Dunkirk XEB-3 Installation, Operation & Maintenance Manual page 16

INDUCED DRAFT HIGH EFFICIENCY BOILERS
Maximum Horizontal Vent Length For StainlessSteel VentPipe - 30'
Plus One 90° Elbow PlusVent Terminal.
Minimum Horizontal Vent Length - 2' Plus One 90° ElbowVent
Termination.
Additional elbowsare equivalent to 6 feet of straight pipe for 4" di-
ameter 90° elbowor 3 feet of straight pipe for 3" diameter 90° elbow.
2, 3, 4, 5, Section Boilers use 3"vent pipe; for 6, 7 SectionBoilers use
4"vent pipe.
CHOICE OF VENT PIPE MATERIAL
1. U.L. ListedZ-FlexZ-Vent Stainless SteelVent Pipe.
2. U.L.Listed Heat-Fab Saf-T-Vent Stainless SteelVent Pipe.
3. U.L. ListedFlex-LStar-34StainlessSteelVent Pipe.
4. U.L. ListedProTechSystemsFasNSeal S tainlessSteelVent Pipe.
Figure 10 - Induced Draft High Efficiency boilers
Optional Termination Fitting
T Jemlund S_de Wall Vent Hood
VHolo3"for 2, 3, 4& 5 Section Boilers
VH-I_4" for 6 & 7 Section _i|ers
Termination Fitting
_° Elbow, pointing down, same matetiai and
pipe size as venting systems equtped with
screen (Min, I/4" Mesh) to keep birds outs
Fot a combustib|e wa|l, use a thimb|e_ Select as
fo|iows:
Vent Pipe: Z-Vent, SafoT_Vent, Star 34
_tmble: Simpson Duravent Thimb|e --
# 3G_¢_,/T(3% # 4GV_t#T (4")
Vent Pt_: FasNSeal
Thimble: FasNSea| Wal| Thimble
#FSWT03-3'; FSWT04-4 _'
PRchDown Toward
Outside 1i4" Per Foot
Pitch Down Towa_
Outside 1/4" Per Foot
_vel