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SECTION 2 FTCS-IOM-2013-1114 INSTALLATION
2-33
rated for a 1200°F (649°C) operating temperature.
6. Ensure the stack and chimney material complies with all
applicable codes.
7. Make adequate provisions for the support of the
weight of the chimney and stack to avoid having a load
imparted to the outlet connection of the equipment.
8. Ensure the draft, when  ring, is negative and constant.
A reading of -0.02 to -0.04”wc when the unit and stack
are cold usually indicates su cient draft. When the unit
is running and the stack is hot, the draft should read 0.04
to 0.08 “wc negative.
9. The installation of a draft regulator by the client/
contractor should be considered at all installations,
and installed if necessary. This will help to maintain the
required draft. The placement of the draft regulator
should be as shown in Figure 19.
10. Insulate the section of the chimney duct within
Roof
Minimum
6' Above
Any Structure
Within 30'
Support As
Necessary
Install
Appropriate
Weather
Cap
Horizontal
Run 2'
Draft Regulator Draft Regulator
Expansion Joints
As Required
Horizontal
Run 2'
60°
(45° Min.)
Cleanout
Door
Cleanout
Door
Cleanout
Door
This Distance
Must Not
Exceed 70%
Of Total Rise
Baffle
3'
3'
30°
Max
Stagger
Entrances
AA
A-A
Total
Rise
FIGURE 18  TYPICAL STACK AND FLUE INSTALLATION