Description
Takagi TK-310U-E outdoor tankless water heater model is a direct replacement for T-K4-OS Natural (NG) and Propane (LP) gas non-condensing models and is intended for small to medium residential applications. The new unit uses natural gas by default and comes with a propane conversion kit. The heater includes a remote temperature control.
Cross-References:
- Rinnai: V75e (HE Series)
- Navien: NPN-180-E
- State: GTS-310U-E
- American: GT-310U-E
Features:
- Remote temperature controller included
- Field convertible from Natural Gas to Propane (kit included)
- Fully modulating, non-condensing, with copper heat exchanger
- Up to 8.0 GPM max flow rate
- 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
- Outdoor model – no vent pipes needed
- Electronic ignition – no pilot light
- Wall-mounting design with integrated brackets
- AHRI certified, Low-Lead compliant, Low Nox (SCAQMD Rule 1146.2 – California & Texas, NG models only)
Technical Specifications:
- Shower Capacity: 3 – 2 Showers (4.2 GPM @ 75°F rise; 5.8 GPM @ 55°F rise; 8.0 GPM @ 40°F rise)
- Min Flow: 0.4 GPM
- Gas Input (Min – Max): 15,000 – 190,000 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
- Installation Altitude: 0 – 2,000 (de-rate for higher elevations, up to 10,100ft max – see manual for details)
- Power Supply: 120V, 60Hz (hardwired)
- Consumption: 79W Operation, 2W Stand-by, 96W Freeze protection
- Dimensions: 13-3/4″ Wide x 22-1/2″ High x 10″ Deep
- Weight: 37.5 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
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