Armstrong ASTRO 2 SERIES Installation And Operating Instructions Manual

A STRO 2 S E R I E S HOT WATER R E- CIRCU L ATIO N
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SYSTEM
I N S TA L L AT I O N A N D O P E R AT I N G I N S T R U C T I O N S
1.0 Typical application
2 .0 How it works
3 .0 Technical data
4 .0 Installation
1.0 typical applications
Armstrong Astro 2 Hot water
re-circulation systems au-
tomatically circulate water
through domestic hot water
distribution pipes. This helps
to ensure that everyone in the
household has "instant" hot wa-
ter at the tap when they need it,
while also helping to conserve
water and save water heating
energy costs. All systems are
assembled, wired, tested, and
then shipped from the factory,
ready for installation.
2.0 how it works
In normal operation, the Astro 2 automatically starts re-
circulating water throughout the hot water distribution system
whenever the timer enables activation. The timer can be set for
one or more activation periods per day. An activation period
consists of a multiple (up to 96) of 15 minute time intervals. The
timer includes manual on and off overrides to normal
automatic operation.
Some models are equipped with an Aquastat, intended for
use on metallic piping. The Aquastat enables operation only
when the sensed water temperature is below 85°f (25°c). Once
activated, the circulator operates until either the water tem-
perature reaches 105°f (41°c), or the current timed activation
period ends.
1 5 .0 Operation
1 6.0 Setting the clock/timer
1 7.0 Replacement parts
2
3 .0 technical data
technical data
Power Connection
Environment
Max. working pressure
Ambient temperature
Max. water temperature
Low temperature switchpoint
High temperature switchpoint
Clock/timer
Timer settings
Manual override
High/low temperature switch points are as measured on pipe surface
1
with the Aquastat (-ta models only).
materials of construction (wetted parts)
Pump casing
Pump shaft
Impeller
Bearings
Bearing seal
*Certified to nsf-372 Complies with section 116875 of the California Health
and Safety Code and Vermont Act 193 (Lead content of wetted surface is
0.25% or less.)
File No: 10.812
Date: july 23, 2015
Supersedes: 10.812
Date: july 09, 2015
6.0 ft (1.8 m) power cord, molded
duplex plug with ground
Indoor use only
150 psi (1034 kPa)
39°f (4°c) to 104°f (40°c)
230°f (110°c)
85°f (29°c) ±10%
1
105°f (40°c) ±10%
1
12-hour analog clock with am/pm
indication
Individual mechanical toggles
for each 15 minute interval over
24 hours
3 position slide switch; on/auto/off
Lead free bronze* or Stainless steel*
Ceramic
Noryl
Ceramic
epdm
4
5
5