Series-LA/LX/LXR
Page 21
6/15/2010
Venting / Combustion Air Ducting
Vented Operation
In all cases, be sure vent pipes and outside air supply ducts are sealed with approved sealant, such as
high temperature RTV silicone. Double wall venting (B vent) may not require sealant.
Horizontal Venting
•
When venting through combustible walls, use approved vent terminal Tjernlund VH1-4, or SRP
supplied deflector terminal with an approved insulating thimble.
•
When venting through non-combustible walls, use SRP supplied deflector vent terminal.
Recommended extension of the terminal past the outside wall surface is 18" inches minimum.
Vertical Venting
•
Minimum vent pipe size is 4" inch for an individual heater. Additional vent pipe sizes as required
to accommodate multiple heaters venting through a common roof vent are defined in the
appropriate gas installation code. (Refer to common venting section below).
•
Use of an approved thimble to pass through combustible roof materials is required.
•
Use of an approved vent cap is required.
•
Check local codes for vertical vent size for fan-assisted appliances.
Figure 25
INCREASE TO DETERMINED
"B" VENT SIZE
4" VENT
TERMINAL
P/N CT011
MAX. 30'
WITH 2 ELBOWS
NON-COMBUSTIBLE WALL
18" MIN.
FOR VERTICAL VENTING REFER TO
ANSI Z223.1 AND CAN/CGA B149.1
AND B149.2 FOR FAN ASSISTED
APPLIANCES.
ROOF
4" WALL THIMBLE
P/N CS006
COMBUSTIBLE WALL
MAX. 30'
WITH 2 ELBOWS
4" VENT TERMINAL
P/N CT011
18" MIN.
FLASHING
NOTES: (FOR HORIZONTAL VENTING)
1- USE 4" SINGLE WALL VENT FOR HORIZONTAL VENTING
2 - WALL THIMBLES AND VENT TERMINALS
MUST TO BE USED WITH SINGLE WALL HORIZONTAL VENTING THROUGH COMBUSTIBLE WALLS.
WALL THIMBLE MAY BE REPLACED BY FLASHING WHERE THE VENT IS PENETRATING
A NON-COMBUSTIBLE WALL.
Содержание LA series
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