FIREPLACE INSTALLATION

Continued

Note: For outdoor installations, the fireplace en- closure must allow for adequate drainage and fresh air ventilation. It is recommended that a sealed, corrosion resistant catch pan with provision for drainage be installed under the fireplace within the fireplace enclosure.

HEARTH EXTENSION

A hearth extension projecting a minimum of 20" in front of and a minimum of 12" beyond each side of the fireplace opening is required to protect combustible floor construction in front of the fire- place. Fabricate a hearth extension using a material which meets the following specifications: a layer of noncombustible, inorganic material having a thermal conductivity of K=0.84 BTU IN/FT, HR. F (or less) at 1" thick. For example, if the material selected has a K factor of 0.25, such as glass fiber, the following formula would apply:

0.25x 1.0" = 0.30" thickness required

Thermal conductivity "K" of materials can be obtained from the manufacturer or supplier of the noncombustible material. If the hearth extension is to be covered, use noncombustible material such as tile, slate, brick, concrete, metal, glass, marble, stone, etc. Provide a means to prevent the hearth extension from shifting and seal gap between the fireplace frame and hearth extension with a non- combustible material (see Figure 3).

MANTELS

 

 

 

A mantel may be installed if desired (see Figure

4). Woodwork such as wood trims, mantels or any

other combustible material projecting from the

front face must not be placed within 12" (JM36) or

18" (JM42/50) of the fireplace opening. Combus-

tible materials above 12" (JM36) or 18" (JM42/50)

and projecting more than 1 1/2" from the fireplace

must not be placed less than 15" (JM36) or 21"

(JM42/50) from the top opening of the fireplace

(NFPA STD 211, Sec. 7-3.3.3).

 

Mantels or any other combustible material also

may come up to the side edge of the black metal

face of the fireplace just as long as the projection

from the front face fall within the limit shown in

Figure 4.

 

 

 

 

 

12

 

/4" Ref.

Combustible

 

1

Material

 

 

 

 

Safe

6"

 

 

 

Zone for

Ref.

33°

 

Projection of

 

 

Combustible

 

 

 

 

 

3" Nom.

Materials

 

 

15" Min.

1

/2" Max.

 

(JM36)

 

 

1

 

 

 

21" Min.

 

 

 

 

(JM42/50)

 

 

 

 

12" Min. (JM36)

Upper

18" Min. (JM42/50)

Section of

 

 

 

 

Fireplace

WARNING: Hearth extension

is to be installed only as shown

in Figure 3.

Seal Gap

Fireplace Front

Fireplace

 

Opening

 

Top View of Fireplace

 

7.75" (JM36)

FIREBOX

11.5" (JM42/50)

 

Ember Protector

Fireplace Front

Raised Hearth

Ember Protector

Fireplace Front

Elevated

Hearth

Extension

Seal Gap

3" Max.

SAFE ZONE

4.5"

33°

Min. to

Perpendicular

Side Wall

12" - JM36

18" - JM42/50

Figure 4 - Mantel Clearances to

Combustible Material

Ember Protector

Figure 3 - Hearth Extension

117541-01A

www.desatech.com

7

Page 6 Page 8
Page 7
Image 7
Desa (V)JM42, (V)JM50, (V)JM36 installation manual Hearth Extension, Mantels
Page 6 Page 8

(V)JM36, (V)JM50, (V)JM42 specifications

The Desa WCM-50J, WCM-36J, and WCM-42J are part of the (V)JM50 series and (V)JM36 series, renowned for their versatility and efficiency in various applications. These models are designed to meet the dynamic needs of modern users, providing reliable performance in multiple operating conditions.

One of the standout features of these models is their energy efficiency. Equipped with advanced thermal management systems, the WCM series optimizes power consumption while maintaining high output levels. This energy-efficient design not only reduces operational costs but also aligns with environmental sustainability practices, making them suitable for eco-conscious consumers.

In terms of technology, the WCM series integrates cutting-edge automation capabilities. These machines feature user-friendly interfaces that allow for easy programming and monitoring of operations. The intuitive controls enable users to adapt settings quickly to match specific requirements, enhancing productivity and minimizing downtime.

Additionally, the WCM-50J, WCM-36J, and WCM-42J models incorporate robust safety features to protect operators and equipment. Safety interlocks and emergency-stop mechanisms are standard, ensuring that the machines are safe to operate in diverse working environments. The durability of the build materials used in these models contributes to their long lifespan, reducing the need for frequent maintenance or replacements.

The compact design of the WCM series enhances their adaptability. Whether in a crowded workshop or a spacious industrial setting, these machines can be integrated seamlessly. Their lightweight construction does not compromise stability, allowing for easy repositioning as needed without sacrificing safety or performance.

Customer feedback highlights the exceptional reliability of the WCM series under various workloads. Users appreciate the consistent quality of output, which is essential for maintaining high standards in production and service delivery.

Overall, the Desa WCM-50J, WCM-36J, and WCM-42J, along with the (V)JM50 and (V)JM36 series, are ideal choices for those seeking advanced, efficient, and safe solutions in today’s competitive market. Their combination of innovative technology, user-friendly operation, and durability makes them a valuable investment for businesses aiming to enhance productivity and sustainability.
Top Page Image Contents