Crestron electronic 2 Manual De Usuario

        

Installation & Operation Manual

1. Air 

pipe 

penetration:

a.  Cut a hole for the air pipe.  Size the air pipe hole as 
 

close as desired to the air pipe outside diameter.

2.  Vent pipe penetration:
 

a.  Cut a hole for the vent pipe.  For either combustible 

 

 

or noncombustible construction, size the vent pipe 

 

 

hole per the vent manufacturer’s instructions.

 

b.  Insert a galvanized metal thimble in the vent pipe 

 

 

hole (when required by local codes).

3.  Space the air and vent holes to provide the minimum 

spacing shown in FIG. 3-1.

4.  Follow all local codes for isolation of vent pipe when 

passing through floors, ceilings, and roofs.

5.  Provide flashing and sealing boots sized for the vent pipe 

and air pipe.

1.  Prepare the vent termination coupling and the air 

termination elbow (FIG. 3-1) by inserting bird screens.  
Bird screens should be obtained locally.  

2.  The air piping must terminate in a down-turned 180° 

return bend as shown in FIG. 3-1.  Locate the air inlet 
pipe no further than 2 feet (.6 m) from the center of the 
vent pipe.  This placement avoids recirculation of flue 
products into the combustion air stream.

5.  Locate terminations so they are not likely to be damaged 

by foreign objects, such as stones or balls, or subject to 
buildup of leaves or sediment.

 WARNING

12" [305 MM] MINIMUM
ABOVE ROOF /
SNOW LINE

VENT OUTLET
36" [914 MM] MINIMUM
ABOVE AIR INLET

BIRD SCREEN
[TYPICAL]

Follow instructions below when determining 
vent location to avoid possibility of severe 
personal injury, death or substantial property 
damage.

Installation must comply with local 
requirements and with the National Fuel 
Gas Code, NFPA 54 / ANSI Z223.1 - latest 
edition for U.S. installations or CSA B149.1  
Installation Code for Canadian installations.

 WARNING

 WARNING

Do not connect any other appliance to the 
vent pipe or multiple boilers to a common 
vent pipe except as noted in Section 2 on 
page 18.  Failure to comply could result in 
severe personal injury, death, or substantial 
property damage.

Locate the vent/air terminations using the following guidelines:

1.  The total length of piping for vent or air must not exceed 

the limits given in the General Venting Section on page 17 
of this manual.

2.  The vent must terminate at least 3 feet above the highest 

place in which the vent penetrates the roof and at least 2 feet 
above any part of a building within 10 horizontal feet.

3.  The air piping must terminate in a down-turned 180° 

return pipe no further than 2 feet (.6 m) from the center of 
the vent pipe.  This placement avoids recirculation of flue 
products into the combustion air stream.

4.  The vent piping must terminate in an up-turned coupling 

as shown in FIG. 3-1.  The top of the coupling or the rain 
cap must be at least 36" (914 mm) above the air intake.  The 
air inlet pipe and vent pipe can be located in any desired 
position on the roof, but must always be no further than 2 
feet (.6 m) apart and with the vent termination at least 36" 
(914 mm) above the air intake.

Rooftop vent and air inlet terminations 
must terminate in the same pressure zone, 
unless vertical vent sidewall air is set up as 
shown in the General Venting - Vertical 
Vent, Sidewall Air Section.

 

BIRD SCREEN
[TYPICAL]

VENT OUTLET

36" MINIMUM

ABOVE AIR INLET

VENT

COMBUSTION AIR

12" [305 MM] MINIMUM
ABOVE ROOF /
SNOW LINE