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CWC Series
Woodburning Fireplaces
For Models:
CWC400
CWC500
Homeowner's Installation
and Operating Manual
FP583A
WMC
12/18/98
For use in U.S./Canada
Underwriter's Laboratories
Report No. MH7603
DO NOT DISCARD THIS MANUAL: Retain for future use.
87D1504 12/09 Rev. 4
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CWC Series Woodburning Fireplace Safety Information PLeASe ReAD THIS MANUAL beFORe INSTALLINg AND USINg FIRePLACe. IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions may result in a possible fire hazard and will void the warranty. Description Do not install a solid fuel burning insert or other prod- ucts not specified for use with this fireplace. The CWC Series fireplaces are solid fuel, woodburning Proposition 65 Warning
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CWC Series Woodburning Fireplace CWC400 Series Woodburning Fireplace — Circulating Model 22" (559mm) Rough Opening 47" (1194mm) Depth 11" Dia. Z\x" (13mm) (279mm) 8Z\v" 22Z\x" (210mm) (572mm) 8" Dia. (203mm) 22" (559mm) B\," Recessed (16mm) Nailing Flange Rough Opening Width 41" (1041mm) Rough Opening Z\x" Height 7Z\x" (191mm) 36B\," 40C\v" (930mm) (1035mm) Gas Line Outside Air 36" Access 7Z\x" (914mm) (191mm) 21" Gas Line Access 14B\," 9Z\x" 7C\v" (372mm) (241mm) (197mm) 35Z\x" (902mm) 3" 8
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CWC Series Woodburning Fireplace Front Width back Width Depth B A b C CWC400 33Z\x" 20Z\v" 18Z\v" (851 mm) (514 mm) (464 mm) C CWC500 39B\," 23C\," 18Z\v" (1007 mm) (594 mm) (464 mm) FP1531 Fig. 2a Hearth dimensions. FP1531 hearth dimensions Chase Installation 9/04 djt Insulation methods shown are optional Termination Cap for cold climate, not a requirement for Storm Collar unit operation. Pan Flashing Batt Insulation (cut out around firestop) Draftstop Firestop Ceiling Level Top
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CWC Series Woodburning Fireplace Chimney Requirements - Offset Installations OFFSET CHIMNEY FLUE EXIT RISE CHIMNEY SECTION IWF282 30˚ ELBOW 30° elbow Offsets RETURN IWF282 ELBOW B MBUF G A 5/26/96 1' Offset 1 ¹⁄₂' 3' 4' Rise G 30˚ 0 0 0 0 0 3" 11" OFFSET D 1 0 0 0 0 8Z\v" 20" ELBOW E RISE 0 1 0 0 0 11Z\v" 25Z\v" 6 FT. 2 0 0 0 0 13Z\x" 29Z\v" SKCS8 30˚ C 1 1 0 0 0 16Z\x" 34Z\v" SUPPORT RETURN 0 0 1 0 0 20Z\v" 40C\v" H ELBOW OFFSET 2 1 0 0 0 21C\
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CWC Series Woodburning Fireplace Planning Information Preplanning an installation is very important to ensure The Ten Foot Rule safety and to save time and money. An installer must predetermine where a fireplace will be set and how the Major U.S. building codes specify a minimum chimney chimney system will be run. height above the roof top. The “Ten Foot Rule” is a fire safety rule and not a draft rule. It is recommended that Mounting the Fireplace you always meet or exceed the “Ten Foot
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CWC Series Woodburning Fireplace Chimney Supports Installation The chimney system is supported by the fireplace for vertical chimney heights less than 30' (9 m) above the Insulating Fireplace enclosure hearth. Chimney supports are required if the vertical for Cold Climates height exceeds 30' (9 m) with SK8 chimneys or 20' (6 If you live in a cold climate, it is not required but m) with 3-wall chimneys. Locate chimney supports highly recommended that you insulate fireplace at ceiling hol
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CWC Series Woodburning Fireplace Framing Ground Framing can be constructed before or after the fire- Ground Screw place is set in place, however, most installers build the frame before setting the fireplace. Black Variable Speed Con- Frame fireplace with 2 x 4 lumber or heavier materials. Wall trol (optional) Junction Box Refer to framing dimensions in Figures 1 and 2 for (not supplied) basic fireplace specifications. NOTe: Framing should be positioned to accommo- Wire Nuts date wall cover
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CWC Series Woodburning Fireplace Chimney Centerline Chimney Set-up Since you have already preplanned the chimney run, Actual Centerpoint you should know exactly how the installation is to be accomplished - how much pipe is required, the number of elbows, if any, and type of termination to be used. 9Z\v" (235mm) CAUTION: REPORT TO YOUR DEALER ANY PARTS DAMAGED IN SHIPMENT, SPECIFICALLY CHECK THE END CONNECTION OF CHIMNEY SECTIONS AND ELBOWS. NOTe: The CWC400 may use MHSC model SK8, or Mod
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CWC Series Woodburning Fireplace Framing the Ceiling Hole Frame the ceiling chimney hole as shown in Figure 13. It is good practice to use framing lumber that is the same size as the ceiling joists; this is a requirement at Metal Safety Strips attic level. (1, 2 or 3 Pieces) The following table gives firestop spacer model num- bers: "Z" Fire- Angle of Chimney at Ceiling Safety Place Size of Chimney Vertical 30° Strip (not supplied) 8" Flue SKFS2A SKFS6A Z\x" (13mm) Plat- "SK" Series 1
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CWC Series Woodburning Fireplace Installing Outside Air Kit Inner Pipe Section An outside air kit is installed in all CWC Series Fire- Pipe Rim places. If desired, or if local codes mandate the use of an air kit, then an AK-MST is required to complete the Hem installation (from air kit to the outdoors). If the outside Lance air kit is to be used, the AK-MST MUST be installed Pipe Rim beFORe the fireplace is enclosed. Refer to the AK- MST instructions for field installation. The outside air
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CWC Series Woodburning Fireplace Attic Installation Nails (4) Attic Insula- Firestop Spacer tion Shield Nails (4 required) Joist NOTe: If the attic insulation shield is used, the firestop is not required in the attic installation. Attic Joist Ceiling Installation Base Flanges Ceiling FP263 Joist Fig. 20 Attic shield installlation (Canadian requirement). Continue Installing Pipe to Complete Run Firestop Spacer Continue attaching pipe sections to complete system IGF263 MBUF to next level alway
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CWC Series Woodburning Fireplace Cut and Frame Roof Hole Air Space Clearances Size of roof hole varies with the type of chimney ter- Combustible framing material MUST NOT mination installed. Refer to installation instructions penetrate AIR SPACE (shaded areas). provided with the chimney termination to find correct size of roof hole. There must be an air space (1Z\x" - SK8; 2" - 3-wall) between outermost portion of chimney sections and any 1Z\x" (SK8) adjacent combustible surfaces. (Combust
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CWC Series Woodburning Fireplace used below a flat mantel shelf, consult your local building Combustible 12" codes for minimum clearance from top of fireplace open- Mantel and (305mm) Finished Wall ing to bottom of mantel shelf. Trim Max. All joints (top, bottom and sides) where wall or deco- 1Z\x" Header rative facing material meets fireplace surround must (38mm) be completely sealed with a noncombustible material. Standoff 12" (305mm) Min. (Figs. 22 and 23) Noncombustible 6" Material
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CWC Series Woodburning Fireplace Secure the hearth extension to the floor to prevent shift- 1. Manville - CERAFORM 126, K=.27, ing, using trim molding or other similar means at three 1/2 inches thick (3) outer edges. Seal crack between the fireplace hearth 2. MHSC - EH2416, K = .458, and hearth extension with a noncombustible material. 1 inch thick required. (Figs. 22 and 26) Hearth Installation WARNINg: HeARTH eXTeNSION MUST be IN - STALLeD IN ACCORDANCe WITH FIgURe 24 AND A hearth e
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CWC Series Woodburning Fireplace COMMON MATERIALS AND FACTORS Wall Covering MINIMUM MATERIAL K* R Noncombustible 2x4" Header - THICKNESS Decorative Do not notch at EH2416 Facing standoffs. (MHSC) 0.458 1.09 0.50 in.** Seal all cracks between fireplace surround and wall Common Brick 0.10 5.46 in.** 5.0 materials with noncombustible material. R Value is for 1/2 inch. * Units of K = BTU/SQ FT/HR /˚F/IN Noncombustible ** Thickness of Listed Material Decorative FP533AD
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CWC Series Woodburning Fireplace Installing Line for gas Logs Hole in Outer Casing Fireplace Top View MHSC fireplaces are designed to accept a 1/2" gas line for installation of an approved gas appliance. 1" (MHSC manufactures a wide variety of gas logs for Supply Min. Gas Line use in MHSC fireplaces.) Line Tube Be sure to have the appliance installed in accordance Ceramic Repack Insula- with building codes. Knockout tion Gas connection may enter from either left or right side 1/2" of t
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CWC Series Woodburning Fireplace 1 6 2 5 7 8 10 11 9 4 12 2 3 13 16 17 18 15 14a,b MHSC reserves the right to make changes in design, materials, specifications, prices and discontinue colors and products at any time, without notice. 2-583 Parts page 3/2/99 djt CWC400/500 Woodburning Fireplace Item/Model Number CWC400 CWC500 1. Damper Blade 7551310 7551310 2. Grille Painted (two per fireplace) 20014533 20000714 3. Basket Grate 3041130 3041130 4. Screen (two per fireplace) 26D0131 26D0131
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CWC Series Woodburning Fireplace Accessories The following accessories for this appliance are available from your local distributor. Should you need additional information beyond what your distributor can furnish, contact: MHSC, 149 Cleveland Drive, Paris, KY 40361; Attn: Technical Services. CAUTION: This fireplace and chimney assembly is a highly engineered system, and, as such, must be operat- ed only with MHSC approved components. If you use an unapproved component to make any modificati
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CWC Series Woodburning Fireplace Chimney Components U.S. Component Description Model Number Round Top Termination Top used to terminate chimney at roof. RLTSK8 (SK8) (Flashing not included.) Round Top Termination - Top used to terminate chimney at chase. RLTSK8L Extended (SK8) (Flashing not included.) Flashing Metal finishing required around Contemporary 8-6-12 with 8" flue: Termination to prevent rain leakage. 0-6/12 pitch 8-12-12 with 8" flue: 6/12-12/
