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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

16

RETURN ELBOW ASSEMBLY

Return elbows install the same way as round
terminations and stabilizers:

Step 1. Hold return elbow over top of last
chimney section.

Step 2. Center inner slip section into inner flue
pipe-slip down.

Step 3. Center outer locking section over outer
chimney pipe-push down until locking joint has
firmly engaged.

Step 4. Pull up slightly on return elbow to
ensure locking joint has firmly engaged.

Step 5. Secure support straps to framing
members by nailing under tension in sheer
(

Figure 49 ).

The offset and return elbows may be attached
together, or a section or sections of chimney
may be used between, but do not exceed 20'
(6.1 m) in total length between elbows (

Figure

44  ). If sections of pipe exceed 10' (3 m)
between elbows, a chimney stabilizer must be
used at the midpoint. The stabilizer support
straps must be attached under tension (in
shear) to structural framing members above.
When two sets of offset elbows are used, the
maximum combined length of chimney used
between elbows cannot exceed 20' (6.1 m)
(

Figures 45 and 46 ).  Example: If C

1 

= 10' (3m)

then C

2

 cannot exceed 10' (3 m).

If an offset exceeds 6' in length, each chimney
joint beyond the first 6' of offset to the return
elbow, must be secured by a No. 8 x 

¹⁄₂

" sheet

metal screw located at the underside of the
joint (

Figure 47 ).

Figure 47

A 

¹⁄₈

" (3 mm) diameter hole must be drilled in

the chimney joint using a 

¹⁄₈

" (3 mm) diameter

drill. Hole should be drilled in center of joint
overlap (

Figure 48 ). Be sure to drill only through

the outer chimney casting. Do not puncture the
inner flue.

Figure 48

Return elbow support straps must be securely
attached under tension (in shear) to structural
framing members above.

OFFSET CALCULATIONS

1.  Use Offset Chart to determine amount of
horizontal offset (A) and height (B) for various
chimney sections.

2.  Use “Height of Chimney Only” column to
determine combinations of pipe used above
return elbow to achieve desired heights. Refer-
ence Components Effective Height Chart in
vertical elevation chart section.

3. Use Elevation Chart as job estimator only.
Add necessary firestop spacers and stabilizers
as required. Firestop spacers must be used as
shown in 

Figures 29 and 30 and stabilizers as

shown in 

Figure 35.

INSTALLING OFFSETS

First, review Offset Elevation Chart and 

Figure

43 on page 15 for reference.

Step 1. Determine the offset distance where
chimney is to pass through the first ceiling-
dimension “A.” To find this point on your ceil-
ing, first determine the center point for a verti-
cal chimney following the instructions for ver-
tical installation.

Measure height to the ceiling from the top of
fireplace-dimension “B.” Use Offset Elevation
Chart to find dimension “A.” Mark point where
you will drive your nail to show the center point
for your offset ceiling cut.

Step 2. Proceed by using the Straight Up Instal-
lation Instructions for cutting and framing ceil-
ing and roof openings.

Note: See “Framing and Dimension” Chart for
the sizes of the ceiling and roof openings. The
size of the roof opening varies with the degree
of pitch of the roof.

OFFSET ELBOW ASSEMBLY

Offset elbows install the same as chimney
sections. First, snap the inner section INTO the
preceding inner section of flue. Check connec-
tion by pulling up slightly to ensure a tight fit.
Next, the outer sections snap locks OVER the
preceding outer section of chimney. Again,
check outer section by pulling up slightly to
ensure proper connection is made.

Figure  49

Note: The return elbow assembly performs the
same function as a stabilizer. Consider this
when determining the need for a stabilizer.

Note: Do not apply excessive pressure to any
subsequent chimney section following return
elbow assembly when installing. Ensure sub-
sequent chimney sections are securely attached
by testing as noted above.

CHIMNEY OFFSET 30

°

 THROUGH FLOOR

OR CEILING

It may be necessary to assemble the chimney
at 30

°

 when passing through the floor or

ceiling area.  Use the F8FS30-2 firestop spacer
as shown in 

Figures 50 and 51.

Support the chimney at floor or ceiling pen-
etration with a FTF8 stabilizer if distance of
chimney below ceiling is 10' (3 m) or more.
Maintain 2" (51 mm) minimum air space to
combustibles from chimney sections.  The
chimney must pass vertically through the
attic space.

Chimney

Section

Joints

No. 8 x 

¹⁄₂

" SMS

Screws Required at

Ever

y Joint Past 6'

No Screws Required in

Joints for First 6' of Offset

4'

6'

Underside of Chimney

Return Elbow

Maximum offset of the chimney system is 30

°

.

Two offset elbows must not be assembled to
form a 60

°

 offset. However, two sets of offset

and return elbows may be used on a single flue
system, provided the total height of the system
exceeds 25' (7.6 m).

Содержание Merit CPF-38

Страница 1: ...ts components under any circumstances Any modification or alteration of the fireplace system including but not limited to the fireplace chimney components and accessories may void the warranty listings and approvals of this system and could result in an unsafe and potentially dangerous installation IMPORTANT TO ASSURE PROPER ALIGNMENT OF GLASS DOORS INSTALL THIS FIREPLACE IN A SQUARE AND PLUMB CON...

Страница 2: ...port normalcombustion Fireplacesconsumelarge volumes of air during the normal combustion process In the event the home is tightly sealed with modern energy efficient features the op tional combustion air kit may not provide all the air required to support combustion TABLE OF CONTENTS Safety Rules page 2 Tools and Building Supplies page 2 Precautions page 3 Introduction page 3 Chimney Mantel Cleara...

Страница 3: ...ire Protection Standard for chimneys fireplaces and solid fuel burning appliances NFPA 211 andinaccordancewithcodessuchastheBOCA Basic National Codes the Standard Mechani cal Code and the Uniform Building Codes The CST and CPF systems consists of four subsystems 1 The Fireplace and Door Assemblies 2 The Chimney and Termination 3 The Optional Combustion Air Kit 4 The Chimney Air Kit Canada Only CLE...

Страница 4: ...e insulated between the solid continuous floor beneath the fireplace and the chase bot tom Chase insulation in a cold climate installa tion is not required for safety ASSEMBLY OUTLINE Before You Start Check your inventory list to be sure you have all the necessary parts supplied in good usable condition Checkalsoforanyconcealeddamage Checktheoperationofthedamper Thedamper is controlled through the...

Страница 5: ...room from under the fireplace The fireplace may be positioned and then the framing built around it or the framing may be constructed and the fireplace positioned into the opening Usually no special floor support is needed for the fireplace however to be certain 1 Estimate the total weight of the fireplace system including chimney and surround ma terials such as brick stone etc to be in stalled Shi...

Страница 6: ...ure 9 Figure 8 Metal Safety Strips 2 Min 51 mm Platform Metal Safety Strips 2 Min 51 mm Figure 11 Figure 10 2 Min 51 mm Special Z Metal Safety Strips 2 Min 51 mm Figure 12 4 x 6 Header Spacer 2 x 4 False Header Figure 14 Figure 13 IMPORTANT UNDER NO CIRCUMSTANCES CAN THE FIREPLACE TOP SPACERS FIGURE 12 BE REMOVED OR MODIFIED NOR MAY YOU NOTCH THE HEADER TO FIT AROUND OR BE INSTALLED LOWER THAN THE...

Страница 7: ...eft Front View Model CPF 38 Front View Model CST 38 Top View End View 12 318 mm 48 1238 mm 8 217 mm 3 98 mm 42 1080 mm 8 224 mm Combustion Air 12 318 mm 48 1238 mm 10 267 mm 5 146 mm 21 533 mm 5 133 mm 32 813 mm 39 997 mm 38 965 mm 12 318 mm 48 1238 mm 10 267 mm 5 146 mm 21 533 mm 5 133 mm 32 813 mm 39 997 mm 38 965 mm ...

Страница 8: ...AMING SPECIFICATIONS Figure 20 7 Min 178 mm 24 614 mm Maximum 49 1245 mm 4 x 4 Header 2 x 4 False Header Optional 39 997 mm Maximum 42 1086 mm Dimensions Calculated For 1 2 Drywall 42 1086 mm 7 Min 178 mm 42 1086 mm 49 1245 mm 40 1022 mm 4 x 4 Header 2 x 4 False Header Optional 24 614 mm Maximum Dimensions Calculated For 1 2 Drywall 42 1086 mm 49 1245 mm 49 1245 mm ...

Страница 9: ... Figure 24 Framing Dimensions for Ceiling Ceiling Opening Flue Type A B FTF8 Vertical 16 16 at 2 51 mm 419 mm 419 mm FTF8 Offset 16 27 At 2 51 mm 419 mm 686 mm Figure 25 Framing Dimensions for Roof FTF8 at 2 51 mm Pitch C D 0 12 16 16 419 mm 419 mm 6 12 16 19 419 mm 483 mm 12 12 16 23 419 mm 597 mm CST Wall Types CPF Wall Types Perpendicular to Roof Ridge C Type Wall T Type Wall L Type Wall H Type...

Страница 10: ...rd Ensure nothing blocks the hood opening Do not terminate the duct hood higher than the chimney Step 8 Cut or frame a hole through the outside wall for the installation of the duct inlet hood A 4 114mm diameterholeissufficient Feed the loose end of the flexible air duct through the holecutfortheinlethoodandattachtocollaron inlet hood using two 2 No 6 x screws provided Insert hood into opening Sec...

Страница 11: ...1 This installation is Warnock Hersey Inc listed only for use in Canada Figure 31 Step4 Note Chimneysectionsareconstructed with a unique locking tab design which en sures an immediate tight assembly between sections Plan your chimney requirements carefully before assembly as chimney is diffi cult to disassemble after installation If disas sembled the tabs might become damaged Be certain tabs are p...

Страница 12: ...se rests flat on the roof Figure 36 Again check the vertical position of the chimney and the 2 51 mm minimum air space to combustibles Note Do not caulk or seal the ventilating openings Figure 38 Step 9 Security Chimneys locking band Model FLB may be required if the chimney extends too high above the roof flashing As a general rule if the chimney extends more than 6 1 8 m above the roof flashing t...

Страница 13: ...MNEY COMPONENT CALCULATIONS The minimum installed height of the CST and CPF fireplace systems including fireplace and chimneycomponents is15 4 6m 25 7 6m with two offsets The maximum system height is 80 24 4 m To determine the number of chimney sections and chimney components required follow these steps 1 Determine total vertical height of the fire place installation This dimension is measured fro...

Страница 14: ...y Only Chimney Lengths Chimney Only Inches Feet Inches 12 18 36 48 MM M Height Of Number Of FTF8 Height Of Chimney Only Chimney Lengths Chimney Only Inches Feet Inches 12 18 36 48 MM M 252 21 0 2 0 0 5 6401 6 40 258 21 6 1 1 0 5 6553 6 55 266 22 2 0 0 1 5 6756 6 76 276 23 0 1 0 1 5 7010 7 01 278 23 2 0 0 0 6 7061 7 06 282 23 6 0 1 1 5 7163 7 16 288 24 0 1 0 0 6 7315 7 32 294 24 6 0 1 0 6 7487 7 49...

Страница 15: ...0 1 4 0 0 1054 2045 43 83 1 0 1 0 2 0 1099 2127 44 85 1 0 0 0 1 1 1124 2165 45 87 1 0 0 3 1 0 1149 2223 46 89 1 0 0 1 2 0 1175 2261 48 91 1 0 2 0 2 0 1226 2324 49 94 1 0 1 0 1 1 1251 2394 50 95 1 0 0 0 0 2 1276 2432 51 97 1 0 1 1 2 0 1302 2483 54 103 1 0 0 2 2 0 1378 2616 55 104 1 0 1 0 0 2 1403 2654 56 106 1 0 2 1 2 0 1435 2705 58 109 1 0 0 1 0 2 1480 2788 62 116 1 1 1 0 3 0 1588 2965 65 122 1 1 ...

Страница 16: ...view Offset Elevation Chart and Figure 43 on page 15 for reference Step 1 Determine the offset distance where chimney is to pass through the first ceiling dimension A To find this point on your ceil ing first determine the center point for a verti cal chimney following the instructions for ver tical installation Measure height to the ceiling from the top of fireplace dimension B Use Offset Elevati...

Страница 17: ... IT IS NECESSARY TO ORDER AND INSTALL THE DOOR STYLE OF YOUR CHOICE GLASSDOORSARENOTOPTIONAL CAUTION REMOVE THE PLASTIC PROTEC TIVE COATING FROM THE DOORS BRASS PIECES BEFORE ASSEMBLY AND INSTALLA TION FAILURE TO REMOVE THE COATING BEFORE FIRST USE WILL RESULT IN DAM AGE TO THE BRASS FINISH Make a careful inspection of all parts before installing the doors to insure they are undam aged and complet...

Страница 18: ...2 51 mm air space must be preserved for all materials extending for any continuous length adjacent to the chimney It is especially important to insulate between the studs of an outside chase cavity and under the floor if the floor is above ground level Do not place insulation directly against the fire place or chimney system FIREPLACE FINISHES Mantels and Trim It is sometimes best to frame your fi...

Страница 19: ...4 Cultered Stone Hearth stone 2 82 355 3 36 3 3 8 Wonderboard 3 23 31 3 85 3 7 8 Super Firetemp M Johns Manville 61 1 64 73 3 4 Super Firetemp L Johns Manville 54 1 85 64 5 8 Face brick 9 00 111 10 71 10 3 4 Common brick 5 00 20 5 95 6 Cement mortar 5 00 20 5 95 6 Ceramic tile 12 5 08 14 88 14 7 8 Marble 11 09 13 10 13 1 8 Table 1 Methods of Determining Hearth Extension and Wall Shield Equivalents...

Страница 20: ... 3 1 2 dimension is the height R for the common brick becomes brick R M rM x TS 0 20 x 3 1 2 70 Using 1 2 of mortar to set the brick R for the mortar is calculated as follows mortar R M rM x TS 0 20 x 1 2 10 Next a 3 4 marble slab set in 1 2 mortar cov ers the brick R for the marble and mortar becomes marble R M rM x TS 0 05 x 3 4 038 mortar R M rM x TS 0 20 x 1 2 10 The sum of all R values is 70 ...

Страница 21: ...1991 215 lbs CPF 38 052011 210 lbs Figure 60 Figure 61 8 203 mm 11 289 mm 30 Combustible Materials Allowed in Shaded Area 1 25 mm Minimum Distance to Protected Side Wall 4 118 mm 18 457 mm Minimum Distance to Unprotected Side Wall Model CST 38 8 203 mm 30 Combustible Materials Allowed in Shaded Area 1 25 mm Minimum Distance to Side Wall Model CPF 38 ACCESSORIES AND COMPONENTS 63L10 FTF8 12 63L13 F...

Страница 22: ...mination 96L20 FTF8 CTT Arch Type Termination 96L22 FTF8 ATT Pyramid Chase Termination 63L48 FTF8 CT1 Square Chase Termination 63L51 FTF8 CT2 Round Chase Termination 63L45 FTF8 CTDT Attic Shield Firestop Spacer Canadian 63L67 FTF8 FSAS Outside Combustion Air Kits with duct 81L87 FOAK without duct 81L88 FOAK LD 12M07 36 ABF All GlassTM 12M08 36 ABF BB Bi Fold Doors 12M09 36 ABF BS ...

Страница 23: ...NOTE DIAGRAMS ILLUSTRATIONS NOT TO SCALE 23 NOTES ...

Страница 24: ... 850 049M REV N C 01 2007 The manufacturer reserves the right to make changes at any time without notice in design materials specifications prices and also to discontinue colors styles and products Consult your local distributor for fireplace code information 1110 West Taft Avenue Orange CA 92865 ...

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