Lennox Hearth MLDVTCD-35NM Burner User Manual


  Open as PDF
of 38
 
23
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOXHEARTHPRODUCTS•MERIT
®
SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MODELMLDVTCD-35•INSTALLATIONINSTRUCTIONS
D. Install Firestop / Spacers at ceilings and walls
- When Secure Flex penetrates a wall or ceiling,
a firestop / spacer is required: use the SF4.5 VF
firestop / spacer for ceilings and the SF4.5 HF
firestop / spacer for walls. See the appropriate
sections and Figures shown throughout the vent-
ing section for their installation requirements.
APPLY ONLY MIL-PAC BLACK
HIGH TEMPERATURE SEALANT
(Cat. No. 10K81) to the outside
surface of both collars of the
adapter (be especially careful to
fill the grooves of the outer collar
to be covered by the flexible pipe)
and slide flexible pipe over inner
and outer adapter collars.
1 3/4 inch (44 mm) Flexible
Pipe and Adapter Outer Collar
Overlap
Adapter (SV4.5RF)
Attach adaptor to appliance
Collar, or secure vent sections
Flex Vent
Gear Clamps
Securing Screw
- 3 places, 120° apart
(equally spaced) just
below gear clamp
1 3/4 in. (44 mm) Flexible
Pipe and Adapter Inner Collar
Overlap
VERTICAL OR HORIZONTAL VENTING USING
 KITS AND COMPONENTS
Secure Flex™ venting kits and components
may be used in any venting application in place
of rigid Secure Vent™ (SV4.5) direct-vent
components. All restrictions, clearances and
allowances that pertain to the rigid piping apply
totheexibleventing.Secure Flex kits may
not be modified; also, under no circumstances
may separate sections of flex pipe be joined
together.
Using adapter (SV4.5RF), Secure Flex kits
may be added to the end of a vent run made
up of rigid Secure Vent (SV4.5) vent sections
provided that doing so does not violate any of
the venting length, height, routing, horizontal
to vertical ratio requirements or clearance
considerations detailed in this manual.
Secure Flex kits come with an adapter that
can be fitted to the inclined channel end of
the last Secure Vent (SV4.5) vent section in a
rigid system in the exact same fashion as any
other Secure Vent section. Align the dimpled
end of the adapter over the previously installed
section or appliance collar, adjusting the radial
alignment until the four locking dimples of the
adapter are aligned with the inlets of the four
incline channels of the last vent section or collar.
Push on the adapter until it fully engages, then
twist the adapter clockwise running the dimples
down and along the incline channels until they
seat at the end of the channels.
Attach the flexible vent to the adapter as fol-
lows (see also Figure 33):
A. Install the Inner Flex Pipe -
1. Install the small gear clamp loosely around
theinnerexibleventpipe,pushitbackout
of the way.
2. Apply a bead of Mill-Pac Black (700° F) high
temperature sealant - Catalog No. 10K81
to the inner adapter collar, approximately
1/2 inch from the end.
3.Pullandextendtheinnerexibleventpipe.
4.Slidetheinnerexpipeovertheadaptercol-
lar.Ensuretheexibleventpipecompletely
engages the adapter collar to a distance of 1
3/4 inches from the end, and that it is free
from damage or tears.
5. Slide the gear clamp down and tighten it
fullytosecuretheexibleventtotheadapter
inner collar approximately 3/4 inch from the
endoftheex.
6. Install three screws, 120 degrees apart,
throughtheexibleventpipeandintothe
adapter collar just below the gear clamp to
provide additional security to the connec-
tion.
B. Install the Outer Flex Pipe -
1. Install the large gear clamp loosely around
theouterexibleventpipe,pushitbackout
of the way.
2. Apply a bead of Mill-Pac Black (700° F, high
temperature sealant - Catalog No. 10K81)
to the outer adapter collar; to the grooves
of the collar which extend approximately 1
inchfromtheendandtotheatsurface,
approximately 1-3/8 inches from the end.
3.Pullandextendouterexibleventpipe.
4.Slidetheouterexpipeovertheadaptercol-
lar.Ensuretheexibleventpipecompletely
engages the adapter collar to a distance of
1-3/8 inches from the end, and that it is free
from damage or tears.
5. Slide the gear clamp down and tighten it
fullytosecuretheexibleventtotheadapter
outer collar approximately 3/4 inch from the
endoftheex.
6. Install three screws, 120 degrees apart,
throughtheexibleventpipeandintothe
adapter collar just below the gear clamp to
provide additional security to the connec-
tion.
C. Route Flex Vent -
Ensurethattheexventisproperlyroutedto
provide the required clearance. Do not allow the
exibleventtobendinaradiustighterthan5"
(127 mm). Refer to Figure 34. Space out the
internalexventspacersevenly-approximately
every 6 inches - and avoid kinking of inner pipe.
Supporthorizontalsectionsofexwithmetal
straps at 2 foot (0.61 m) intervals.
E. Attach Flex Vent to Termination -
Secure Flex components can be purchased
separately and attached to bulk lengths of Se-
cure Flexexibletubingcuttosizeatthejob
site.SecuretheexibleventtotheSecure Flex
terminations in the same manner (see Figure
33) as it was attached to the adapter.
Note: Secure Flex vent must be attached to Se-
cure Flex terminations only. DO NOT substitute
Secure Vent terminations or the Secure Vent
adapter for Secure Flex components. The col-
lars of Secure Flex terminations and adapters
have a different diameter than that used with
the Secure Vent pipe. Additionally, Secure Flex
components have an extended length center
tube for use in attaching the flexible vent.
Figure 33
Flexible Vent
Section
5” (127 mm)
Radius
Minimum
Figure 34
NOTE: Outer pipe is pulled away to
show the detail of the inner pipe.
Securing Screw - 3 places,
equally spaced, just below
gear clamp.
 previous next