CleaverBrooks CFC ClearFire User Manual

Model CFC ClearFire Commercial Boilers
60 Rev. 05-2012
3. Combustion air supplied from the outside must be free of particulate and
chemical contaminants. To avoid a blocked flue condition, keep all the vent caps
clear of snow, ice, leaves, debris, etc.
Note: Multiple direct stack vent caps must not be installed with one combustion air inlet directly above
a stack vent cap. This vertical spacing would allow the flue products from the stack vent to be
pulled into the combustion air intake installed above. This type of installation can cause non-
warrantable problems with components and poor operation of the unit due to the recirculation of
flue products.
Table B5-25. STACK DESIGN (SINGLE BOILER) USING ROOM AIR
ROOM COMBUSTION AIR -- MAXIMUM ALLOWABLE VENTING LENGTH
Boiler
Boiler Stack/Flue
Connection
Boiler
Flue/Stack
Size
Maximum length of
Flue Gas Vent in
Feet*
Flue Connection
Part No.
Room
Combustion Air
Re
quired (CFM)
Air Filter Kit No.
(optional)
CFC 500 6" Standard 6" 80 039-01704
125 880-01858
CFC 750 6" Standard 6" 60 039-01704
190 880-01858
CFC1000 6" Option 6" 80 039-01646 250 880-01858
CFC1000 8" Standard 8" 140 039-01647
250 880-01858
CFC1000 10" Option 10" 200 039-01705 250 880-01858
CFC1500 8" Option 8" 60 039-01645 375 880-02005
CFC1500 10" Standard 10" 80 039-01644
375 880-02005
CFC1500 12" Option 12" 120 039-01688 375 880-02005
CFC1800 10" Option 10" 60 039-01644 450 880-02005
CFC1800 12" Standard 12" 100 039-01688
450 880-02005
CFC 2500 12" Standard 12" 110 039-01688
625 880-02005
CFC3300 12" Standard 12" 60 039-01761
800 880-02502
CFC3300 14" Option 14" 110 039-01762 800 880-02502
* Each additional 90 elbow equals 5 equivalent feet of ductwork. Flue terminations may add 5-10 feet
to the equivalent length and should also be included in the equivalent length calculation.
** Increasing the diameter of the air intake will reduce the overall pressure drop and thereby allow
longer total vent lengths.
Draft tolerance at boiler flue connection during operation is +/- 0.25” WC.

CleaverBrooks CFC ClearFire Specifications

General

Brand	CleaverBrooks
Model	CFC ClearFire
Category	Boiler
Language	English