B&D Mfg EA-KFC - Manual (Page 3)

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2. Open the ball valves on both sides of the pumps.
3. Remove the screw on the end of the Grundfos pump motor and rotate the motor shaft with a small screwdriver.
This vents air out of the pumping chamber and lubricates the motor bearings. When water appears at the screw
opening, replace the screw.
4. Close all loop header valves except one pair (See Fig. 3).
NOTE: Before proceeding, be sure there is sufficient water available to fill the system without stopping
the pumps or allowing the canister to run out of water.
5. Start the pumps and add water through the open top of the canister until a full stream of water is returning back
to the canister, or use a flow meter tool to determine the flow rate back into the canister.
CAUTION: To prevent damage to the pumps, only add clean potable water to the flow center.
6. Isolate all but one loop; when the first loop is full, close the loop valves. Open the next pair of valves to fill/flush
the second loop. Follow the same procedure to fill/flush all loops.
7. When the last loop is full and flushed, open all loop valves to the flow center. Water will now circulate through the
entire ground source system and the flow center.
PROCEDURE 2—FLUSH AN EARTH LOOP WITH A BURIED MANIFOLD (OPTIONAL)
1. Follow instruction sheet provided with flow center (How to Flush a Earth Loop with a Buried Manifold).
PROCEDURE 3—ADD ANTI-FREEZE
Anti-freeze may be added at any time.
1. Calculate the correct amount of anti-freeze for the system and dilute if necessary for good circulation.
2. Attach flow meter tool to the return tube on the flow center and place the discharge of the flow meter tool into
separate container. Operate the flow center while using the isolation valve above the pump to control the amount
of water discharged into the container. At this point, you can begin adding the anti-freeze through the top of the
flow center. This will allow you to estimate how much anti-freeze is being added to the system.
3. When the correct amount of anti-freeze is added, shut pump off. Place flow meter tool return tube back into the
canister and reactivate the pumps, continually running them to circulate and mix the anti-freeze.
4. Finish filling flow center to the bottom of the elbow on the loop side with water and/or anti-freeze and close the
canister cap hand tight only. DO NOT over tighten cap as it will be difficult to remove for future service and cause
damage to the flow center. A coating of petroleum jelly on the threads will help in removing the cap for the next
inspection. Use a flow center wrench (Part 1-FCW) when removing lid to prevent damage.
PROCEDURE 4—START-UP
1. By using the flow meter tool, monitor the flow (GPM) being pumped through the entire system. If the flow is not
correct, check that the proper flow center has been selected for the application using curves from Fig. 1 and 2. If
the pump curve indicates the proper flow center was installed and the GPM is less than the system requires, an
obstruction in the system is restricting flow.
NOTE: Remaining air will normally be eliminated over a 24-hour period.
2. Air elimination on inside headers is simply done by re-purging each loop through the flow center and adding
water as needed. On outside headers, it is best to let the flow center run. Open valve No. 2 to bypass the heat
pump. This will provide additional pipe velocity on the ground loop and help remove air. During normal operation
air will continue to be eliminated through the flow center.
NOTE: If the water level inside the canister changes after the pumps are turned off air is present in
the system. Continue to purge the system until all air is removed.