Rinnai Circ-Logic Installation And Operation Manual page 5

•
Thoroughly clean and flush the system prior to pump installation.
•
Do not install the pump at the lowest point of the system where dirt and sediment naturally
collect.
•
Install an air vent at the high point(s) of the system to remove accumulated air.
•
Ensure that water does not enter the terminal box during the installation process.
•
Install the pump as shown on the system drawings; the suction side of the pump should be
flooded with water.
•
DO NOT START THE PUMP UNTIL THE SYSTEM HAS BEEN FILLED AND CHECK FOR
LEAKS OR OTHER POSSIBLE COMPONENT FAILURES.
Proper installation of the pump will have the terminal box located to one side of the pump or the other,
with the conduit entry down (Figure 1A).
The arrows on the side or bottom of the pump housing indicate direction of flow through the pump.
GRUNDFOS circulators can be installed in both vertical and horizontal lines. The pump must be
installed with the motor shaft positioned horizontally. Under no circumstances should the pump be
installed with the shaft vertical or where the shaft falls below the horizontal plane (Figure 1B).
Figure 1B
It is recommended that isolation valves be installed on each side of the pump. If possible, do not install
elbows, branch tees and similar fittings just before or after the pump. Provide support to the pump or
adjacent plumbing to reduce thermal and mechanical stress on the pump.
Rinnai Circ-Logic with Grundfos GTK03 Kit
Figure 1A
5