Install Instructions

Pump Mounting: For Indoor Use

Arrows on the side or bottom of the pump chamber indicate

direction of ow 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. See Figure 3B.

It is recommend that isolation valves be installed on each side

of the pump. If possible, do not install elbows, branch tees, and

similar ttings just before or after the pump. Provide support to

the pump or adjacent plumbing to reduce thermal and mechanical

stress on the pump.

Installation Requirements

1. Thoroughly clean and flush the system prior to pump

installation.

2. Do not install the pump at the lowest point of the system where

dirt and sediment naturally collect.

3. Install an air vent at the high point(s) of the system to remove

accumulated air.

4. Ensure that water does not enter the terminal box during the

installation process.

5. (Open System) Install the pump in the supply line;

the suction side of the pump should be flooded with

water. Ensure that the static head requirement from

Table 2B is achieved.

6. (Closed System) Install a safety relief valve to

protect against temperature and pressure build-up.

7. If there are excessive suspended particles in

the water, it is recommended that a strainer and/or lter

be installed and cleaned regularly.

8. DO NOT START THE PUMP UNTIL THE SYSTEM HAS BEEN

FILLED.

CHECK VALVE REMOVAL:

1. Use needle nose pliers to remove check valve from pump

housing. 2. Check to make sure no part of the valve remains

in the pump housing. 3. Apply enclosed round "Check Valve

Removed" label over the Check mark symbol located on the

name plate of the pump.

Figure 3B

Acceptable

Unacceptable