Takagi TK-310U-I tankless water heater model is a direct replacement for T-K4-IN 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.
TK-310U-I indoor heater now includes a built-in temperature control on the front panel.
Cross-References:
- Rinnai: V75i (HE Series)
- State: GTS-310U-I
- American: GT-310U-I
- Ultra-Low NOx
- Field convertible from natural gas to propane (kit included)
- Factory-installed power cord with plug
- Temperature controller on front panel
- Built-in freeze protection
- Manual Reset Hi Limit (up to 194°F)
- Overheat cutoff fuse
- Inlet and outlet thermistors for constant temperature monitoring
- Air/Fuel ratio rod
- Flame sensor
- Electronic ignition - no standing pilot
- Complies with SCAQMD Rule 1146.2 (California & Texas)
- Complies with lead free standards
- AHRI certified.
- Shower capacity at 70F (warm climates): 3.5 showers
- Shower capacity at 50F (cooler climates): 2.5 showers
- Fuel Type: Natural Gas (Propane conversion kit is included)
- Gas Connections: 3/4" NPT
- Gas Consumption Input: 15,000-190,000 BTU/H
- Inlet Gas Pressure: 4.0-10.5" in W.C. (for Natural Gas)
- 8.0-14.0" in W.C. (for Propane)
- UEF: 0.82
- Hot/Cold Connections: 3/4" NPT
- Water Connection Locations: Bottom
- Max GPM: 8
- Water Pressure: 15-150 PSI
- Weight: 39 lbs
- LEED Rating: 0.0
- Emissions: less than 14 ng/J
- Flue/Exhaust: 4" (Category III Stainless Steel)
- Air Intake: 3" Cat. III Stainless, Flex. Aluminum, PVC or ABS
- Vent: 60' Max Length, 6 elbows max
- Max. Elevation: 10,100 ft
- Power Source: 120V/60Hz.
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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