Description

Takagi TK-510U-I model is a non-condensing indoor natural gas (convertible to propane w/ kit included) tankless water heater, intended for small to medium residential & commercial applications.

Cross-References:

Rinnai: V94i (HE Series)
Noritz: NR981-SV (Standard)
State: GTS-510U-I
American: GT-510U-I

Features:

Factory-installed power cord with plug
Field convertible from Natural Gas to Propane (kit included)
Fully modulating, non-condensing, with copper heat exchanger
Up to 10 GPM max flow rate
Suitable for commercial applications
Built-in safety features include freeze protection, manual reset hi limit (up to 194F), overheat cut-off fuse, inlet & outlet thermistors (for constant temperature monitoring), air-fuel ratio rod and flame sensor
Flue vented using Cat. III stainless steel (such as Z-Vent or NovaVent)
Electronic ignition – no pilot light
Temperature controller on front panel
Wall-mounting design with integrated brackets
NSF certified, AHRI certified, Low-Lead compliant, Low NOx (SCAQMD Rule 1146.2 – California & Texas, NG models only)

Technical Specifications:

Shower Capacity: 4 – 2.5 Showers (4.5 GPM @ 75°F rise; 6 GPM @ 55°F rise; 8.2 GPM @ 40°F rise, 10GPM @ 30°F rise)
Min Flow: 0.4 GPM
Gas Input (Min – Max): 15,000 – 199,000 BTU/h
Fuel Type: Natural Gas (4 – 10.5 WC pressure) or Propane (8 – 14 WC pressure) – LP conversion kit included
UEF: 0.81
Hot & Cold Water Connections: 3/4″ NPT
Gas Connection: 3/4″ NPT
Flue/Exhaust: 4″ (up to 60ft of pipe length equivalent, max. 6 elbows) – Cat III Stainless Steel only
Combustion Air Intake: 3″ (up to 60ft length, 6 elbows max) – Flexible Aluminum Duct, Cat. IV (PP, PVC or CPVC) or Cat. III (St. Steel)
Installation Altitude: 0 – 2,000 (de-rate for higher elevations, up to 10,100ft max – see manual for details)
Power Supply: 120V, 60Hz (factory wired plug-in cord)
Consumption: 82W Operation, 3W Stand-by, 97W Freeze protection
Dimensions: 13-3/4″ Wide x 22-1/2″ High x 10″ Deep
Weight: 39.7 lbs

Warranty:
15-year limited warranty on heat exchanger in residential applications/5-year limited warranty on heat exchanger in commercial applications/5-year limited warranty on all parts