THIMBLES

Thimbles for chimneys or vent connectors should be of fire clay (ASTM C 315, specifications for Clay Flue Linings), galvanised steel of minimum thick- ness of 24 gauge, or material of equivalent durabili- ty. Thimbles should be installed without damage at the liner. The thimble should extend through the wall to, but not beyond, the inner face of the liner and should be firmly cemented to masonry.

Thimbles should be located to provide adequate pitch or rise of chimney or vent connectors and, where the ceiling above the appliance is constructed of combustible material, the location of the thimble should provide minimum clearance required for the connector as specified in section under Minimum Clearances.

Insulation material used as part of wall pass-through system should be of non-combustible material and should have a thermal conductivity of 1.0 Btu. in./ft.F (4.88 kg.cal/hr.m.c) or less. All clearances and thick- nesses are minimums; larger clearances and thick- nesses are acceptable. Any material used to close up the opening for the connector should be of non- combustible material. A connector to a masonry chimney, except for System 2 (under heading Chimney Connector System, Thimbles and Clearances), shall extend to piece through the wall pass-through system and the chimney wall to the inner face of the flue liner, but not beyond.

CHIMNEY CONNECTOR SYSTEMS, THIMBLES, AND CLEARANCES FROM COMBUSTIBLE WALLS

1.Minimum 3 1/2” (90mm) thick brick masonry wall framed into combustible wall with a min. of 12” (305mm) brick separation from clay liner to combustibles. Fire clay liner (ASTM C315 or equivalent) min. 5/8” (16mm) wall thickness, should run from outer surface of brick wall to, but not beyond, the inner sur- face of chimney flue liner and should be firmly cemented in place.

Minimum chimney clearance to brick and combustibles 2” (50mm)

Minimum clearance 12” (300mm) of brick

Fire Clay Liner

Chimney connector

Minimum 12” (300mm) to combustibles

Masonry

Chimney

FIGURE A constructed to

NFPA 211

2.Solid insulated listed factory-built chimney length of the same inside diameter as the chimney connector and having 1” (25mm) or more of insulation with a min. 9” (230mm) air space between the outer wall of the chimney length and combustibles. The inner end of the chimney length shall be flush with the inside of the masonry chimney flue and shall be sealed to the flue and to the brick mason- ry penetration with non water-soluble refrac- tory cement. Supports should be securely fastened to wall supports and the chimney

length shall not penetrate the chimney liner.

Minimum chimney clearance from masonry to sheet steel supports and combustibles 2” (50mm)

(230mm)

 

 

 

 

Non-soluable

 

 

 

 

refractory

 

 

cement

 

 

 

 

 

 

 

 

 

Chimney

 

 

 

 

length flush

 

 

 

with inside

 

 

 

of flue

 

 

 

 

 

Masonry chimney constructed to NFPA 211

Factory built chimney length

Air space 9” (230mm) minimum

FIGURE B

3.Sheet steel chimney connector, min. 24 gauge in thickness, with a ventilated thimble, min. 24 gauge in thickness, having two 1” (25mm) air channels, separated from com- bustibles by a min. of 6” (150mm) of glass fibre insulation. Opening should be covered and thimble supported with a sheet steel support, min. 24 gauge in thickness. Supports should be securely fastened to wall surfaces on all sides and should be sized to fit and hold chimney section. Fasteners used to secure chimney sections should not penetrate chimney flue liner.

Minimum chimney clearance to sheet steel supports and combustibles 2” (50mm)

Two air channels each 1” (25mm)

Chimney connector

Minimum 6” (150mm) glass fibre insulation

Sheet steel

Two ventilated air

supports

channels each 1”

 

 

(25mm) constructed

 

of sheet steel

FIGURE C

4.Solid insulated listed factory-built chimney length with an inside diameter 2” (50mm) larger than the chimney connector and hav- ing 1” (25mm) or more of insulation, serving as a pass-through for a single wall sheet steel chimney connector of min. 24 gauge thickness, with a min. 2” (50mm) air space

8

Page 7 Page 9
Page 8
Image 8
Waterford Appliances LEPRECHAUN 90 O.S.A operating instructions Thimbles, Length shall not penetrate the chimney liner
Page 7 Page 9

LEPRECHAUN 90 O.S.A specifications

The Waterford Appliances LEPRECHAUN 90 O.S.A is a remarkable addition to the world of cooking appliances, renowned for its blend of traditional craftsmanship and modern technology. This professional-grade range cooker is designed for home chefs who seek both performance and aesthetics in their kitchen. At the heart of the LEPRECHAUN 90 O.S.A is a commitment to delivering exceptional cooking results, supported by a suite of impressive features and innovations.

One of the standout aspects of the LEPRECHAUN 90 is its powerful dual-fuel cooking system, which combines the precision of gas burners with the consistency of an electric oven. This dual-fuel configuration allows chefs to achieve precise temperature control and versatile cooking options. With five gas burners of varying sizes, including a high-output burner for rapid boiling and a gentle simmer burner for delicate sauces, the range is equipped to handle any culinary challenge.

The oven section of the LEPRECHAUN 90 O.S.A features a spacious main cavity that can accommodate large dishes, making it perfect for family gatherings or entertaining guests. It boasts multiple cooking functions, including conventional, fan-assisted, and grilling options, ensuring uniform heating and optimal cooking results. Additionally, the oven is equipped with advanced insulation technology, which promotes efficiency and helps maintain steady cooking temperatures while reducing energy consumption.

An integrated multifunctional grill adds to the versatility of this appliance, allowing users to prepare a wide variety of dishes from succulent grilled meats to deliciously crisp vegetables. The grill’s adjustable heat settings provide both searing and gentle cooking, catering to a broad spectrum of recipes.

Another notable feature is the integrated timer and digital display, which make it easy to monitor cooking times and temperatures. This modern touch complements the classic design of the LEPRECHAUN 90 O.S.A, featuring elegant, sturdy construction available in a variety of finishes to match any kitchen decor.

Safety is paramount, and Waterford Appliances has incorporated child safety locks on the oven doors and burners. The appliance also features a flame failure device that automatically cuts off the gas supply in the event of a flame extinguish, ensuring peace of mind while cooking.

In conclusion, the Waterford Appliances LEPRECHAUN 90 O.S.A beautifully combines style, functionality, and technology, making it an essential appliance for any serious home cook. With its array of features, it is designed to elevate the cooking experience, turning everyday meals into extraordinary culinary creations.
Top Page Image Contents