Armstrong Astro 2 User manual

Astro 2
circulator
models
Installation and
operating instructions
File No: 10.89
Date: august 05, 2013
Supersedes: 10.89
Date: june 26, 2013

contents
1.0 Introduction 4
2.0 Installing 4
2.1 Terminal box 4
2.2 Electrical wiring 5
3.0 Check valve removal (optional) 5
4.0 Start up 5
5.0 Installation troubleshooting guide 6
6.0 Spare parts 7

installation &
operating instructions
Astro 2
circulator models
4
warning
•Prior to installation, read these installation and
operating instructions. Installation and
operation must comply with local regulations and
accepted codes of good practice.
• The use of this product requires experience with and knowl-
edge of the product. Only licensed or trained installers
should install this product.
• For supply Connection, use wires acceptable for at least
90°c (194°f).
• Risk of shock: this pump has not been tested for use in
swimming pools or marine areas.
• To reduce risk of electric shock: Unplug before servicing,
see instructions for proper installation, connect to a prop-
erly grounded, grounding type receptacle only.
• For indoor use only.
• Use copper conductors only.
• Do not install with motor above or below pump body.
• Do no submerge.
• Do not run pump dry.
These installation and operating instructions are applicable to the
following Astro 2 models.
1.0 introduction
You are about to install a pump from the finest multi-speed wet
rotor circulator line on the market today. The Armstrong Astro
2circulators are designed for closed hydronic or potable water
systems. Their intended use is for circulating water or glycol
solutions. For pumping domestic water use non-ferrous lead
free bronze or stainless steel body pump construction.
The Astro 2 operates extremely quietly and is lubricated by the
system liquid being pumped by the circulator.
These circulators except Astro 286 are designed to work at
temperatures and pressures up to 230°f (110°c) and 150 psi.
Astro 286 is designed to work at temperature and pressure
upto 150°f (65°c) and 150psi. For fluid temperature upto 185°f
(85°c), operating current must not exceed 1.35a. For lead free
bronze and stainless steel pumps used in potable water sys-
tems, it is recommended that the operating temperature of the
fluid be kept as low as possible (i.e. below 150°f/65°c) to avoid
precipitation of calcium.
When unpacking the circulator, inspect for any damage that
may have occurred during transit. Check for loose, missing or
damaged parts.
2.0 installing
We recommend that any soldering be done before the pump
is actually installed. This will eliminate the possibility of solder
dropping into the pump body.
Thoroughly flush the system out before installing the circulator.
Before Installing, check that the flow direction of the water
through the pump body matches the arrow on the circulator
body. The circulator is supplied for up discharge installation.
Install the circulator in either the outlet or inlet line to the boiler
or hot water heater. It is important to install these circulators
with the split between the circulator body and the motor in a
vertical position. This ensures ecient operation.
See installation examples.
astro 2 models
model electrical
input
rating
astro 210ci
115v, 60hz
Single phase
200w, 1.72a
astro 210ss 200w, 1.72a
astro 220ssu 33w, 0.29a
astro 225ssu 83w, 0.69a
astro 225bs ½" swt 75w, 0.64a
astro 225bs O" swt 75w, 0.64a
astro 230ss 97w, 0.81a
astro 230ci 97w, 0.81a
astro 230ci-r 97w, 0.81a
astro 250ss 117w, 0.98a
astro 250ci 117w, 0.98a
astro 250ci-r 117w, 0.98a
astro 280ci 218w, 1.9a
astro 280ss 218w, 1.9a
astro 290ci 218w, 1.9a
astro 290ss 218w, 1.9a
astro 280ci 230v
230v, 60hz
Single phase
210w, 0.9a
astro 280ss 230v 210w, 0.9a
astro 286ci 370w, 1.6a
astro 286ss 370w, 1.6a
incorrect installationscorrect installations

installation &
operating instructions
Astro 2
circulator models
5
The circulator shaft must always be in a horizontal position.
(The piping can be in a horizontal or vertical run.) Isolation
valves should be installed on the discharge and suction side of
the pump to facilitate service.
2.1 terminal box
Always install the circulator with the terminal box above or be-
side the motor. If the terminal box is under the motor as initially
mounted, remove the motor mounting screws and rotate the
motor to the proper position. (See example.)
Ensure the gasket is intact and seated before evenly retighten-
ing the mounting screw to 4.5 - 5.5 lb/ft (6 - 7.5 Nm). To ensure
the rotor still spins freely, temporarily remove the plug (located
in the middle of the nameplate), insert a flat head screwdriver
into the slot in the end of the rotor shaft and turn.
Retighten the plug to 1.5 - 2 lb/ft (2 -2.7 Nm). Ensure no water
leak at all sealing contacts.
Do not hang items or articles of clothing on the pump as air
must be able to circulate freely through the motor. Do not
operate the circulator without the motor plug installed.
2.2 electrical wiring
The electrical wiring must be installed strictly in accordance
with national electrical codes, local codes and regulations.
1Electrical installation should be conducted by a
qualified electrician.
2Always make sure electric power is disconnected before
wiring the circulator.
The motor is designed for 60 Hz, 1phase, 115 or 230 volt power.
Wire shall be 14 to 16 gauge solid wire or 16 to 18 gauge
stranded wire.
To wire, loosen the screw from the terminal box cover and
remove the screw and cover.
Insert wires through supplied liquid-seal connector (installed)
or included ½" npt adaptor or other strain relief connector
(not provided).
Strip ³/af" of insulation from the ends of the three wires to
be connected.
To insert the wires into the terminal strip, flip the terminal lever
away from the wire opening and press down firmly. Insert the
stripped wire into the opening and release the lever. Tug on the
wire gently to ensure it is secured.
Connect the hot wire to terminal 'l', the neutral wire to terminal
'n', and the ground wire to terminal
f
.
Tighten the terminal box cover.
The motor is thermally protected so overload protection is not
necessary. All that is required is a fused plug or circuit breaker
in the power line. Electrical information can be found on the
nameplate of the motor.
3.0 check valve removal (optional)
Using a pair of needle-nose pliers, grip one of the flat wings of
the check valve and gently pull the valve out vertically.
f
plug
1
2
3

installation &
operating instructions
Astro 2
circulator models
6
4.0 start up
These circulators are maintenance free. Self-lubricated by the
system fluid, these circulators have no seals to leak or coupling
to break.
A proper installation practice recommends to thoroughly flush
the system clean of all foreign materials prior to installing
the circulator.
Fill the system before starting.
Speed setting of Astro 2 3-speed circulators:
(Not applicable for Astro 286)
The speed of these pumps can be adjusted with a 3-speed
rotary switch. On speed setting 1, the pump operates at
approximately half the performance of the speed setting 3
(maximum speed) and consumes about half the power of full
speed operation.
warning
Never operate the circulator dry as permanent damage may
occur. Never shut o the discharge or restrict suction flow
while the circulator is operating.
The venting of the rotor chamber may be done automatically.
However, to assure proper and faster venting of this circulator,
we recommend the manual venting procedure as follows
1Place a container under the back of the circulator to catch
any water that may run out.
2Be sure power to the circulator is o at the fuse or
circuit breaker.
3Loosen plug on the back of the motor but do not remove.
4Continue until water appears.
5After a sucient amount of water free of air bubbles has
passed, retighten the plug.
6The circulator can now be started.
liquid temperature minimum inlet pressure
150°f (65°c) 3.0 ft (0.91 m)
167°f (75°c) 4.4 ft (1.34 m)
194°f (90°c) 9.2 ft (2.8 m)
230°f (110°c) 36.1 ft (11.0 m)
fault possible cause remedy
Noise from radiator Excessive pressure passing the thermostatic valve. • Reduce the speed setting. Flow decreases will reduce
system pressure and eliminate the noise.
The radiator is not
giving o any heat
The thermostatic valve is jammed or blocked. • Shut o all other radiators in the system, and set the
pump at maximum speed.
• Once the blockage has been dislodged reopen the
radiators and adjust pump to original speed setting.
The heating system is not balanced. • Re-assess the system. Fit new commissioning valves
on all radiators (may be integrated in the thermostatic
valves) to enable an even distribution of the flow.
Pump generates
little or no output
Incorrect discharge direction. • Turn pump 180°
Dirty impeller • Open pump and clean impeller
note: Close isolation valves if present
Suction port blocked • Open pump and clean housing
note: Close isolation valves if present
Outlet blocked • Clean isolation valves
Isolation valve closed • Open isolation valves
Dirty strainer • Clean strainer
Air in the pump • Switch o pump and open bleed screw to vent.
Pump at lowest/medium speed level • Set pump to the next higher speed level.
Pump set point is too low • Increase set point on the pump or controller.
5.0 installation troubleshooting guide

installation &
operating instructions
Astro 2
circulator models
7
fault possible cause remedy
Pump stopped,
no power
Power supply interrupted • Check the power supply. Attach external power control
if necessary.
Fuse tripped or circuit breaker opened • Repair short-circuited wire. Repair loose contact.
• Check for the properly rated fuse.
• Check pump motor and lead.
Pump stopped, power
supply present
Thermal switch has actuated • Reduce ambient temperature.
• Clean blocked or slow rotating pumps.
Pump does not start • Open air vent screw and unlock shaft. Clean pump.
• Increase speed/set point.
• Replace pump.
Noises in system, ther-
mostatic valves/pipes
Pump output too high • Reduce speed level.
• Open bypass/valve.
• Install circuit balancing valves to adjust flow.
• Check pump selection/system. Adjust pump. Check
system /gauges.
• Replace pump.
Noisy pump Air in pump • Open bleed screw and vent pump. Vent and top up
system with water.
• Check expansion tank.
• Install air separator.
Cavitation sounds • Increase inlet pressure.
• Reduce temperature.
• Throttle back pump.
• Reduce speed.
Resonance noises • Use sound insulation material between the pump
and surface to reduce resonance noise. Install
expansion joints. Install fixture to change system’s
natural frequency.
• Adjusts pump speed.
• Replace pump/motor.
Knocking from foreign bodies in the
pump/or on valve
• Clean impeller.
• Adjust valve pressure. Adjust valve spring.
• Turn valve around if installed incorrectly.
• Replace pump.
6.0 spare parts
spare part item no. applicable models
Check valve 1"810223-104 Astro 220ssu, Astro 225ssu
Check valve 1¼" 810223-105 Astro 210, Astro 230, Astro 250, Astro 280, Astro 286
Check valve 1½" Astro 290

buffalo
toronto
manchester
bangalore
shanghai
armstrongfluidtechnology.com
#59, first floor, 3rd main
margosa road, malleswaram
bangalore, india
560 003
[phone]
wolverton street
manchester
united kingdom
m11 2et
[phone]
93 east avenue
north tonawanda, new york
u.s.a.
14120-6594
[phone]
23 bertrand avenue
toronto, ontario
canada
m1l 2p3
[phone]
no. 1619 hu hang road, xi du township
feng xian district, shanghai
p.r.c.
201401
[phone]
armstrong fluid technology
established 1934
birmingham
heywood wharf, mucklow hill
halesowen, west midlands
united kingdom
b62 8dj
[phone]
tm