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CAUtIOn:

 To reduce the risk of electric shock, pull plug before 

servicing this pump.

WARnInG: 

Risk of electrical shock, this compressor has not 

been investigated for use in swimming pool areas. This pump is 

supplied with a grounded plug. To reduce the risk of electric shock: 

connect only to a properly grounded receptacle which is serviced 

by a Ground Fault Interrupter.
• Do not place pump where it 

might fall into water. 

• Do not place pump  

in direct sunshine.

• Do not place pump near 

flammable or other dangerous 

materials or objects.

• Use only to pump air.

• Place horizontally and make 

sure pump is above the height 

of the water surface to prevent 

water siphoning out of pond.

WARnInG

!

AttentIOn: 

Pour réduire le risque de choc électrique, 

débrancher la pompe avant de réparer cette pompe.

AVeRtISSeMent: 

Rish de choc électrique, cette pompe n’a 

pas été étudié pour une utilisation dans les piscines. Cette pompe 

est fournie avec une prise de terre. Pour réduire le risque de choc 

électrique: se connecter uniquement à une prise correctement mise à 

la terre qui est desservi par un disjoncteur de fuite à la terre.
• Ne pas placer la pompe où elle 

pourrait tomber dans l’eau.

• Ne pas placer la pompe

en plein soleil.

• Ne pas placer la pompe près de 

substances inflammables ou 

autres matières dangereuses ou 

des objets.

• Utiliser uniquement pour 

pompe à air.

• Placer horizontalement et 

s’assurer que la pompe est 

supérieure à la hauteur de la 

surface de l’eau pour empêcher 

l’eau de l’étang à siphonner.

IMPORTANT SAFETY INSTRUCTIONS

WARNING - To guard against injury, basic safety precautions should be observed, including the following:

READ AND FOLLOW ALL SAFETY INSTRUCTIONS

To avoid possible electric shock, special care should be taken since water is employed in the use of aquarium equipment. 
For each of the following situations, do not attempt repairs by yourself; return the appliance to an authorized service facility 
for service or discard the appliance:
1. If the appliance falls into the water, DON’T reach for it! 

First unplug it and then retrieve it. If electrical compo-
nents of the appliance get wet, unplug the appliance 
immediately.

2. Carefully examine the appliance after installation. It 

should not be plugged in if there is water on parts not 
intended to be wet.

3. Do not operate any appliance plug or receptacle getting 

wet, position aquarium stand and tank to one side of 
a wall-mounted receptacle to prevent water from drip-
ping onto the receptacle or plug. A “drip loop” should 
be arranged by the user for each cord connecting an 
aquarium appliance to a receptacle. The “drip loop” is 
that part of the cord below the level of the receptacle, 
or the connector if an extension cord is used, to prevent water traveling along the cord and coming in contact with the 
receptacle. If the plug or receptacle does get wet, DON’T unplug the cord. Disconnect the fuse or circuit breaker that 
supplies power to the appliance. Then, unplug and examine for presence of water in the receptacle.

c. Close supervision is necessary when any appliance is used by or near children.
d. To avoid injury, do not contact moving parts.
e. Always unplug an appliance from an outlet when not in use, before putting on or taking off parts, and before cleaning. 

never yank cord to pull plug from outlet. Grasp the plug and pull to disconnect.

f. Do not use an appliance for other than intended use. The use of attachments not recommended or sold by the appliance 

manufacturer may cause an unsafe condition.

g. Do not install or store the appliance where it will be exposed to the weather or to temperatures below freezing.
h. If an extension cord is necessary, a cord with a proper rating should be used. A cord rated for less ampreres or watts tan 

the appliance rating may overheat. Care should be taken to arrange the cord so that it will not be tripped over or pulled

SAVE THESE INSTRUCTIONS

GROUNDING INSTRUCTIONS

This appliance should be grounded to minimize the possibility of electric shock. This appliance is equipped with an electric 
cord having an equipment grounding conductor and a grounding type plug. The plug must be plugged into an outlet that 
is installed and grounded in accordance with all appropriate codes and ordinances.

The appliance is for use on a nominal 120-volt circuit, and has a grounding plug that looks like the plug illustrated in (A) 
above. A temporary adapter which looks like the adapter illustrated in (B) and (C) above may be used to connect this plug 
to a two-pole receptacle as shown in (B) if a grounded outlet is not available. The temporary adapter should be used only 
until a grounded outlet can be installed by a qualified electrician. The green-colored rigid ear( lug, and the like) extending 
from the adapter must be fastened to a permanent ground such as a grounded outlet box.
IMPORTANT: Airmax® Ecosystems, Inc. is not responsible for losses, injury or death resulting from a failure to follow these 
safety precautions, misuse or abuse of equipment.

TECHNICAL SPECS

MODEL

VOLTAGE

WATTAGE

MAX

AIR FLOW

MAX DIFFUSER 

DEPTH

ITEM #

LR25

120V / 60 Hz

50 Watts

2.5 CFM

Up to 6 Feet

120912

LR50

120V / 60 Hz

100 Watts

4.9 CFM

Up to 8 Feet

120913

INSTALLATION

Compressors should be installed 12 inches or more above the water level to ensure that water cannot flow from the airline/
diffuser back to the pump. Compressors may be used without protection although for longer life it is suggested that it be 
placed indoors or under a protective ventilated cover. Keep pump as dry as possible. If left outdoors place it on a hard 
surface that will stay dry during heavy rains.

MAINTENANCE & TROUBLESHOOTING

There are no parts that need lubrication. The integrated air filter requires periodic cleaning. To clean the filter media, remove 
the air filter cover. Extract the filter media from the compressor and rinse thoroughly with cold water. Before replacing, wait 
for the air filter to dry. Replace media into the empty filter cavity, replace the air filter cover and refasten. When the airflow 
decreases, it is time to replace the diaphragms. There are two diaphragms, one at either end of the compressor.
1. Disconnect the compressor from the AC receptacle.
2. Remove the cover lid.
3. Unscrew the diaphragm assembly from either end of the compressor.
4. Remove the diaphragm assembly.
5. Replace the diaphragm assembly and refasten.
6. Replace the cover lid.

3

2

SilentAir

 LR Series

Compressors for Shallow Water Aeration Systems

Installation & Maintenance Instructions

    Pond 

&

 Lake

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