5
VENT PIPE AND DRAFT HOOD SIZES
Refer to Chart 3 to properly size the flue pipe. If the flue pipe exceeds 10’ in length (including elbows), use the next larger diameter flue pipe and draft hood. If a draft regulator is required, any Canadian Standards Association (CSA) or Underwriter’s Laboratory (UL) listed double swing draft regulator must be used. A movable internal damper is not permitted on gas installations. When the burner is used as a conversion burner, draft over fire should be maintained as
The sizing below does not apply on any factory listed packaged units.
Chart 3: Vent Pipe Sizing
Input per Hour | Draft Hood and Flue Pipe Sizes |
Up to 120,000 BTU | 5” diameter |
120,000 to 160,000 BTU | 6” diameter |
160,000 to 250,000 BTU | 7” diameter |
INSTALLING THE BURNER
If the burner being installed is a conversion burner, use a prefabricated chamber or build a firing chamber that can withstand 2000o F (See Chart 2 on page 3). Measure the boiler or furnace mounting plate to determine the flame tube insertion required. Deduct ¼” from the total length and tighten the flange on the flame tube with the deducted insertion depth. The ¼” deduction will prevent the tip of the flame tube from burning off. Install the burner on the unit and then tighten the nuts on the flange so that the burner is permanently secured. Seal off any free openings with high temperature cement.
Refer to the pictures below to determine which flange is installed on the
Picture 1: STANDARD FLANGE:
Install the gasket and the Standard flange to the boiler. Tighten the bolts. Measure the boiler or furnace- mounting plate to determine the flame tube insertion depth required and make a mark on the tube (with a marker or screwdriver). Deduct ¼” from the total length and tighten the flange on the flame tube with the deducted insertion depth. The ¼” deduction will prevent the tip of the flame tube from burning off. Slide the blast tube into the boiler to the proper depth and tighten the four