CLEAN BURN CB-200-CTB, Руководство оператора, Страница: 57 / 148

Coil Tube Boiler Operator's Manual: Models CB-200-CTB, CB-350-CTB, and CB-500-CTB
4-19
Installing the Stack
WARNING: Inappropriate stack materials or improper stack design/installation can adversely
affect the proper, safe operation of your coil tube boiler.
Stack designs are generally classified as follows:
(1) "Class A" stack through the ceiling of the building
(2) "Class A" stack through the sidewall and up the side of the building
Figure 4I illustrates the through-the-ceiling stack design for a single boiler; this stack design is
preferable and is more commonly used. Refer to Figure 4J for the dual-stacked boiler stack design.
When designing your stack, adhere to the following specifications:
• Models CB-200-CTB and CB-350-CTB single boilers require 8" I.D. stack components.
• Model CB-500-CTB single boilers require 10" I.D. stack components.
• Models CB-200-CTB and CB-350-CTB dual-stacked units require 8" I.D. stack components run
as two (2) individual stacks.
• Model CB-500-CTB dual-stacked units require 10" I.D. stack components run as two (2)
individual stacks.
• Ensure that the vertical stack height is at least 10 feet. If needed, increase the vertical length
of the stack or install a draft inducer to obtain -.02" W.C. draft over fire. (Section 8 contains
details on adjusting the draft.)
• Keep the horizontal stack run as short as possible ; slant it upward at a minimum of 1/4" per
foot of run.
• Keep the stack design simple. Complicated stacks (with long runs and many turns) reduce
draft and result in poor burner performance. Your stack may include only one 90 degree
turn. All other stack turns must be at 45 degrees or less to ensure optimal draft and burner
performance.
NOTE: If you plan to use an existing masonry chimney, the chimney must be lined and be located
inside the building. Exterior masonry chimneys chill the stack gases and result in poor draft and poor
burner performance.
ATTENTION: If you have an exhaust fan(s) in your shop, it is critical that you have adequate
make up air (source of fresh air to replace the stale air exhausted by the fan). When an exhaust fan is
run without adequate make up air, the resultant vacuum in the building will draw combustion products
back into the burner. This back draft causes poor burner performance and may damage vital burner
components. Refer to Section 8 in this manual for additional information concerning exhaust fans and
proper make up air.
Stack components should be installed in the following order:
(1) Inside stack (the stack components from the coil tube boiler breach to within 18" of the
ceiling, roof, or sidewall of your building)
(2) Barometric damper(s)
(3) "Class A" stack penetration through the ceiling, roof, or sidewall
(4) "Class A" stack on the exterior of the building
(5) "Class A" stack cap