Takagi TK-540P-PEH 10 GPM Propane Outdoor Tankless Heater 199K BTU


$1499.00


Weight: 70.00 lbs
MPN: TK-540P-PEH

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Takagi TK-540P-PEH Outdoor Propane condensing tankless water heater with integrated recirculation pump

The TK-540P-PEH (a.k.a TH-3) integrates a recirculation pump to provide instant hot water in residential applications with dedicated recirculation lines. The pump is easily controlled with a simple user interface and multiple pump settings allow you to customize pump operation to meet your needs while maximizing heater efficiency.

Feature Highlights

  • ENERGY STAR® qualified
  • Residential Warranty: 15-year Limited on Heat Exchanger. 5-year on parts, 1-year for labor
  • Commercial Warranty: 6-year Limited on Heat Exchanger, 5-year on parts, 1-year for labor
  • Integrated Recirculation Pump up to 100' with 1/2" pipe. Up to 500' for 3/4" pipe
  • Primary heat exchanger made of commercial grade copper that is more resistant to corrosion
  • Secondary heat exchanger made of type 316L stainless steel.
  • Complies with SCAQMD 1146.2 Ultra-Low NOx regulations of less than 14 ng/J (<20 ppm)
  • Easy-Link with up to three other TK-540P-PEH units for applications that need high hot water flow rates
  • Safety features
    • Air to Fuel ratio (AFR) sensor
    • Freeze protection
    • Overheat cut-off fuse
    • Exhaust and water temperature control
    • Diagnostic error codes for troubleshooting

Feature Details

Freeze Protection

Every tankless heater by Takagi has an internal freeze protection system, rated to protect the heaters in sub-freezing conditions. This prevents the water in the heat exchanger from freezing that would burst the water heater's waterway pipes.

Hi-Limit Switch

This ensures that the water temperature does not reach dangerous levels. It shuts off the gas valve to stop the the water heating.

Air-Fuel Ratio Sensor

Takagi's unique sensor technology monitors and maintains optimal combustion at all times. The onboard computer adjusts the fan motor speed for a proper air/fuel mixture ratio to minimize emissions and maximize efficiency.

HRS35 Copper Alloy

The HRS35 copper alloy is heat-resistant, with additive elements. This makes it much harder and stronger than the standard C1220 copper alloy typically used in other brands of heat exchangers. HRS35 is 8 times stronger than regular copper, even at high temperatures. It's also resistant to the damaging corrosion, which is the main cause of leaks in heat exchangers.

316L Stainless Steel Secondary Heat Exchanger

The secondary heat exchanger, where the remaining heat transfer occurs, is made of high quality 316L stainless steel. The lower temperature here causes acidic condensation, and stainless steel is needed to prevent corrosion. 316L stainless steel is the best material for condensing heat exchangers because of the extreme environment (heat, chloride, acidic condensation) that the material is exposed to.

Better Water Pathway Design

By redirecting and redesigning water flow, the heat exchanger drum and finned coil's temperature stay above dew point, making it more difficult for condensate to build up.

Heat Exchanger Fin Pitch

Widening the pitch of the heat exchanger fins improves durability by reducing blockage. Plus, it maintains higher temperature levels on the upper finned coils. The higher temps at the coils reduces the chances of condensate formation.

Match the Unit to Your Needs

 

Warmer Climates

70°F Incoming
Groundwater Temperature

Colder Climates

50°F Incoming
Groundwater Temperature

Capacity - Number of Shower Heads
TK-110/U 2 1
TK-310/U 3 2
T-TH3J 2 1
T-H3S 3 2
T-H3 4 3
TK-510/U 4 2
TK-540P 4 2
T-M32 4 3
T-M50 6 4

Flow Rate Guide (Values are in gallons per minute, "GPM".)

Temp Rise, °F 110/U 310/U 510/U T-TH3J T-H3S T-H3 TK-540P T-M32 T-M50
30° 6.6 8.0 10.0 6.6 8.0 10.0 10.0 9.0 14.5
35° 6.6 8.0 9.3 6.6 8.0 10.0 10.0 9.0 14.5
40° 5.7 7.8 8.1 6.6 8.0 9.5 9.5 9.0 14.5
45° 5.1 6.9 7.2 6.6 7.6 8.4 8.4 8.5 13.5
50° 4.6 6.2 6.5 6.1 6.8 7.6 7.6 7.7 12.2
55° 4.2 5.7 5.9 5.5 6.2 6.9 6.9 7.0 11.1
60° 3.8 5.2 5.4 5.1 5.7 6.3 6.3 6.4 10.1
65° 3.5 4.8 5.0 4.7 5.3 5.8 5.8 5.9 9.4
70° 3.3 4.4 4.7 4.3 4.9 5.4 5.4 5.5 8.7
75° 3.1 4.1 4.3 4.1 4.6 5.0 5.0 5.1 8.1
80° 2.9 3.9 4.1 3.8 4.3 4.7 4.7 4.8 7.6
85° 2.7 3.7 3.8 3.6 4.0 4.4 4.4 4.5 7.2
90° 2.5 3.5 3.6 3.4 3.8 4.2 4.2 4.3 6.8
95° 2.4 3.3 3.4 3.2 3.6 4.0 4.0 4.0 6.4
100° 2.3 3.1 3.3 3.0 3.4 3.8 3.8 3.8 6.1

Specifications

  Natural Gas, NG Liquid Propane, LP
Installation Type Indoor with Schedule 40 PVC 3" or 4" Direct Vent, or Outdoor
Dimensions 23.625" (H) X 17.75" (W) X 11.25" (D)
Weight Indoor model: 70 lbs. Outdoor model:68 lbs
Electric 120 V, 1.27 A (Operation), 0.07 A (Standby), 1.73 A (Freeze-Protection)
Ignition Electronic Ignition with included 120V plug
Noise Level 55 dB at maximum BTU output
Min. Input 15,000 BTU/h 13,000 BTU/h
Max. Input 199,000 BTU/h
Uniform Energy Factor ("UEF") 0.93 indoor, 0.95 outdoor
LEED Rating 1.5
ENERGY STAR® Qualified Yes
Min Gas Pressure 4.0" W.C. 8.0" W.C.
Max Gas Pressure 10.5" W.C. 14.0" W.C.
Maximum Flow Rate 10 GPM based on factory testing. 0.4 GPM required for continuous fire after initial ignition at 0.5 GPM.
8.0 GPM when the set temperature is 130 °F (55 °C) or higher.
Hot/Cold/Gas Connection 3/4" NPT
Coil Capacity ≈0.2 Gallons
Water Pressure 15-150 PSI. Pressure Only Relief Valve Requires (Min 200,000 BTUs, 150 PSI). 40 psi or above recommended for the 10 GPM max. flow.
Easy-Link System Up to 3 additional units, with no need for a system controller.
Dipswitches 100°F 105°F 110°F 115°F 120°F (Default) 125°F 130°F 135°F 140°F, 145°F 150°F 155°F 160°F 165°F 170°F 175°F and 185°F (17 options)
Temperature Settings 100°F to 185°F with 5°F intervals (16 options), 120°F Default Factory Setting
Remote Control Model # 100276687 remote included with outdoor model only. Max. distance 400’ from heater, 20 gauge wiring.

Dimensions

Warranty

Residential Use: 15 yrs limited heat exchanger, 5 yrs limited parts, 1 year labor
Commercial Use: 6 yrs limited heat exchanger, 5 yrs limited parts, 1 year labor

Downloads

User's Manual
Spec Sheet
Takagi Tankless Water Heater Product Line Brochure

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