Rinnai EX38DT Installation And Operation Manual page 17

4.4.3 Attach Back Spacers
Attach side back spacers to both sides of the
furnace with 2 screws each.
Figure 11
4.4.4 Install the Flue
Manifold
Guidelines:

The flue manifold must exhaust to the
outside. Do not exhaust into other
rooms.

The flue manifold is not designed to be
positioned under floors or below the
furnace.

The termination cannot be vertical.

This furnace can only be used with one
of the five types of Rinnai flue kits. The
flue kits and their dimensions are listed
in section "4.2.1 Items Included."

Refer to "Flue Terminal Clearances" in
section "4.3.2 Clearances."
EX38DT Installation and Operation Manual
Instructions:
1. Disassemble the flue manifold
The flue consists of 3 parts:
 sleeve
 inside connection
 outside terminal
Disassemble the flue manifold by first
pulling out the inside connection. To
remove the outer terminal pull and release
the two internal ties and then pull out the
outer terminal.
Clearance to combustibles for the sleeve
and flanges is zero inches.
Inside Connection
Figure 12
2. Adjust the sleeve length
Measure wall thickness through previously
drilled Ø3 1/8 inch (Ø80 mm) hole.
The end of the sleeve should protrude 3/16 -
3/8 inch (5-10 mm) from the outside wall.
The sleeve is threaded for adjustment.
Adjust the sleeve length to wall thickness
plus 3/16 - 3/8 inch (5-10 mm).
NOTE: Do not extend beyond the red line.
For other than the "S" type flue manifold, if a
shorter length is necessary an extension can
be removed. Cut the outer plastic laminate
(with a utility knife or similar) and remove the
extension. The metal should not be cut.
Figure 13
Terminal
Sleeve
Remove extension
if necessary
17