Справочник Пользователя для Weil-McLain GOLD CGI-4E

14

Part Number 550-110-711/1108

Venting — general information

Chimney draft venting uses the natural draft provided by a ver-

tical vent or chimney. Category I appliance (non-positive vent

static  pressure  and  vent  gas  temperature  that  avoids  excessive 

condensate production in vent). See Section

. Chimney draft

installations use:

1.  Vent connector (single or doublewall) sized to eliminate posi-

tive pressure in vent system. Diameter increases immediately

at boiler.

2.  Doublewall metal vent (B-vent) or chimney with liner ap-

proved by the National Fuel Gas Code, ANSI Z223.1–latest

edition, or in Canada B149.1 or B149.2 Installation Code.

Direct exhaust venting uses inside combustion air with no com-

bustion air connector piping. The CGi-4E flue gas vent is pressur-

ized, requiring careful sealing of all joints. Category III appliance

(positive vent static pressure and vent gas temperature that avoids 

excessive condensate production in vent). See pages 15-19.

Direct exhaust installations use:

1.  Vent pipe specified in this manual.

2.  Vent termination through outside wall, roof or unused chim-

ney. Tight chimney areas will make vent joint construction 

very difficult.

Venting — chimney draft venting

1.  Use doublewall metal vent (B-vent) or chimney with liner as

required by the National Fuel Gas Code, ANSI Z223.1–latest

edition, or in Canada, B149.1 or B149.2 Installation Code.

2.  To prevent downdrafts, chimney should extend at least 3 feet 

above the highest point where it passes through a roof and 

at least 2 feet higher than any portion of a building within 

a horizontal distance of 10 feet.

3.  To vent with another appliance, see National Fuel Gas Code,

ANSI Z223.1–latest edition or in Canada B149.2 or B149.2

Installation Code

4.  Do not connect breeching to any portion of a mechanical

draft system that can operate under positive pressure.

5.  Maintain minimum 2” clearance from combustible materials

to vent pipe.

6.  Do not use chimney with an open fireplace.
7.  Make horizontal runs as short as possible. Long runs can 

cause condensation.

8.  When longer runs are used, support pipe with appropriate 

hangers.

9.  To prevent blockage, do not vent into bottom of chimney.
10. Vent pipe must not go beyond inside wall of chimney.
11. Vent  passing  through  floors  or  ceilings  must  be  fire-

stopped.

12. See

 and 

 to connect boiler to venting sys-

tem.

  Inspect existing chimney before installing boiler. Failure to 

clean or replace perforated pipe or lining will cause severe 

personal injury or death.

diameter

 Vent sizing given in

 is only a general guideline. The 

vent  connector  and  chimney  must  be  designed,  sized  and 

constructed in compliance with all applicable codes. Failure to 

correctly size and install the vent system could result in severe 

personal injury, death or substantial property damage.

venting

CGi-4E

5”