Armstrong ASTRO 225SSU-TA Manuale di installazione e istruzioni per l'uso - Pagina 4

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i nstal latio n &

operati ng instruction s

timer /discharge orientation (as shipped)

top timer access,

down discharge

5 Connect the hot water return line to the circulator, verifying

proper flow direction.

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.

Astro 2 series

Hot water re-circulation system

side timer access,

horizontal discharge

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 alter-

nate 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 cas-

ing 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:

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.

5 .0 oper ation

caution

Never operate the system 'dry' or permanent dam-

age 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 house-

hold 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.