CleaverBrooks CFC-E 1000, Руководство пользователя

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BOILER BOOK CFC-E STACK/BREECHING SIZE CRITERIA
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Boiler Air Inlet
The boiler ships with both an air inlet screen and a direct vent collar (see illustration below). If room
air will be used for combustion, install the air inlet screen; the collar may be discarded. If direct
venting will be used, install the vent collar; the screen may be discarded.
Mounting hardware is provided with the boiler.
When using direct vent combustion:
1. Provide for adequate ventilation of the boiler room or mechanical equipment room.
2. In cold climates, and to mitigate potential freeze-up of the intake pipe, it is highly recommended
that a motorized sealed damper be used to prevent the circulation of cold air through the boiler
during non-operating hours.
Figure 31. Boiler Air Inlet
STACK/BREECHING SIZE CRITERIA
General
Boilers are divided into four categories based on the pressure and temperature produced in the
exhaust stack and the likelihood of condensate production in the vent.
• Category I. A boiler which operates with a non-positive vent static pressure and with a vent gas
temperature that avoids excessive condensate production in the vent.
• Category II. A boiler which operates with a non-positive vent static pressure and with a vent gas
temperature that may cause excessive condensate production in the vent.
• Category III. A boiler which operates with a positive vent pressure and with a vent gas temperature
that avoids excessive condensate production in the vent.
• Category IV. A boiler which operates with a positive vent pressure and with a vent gas temperature
that may cause excessive condensate production in the vent.
Depending on the application, the Model CFC-E may be considered Category II, III, or IV. The
specifying engineer should dictate flue venting as appropriate to the installation.
In some cases, PVC/CPVC material meeting ULC Type BH Class IIB specifications may be used.
Use of PVC/CPVC depends on operating conditions, specific vent suppliers, and any local codes
having jurisdiction. Refer to vent manufacturer’s specifications for applicability.
Proper installation of flue gas exhaust venting is critical to efficient and safe operation of the Clearfire
Boiler. The vent should be supported to maintain proper clearances from combustible materials. Use
insulated vent pipe spacers where the vent passes through combustible roofs and walls.