Desa EVGL850N installation manual Venting Installation, Typical B-Vent Configuration

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® EVGL850N

VENTED TYPE DECORATIVE APPLIANCE

VENTING INSTALLATION

A B-type venting system must be connected to the appliance for venting to the outside of the building.

The following section is provided as a guide to a standard B-type vent installation.

Standing codes requirements concerning B- type vent installations may vary within your state, province or local codes jurisdiction. Therefore, it is recommended that you check with your local building codes for specific requirements or in absence of local codes, follow Section 7.0 of the current National Fuel Gas Code NFPA No. 54/ANS Z223.1 and in Canada with CAN/CGA B149 for Category I systems using double wall B-1 vent pipe.

This gas appliance must be vertically vented to the outdoors only and may not be termi- nated into an attic space or into a chimney flue servicing a solid-fuel burning appliance.

This appliance may be vented through a manufactured chimney system or a masonry chimney using a B-vent adapter or a chim- ney liner system if all are listed, inspected and approved by local codes and/or building authorities.

The examples shown in Figure 9 are typical of most B-vent installations and codes prac- tices.

Example 1: Shows the minimum allowable system height and lateral offset for a 60° degree or greater inclination. Code specifies that offsets at 60° degrees or greater are considered horizontal and must follow the 75% percent rule for lateral to total vertical system height. Codes also allows only one offset in the total system when at 60° de- grees or greater. The total vertical height in this example represents the minimum height of 8 feet and therefore the allowable lateral is 6 feet when the 75% percent rule applies. If the lateral length must exceed 75% then the system must be sized in accordance with the Category I venting tables.

Example 2: Shows a multiple offset each at 45° degrees of inclination. Multiple off- sets are permitted if they do not exceed 60° degrees of inclination. The total lengths of the two offsets are not required to meet the 75% percent allowable rule.

Example 3: Shows a single offset at 45° degrees of inclination and therefore the lateral length at 10 feet of offset does not have to meet the 75% percent rule.

In each case the offsets must be supported and firestops must be positioned wherever the vent must pass through a sub-floor, ceiling joist or an attic overhang. The vent pipe must terminate vertically into a listed type vent cap and extend a sufficient height through an approved roof flashing, roof jack or a roof thimble. At all points the listed clearances must be maintained.

 

 

Listed

 

 

 

 

 

 

 

Vent Cap

 

 

Listed

Listed

 

 

 

 

 

Vent Cap

 

 

 

 

 

Vent Cap

 

 

 

 

 

 

 

Maintain

 

Maintain

 

 

 

 

 

 

Listed

 

 

 

Maintain

 

Listed

 

 

 

 

 

 

Clearance

 

Maintain

 

Listed

 

Clearance

 

 

 

 

 

Support Each

 

Listed

 

Clearance

 

 

 

 

 

 

 

 

Lateral At

 

Clearance

 

 

 

 

 

Least Every

45°

 

 

 

 

 

60°

Six (6) Feet

12' Min.

 

 

 

 

 

 

 

 

 

8'

 

 

 

45°

10'

 

6'

 

 

 

12' Min.

Position

 

45°

Position

 

12' Min.

 

Position

 

 

Firestop

 

Firestop

 

Firestop

 

 

 

 

 

 

 

 

 

 

Maintain

 

Maintain

 

 

Maintain

 

 

Listed

 

Listed

 

 

Listed

 

 

Clearance

 

Clearance

 

 

Clearance

EXAMPLE 1

EXAMPLE 2

EXAMPLE 3

Figure 9 - Typical B-Vent Configuration

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Contents For Your Safety EVGL850N Natural Electronic IgnitionWhat to do if YOU Smell GAS Vented Type Decorative Appliance Introduction Before YOU BeginPRE-INSTALLATION Preparation Selecting LocationClearances Mantel Clearances and Wall Details FramingVenting Installation Typical B-Vent ConfigurationChecking for Proper Venting Min Roof PitchInstallation Wall Switch Installation EVGL850NGAS Line HOOK-UP OvertightenLOG & Ember Placement GAS Burner Supply HOOK-UPGlass Door Removal and Replacement Combustion AIR KIT Model Akgl OptionalAppliance Enclosure Lighting Instructions For Your Safety Read Before LightingOperating Fireplace To Turn OFF GAS To AppliancePilot Assembly Adjustment Burner Flame AdjustmentOperating Guidelines and Maintenance Instructions Service Hints Technical ServiceWiring Diagram Troubleshooting Observed Problem Possible Cause RemedyGas leak. See Warning statement at Receiver and HAND-HELD Remote Control KIT 00710 WRC Accessories Replacement PartsParts Under Warranty Parts not Under WarrantyReplacement Parts Pilot AssemblyGAS Control Valve 107050 Warranty Information