Install Instructions

installation &
operating instructions
Astro 2 series
Hot water re-circulation system
3
procedure
If required please see below union/ flange kit chart
lead free union fitting sets*
(contains two (2) half unions & gaskets)
Model Part No. Connection Wt. (lbs.)
astro
220ssu/225ssu
810120-320
1.25" npsm × 0.5"
Sweat Lead Free
2
astro
220ssu/225ssu
810120-322
1.25" npsm × 0.75"
Sweat Lead Free
2
astro
220ssu/225ssu
810120-324
1.25" npsm × 0.75"
fnpt Lead Free
2
lead free bronze flange kit
(contains two flanges, gaskets and nuts/bolts)
Model Part No. Pipe Size Wt. (lbs.)
astro 230/250ss 816013-841 0.75" 2
astro 230/250ss 816012-841 1" 2
astro 230/250ss 816011-841 1.25" 2
astro 230/250ss 816009-841 1.5" 3
1 Timer installation and wiring
Note: Numerical component designations included in Steps i
through viii refer to circulator and timer components shown
in fig. 1. Steps 1 & 3 apply to retrofit installations.
i Disconnect the electrical supply to the circulator
ii Unfasten the mounting 2 screws
4 and remove the
terminal box cover
3.
iii Disconnect wire leads from the power supply.
iv Connect power supply wires (black, white and green) to
the timer unit and to the circulator terminals (as shown
in fig.2). Note: Lead Wiring Specification - Minimum,
6" (152 mm) long, 14 awg, rated minimum 140°f (60°c).
Provided with r/c crimp connectors for attachment to
the ground.
v Place the timer box cover
5 using the 2 mounting
screws
4. Insure that all lead wires are inside the timer
assembly.
vi Program the timer according to instructions provided
on page 5
vii Connect the unit to electrical supply.
viii Start the circulator
Assembly - Exploded Layout
fig. 1 Astro 2 Series circulator and 24-Hour Timer assembly
drawing
1 Pump 4 Mounting screw
2 Terminal box base 5 Timer box cover
3 Terminal box cover 6 Timer module cover
fig. 2 Astro 2 Series circulator and 24-Hour Timer wiring
diagram
fig. 3 Astro 2 Series circulator and 24-Hour Timer and
Aquastat Control wiring diagram
1
2
3
44
6
5
green
timer
green
white
white
black
white
black
black
black black
timer
green
white
white
white
aquastat
white
black
black
black
black black