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Spec Sheet Install Manual

The Grundfos Pump and Timer Kit improves upon the exceptional engineering behind Rinnai Tankless Water heaters by ensuring the delivery of a constant stream of hot water during a preset schedule. Scheduling for times of use saves money by reducing wasted energy during dormant periods.

Kit Contents:

  • Grundfos 15 - 55 pump with timer and internal check valve
  • 6 Ft (2 m) electrical cord
  • 6 Ft (2 m) BX conduit pre wired to pump (includes in line 4 Amp glass fuse)
  • Wire Nuts (Qty 5)
  • Flange kit
  • Rinnai Circ-Logic™ Manual

Specifications:

  • Housing Material: Stainless Steel with Check Valve
  • Flow Range: 20 GPM
  • Head Range: 17 ft
  • Max Liquid Temperature: 150 F
  • Max System Pressure: 145 PSI
  • Input Voltage: 115V
  • Frequency: 60 Hz
  • Max Amperage: 0.75A
  • Connection Size: 3/4" Flange
  • Weight (Pump/Flange Kit Combined): 8.9 lbs.
  • Pipe Length:
    Equivalent pipe length using Grundfos GTK15 pump at
    120°F (49° C) = Up to 200 Ft (61 m) (3/4” piping)
    Equivalent pipe length includes supply piping, return piping and fittings. The
    installer/contractor/engineer must calculate the total equivalent pipe length of
    the piping system.
  • Warranty: Manufacturer's Warranty Applies

Timer Control:

  • Designed to turn the pump on and off at preset times.
  • Shortest Switching Interval: 15 minute increments
  • Protection: Clear Plastic cover for dust and moisture protection of clock face.
  • Modes: Timer, on ( override ) and off ( override )

Requirements:

  • Grundfos GTK15 Kit must be used with Rinnai Tankless Water Heaters utilizing Rinnai Circ-Logic™.



The GTK15 recirculation pump timer is not compatible with SENSEI™ Tankless Water Heaters.

When a GTK15 recirculation pump is used with a SENSEI™ Tankless Water Heater, the integrated timer on the pump is not compatible with the tankless water heater. SENSEI™ Tankless Water Heaters include a diagnostic feature that monitors the recirculation flow rate. If recirculation flow is low or not detected, the tankless water heater will display diagnostic code 63. While code 63 is displayed, hot water will remain available from the tankless water heater but the recirculation pump will be disabled until the source of the diagnostic code is identified and resolved.

Color may vary

 

 




Over the years, a select few products have risen above the rest with their unparalleled performance. We're thrilled to share these gems with you. Whenever you spot the "From the Frog" badge, rest assured it's more than just a mark of quality—it's a symbol of our dedication and careful consideration in choosing the best for you. 

Housing Material Stainless Steel with Check Valve
Flow Range 20 GPM
Head Range 17 Ft (5 m)
Max Liquid Temperature 150° F (65° C)
Maximum System Pressure 145 PSI
Input Voltage 115 V
Frequency 60 Hz
Max Amperage 0.75 A
Connection Size 3/4” Flange
Weight (Pump/Flange Kit Combined ) 8.9 lbs. (4 kg)
Pipe Length
Equivalent pipe length using Grundfos GTK15 pump at
120°F (49° C) = Up to 200 Ft (61 m) (3/4” piping)
Equivalent pipe length includes supply piping, return piping and fittings. The
installer/contractor/eng

Shipping Depth (inches/mm)
8 in / (203 mm)
Shipping Height (inches/mm)
8 in / (203 mm)
Shipping Width (inches/mm)
8 in / (203 mm)
Shipping Weight (lbs/kg)
8.2 lb / (3.72 kg)

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