16
30484 Rev Q
09/04
MAXUS DIRECT VENT HEATER
Secure the shield to the framing as shown in
Figure 19.
The termination cap should overlap the vent
sections by at least 1-1/2 in. See Figure 20.
Figure 19
Interior Wall Shield
Figure 20 - Venting Through the Wall
f.
Installing the Rear-Vent Heat Shield
For rear vented appliances, a heat shield MUST
be placed 1 in. above the top of the vent between
the wall shield and the termination cap. There
are two sections of the heat shield. One section
attaches to the wall shield with two screws. The
remaining section is attached to the cap in the
same manner. The sections of the heat shield
will overlap to match the wall thickness (depth).
If the wall thickness does not allow the required
1-1/2 in. heat shield overlap (for rear vented
appliances), a DVP-HSM Extended Heat Shield
must be used. The extended heat shield will need
to be cut to the thickness of the wall and attached
to the wall shield. See Figure 21.
WARNING - RISK OF FIRE!
Always maintain minimum air space clearances
or greater around the appliance and vent sys-
tem.
The small leg on the shield should rest on the
top of the vent to properly space it from the pipe
section (this heat shield is not necessary on top
vented appliances). See Figure 20.
Figure 21
Vent Wall Shield and Termination Cap
WARNING - RISK OF FIRE!
Be sure there are no present (nor future) ob-
structions to the termination cap such as trees,
bushes, snow drifts, etc.
g.
Termination
Vent termination must not be recessed in the wall.
Siding may be brought to the edge of the cap
base.
Install the cap as shown in Figures 20 and 21.
Cap pipe sections should overlap the vent pipe
by 1-1/2 in. Caulk outside edges of cap.
Local codes may require the installation of a cap
shield (DRC-RADIUS or COOL-ADD) which
prevents anything or anyone from touching the
hot cap.
Figures 22-25 illustrate cap locations and
clearances as prescribed by current
ANSI Z223.1
and
CAN/CGA-B149 Installation Codes
.