Desa CB36N - Manual (Page 9)

www.desatech.com 117437-01D 9
INSTALLATION PRECAUTIONS
NOTICE: Failure to follow these in-
structions will void the warranty.
•. Wear. gloves. and. safety. glasses. for.
protection
• Use extreme caution when using ladders
or.when.on.roof.tops
•. Be. aware. of. electrical. wiring. locations. in.
walls.and.ceilings
The. following. actions. will. void. the. warranty.
on.this.product:
•. Installation. of. any. damaged. venting.
component
• Unauthorized modification of the venting
system. (Do. not. cut. or. alter. vent. compo-
nents)
•. Installation. of. any. component. part. not.
manufactured.or.approved.by.DESA.Heat-
ing, LLC
•. Installation. other. than. as. instructed. by.
these.instructions
WARNING: Read all instruc-
tions completely and thoroughly
before attempting installation.
Failure to do so could result in
serious injury, property damage
or loss of life.
WARNING: B-type vent pipe
airspace clearance to combus-
tibles is 1" on all sides. Where
the vent pipe passes through a
vertical wall a listed thimble ap-
proved for use with B-type vent
must be used.
VENTING INSTALLATION
A.4".B-type.venting.system.must.be.connected.
to.the.appliance.for.venting.to.the.outside.of.
the.building.
The.following.section.is.provided.as.a.guide.to.
install.a.standard.B-type.vent.installation.
Standing. code. requirements. concerning.
B-type. vent. installations. may. vary. within.
your state, province or local codes jurisdic-
tion. Therefore, it is recommended that you
check.with.your.local.building.code.authority.
for specific requirements or in absence of
local codes, follow Section 7.0 of the cur-
rent.National Fuel Gas Code NFPA 54/ANSI
Z223.1. or. in. Canada. with. CAN/CSA B149.
for. Category. I. systems. using. double. wall.
B-1.vent.pipe.
This. gas. appliance. must. be. vented. to. the.
outdoors.only.and.may.not.be.terminated.into.
an attic space or into a chimney flue servicing
a.solid.fuel.burning.appliance.
This. appliance. may. be. vented. through. a.
manufactured.chimney.liner.system.if.all.are.
listed, inspected and approved by local codes
and/or.building.authorities.
The examples shown in Figure 10, page 10,
are. typical. of. most. B-vent. installations. and.
code.practices.
WARNING: This gas fireplace
and vent assembly must be vented
directly to the outside. The venting
system must NEVER be attached
to a chimney serving a separate
solid fuel burning appliance.
Example 1:.Shows.the.minimum.allowable.sys-
tem.height.and.lateral.offset.for.a.60°.or.greater.
inclination. Code specifies that offsets at 60° or
greater are considered horizontal and must fol-
low.the.75%.rule.for.lateral.to.total.vertical.sys-
tem.height..Codes.also.allows.only.one.offset.
in.the.total.system.when.at.60°.or.greater..The.
total.vertical.height.in.this.example.represents.
the.minimum.height.of.8.feet.and.therefore.the.
allowable.lateral.is.6.feet.when.the.75%.rule.
applies..If.the.lateral.length.must.exceed.75%.
then the system must be sized in accordance
with.the.Category.I.venting.tables.
Example 2:.Shows.multiple.offsets.each.at.
45°.of.inclination..Multiple.offsets.are.permit-
ted.if.they.do.not.exceed.45°.of.inclination..
The. total. lengths. of. the. two. offsets. are. not.
required.to.meet.the.75%.rule.
Example 3:. Shows. a. single. offset. at. 45°. of.
inclination.and.therefore.the.lateral.length.at.10.
feet.of.offset.does.not.have.to.meet.the.75%.
allowable.rule.