![background image](http://html.mh-extra.com/html/desa/ec18nr-pr/ec18nr-pr_owners-manual_2485858012.webp)
www.desatech.com
119162-01H
12
INSTALLATION
Continued
INSTALLING DAMpER CLAMp
ACCESSORY FOR VENTED
OpERATION
Note: When used as a vented heater, ap-
pliance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of noncombustible material.
For Massachusetts Residents Only:
.Instal-
lation.of.this.gas.log.set.as.a.vented.appliance.
in.the.Commonwealth.of.Massachusetts.re-
quires.the.damper.be.permanently.removed.
or.welded.in.the.fully.open.position.
If your heater is a manually-controlled model,
you.may.use.this.heater.as.a.vented.product..
There. are. three. reasons. for. operating. your.
heater.in.the.vented.mode.
1. The fireplace does not meet the clearance
to. combustibles. requirements. for. vent-
free.operation.
2.. State.or.local.codes.do.not.permit.vent-
free.operation.
3.. You.prefer.vented.operation.
If reasons number 1 or 2 above apply to you,
you must permanently open chimney flue
damper..You.must.install.the.damper.clamp.
accessory (to order, see
Accessories
, page
37)..This.will.insure.vented.operation.(see.Fig-
ure.10)..The.damper.clamp.will.keep.damper.
open.. Installation. instructions. are. included.
with.clamp.accessory.
See chart below for minimum permanent flue
opening. you. must. provide..Attach. damper.
clamp so the minimum permanent flue open
-
ing.will.be.maintained.at.all.times.
Area of Various Standard Round Flues
Diameter
Area
.
5".
20.sq..inches
.
6".
29.sq..inches
.
7".
39.sq..inches
.
8".
51.sq..inches
Chimney
Minimum permanent
Height
Flue Opening
.
6'.to.15'.
39.sq..inches
.
15'.to.30'.
29.sq..inches
Damper
Damper.
Clamp
Damper
Damper.
Clamp
Damper
Figure 10 - Attaching Damper Clamp
Manufactured Fireplace
Masonry Fireplace
INSTALLING HEATER BASE
ASSEMBLY
WARNING: You must secure
this heater to fireplace floor. If
not, heater will move when you
adjust controls. Moving heater
may cause a gas leak.
WARNING: If installing in a
sunken fireplace, special care
is needed. You must raise the
fireplace floor to allow access to
heater control panel. This will in
-
sure adequate air flow and guard
against sooting and controls be
-
ing damaged. Raise fireplace floor
with noncombustible material.
Make sure material is secure.
CAUTION: Do not pick up
heater base assembly by burn
-
ers. This could damage heater.
Only handle base assembly by
grates.
IMPORTANT:
.Make.sure.the.heater.burners.
are.level.