CLEAN BURN CB 140, Руководство оператора

Страница: 58 / 142

Operator's Manual: Models CB-1750, CB-2500 & CB-3250
4-18
Installing the Stack
WARNING: Inappropriate stack materials or improper stack design/installation can adversely
affect the proper, safe operation of your furnace. Contact your Clean Burn dealer to purchase the
proper stack components for your furnace.
Stack designs are generally classified as follows:
(1) "Class A" stack through the ceiling of the building (refer to Figure 4L )
(2) "Class A" stack through the sidewall and up the side of the building (refer to Figure 4M )
Stack Design and Specifications
ATTENTION: The stack design must be single and dedicated for each unit (furnace) according to
the following specifications. A single stack serving more than one unit MUST be engineered/certified
for that specific installation (ref. NFPA 211, 3.3.39 and 10.2.1; NFPA 31 6.5.16-18). Failure to adhere to
this rule may result in less than optimal system performance.
Figures 4L and 4M illustrate recommended stack designs. Choose the stack design which is appropriate
for your furnace installation and review all specifications provided in the corresponding drawing. When
designing your stack, adhere to the following specifications:
• Models CB-1750, CB-2500 and CB-3250 require minimum 8" I.D. stack components .
•
Ensure that the vertical stack height is at least 10 feet PLUS one foot for every fitting (e.g.
45 degree, 90 degree, or T) in the stack run. 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
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.
Stack components should be installed in the following order:
(1) Inside stack (the stack components from the furnace breach to within 18" of the ceiling, roof,
or sidewall of your building)
(2) Barometric damper
(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