AquaStar NG Pilot does not Light, No gas to the Aquastar Gas cock on gas line may not be open

AIR SCREEN

PILOT ORIFICE

Fig. 8 - Pilot burner with air screen/ pilot orifice

Main Burner Flames: The main burner flames should be blue, with a more intense blue cone in the center core. Yellow flames could be a sign of wrong size gas orifices or dirty burners, or a blockage on the heat exchangers fins. If some burners have yellow flames while others have good flames, it is likely that dust, lint or spider webs have partially clogged the burner venturis. To clean the burners contact a gas service person.

Mineral Scale Build-up: The AquaStars heater, when operated at lower temperature settings, do not accumulate mineral build-up. If however, the heater is used at the higher temperature settings and the water has a high mineral content, periodic descaling may be necessary. The heating coils should be flushed with a descaling solution. Consult your service person.

TROUBLE SHOOTING (see maintenance table on back)

Introduction

The AquaStar 38 burners are ignited by a water flow valve. Numerous water related problems can cause this water valve to malfunction such as: Insufficient water flow volume to activate the burners at its minimum flow requirement; Dirt in the water flow valve causing it to malfunction; Sediment build-up in faucet aerators, or shower heads; Uneven pressures between cold and hot. (with single lever faucets) Plumbing cross overs. These water flow related problems can cause the heater to deliver less than its full output, or to fail to ignite or to shut down completely.

Problems are stated in upper case, bold face. Most common causes for the problems follow in order of likelihood. The suggested solutions require that the cover be taken off. To this, remove incandescent particle tray, pull off the temperature adjustment knob and unscrew and remove the plastic collar and unscrew the central screw located at the bottom of the front cover. Pull main cover out toward you and lift up and out.

PILOT DOES NOT LIGHT

1. No gas to the Aquastar

A. Gas cock on gas line may not be open.

B. Gas valve button has not been moved to “PILOT POSITION”. Slide button to right to single flame position

( ).

2.In-line Aquastar gas regulator jammed (usually on LP gas)

Replace or unlock the regulator. Note: The regulator furnished with the heater is designed for low gas pressure. Excessive pressure will lock it up (propane only). Locking usually happens if the gas pressure between the gas tank (propane) and the water heater’s gas regulator has not been reduced. See page 2 for recommended correct gas pressure and check with gas service person.

To unlock a regulator, consult your gas supplier.

3. Pilot orifice clogged and/or air screen dirty

Clogging of the pilot burner can be caused by dust and any suspended matter contained in the ambient air. Although the filters can lengthen the cleaning intervals, they can never completely prevent such clogging. In consequence the gas jet issuing from the pilot orifice is reduced and or the air mixture is reduced. The pilot flame is weak and thus can no longer heat the thermocouple sufficiently. For cleaning purposes, the air filter screen is pulled off, washed and blown out. The pilot orifice has likewise to be cleaned or exchanged. See page 12.

4. Air in the Gas Line

Note: Normally this is a problem only at the time of initial installation, after the pipes have been worked on, or after a propane tank has been allowed to empty, or after the heater has been shut down for a long time.

Bleed all the air trapped in the gas line. Because of the very small pilot orifice (especially on LP gas models), bleeding out all the air could take several minutes. Slide the gas

valve button ( ) to pilot position ( ) and depress this button until all the air has escaped, and the gas has arrived. During this process, press on the piezo ignition button separately until the pilot flame has ignited.

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