED SEALANT IS MANUS BOND, LOCTITE OR BOSTIK
SEALANT** ALL 
AROUND,
BOTH SIDES OF 
THE OPENING.
Ø B
Ø E*
DIMENSIONS
IRON 
PIPE SIZE 
(nominal) 
COPPER 
PIPE SIZE 
(O.D.)
THIN WALL 
CONDUIT
USE 
GROMMET P/N
GROMMET 
DEPTH
(A)
GROMMET 
HOLE 
DIAMETER
(ØB)
GROMMET 
LIP 
DIAMETER
(ØC)
MARKED 
GROMMET 
HOLE
DIAMETER 
(CUT OUT)
(ØD)
PANEL 
HOLE CUT 
DIAMETER
(ØE)
3/4”, 1” 7/8”, 1-1/8” 3/4”, 1” 028-11872-000 2.375” 0.500” 3.125” 0.749 2.50”
1-1/4”, 1-1/2” 1-3/8”, 1-5/8” 1’1/4”, 1-1/2” 028-11871-000 2.375” 1.000” 3.875” 1.249 3.25”
1-1/4”, 1-1/2” 1-3/8”, 1-5/8” 1’1/4”, 1-1/2” 028-11872-000 2.375” 0.500” 3.125” 1.249 2.50”
1-1/4”, 1-1/2” 1-3/8”, 1-5/8” 1’1/4”, 1-1/2” 028-11861-000 2.375” 1.000” 5.125” 1.251 4.50”
2” 2-1/8” 2” 028-11871-000 2.375” 1.000” 3.875” 1.749 3.25”
2” 2-1/8” 2” 028-11861-000 2.375” 1.000” 5.125” 1.751 4.50”
2” 2-1/8” 2” 028-11872-000 2.375” 0.500” 3.125” 1.875 2.50”
2-1/2” 2-5/8” 2-1/2” 028-11861-000 2.375” 1.000” 5.125” 2.251 4.50”
2-1/2” 2-5/8” 2-1/2” 028-11871-000 2.375” 1.000” 3.875” 2.375 3.25”
3” 3-1/8” 3” 028-11861-000 2.375” 1.000” 5.125” 2.875 4.50”
4" 4-1/8" 4" 028-11881-000 2.251" 1.250" 6.125" 3.875" 5.50"
LD09673