Quadra-Fire 31ST-ACC 用户手册

March 2, 2007

7033-277C

Page  17

R

Site constructed for masonry chimney installation:

  •  A minimum length of 12 inches [305mm] (longer for 

thicker walls) of solid insulated factory-built chimney 
length constructed to UL 103 Type HT 8 inch (203mm) 
inside diameter.  Chimney needs to extend a minimum 
of 2 inches (51mm) from the interior wall and a mini-
mum of 1 inch (25mm) from the exterior wall.

  • Wall spacer, trim collar and wall band to fi t solid pack 

chimney selected.

  •  Minimum 8 inch (203mm) diameter clay liner section (if 

not already present in chimney) and refractory mortar.

 •  Masonry chimney clearance must meet NFPA 211 mini-

mum requirement of 2 inches (51mm) to sheet metal 
supports and combustibles.

 •  Minimum of 1 inch (25mm) clearance around the chim-

ney connector.

 • Top of wall opening is a minimum of 13-1/2 inches 

(343mm) from ceiling or 4-1/2 inches (114mm) below 
minimum clearance specifi ed by chimney connector 
manufacturer.  NFPA 211 minimum vertical clearance of 
18 inches (457mm) from chimney connector and ceil-
ing or minimum recommended by chimney connector 
manufacturer.  Figure 17.1.

1.  Open inside wall at proper height for the chimney con-

nector to entry the masonry chimney.  Figure 17.1

2.  Entry hole to masonry chimney must be lined with an 8 

inch (203mm) minimum diameter clay liner, or equiva-
lent, secured with refractory mortar.

3.  Construct a 17 inch x 17 inch (432mm x 432mm) out-

side dimension frame from 2 x 2 framing lumber to 
fi t into wall opening.  Inside opening of frame should 
be no less than 14 inch x 14 inch (356mm x 356mm).  
Figure 17.1.

4.  Attach the wall spacer to the chimney side of the 

frame.

5.  Nail the frame into the wall opening.  The spacer should 

be on the chimney side.

6.  Insert the section of the solid insulated chimney into 

the outer wall of the masonry chimney.

7.  Tightly secure the length of the solid insulated chimney 

with the wall band to the masonry chimney.

8.  Insert a section of chimney connector into the chimney.  

Make sure it does not protrude past the edge of the 
clay chimney liner inside the chimney.

9.  Seal the end of the chimney connector to the clay liner 

with refractory mortar.

10.  Install trim collar around the sold pack chimney section.

Trim Collar 

Chimney Section 

with 2 inch 

(51mm)

Clearance to 

Combustibles

Chimney

Connector

Fire Clay Flue 

Liner

with Airspace 

Masonry

 Chimney 

Wall Band to 

Secure Chimney 

Section

Wood Studs Used 

for Framing - Spaced 

2 inch (51mm) 

clearance from 

Masonry Chimney

Wall Spacer 

Fire Risk.
Do NOT pack insulation or other combustibles between 
spacers.
•  ALWAYS maintain specifi ed clearances around vent-

ing and spacers.

•  Install spacers as specifi ed.
Failure to keep insulation or other material away from 
vent pipe may cause fi re.

1.5”

1.0” 

2.0”

2.0”

1.5”

14.0” ID

17.0” OD

ceiling

Minimum18.0” 

NFPA 211

13.5” below ceiling to top 
of opening

1.0”

8.0”

1.5   2x2 framing stud

2.0   min air clearance

1.0   min air clearance
4.5

or top of opening is a min.of 
4.5” below min.clearance 
specified by connector mfg.

Center of Hole

Thimble

Wall

Include depth 
of hearth pad