AquaStar 38B LP, 38B NG Burners do not Ignite When HOT Water is Turned on, Water is TOO HOT

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BURNERS DO NOT IGNITE WHEN HOT WATER IS TURNED ON

1. Pilot is not on.

Light the pilot. See lighting instructions.

2.Pilot lighting push button not turned to proper position

Be sure that once the pilot flame is on, that the gas valve button ( ) is slid all the way to the right to the ON position

( ).

3.Cold incoming water connection made to wrong side of heater

Make sure cold water inlet connection is on the right side of heater when you are facing heater.

4. Water flow rate at hot water tap is too low.

Note: The AquaStar models 38 B require 1/2gallon per minute flow to activate the burners. This is a flow which would fill a quart jar in 30 seconds.

5. Cold water inlet filter on heater is dirty.

Remove the filter and clean. This screen filter is located at the inlet side of the brass water valve (fig. 10, #25). Check and clean faucet aerators too.

6. Crossover in household plumbing

The AquaStar burner activates when there is sufficient water pressure drop in the AquaStar water valve assembly

—ie. when a hot water faucet is opened. If there is a crossover in the plumbing, the necessary pressure drop in the AquaStar will be insufficient, or totally eliminated. A plumbing crossover can be caused by a bad washer at a single lever faucet or incorrect plumbing or a mixing valve in the line, etc. which permits hot and cold water to mix in the plumbing. The crossover will create a back pressure in the system preventing the pressure drop in the Aquastar (i.e. cold water is entering the water heater from both sides and the burners will not come on). To confirm there is no crossover in the plumbing, shut off the cold water supply to the AquaStar. Open your hot water taps. There should not be any water flowing. If there is water flowing, there is a crossover in the plumbing. This is a plumbing problem, not an Aquastar problem. Please contact your plumber.

7.Water valve parts may be dirty or components damaged.

Water valve and component parts must be totally free of dirt. First check that the venturi is free of dirt particles. In hard water areas, mineral deposits can eventually (3 to 5 years in hard water areas) corrode the water valve parts to a point where they will need replacing. Any sign of moisture or corrosion at the joint of the water valve and the gas valve is a sign that the water valve assembly components need to be replaced immediately. Note: Water valve for model 38B is part# 8707002497 for both LP and NG models. (Contact service person to clean water valve or replace if corrosion is present).

PILOT LIGHT GOES OUT DURING OR IMMEDIATELY AFTER HOT WATER HAS BEEN USED

1. Gas pressure too low

Very low gas pressure may be caused by low delivered gas pressure, a jammed gas regulator or undersized gas lines. If the gas lines are undersized, there may still be the specified static gas line pressure. However when the water valve opens,and gas enters the burners, the pressure could drop sharply, causing the pilot flame to go out. Have a gas technician confirm the gas pressure both static and at maximum Btu output. Specifications for your heater are on page 2.

2. Pilot may be dirty or weak

See Page 9 for instructions on pilot maintenance.

3.Burners are not shutting down immediately when hot water is turned off

Note: If burners don’t shut down immediately when the hot water is turned off, the heater will overheat and the ECO will shut-off the gas. Rebuild the water valve assembly repair kit from CEC (part#8 703 406 204).

4.Water is too hot causing overheat sensor to shut heater down

Reduce burners by sliding gas control to single flame position.

WATER IS TOO HOT

1. Burners too forceful

Note: If the inlet water is quite warm, slide gas valve control to single flame symbol () and the heater will function on a minimum burner output.

2. Temperature selection is too hot

Turn the temperature adjustment knob to the left.

WATER IS NOT HOT ENOUGH

1.Temperature adjustment knob is set too low. Change the setting. Turn the temperature adjustment knob clockwise (to the right).

2.Water flow through the heater is higher than the capacity of the AquaStar to heat it

Reduce the flow demand at the faucet. See flow rates at specific temperature rises on page 2.

3.Btu input is too low due to insufficient gas pressure It is extremely important for a tankless instantaneous water heater to have the right size gas line to obtain the correct gas pressure

See specifications on page 2. Unlike storage tank water

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Contents What to do if YOU Smell GAS For Your SafetyTable of Contents Unpacking the Aquastar Heater FeaturesAquaStar 38B LP and 38B NG Specifications Open loop potable water and combination space heating system Could Freeze Proper Location for Installing Your HeaterGeneral Rules to Follow For Safe Operation Combustion AIR RequirementVenting Mounting InstallationClearances Above 4.500 ft consult your local gas supplier Maximum Inlet GAS Flow Pressure SettingWater Connections Altitude Natural Gas Liquid PropaneOperating Instructions For Your Safety Read Before Lighting the PilotTo Turn OFF GAS to Appliance Setting the Water TemperatureLighting Instructions Characteristic Pilot Flame Maintenance and ServicePilot Lights but Flame Goes OUT When Button is Released Trouble ShootingWater is not HOT Enough Burners do not Ignite When HOT Water is Turned onWater is TOO HOT Insufficient gas pressure HOT Water Temperature FluctuatesUnbalanced pressure in waterlines Diagram of AquaStar 38 B Interior Components Diagram and Parts List LPG Interior Components Diagram Parts List 38BControlled Energy Corp Installation Checklist

38B LP, 38B NG specifications

The AquaStar 38B LP and AquaStar 38B NG are cutting-edge water heating solutions designed for efficiency and performance, ideal for both residential and commercial applications. These models boast a sleek, compact design, making them suitable for installation in tight spaces while still delivering robust heating capabilities.

One of the key features of the AquaStar 38B LP and 38B NG is their advanced energy efficiency. With an impressive Energy Factor (EF) rating, these units utilize state-of-the-art heat exchange technology to maximize heat transfer and minimize energy consumption. This translates to reduced utility bills and a smaller carbon footprint, making them eco-friendly options in today’s sustainability-focused market.

The AquaStar models are available in two fuel types: LP (liquefied propane) and NG (natural gas). This dual-fuel flexibility allows users to select the ideal option based on availability and cost, ensuring optimal performance tailored to individual needs. The integration of high-quality burners further enhances the efficiency and reliability of these systems, ensuring quick recovery times and consistent hot water availability.

One notable characteristic of the AquaStar 38B units is their ability to provide continuous hot water. This makes them an excellent choice for households with high demand or commercial establishments like restaurants and hotels, where hot water is required throughout the day.

Moreover, the AquaStar 38B models are equipped with innovative safety features to enhance user protection. The built-in temperature control mechanism allows users to set their preferred water temperature, while also incorporating anti-scald technology to prevent overheating.

In terms of maintenance, the AquaStar 38B units stand out with their user-friendly design. Routine maintenance is straightforward, and the models feature easily accessible components for servicing, which contributes to their longevity and reliability.

In conclusion, the AquaStar 38B LP and 38B NG represent a fusion of efficiency, safety, and advanced technology. With their energy-saving capabilities, versatile fuel options, and robust design, these water heaters are a worthwhile investment for anyone seeking reliable and efficient hot water solutions.
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