Riverside Hydronics 1000 WBX 125A-IFC, Инструкция по установке и обслуживанию, Страница: 16 / 42

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7.5 Remote Air Consideration for Combined Remote Air Ducting
Each boiler MUST have separate intake piping. Consult factory for common air intake assistance.
8 VENTING
8.1
The Category IV gas vent connected to this appliance may terminate either above the roof surface or through the side
wall. It must comply with the latest edition of the National Fuel Gas Code, ANSI Z223.1 or, in Canada, CAN/CSA B149
Installation Codes, and the applicable provisions of the local building codes.

Follow the category IV vent manufacturers’ instruction for installation, sealing and support of their vent system.

For proper vent operation and to protect the gas vent from wind and weather, use ONLY the listed vent terminal
specified by the Category IV vent system manufacturer.

Important: Do not use a barometric damper when applying Category IV venting.
8.2 Category IV - The Centauri product operates with a positive vent static pressure, and with a vent gas temperature
that forms condensate in the vent.
This product uses the positive pressure generated by the burner system blower to push combustion products out of
the vent. The vent system must be a stainless steel and UL, ULC, ETL, or CSA certified for use with an appliance
requiring a Category IV, pressurized vent system. Seal all joints and support horizontal lengths of vent and follow all
installation instructions required by the vent manufacturer.
8.3 Maximum Category IV Vent Length (Equivalent Length)
A vertical or horizontal remote Category IV vent system must be used with this appliance. The maximum length of
field supplied Category IV vent is shown in the chart below titled Category IV Vent Equivalent Length.
Maximum Category IV Vent Equivalent Length
Vent Size 6” Vent 7” Vent 8” Vent 9” Vent
Max Equivalent Length 100 feet 130 feet 250 feet 450 feet
Pipe fittings reduce the maximum allowable vent length. Use the Category IV vent manufacturer’s equivalent length
deduction for all elbows, terminations, etc. If the information is not readily available from the vent manufacturer, use
the Vent Fitting Equivalent Length chart below to find the total equivalent length for all vent fittings in your
combustion air system. Then subtract this number of feet from the total equivalent length allowed in Maximum
Category IV Vent Equivalent Length chart above. The sum of this calculation is the maximum length of straight vent
allowed. If a longer length is required, repeat the calculation using a larger vent size. When using this chart, no
additional deduction is required for the addition of the vent system terminal.
Vent Fitting Equivalent Length
Vent Pipe: 6” Vent 7” Vent 8” Vent 9” Vent
90º Elbow 8 feet 9 feet 10 feet 11 feet
90º Long Radius Elbow 5 feet 5 feet 5 feet 6 feet
45º Elbow 5 feet 5 feet 5 feet 5 feet