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D. Assembly of Crown 80/125mm Concentric Venting
(IMPORTANT - See Section C for 60/100mm Concentric Vent Assembly)
WARNING
Failure to follow the instructions could result in flue gas leakage into the combustion air or indoor air,
resulting in unsafe or unreliable operation.
• Do not lubricate concentric gaskets with anything other than water.
• Do not attempt to cut any piping except as permitted in this section. When cutting these sections, make sure
all cuts are square and allow for proper insertion.
• Do not attempt to try to mix this concentric pipe with other venting systems.
1) When BWC070, BWC090, or BWC120 boilers are vented using 80/125 venting, the 60/100 terminal section
and reducing elbow supplied with the boiler are not used. The components listed in Table 7.4b are required for
80/125mm installations and are not supplied.
The BWC151 is supplied with the following 80/125 components:
a) 80/125 Standard Radius Elbow
b) 80/125 Terminal Section
Before starting assembly of an 80/125 vent system, make sure that the planned installation is in accordance with the
“Vent System Design” Section of this manual and that all required 80/125mm vent components are on hand. Any
components not supplied with the boiler are available through Crown distributors.
FIGURE 7.30a: CUTTABLE STRAIGHT SECTION
26
FIGURE 7.30b: NON CUTTABLE STRAIGHT SECTION