CLEAN BURN CB-200-CTB, Operator'S Manual, Page: 59 / 148

Coil Tube Boiler Operator's Manual: Models CB-200-CTB, CB-350-CTB, and CB-500-CTB
4-21
Installing the Stack (continued)
Figure 4J - Detail of Dual-Stacked Boiler Stack Installation
3. Install an elbow or clean-out tee (with a smoke cap installed in the bottom) onto the extension
piece from the boiler smoke hood breach.
4. Install a smoke pipe tee onto this elbow or clean-out tee (for the installation of the barometric
damper).
ATTENTION: Avoid additional 90-degree turns in the stack. Each additional 90-degree turn
slows down stack gases, creates back-pressure, and results in repeated burner shutdown and
unnecessary service calls. All other turns in the stack should be at a 45-degree (or smaller) angle.
Installing the Barometric Damper(s)
1. Refer to Figure 4K. Install a single wall tee (min. 24 gauge) on the first straight vertical or
horizontal stack section within three feet of the CTB breach.
NOTE: This tee is required to support the barometric damper. You must purchase this tee when
you purchase your stack materials (8" single wall tee - CB# 70174; 10" single wall tee - CB# 70180).
ATTENTION: For Dual-Stacked CTB Units Only - You are required by code to install two
dampers (provided) - one for each boiler. DO NOT attempt to substitute other types of
dampers--they will not allow the unit to function properly and may void your warranty.
8"
8"
DAMPER
32 1/4" BETWEEN
CENTERS (CB−200−CTB)
10" BETWEEN
OPENING CENTERS
I88672-A
37 1/8" BETWEEN
CENTERS (CB−350−CTB)