Crestron electronic 2 Manual De Usuario

        

Installation & Operation Manual

 DANGER

The Crest must be vented and supplied 
with combustion and ventilation air as 
described in this section.  Ensure the vent 
and air piping and the combustion air 
supply comply with these instructions 
regarding vent system, air system, and 
combustion air quality.  See also Section 
1 of this manual.

Inspect finished vent and air piping 
thoroughly to ensure all are airtight and 
comply with the instructions provided 
and with all requirements of applicable 
codes.

Failure to provide a properly installed 
vent and air system will cause severe 
personal injury or death.

The air inlet pipe(s) must be sealed.  Choose acceptable 
combustion air inlet pipe materials from the following list:

 

ABS, PVC, or CPVC 

 

Dryer Vent or Sealed Flexible Duct (not recommended 

 

for rooftop air inlet)

 

Galvanized steel vent pipe with joints and seams sealed 

 

as specified in this section.

 

Type “B” double-wall vent with joints and seams sealed 

 

as specified in this section.

 

AL29-4C, stainless steel material to be sealed to 

 

specification of its manufacturer.

*Plastic pipe may require an adapter (not provided) to 
transition between the air inlet connection on the appliance 
and the plastic air inlet pipe.

 WARNING Using vent or air intake materials other 

than those specified, failure to properly 
seal all seams and joints or failure to follow 
vent pipe manufacturer’s instructions can 
result in personal injury, death or property 
damage.  Mixing of venting materials will 
void the warranty and certification of the 
appliance.

The use of double-wall vent or insulated 
material for the combustion air inlet 
pipe is recommended in cold climates 
to prevent the condensation of airborne 
moisture in the incoming combustion air.

Sealing of Type “B” double-wall vent material or galvanized 
vent pipe material used for air inlet piping on a sidewall or 
vertical rooftop Combustion Air Supply System:

a.  Seal all joints and seams of the air inlet pipe using either 
 

Aluminum Foil Duct Tape meeting UL Standard 723 or 

 

181A-P or a high quality UL Listed silicone sealant such 

 

as those manufactured by Dow Corning or General 

 Electric.

b.  Do not install seams of vent pipe on the bottom of 
 horizontal 

runs.

c.  Secure all joints with a minimum of three sheet metal 
 

screws or pop rivets.  Apply Aluminum Foil Duct Tape or 

 

silicone sealant to all screws or rivets installed in the vent 

 pipe.

d.  Ensure that the air inlet pipes are properly supported.

The PVC, CPVC, or ABS air inlet pipe should be cleaned and 
sealed with the pipe manufacturer’s recommended solvents 
and standard commercial pipe cement for the material used.  
The ABS, PVC, CPVC, Dryer Vent or Flex Duct air inlet pipe 
should use a silicone sealant to ensure a proper seal at the 
appliance connection and the air inlet cap connection.  Dryer 
vent or flex duct should use a screw type clamp to seal the 
vent to the appliance air inlet and the air inlet cap.  Proper 
sealing of the air inlet pipe ensures that combustion air will be 
free of contaminants and supplied in proper volume.