Hearth and Home Technologies Montana-42 Complete the Enclosure, Gas Log/Lighter Provisions

MONTANA INSTALLATION INSTRUCTIONS

12.Complete the Enclosure

Complete the fireplace enclosure, allowing space for outside air ducts and gas piping if desired. Electrical wiring should not come in contact with the fireplace. A minimum clearance of 1½” must be maintained between the fireplace sides and the enclosure as well as the fireplace back and the enclosure. See pages 8 and 9 for framing details.

Note: Use only a noncombustible material to finish the face of the fireplace below the level of the front standoffs. A noncombustible material such as USG MICORE CV230 Mineral Fiber Board, or USG DUROCK Cement Board is recommended for this purpose.

CAUTION:

When using a gas log set, the fireplace damper must be set in the fully open position. This en- sures proper venting of combustion products.

13.Gas Log/Lighter Provisions

Knockouts are provided on both sides of the fireplace to allow for connection of a certified gas log lighter or a decorative gas appliance certified or tested for outdoor use, with a maximum input of 100,000 BTU/hour, incorporating an automatic gas shut-off device and complying with the

Standard for Decorative Gas Appliances for Installation in Vented Fireplaces, ANSI Z21.60. The decorative gas appliance should be installed in accordance with the National Fuel Gas Code, ANSI Z223.1-1980. The side refractories are designed to allow ½” iron pipe to pass through. Use a noncombustible sealant to seal any opening between the gas pipe and refractory on the inside. Repack the insulation removed to seal around the gas pipe where it exits the side of the fireplace. A minimum 1½” air clearance must be provided around the ½” iron pipe for a minimum of 4 inches beyond the fireplace. See Figure 20.

WARNING!

This fireplace was not tested by the fireplace manufacturer for use with an unvented gas log heater. To reduce risk of injury, do not install an unvented gas log heater in this fireplace unless it has been specifically tested and listed by Underwriter’s Laboratories Inc. for use in this specific model fireplace. Unless the unvented gas log heater is tested and listed for use in this fac- tory built fireplace, a fire hazard may be created that can result in a structure fire.

Figure 20 - Air Clearance Around Gas Line

CLEARANCES!

A minimum 1½” air clearance must be maintained at the back and sides of the fireplace assembly ex- cept at the nailing flange where the clearance is ½”.

Chimney sections at any level require a 2” minimum air space clearance between the framing and chim- ney section.

01/04 4039-150 Rev B 17