&
>L@=@=9L=JF==<KLG:=K=;MJ=<LGL@=?JGMF<MK=
L@=@GD=KAFL@=9F;@GJAF?D=?KGFL@=@=9L=J
Clearances
Indoor Installations
4@=FAFKL9DD=<9;;GJ<AF?LGL@=DAKL=<EAFAEME;D=9J
9F;=K >JGE ;GE:MKLA:D= ;GFKLJM;LAGF L@=K= @=9L=JK
;9F:=K=JNA;=<OAL@GMLJ=EGNAF?H=JE9F=FLKLJM;LMJ
9D;GFKLJM;LAGF 9JGMF<L@=@=9L=J%GO=N=J >GJ=9K=
G>K=JNA;AF?O=J=;GEE=F<9;D=9J9F;=G>9LD=9KL
AFAF>JGFL9LD=9KLAFGFL@=J=9J9F<AF9:GN=
L@=LGHG> L@=@=9L=J1@AKOADD9DDGO L@=@=9L=JLG :=
K=JNA;=<AFALKAFKL9DD=<DG;9LAGFOAL@GMLEGN=E=FLGJ
J=EGN9DG>L@=@=9L=J
0=JNA;= ;D=9J9F;=K D=KK L@9F L@= EAFAEME E9Q
J=IMAJ=J=EGN9DG>L@=@=9L=JLGK=JNA;==AL@=JL@=@=9L
=P;@9F?=JGJL@= :MJF=J;GEHGF=FLK&F =AL@=J;9K=
L@= @=9L=J EMKL := AFKL9DD=< AF 9 E9FF=J L@9L OADD
=F9:D=L@=@=9L=JLG:=K=JNA;=<OAL@GMLJ=EGNAF?9FQ
KLJM;LMJ=9JGMF<L@=@=9L=J
Outdoor Installations
1@=K=@=9L=JK9J=<=KA?F;=JLA>A=<>GJGML<GGJAFKL9DD9
LAGF%=9L=JKEMKLFGL:=AFKL9DD=<MF<=J9FGN=J@9F?
MFD=KK;D=9J9F;=K9J=AF9;;GJ<9F;=OAL@DG;9DAFKL9D
D9LAGF;G<=K9F<L@=J=IMAJ=E=FLKG>L@=?9KKMHHDA=J
1@J==KA<=KEMKL:=GH=FAFL@=9J=9MF<=JL@=GN=J
@9F? /GG> O9L=J <J9AF9?= EMKL := <AN=JL=< 9O9Q
>JGE@=9L=JKAFKL9DD=<MF<=JGN=J@9F?K
Equipment Base
The heater must be mounted on a level, structural-
ly sound surface. 1@= @=9L=J AK 9HHJGN=< >GJ
AFKL9DD9LAGFGF9;GE:MKLA:D=KMJ>9;=:MLEMKL+"3"/
:= AFKL9DD=< GF ;9JH=LAF? $9K>M=D=< =IMAHE=FL
AFKL9DD=<AF=F;DGK=<H9JCAF??9J9?=KEMKL:=DG;9L=<
9LD=9KLAF9:GN=L@=>DGGJ
&F9<<ALAGFL@=@=9L=JK@9DD:=AFKL9DD=<KM;@L@9LL@=
?9K A?FALAGF KQKL=E ;GEHGF=FLK 9J= HJGL=;L=< >JGE
O9L=J<JAHHAF? KHJ9QAF?J9AF=L; <MJAF?9HHDA9F;=
GH=J9LAGF GJ K=JNA;= ;AJ;MD9LGJ J=HD9;=E=FL ;GFLJGD
J=HD9;=E=FL=L;
Table D: Clearances — Indoor Installations
INSTALLATION
Installation Codes
&FKL9DD9LAGFKEMKL>GDDGOL@=K=;G<=K
T )G;9DKL9L=HJGNAF;A9D9F<F9LAGF9D;G<=KD9OK
J=?MD9LAGFK9F<GJ<AF9F;=K
T +9LAGF9D#M=D$9K G<=+0&7+#-Y
D9L=KL=<ALAGF+#$
T +9LAGF9D "D=;LJA;9D G<= +0&+#- D9L=KL
=<ALAGF+"
T 0L9F<9J< >GJ GFLJGDK 9F< 09>=LQ !=NA;=K >GJ
MLGE9LA;9DDQ #AJ=< GAD=JK +0&0*" 0!
0!O@=FJ=IMAJ=<
T #GJ 9F9<9 GFDQ + 0 +9LMJ9D $9K
9F< -JGH9F= &FKL9DD9LAGF G<= 9F< 0
" -9JL
!,+,1AFKL9DDGF;9JH=LAF?
CAUTION: 1@AK:GAD=JK@GMD<:=DG;9L=<AF9F9J=9
O@=J=O9L=JD=9C9?=OADDFGLJ=KMDLAF<9E9?=LGL@=
9J=99<B9;=FL LGL@= 9HHDA9F;=KGJ LGL@= KLJM;LMJ=
4@=F KM;@ DG;9LAGFK ;9FFGL := 9NGA<=< AL AK
J=;GEE=F<=<L@9L9KMAL9:D=;9L;@H9F9<=IM9L=DQ
<J9AF=< := AFKL9DD=< MF<=J L@= 9HHDA9F;= 1@= H9F
EMKLFGLJ=KLJA;L9AJ>DGO
Heater
Side
Min. Clearances
from Combustible
Surfaces
Minimum
Service
Clearances
#DGGJ \ \
/=9J \ \
/A?@L0A<= \ \
)=>L0A<= \ \
1GH \ \
#JGFL ,H=F \
3=FL \ \
CAUTION: 1@=:GAD=JEMKL:=EGMFL=<GF9D=N=D
:9K=LG9DDGO;GF<=FK9L=LG<J9AFHJGH=JDQ>JGEL@=
@=9L =P;@9F?=J The condensate is acidic and
highly corrosive.
NOTE: 1@= >GDDGOAF? AFKLJM;LAGFK 9J= AFL=F<=< >GJ
KAEHD= 9HHDA;9LAGFK #GJ EGJ= <=L9AD=<
;GF>A?MJ9LAGFK 9F< K=LMH ;GFKMDL L@= 3"/0 &
GFLJGD&,*9FM9D 9L9DG?
NOTE: 1@= LGH B9;C=L G> L@= :GAD=JAKKDGH=< >JGE
>JGFLLGJ=9J