AHRI K2WT, Installation, Operating And Service Instructions

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Vii. Venting
H. Assembly of Centrotherm InnoFlue Vent Systems
H. Assembly of Centrotherm InnoFlue Vent Systems
1. This boiler has been approved for use with the Centrotherm InnoFlue single wall Polypropylene vent system to be provided
by the installer.
Warning
Asphyxiation Hazard. Follow these instructions and the installation instructions included by the
original Polypropylene venting component manufacturers, Centrotherm. Failure to do so could cause
products of combustion to enter the building, resulting in severe property damage, personal injury
or death. Where a conflict arises between Centrotherm instructions and these instructions, the more
restrictive instructions shall govern.
Do not mix vent components or joining methods for listed manufacturers.
Examine all components for possible shipping damage prior to installation.
All condensate that forms in the vent must be able to drain back to the boiler.
2. Assemble the vent system, starting at the boiler:
a. The vent adaptor has two different inside diameters. The smaller, lower, inside diameter accepts 3” nominal InnoFlue
(Figure 7.27). A locking ring in the adaptor prevents the vent pipe from coming out of the adaptor once it is inserted.
Lubricate the upper gasket in the vent adaptor with water and insert the first piece of 3” InnoFlue into the adaptor until it
bottoms out.
nOTiCE
Once a vent pipe is inserted into this adaptor, it is IMPOSSIBLE to remove it. Make sure the correct type of
pipe is selected, and that it is of the correct length, before inserting it into the vent adaptor.
b. If 2” InnoFlue is to be used for the vent system, reduce the first piece of 3” InnoFlue installed in Step (a) to 2” using
Centrotherm # ISRD0302. Otherwise assemble the next piece of 3” InnoFlue.
c. For each joint, verify that the gasket is evenly seated in the bell (female) end of the pipe. Lubricate this gasket with
Centrocerin # IACE50. Slide a connector ring over the male end of the pipe to be joined as shown in Figure 7.44. Push
the male end of the next section of pipe into the bell until it bottoms out, then back out 1/4” to provide room for thermal
expansion. Push hook on connecting ring over the bell end of the first section of pipe as shown in Figure 7.44.
d. Assemble the rest of the vent system per the manufacturer’s installation instructions, being sure to pitch horizontal
sections back towards the boiler 5/8”/ft.
e. Support each horizontal pipe section with a minimum of one wall strap each and at intervals not exceeding 39in.
Figure 7.44: innoFlue Connector ring installation