Armstrong ASTRO 220SSU050S-LC Istruzioni per l'installazione e il funzionamento - Pagina 3

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Fig. 1 Astro 2 Series circulator and 24-Hour Timer assembly drawing
2. Select a suitable location for system installation. Typically, the Astro
system is mounted near the hot water heater. The inlet is connected to a
return line from the furthest hot water tap in the system. The discharge is
connected into the hot water heater drain line.
3. Ensure the following conditions are met when the system is mounted:
i.
The circulator shaft is horizontal.
ii.
The clock/timer face is accessible for viewing and adjustment.
iii. The direction of water flow matches the arrow on the circulator casing.
iv. The piping is sufficiently rigid to support the system in operation.
v. Neither the clock/timer nor black terminal box is under the circulator.
4. The Astro system is shipped fully assembled and tested to suit either down
discharge orientation with the clock timer facing up, or horizontal discharge
with the clock timer facing the water supply side. For alternate orientation, see
ROTATING THE CIRCULATOR CASING.
Top Timer
Access,
Down
Discharge
5. Connect the hot water return line to the circulator, verifying proper flow direction.
TIMER
BLACK
WHITE
G
BLACK
WHITE
AQUASTAT
Fig. 3 Astro 2 Series circulator and 24-Hour Timer and Aquastat Control wiring diagram
Timer/Discharge
F
L
(as shipped)
O
W
TIMER
BLACK
WHITE
GREEN
G
Fig. 2 Astro 2 Series circulator and 24-Hour Timer wiring diagram
Green Ground
Screw in timer box
GREEN
WHITE
BLACK
Orientation
Page 3 of 5
Green Ground
Screw in timer box
GREEN
WHITE
BLACK
Side Timer
Access,
Horizontal
Discharge
FLOW