Heart & Home Collectables MHR36 Complete the Enclosure, Gas Log/Lighter Provisions, Clearances

MHC36 AND MHR36 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 1 in. must be maintained between the fireplace sides and the enclosure (except at the nailing flange) as well as the fireplace back and the enclosure. See pages 9-11 for framing details.

Note: Use only a noncombustible material to fin- ish 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 with a maximum input of 100,000 BTU/hour, incorporating an automatic gas shutoff 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 1/2 in. 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 1-1/2 in. air clearance must be provided around the 1/2 in. iron pipe for a minimum of 4 in. beyond the fireplace. See Figure 18.

This fireplace has been set up for installation of the gas pipe on the right hand side. If it is necessary to plumb the fireplace from the left hand side, remove the gas cover plate and gas tube from the right hand side of the fireplace and install on the left hand side. Cover the hole in the right hand side outershell of the fireplace with the cover plate that covered the gas tube.

Figure 18 - Air Clearance Around Gas Line

CLEARANCES!

A minimum 1 in. air clearance must be maintained at the back and sides of the fireplace assembly ex- cept at the nailing flange where the clearance is 1/2 in.

Chimney sections at any level require a 2 in. mini- mum air space clearance between the framing and chimney section.

WARNING!

This fireplace was not tested by the fireplace manu- facturer 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 spe- cifically tested and listed by Underwriter’s Labora- tories Inc. for use in this specific model fireplace. Unless the unvented gas log heater is tested and listed for use in this factory built fireplace, a fire hazard may be created that can result in a structure fire.

08/04 31072 Rev G 19