Lighting and Operating Instructions

OPERATING INSTRUCTIONS

Before operating the heater, make sure that the system is filled with water.

Open the cold water inlet supply to the heater fully.

Open a hot water faucet to permit the water to fill the heater and the piping and to eliminate the air trapped in the system Close the hot water faucet after the water flows freely and all the air has escaped from the system. The water heater is now ready to operate.

FOR YOUR SAFETY READ BEFORE OPERATING YOUR HOT WATER HEATER

Warning: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

A.This appliance is equipped with electronic ignition for lighting the pilot and main burners. When turning the heater on, follow these instructions exactly.

B.Before operating the unit, set the On/Off switch to the On ( ) position. The On/Off switch is located behind the flip-down coverplate on the front panel strip. Smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

-Do not try to light any appliance.

-Do not touch any electric switch; do not use any phone in your building.

-Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

-If you cannot reach your gas supplier, call the fire department.

C.Use only your hand to push in the on/off control button. Never use tools. Follow these instructions exactly. If control button is jammed, close the gas supply and call a qualified service technician. Attempted forceful repair may result in a fire or explosion.

D.Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

1.STOP! Read the safety information on the front panel of the heater.

2.The gas valve must be turned off by putting the On/Off switch to position “ ” (see fig. 10). Wait five (5) minutes to clear out any gas. If you smell gas, STOP! Follow “B” in the safety information above. If you don’t smell gas, go to next step.

3.This water heater is equipped with a safety pilot burner and an automatic ignition control system.

4.Set the ON/OFF switch (flip down cover plate on front

panel strip) marked / to the “ ” position. In this position the water heater is ready to use.

5.Verify that the power supply to the appliance is turned on.

6.Turn the hot water faucet on to the minimum flow required to activate the heater. The automatic ignition system first ignites the safety pilot burner which then ignites the main burner in about 4 seconds. The power exhaust will then activate.

7.The pilot flame will extinguish 10-30 seconds after the burners come on. The burners will remain on until the hot water tap is turned off.

NOTE: On a first time installation, existence of air in the gas supply line and in the water line may cause some ignition delay. In that case, repeatedly open and close the hot water tap in order to restart the ignition process until all the air has been purged.

TO TURN OFF GAS TO APPLIANCE

Turn off the manual lever on the gas supply line to the heater and set the ON/OFF switch to the OFF ( ) position, see Fig. 10.

SETTING THE WATER TEMPERATURE

To operate the heater, set the ON/OFF switch to position “ ”. The switch is located behind the flip down cover plate on the front panel strip.

To shut down the gas to the heater, set the ON/OFF switch to position “ ”

Temperature Adjustment Knob

Decrease temperature	Increases temperature
and increase flow	and decreases flow
G661_004

Fig. 10 - Principles of Operation

The AquaStar 125FX LP and 125FX NG water heaters have a gas control that modulates burner input in response to flow. Its purpose is to ensure that the hot water temperature will remain steady, although the demand for water flow might vary (down to 1/2 gal/minute). To adjust the temperature on your AquaStar, turn on a hot water faucet to its maximum flow. At the AquaStar, turn the large knob located beneath the main gas controls on the front of the heater all the way to the right (clockwise). See Fig 11. This will produce a temperature rise of approximately 90°F at flow rates between

.5 and 2.0 gallons per minute. Given that average incoming water temperatures are 50°F, this heater will produce approximately 140°F water at these flow rates. Turning the dial all the way to the left (counterclockwise) will produce a temperature rise of approximately 45°F for flow rates between

1.0and 4.0 gallons per minute. This will result in a higher flow rate, but at cooler temperatures. Turning the dial to

locations in between will give various temperatures between

14	6 720 606 601

125FX NG, 125FX LP specifications

The AquaStar 125FX NG and 125FX LP are two remarkable models in the world of high-efficiency heaters. Designed for optimal performance in residential settings, these devices cater to diverse needs with their advanced technology and user-friendly features.

The AquaStar 125FX NG model operates using natural gas, while the 125FX LP utilizes liquid propane. This versatility allows users to choose the most suitable fuel type for their home setup. Both models boast an impressive energy efficiency rating, ensuring minimal energy waste while delivering reliable hot water on demand. This makes them not only cost-effective but also an eco-friendly choice for homeowners looking to reduce their carbon footprint.

One of the standout features of the AquaStar 125FX series is its compact design, which makes it ideal for installations in small spaces. With a sleek and modern appearance, it can easily blend into various interior aesthetics without occupying excessive room. The units are also relatively lightweight, facilitating a simple installation process.

In terms of performance, both the NG and LP models are equipped with a powerful BTU input that guarantees quick heating capabilities. They can provide ample hot water for multiple applications simultaneously, such as showers and dishwashing, making them perfect for busy households. Furthermore, the AquaStar 125FX units utilize advanced burner technology that ensures efficient combustion, resulting in a constant supply of hot water without fluctuations in temperature.

Safety is paramount in the design of the AquaStar 125FX series. Each heater is equipped with comprehensive safety features, including built-in vents for proper exhaust and a flame failure device that shuts the heater off if the flame goes out unexpectedly.

The control panel on both models is intuitive, allowing users to easily adjust the water temperature and monitor the unit's performance. Additionally, the AquaStar 125FX series is designed for longevity, with corrosion-resistant materials that withstand the rigors of daily use.

In summary, the AquaStar 125FX NG and 125FX LP are perfect examples of modern, efficient water heating technology. With their compact design, rapid heating capabilities, and robust safety features, these models present an excellent choice for any home looking to enhance its hot water supply while maintaining efficiency and environmental responsibility.