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DV425TR DIRECT VENT ROOM HEATER
02/01 Page 40 250-5533
Step 1.
Before cutting any holes, assemble the desired sections of direct vent pipe to determine the center
of the masonry penetration.
Step 2.
Once the center point of the penetration has been determined, cut a 6” (152mm) diameter hole in the
masonry. If the hole is too large, the retro connector might not mount properly; if the hole is too small, the
appliance might starve for intake air. If there is a frame wall in front of the masonry wall, cut and frame a
10” (254mm) square opening in the wall (centered around the 6” [152mm] masonry opening). If there is sheet
rock only (no studs) in front of the masonry the 10” (254mm) opening is still needed, but does not need to be
framed. This allows the retro connector to mount directly on the masonry and provide the correct clearances
to combustibles (see Figure 22).
VERTICAL INSTALLATION, cont.
INSTALLATION INTO AN EXISTING MASONRY CHIMNEY
(USA ONLY)
Fig. 22
NOTE: FOR HEARTH
APPLICATIONS REFER TO
PAGE 24 FOR THE USE
OF THE 923GCL CO-AXIAL
TO CO-LINEAR APPLIANCE
CONNECTOR.
10" x 10" FRAMED
OPENING IN WALL
STUDWALL
MASONRY
CHIMNEY
RETRO
CONNECTOR
(4) MASONRY BOLTS
(NOT INCLUDED)
WALL THIMBLE
COVER