909 SE EVERETT MALL WAY CRUCIBLE BREWERY 2025-03-28

4.5 Vent the Water Heater 4.51 Guidelines manufacturer for component assembly instructions. • If the vent system is to be enclosed, it is • Internal water heaters can be installed as suggested that the design of the enclosure direct vent or non-direct vent applications. shall permit inspection of the vent system. • When installed as Direct Vent, refer to the The design of such enclosure shall be "Direct Vent Approved Vent Manufactur- deemed acceptable by the installer or the ers and Products" section (within section local inspector. "4.5.4. 1. Direct Vent")for a complete list of • Any issues resulting from improper vent approved vent manufacturers and prod- installation will not be covered by warranty. ucts. • When installed as Non-Direct Vent(Room A WARN I N G Air), the vent must be Category IV, listed by a national recognized testing agency or • DO NOT use cellular core PVC/CPVC. schedule 40 PVC when accepted by local codes. DO NOT use Radel or galvanized material • Exhaust must be directly vented to the to vent this appliance. outside. Combustion air can be provided • DO NOT cover non-metallic vent pipe and from outside (Direct Vent) or from room air fittings with thermal insulation. (Non-Direct Vent). • DO NOT combine vent components from • If using room air(non-direct vent)for different manufacturers. combustion, ensure the required volume • DO NOT reduce the vent diameter. Vent of indoor air is available according to the diameter cannot be less than 2 in. (51 National Fuel Gas Code,ANSI Z223.1/ mm). NFPA 54. • DO NOT connect the venting system with • Avoid dips or sags in horizontal vent runs an existing vent or chimney. by installing supports per the vent manu- • Do not common vent with the vent pipe of facturer's instructions. any other manufacturer's water heater or • Support horizontal vent runs every 4 ft appliance. Rinnai water heaters can only (1.2 m) and all vertical vent runs every 6 ft be common vented with Schedule 40 PVC/ (1.83 m)or as per vent CPVC or with a Rinnai certified common manufacturer's instructions or local code vent system. requirements. • Venting should be as direct as possible with a minimum number of pipe fittings. • For manufactured vent systems, vent con- nections must be firmly pressed together so that the connections form an air tight seal. Follow the venting manufacturer's instructions. • Refer to the PVC/CPVC manufacturer for appropriate fittings, solvents or joining methods. • The vent piece connected to the water heater must be secured with 1 self-tapping screw. • Refer to the instructions of the vent system Rinnai Tankless Water Heater Installation and Operation Manual 26