Armstrong ASTRO 225SSU-TA Istruzioni per l'installazione e il funzionamento - Pagina 4

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6. Attach the Aquastat by the integral spring clip, to either the circulator inlet or discharge piping, whichever is most

convenient. Ensure the concave sensor face of the Aquastat remains in direct contact with the pipe surface.

7. Supply water to the system and inspect connections and components for leaks.

8. In order to purge the air from the recirculation line:

Make sure that the system is connected to the cold water line and no fixtures are in use in the building.

ii.

Close the blow down valve.

iii. Open the drain valve. Wait until all the air is purged from the system and the water flow is steady through the

drain valve.

iv. Close the drain valve.

Vent the circulator to remove trapped air:

v. Place a one gallon or larger container under the circulator.

vi. Loosen the brass plug in the end of the circulator with a slotted screwdriver until water just begins to run out

into the container.

vii. When the vented water is free of air bubbles, gently retighten the brass plug until sealed.

viii. Open the blow down valve.

The system is purged by air and ready for operation.

9. Verify that the timer's manual override switch is in the "OFF" position.

10. Plug the power cord into a standard 115 V ac electrical receptacle.

11. To perform an initial system test for basic operation, see OPERATION.

ROTATING THE CIRCULATOR CASING

Prior to connecting the system to the hot water piping, if alternate orientation of either the circulator discharge or clock

timer is required, proceed as follows:

1. Remove the four hex socket head screws that hold the casing to the circulator.

2. Gently pull the casing from the circulator body, taking care not to damage the gasket or impeller.

3. Rotate the casing as required to meet circulator discharge and clock timer orientation requirements.

4. Tighten the four hex socket head screws evenly, ensuring the gasket seals the mating surfaces.

5. To verify the circulator shaft still spins freely:

i. Remove the plug from the end of circulator with a slotted screwdriver.

ii. Insert the screwdriver in the slot in the end of the shaft.

iii. Ensure the shaft turns freely and smoothly in both directions.

iv. Replace the plug and gently tighten.

OPERATION

CAUTION: Never operate the system "dry" or permanent damage may occur to the circulator. Never shut off the water

supply or restrict flow in any way while the circulator is operating.

1. Verify water is present at the circulator.

2. Verify the power cord is plugged into an appropriate household

electrical receptacle.

3. To continuously run the circulator or test for initial operation, set

the manual override switch to the "ON" position and verify the

circulator operates smoothly and quietly.

4. To prevent circulator operation, such as for extended periods

that the residence will be V acated, set the manual over ride

switch to the "OFF" position.

5. For normal automatic operation, set the clock/timer as required

and move the manual override switch to the "AUTO" position.

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Manual Override

Switch Positions

AUTO

OFF