The upgraded NCC199CDV Commercial Condensing Water Heater from Noritz America offers a 10-year warranty on its redesigned dual stainless steel heat exchangers. Now produced as a single-piece structure for servicing ease, the heat exchangers also incorporate improvements in corrosion resistance and heat-shock durability.
The re-engineered NCC199CDV also features a Uniform Energy Factor of 0.97 and a now fully integrated exhaust non-return valve that speeds common venting for up to six heaters without the need for additional accessories. Because the valve is built into the heater, operational safety is assured, and installation time and cost are reduced.
As with the predecessor model, unveiled in 2017, the upgraded NCC199CDV offers a maximum input of 199,900 Btu per hour; a capacity range of 0.29 to 11.1 gallons per minute; water temperatures from 100 F to 185 F; and a thermal efficiency rating of 98 percent /0.97 UEF. The NCC199CDV can also direct-vent, using either 2-inch or 3-inch PVC, CPVC, or rigid polypropylene materials. However, vent lengths have been extended 65 feet for 2-inch pipe, up from the previous 60 feet; and 150 feet (instead of 100 feet) for 3-inch pipe. The units can also be installed outdoors or on a rooftop with an optional vent cap.
Up to 24 NCC199CDV units can be linked together in a single system, using a Multi-Unit System Controller, to meet the hot-water needs of high-volume commercial and industrial applications; restaurants, schools, assisted living facilities, breweries, hospitality, correctional facilities, factories. The controller offers control options, including aqua-stat and timer pump controls plus application settings for recirculation loops and supplemental storage tanks. Inputs can range from 18,000 to 4.8 million BTU/h (for a 24-unit multi-system), yielding up to a 266:1 turndown ratio. An optional Quick-Connect cable is available for connecting two units.
Built-in Exhaust Non-Return Valve: Integrating this valve into the water heater should cut job-site labor by as much as 25 percent by sparing the installer the task of having to install the valve externally between the water heater and the common-vent header. Another advantage; eliminating the external valve allows for lower-profile venting.
Meanwhile, the built-in valve offers peace of mind to system designers, installers and building owners, because harmful exhaust gases of one water heater cannot backflow into a non-operational unit.
Heat Exchanger Warranty: The 10-year heat exchanger warranty — up from five years for the predecessor model — is the direct result of the proprietary design. The upgrade involves the blending of several types of ferrite and austenite stainless steel — rather than relying on only one.
For example, stainless types SS 304 and SS 316L offer corrosion resistance. Which is why the NCC199CDV confines them to those sections that are in contact with the acidic condensate produced by the combustion process, thereby doubling the corrosion resistance of previous models. But Noritz has found that these two types lack the ideal tensile strength to handle super-high temperatures repeatedly. To prevent cracking under such extreme conditions and boost heater durability, the redesigned heat exchanger incorporates two other types of stainless steel, JFE434LN2 and NSSC220ECO, in the sections with high thermal stress.
In a further improvement, Noritz now fuses the two heat exchangers into a single component. The logic here is labor-savings. Service technicians will be able to remove and replace a single heat exchanger body, rather than having to remove and reassemble two separate parts.
Other key features include:
- Compact design: The NCC199CDV is only 70 pounds, 11 fewer than its predecessor, thanks to the inclusion of the lighter stainless materials. (The previous model used only SS 316L.) The compact designed heater can be wall-mounted. Mounting brackets line up with the top of the unit, enabling installers to position it on the wall.
- Racking capability: The ability to combine (or rack) multiple units offers peace of mind through redundancy: If one unit requires servicing, others can continue to provide hot water.
- Ultra-low-NOx, modulating Eco-Burner: The premix, fully modulating burner has a nitrogen-oxide emissions level of only 14 parts per million, exceeding the South Coast Air Quality Management District requirement of 20 ppm. The use of a Venturi gas valve optimizes the air/fuel ratio to match energy consumption to present demand with pinpoint accuracy. If the burner’s intake is blocked with debris, leading to sub-optimal oxygen levels, the Venturi valve will still blend the correct amount of gas to yield proper combustion. The result, improved efficiency and safe operation with fewer moving parts.
- WiFi-enabled: Compatibility with the Noritz Connect app allows the user wireless remote control of heater functions, as well as diagnostic and maintenance reminders. The NCC199CDV can be integrated with building management and automation systems (BMS and BAS) found in a number of modern commercial applications, such as schools and office buildings.
- High-altitude performance: The NCC199CDV can perform at an altitude of up to 10,000 feet in both LP and NG gas types.
- Safety Devices: The NCC199CDV has built-in safety devices, including a flame sensor, overheating and lightning prevention devices, freeze protection, and neutralizer overfill. An optional carbon monoxide alarm can also be connected.
Read additional information about the NCC199CDV Commercial Condensing Water Heater.