AquaStar 125FX NG, 125FX LP specifications GAS Connections, GAS Line Sizing

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GAS CONNECTIONS

NOTE: The AquaStar 125FX is supplied with a gas pressure regulator that must be installed on the heater before attaching the gas supply line. See figure 6. Failure to install the gas regulator as shown in figure 6 will be a violation of CSA certification of the unit. The regulator supplied with the heater is preset for the gas shown on the rating plate to the correct pressure. It is an appliance level regulator designed for (low inlet) pressure (less than 1/2 Psig or 15” W.C.) DO NOT connect to an unregulated or high pressure propane line or to a high pressure commercial natural gas line.

GAS INLET PIPE

PRESSURE TAP

PLASTIC CAP

APPLIANCE PRESSURE REGULATOR

(with directional arrow on reverse side pointing upward)

Fig. 6 - Appliance pressure regulator

(with directional arrow on reverse side pointing up)

GAS LINE SIZING

The pressure regulator provided with the heater is adjusted to deliver the proper gas pressure (as indicated on the rating plate and in the manual for altitude up to 2000 feet (660 meters) above sea level. On appliances being installed above 2000 ft (660 meters) elevation, the inlet gas pressure should be set at installation to the value shown below.

NOTE: The gas pressures specified below refer to pressures taken at the pressure tap on the gas inlet pipe just above the regulator (See Fig 6). These readings should be taken while the heater is operating at full input

—i.e. maximum water flow with the temperature dial selector turned all the way clockwise.

MAXIMUM INLET GAS FLOW PRESSURE SETTING

Altitude

Natural Gas

Liquid Propane

 

inches W.C:

inches W.C:

0' - 2.000 ft

5.7"

10.5"

2.000 ft - 4.500 ft

4.6"

8.4"

Above 4.500 ft consult your local gas provider.

GAS LINE SIZING

-It is strongly recommended that the Natural Gas pipe be Black Iron pipe the entire distance from the outside meter to the inlet of the Aquastar regulator. 1/2” Black Iron pipe up to 10 feet, 3/4” Black Iron pipe up to 40 feet and 1” Black Iron pipe up to 125 feet distances. Flex line tubing is NOT recommended, but if used then oversize it.

-It is strongly recommended that the LP Gas pipe be semi-rigid copper or Black Iron pipe from the outside regulator to the inlet of the Aquastar regulator. For semi- rigid copper piping: 5/8” up to 20 feet and 3/4” up to 50 feet distances. For Black Iron piping: 1/2 “ up to 30 feet and 3/4” up to 150 feet distances. Flex line tubing is NOT recommended, but if used then oversize it.

THESE FIGURES ARE FOR AQUASTAR SUPPLY ONLY, ALL OTHER APPLIANCES IN THE BUILDING WILL NEED TO BE INCLUDED IN THE PIPE SIZING.

National Fuel Gas Code requires that a sediment trap (drip leg) be installed on gas appliances not so equipped. The drip leg must be accessible and not subject to freezing conditions. Install in accordance with the recommendations of the serving gas supplier.

WARNING: The heater must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of .5 psig.

The water heater must be isolated from the gas supply piping system by closing the manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or greater than .5 psig.

The water heater, including the pressure regulator provided with it, must not be operated at gas supply pressures in excess of .5 psig. If overpressure has occurred, such as through improper testing of the gas lines or malfunction of the supply system, the gas valve and regulator must be checked for safe operation.

When your connections are made, check for gas leaks at all joints (not just the ones you made). Apply some soapy water to all gas fittings and gas valve. Soap bubbles are a sign of a leak.

NOTE: Do not apply soap solution to pilot filter screen or pilot orifice area. If you have a leak, shut off the gas. After verifying that required gaskets are in place, tighten appropriate fittings to stop leak. Turn the gas on and check again with a soapy solution. Never test for gas leaks using a match or flame.

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Contents Table of Contents For Your SafetyWhat to do if YOU Smell GAS Features Unpacking the Aquastar HeaterFront View Side View TOP a Front B Back Sides Floor C Vent DiameterProper Location for Installing Your Heater General Rules to Follow For Safe OperationCombustion AIR Requirements ClearancesMounting Installation Incandescent Particle Tray IllustrationVenting Feet 4.6 m with twoHorizontal Side Wall Soffit GAS Connections GAS Line SizingGAS Line Sizing For Natural GAS GAS PIPING, ConnectionsFor LP GAS Water valve and water connectors, top view Water ConnectionsFlue gas safety device Electrical ConnectionsFor Your Safety Read Before Operating Your HOT Water Heater Lighting and Operating InstructionsTemperature Adjustment Knob Microswitch adjustment No Spark AT the PilotPilot Sparks Continuously with no Water Running FAN Circulates When HOT Water is Shut OFF Diagram of AquaStar 125FX Interior Components Diagram and Parts List Interior Components Diagram Parts List 125FX Flow chart of Aquastar 125 FX Limited Warranty Maintenance Table see page15

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.
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