Assessments - 3, GPA: 4
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See Section 3.B. WARNING Fire Risk! • Prevent contact with sagging, loose insulation. • Do NOT install against vapor barriers or exposed insulation. • Place the Protective Metal Hearth Strips WARNING Fire Risk! • Metal hearth strips MUST be installed. Sparks or embers may ignite flooring. Included with your fireplace you will find two metal hearth strips measuring approximately 26 in. x 4 in. (660 mm x 102 mm). These strips are used to provide added protection where the fireplace and the hearth extension meet. Slide each metal strip 2 in. (51 mm) under the front edge of the fireplace. The individual pieces must overlap each other by 1 in. (25 mm) minimum in the middle of the fireplace to provide continuous coverage of the floor. See Figure 4.4. These metal strips should extend from the front and sides of the fireplace opening by 2 in. (51 mm). Raised Platform Floor 2 in. (51 mm) 1 in. (25 mm) min. overlap 2 in. (51 mm) Top piece must overlap bottom piece Figure 4.5 Protect the Front of an Elevated Platform Protective metal strips are placed 2 in. (51 mm) under the front of the fireplace and must extend beyond the front and sides of fireplace opening by 2 in. (51 mm). 1 in. (25 mm) overlap Figure 4.4 Position the Protective Metal Hearth Strips Note: When elevating the fireplace above the hearth extension the front of the elevated platform must be protected with a protective metal hearth strip as shown in Figure 4.6. • Level the Fireplace Level the fireplace side-to-side and front-to-back. Shim with noncombustible material, such as sheet metal, as necessary. Secure the fireplace (using the nailing flanges located on either side of the fireplace) to the vertical framing. Important: To ensure proper fit of the glass doors, check the fireplace opening for square. Measure diagonal distances of the opening to make sure they are equal. If they are not, continue to shim the fireplace until those diagonals are equal. Outdoor Lifestyles by Hearth & Home Technologies Inc. • Montana US-CAN • 4039-156 Rev M • 2/12 5 Chimney Assembly A. Chimney Requirements Vertical distances are measured from the base of the fireplace. • Minimum overall straight height is 6 ft 4 in. if the fireplace is freestanding and a minimum of 10 ft from a combustible structure. See Figure 3.2. • Chimney must extend 2 ft (.6 m) above any portion of the roof within 10 ft (3 m) of the chimney. Refer to Figure 6.1. ft m • Minimum height width offset/return 16 4.88 • Maximum height 90 27.43 • Maximum chimney length between an offset and return 20 6.1 • Maximum distance between chimney stabilizers 35 10.67 • Double offset/return minimum height 24 7.32 • Maximum unsupported chimney length between the offset and return 6 1.83 • Maximum unsupported chimney height above the fireplace 35 10.67 • Minimum overall straight height if fireplace is freestanding 10 3.048 Note: A maximum of two pairs of offsets and returns may be used. WARNING Fire Risk • Must maintain 2 in. (51 mm) air clearance to insulation and other combustible materials. To determine the chimney components needed to complete your particular installation, follow the steps below: • Determine the total vertical height of the fireplace installation. This dimension is measured from the base of the fireplace assembly to the point where the smoke exits the termination cap. • Subtract the effective height of the fireplace assembly from the overall height of the fireplace installation (measured from the base of the fireplace to the bottom of the termination cap). • Refer to Table 5.1 to determine what components must be selected to complete the fireplace installation. • Determine the number of ceiling firestops, stabilizers, roof flashing, etc. required to complete the fireplace installation. CAUTION • • Do NOT connect this fireplace to a chimney flue servicing another appliance. Do NOT connect to any air distribution duct or system. Table 5.1 HEIGHT OF CHIMNEY COMPONENTS in. mm US Canada ONLY Chimney Stabilizer SL11 SL4 4-3/4 121 Ceiling Firestops FS538 FS538 0 0 FS540 FS540 0 0 Offsets/Returns SL1130 SL430 14-1/2 368 Chimney Sections* SL1106 SL406 4-3/4 121 SL1112 SL412 10-3/4 273 SL1118 SL418 16-3/4 425 SL1136 SL436 34-3/4 883 SL1148 SL448 46-3/4 1187 n/a SLA10 16-3/4 425 * Dimensions reflect effective height. Outdoor Lifestyles by Hearth & Home Technologies Inc. • Montana US-CAN • 4039-156 Rev M • 2/12 B. Using Offsets/Returns To bypass any overhead obstructions, the chimney may be offset using an offset/return. An offset and return may be attached together or a chimney section(s) may be used between an offset and return. Perform the following steps to determine the correct chimney component combination for your particular installation: WARNING Fire Risk • Draft will be restricted if offsets/returns greater than 30° are used. Table 5.2 A B SL1106 SL406 SL1112 SL412 SL1118 SL418 SL1136 SL436 SL1148 SL448in. mm in. mm 4 7/8 124 17 7/8 454 ----- 7 1/4 184 2 2 559 1 ---- 9 3/4 248 26 1/8 664 2 ---- 10 1/...