navien high efficiency tankless water heater navien america inc
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NAVIEN High Efficiency Tankless Water Heater
Navien America Inc.
Navigating Energy/Environment
NAVIEN Condensing Water & Combination Heater
Model NCR
Air Pressure Sensor
2&3 StageGas Sol V/V
Pre‐Mixed Burner
Heat‐Exchanger(Main)
Secondary Heat‐Exchanger
Gas Pressure Sensor
Gas Control Valve
Condensate Drain
Turbo FAN(BLDC Motor)
Buffer Tank
Flow Sensor
Recirculation Pump
3‐Way Valve(Manual)
Flow Control Valve
NAVIEN Condensing Models 2008.
ResidentialNCR-180 NCR-210 NCR-240
NCR-180A NCR-210A NCR-240A
CommercialCC-240
CC-240A
Where:
CR: Residential Model CC: Commercial Model
“A”: Optioned Circulation pump and Mini Buffer Tank
NAVIEN Condensing Specifications
Specifications Comparison
Navien NCR-180
Navien NCR-180A
Navien NCR-210
Navien NCR-210A
Navien NCR-240
Navien NCR-240A
Input BTU (NG) 150,000 150,000 180,000 180,000 199,000 199,000
Combustion Efficiency
(NG)97.4% 97.7% 98.1% 97.7% 98.0% 97.3%
EnergyFactor 0.96 0.94 0.95 0.94 0.95 0.95
Cold Water Sandwich Effect
Cold water sandwich effect:
Cold water sandwich effect comes from during frequent ON/OFF operation of a tankless water heater. It comes from basic tankless water heater operating principles. Typically when tankless water heater starts from city water temperature to setting temperature, it will take time about 15 ~25 second. This performance creates cold water sandwich.
Navien residential and commercial with optional buffer tank will minimize cold water sandwich.
NAVIEN Condensing Cold Water Sandwich Effect
NAVIEN Condensing Cold Water Sandwich Effect
NAVIEN Condensing Cold Water Sandwich Effect Test Graph
NAVIEN Condensing water heater Installation, Venting
Venting Materials (Category 4 appliances)
Navien Recommended Vent Materials
Model Type Materials
CR‐180, CR‐180ACR‐210, CR‐210ACR‐240, CR‐240A
PVC Schedule 40**ABS Schedule 40**
CC‐240, CC‐240APVC Schedule 40**ABS Schedule 40**
** Installed vertically, Horizontally or Mixed with Non Foam Core PVC or ABS*** The air intake vent materials can be made of ABS, PVC, galvanized steel, corrugated aluminum or any other such materials.
NAVIEN Condensing water heater Installation, Venting
Allowable Vent Lengths
MODELSERIES
MAXLENGTH
MAX # ofELBOWS EQUIVALENT LENGTHS
180 100’ 6
Reduce the maximum vent lengthaccordingly for each elbow used:
Each 90˚elbow equates to 5 linear feet of vent.Each 45˚elbow equates to 2 linear feet of vent.
210 100’ 6
240 100’ 6
NOTE: The maximum lengths listed above are for the exhaust vent section only. The intake vent length can be of equal length.
NAVIEN Condensing water heater Installation, Venting
Direct Venting Configuration
Center to Center of Exhaust and Intake air: Minimum 12 Inches
Thank you!
Ted Kwak
Navien America Inc.
Navigating Energy/Environment