Rinnai Grundfos GTK15 Pump Kit
Part Number: GTK15
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 (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 Guidance
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™.
Dimensions
Diagrams show Front, Top, and Side views with measurements:
Front View: Height: 6.50" (165 mm)
Top View: Width: 7.21" (183 mm)
Side View: Depth: 5.39" (137 mm)
Pump Performance Curve
The pump performance curve illustrates the relationship between pressure drop (in feet of head) and flow rate (in GPM). The graph shows that as the flow rate increases from 0 to approximately 25 GPM, the pressure drop decreases from approximately 18 feet of head to 0 feet of head.
Electrical Diagram and Wiring
The electrical diagram shows the GTK15 Pump Timer connected to the water heater cabinet. The wiring table details the connections:
| Description | GTK15 (Timer) | Supplied Line Cord |
|---|---|---|
| +115VAC | Brown (Br) | Black (Bk) |
| Neutral | Gray (Gy) | White (W) |
| Ground | Green (Gn) | Green (Gn) |
| GTK15 (Pump) Rinnai Circ-Logic™ | ||
| +115VAC (Circ-Logic™) | Red (R) | Black (Bk) |
| Neutral (Circ-Logic™) | Blue (Bl) | White (W) |
The diagram depicts a GTK15 Pump Timer unit. Wires are shown connecting from the timer to the water heater cabinet. Specific wire colors (Brown, Gray, Green for the timer; Red, Blue for Circ-Logic™) are indicated for +115VAC, Neutral, and Ground connections, as well as for the Rinnai Circ-Logic™ pump interface.
About Rinnai
Learn more about Rinnai high-performance Commercial and Residential Tankless Water Heaters, Hybrid Tank-Tankless Water Heaters, Boilers, Vent-Free Fan Convectors and EnergySaver® Direct Vent Wall Furnaces at: rinnai.us | rinnai.ca
Contact Rinnai America Corporation at 1-800-621-9419.
