2
Principle of Operation:
When a hot water faucet is opened, the flow of water through
the heater causes the gas valve to open. At the same time
a microswitch is activated which sends a spark to the pilot.
The flame sensor confirms that the pilot has been lighted
and allows the first two burners to ignite. The flame sensor
confirms correct activation and all burners ignite. The pilot
goes out. The power exhaust system runs as long as the
burners are on. The heat exchanger coils absorb the heat
generated by the burners and transfer heat to the water.
When the hot water faucet is shut off, the gas valve
automatically closes and the burners turn off, followed
immediately by the exhaust system. Your hot water faucet
is an ignition key to turn on the water heater, giving you
control over your hot water energy use. Every time you turn
off your hot water faucet, the energy consumption for hot
water returns to zero.
FEATURES
- Electronic Pilot Ignition
- On/Off switch to activate system
- Power Venting with safety shutoff
- High Quality Materials for Long Working Life.
- Copper heating coils for endless supply of hot water.
- Burner output proportional to hot water flow demand for
maximum energy efficiency.
- Safety flame sensor at pilot burner.
- Automatic overheating protection shut-off sensor.
- Stainless steel burners with stabilized blue flame.
- Built-in corrosion resistant power venter.
- Compact space saver: mounts on a wall with two hooks.
- Easily removable one-piece cover.
- Easy one person installation.
- Adjustable water flow restrictor to ensure that water flow
demand will not exceed the heating capacity of the heater.
AquaStar 125FX LP and 125FX NG Specifications
Water Connection 1/2 Thread fitting
H x W x D 29 3/4 x 18 1/4 x 8 3/4"
Vent 4 (Category III Gas Appliance)
Gas Connection 1/2 NPT thread
Min. Water Pressure 18 Psi
Max. Water Pressure 150 Psi
Shipping Weight 50.6 LB
Net Weight 44 LB
2.0 GPM at 90
°
rise
4.0 GPM at 45
°
rise
Min. Water Flow 1/2 gal/min
120V/60Hz 1.2 Amps
LP GAS Supply Pressure inlet. min. 11 W.C.*
max. 14 W.C.*
LP GAS Manifold pressure 9.9 W.C.**
Natural Gas Pressure inlet min.: 7 W.C.*
max.: 14 W.C.*
Natural Gas Manifold Pressure 5.38 W.C.**
* Inlet gas pressure must not exceed this value
** For purposes of input adjustment
UNPACKING THE AQUASTAR HEATER
This heater is packed securely. The box includes two water connection fittings, a control knob, a gas pressure regulator,
a pressure relief valve, an incandescent particle tray, two hooks for hanging the heater, this manual, a personal letter, a
warranty statement and a warranty registration card. Do not lose this manual as there is a charge for replacement.
Please complete and return the enclosed warranty registration card.
AQ125FXNG AQ125FXLPG
max.
130 000 Btu/hr 125 000 Btu/hr
min.
28 000 Btu/hr 28 000 Btu/hr
Gas input
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