AquaStar 125B NG Installations- und Betriebsanleitung - Seite 11

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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. Consult Controlled

Energy or a gas service person.

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 repeatedly on the piezo ignition

button until the pilot flame has ignited.

PILOT LIGHTS BUT FLAME GOES OUT WHEN

BUTTON IS RELEASED

1. Pilot push button was not pushed in far enough or

was not held in long enough

Once pilot flame has been lighted. Hold button pushed in

for at least 15 seconds to give time for the pilot flame to

properly heat the tip of the thermocouple.

2. Pilot flame improperly aimed or is too weak so it is

not properly heating the tip of the thermocouple.

The Pilot flame should be a sharp blue flame and aimed

at the tip of the thermocouple so that it envelops 10 mm

(3/8 ") of the thermocouple tip. Pilot flame has to be properly

aimed at the thermocouple. See Fig 9.

3. Poor

thermocouple

electromagnet

Note: Electromagnet is part #8707201012 located on the

right side of the gas valve behind the piezo push-button

assembly. Check the tightness of the thermocouple

connection nut at the electromagnet: The Electro-magnet

connection is a large aluminum 17mm hex head nut. The

thermocouple end is a 5 mm brass nut which screws into

the 17 mm nut. Tighten the thermocouple nut snugly but

not too tight.

4. Poor circuit connections at the ECO. (Energy Cut-

Off overheat protection)

Oxidation or looseness of the ECO terminal connections

can result in millivolt current loss through the thermocouple

safety circuit. Clean terminals with very fine sand paper or

an eraser and reconnect ECO leads.

5. Faulty ECO (part #8707206040)

If cleaning the terminals attached to the ECO did not fix

the problem, connect a jumper wire between the two wires

and try to relight the pilot. If the pilot flame now remains

on, replace the ECO. If the flame still goes out when the

button is released, the ECO is not defective. Go to next

step.

connection

the

6. Faulty thermocouple (part #8747202083) or

electromagnet ) Unless these 2 parts are at least 8

to 10 years old, it is very unlikely that they are faulty.

Before testing, reconfirm that #2 is absolutely

correct, and that all connections are clean and tight.

To test the thermocouple, disconnect the thermocouple

lead to the ECO. Insert a multi-meter probe on the

thermocouple ECO connection and attach the other meter

lead on the spade connector of the ECO. Light the pilot

flame, and take a reading on the meter. If it reads less

than 24mV, replace the thermocouple. If the reading is

24mV or over the thermocouple is good. To test the electro-

magnet, take another reading across the ECO spade while

the pilot flame is on. The reading should drop to about 15

mV. If it does not and remains unchanged, replace the

electromagnet.

BURNERS DO NOT IGNITE WHEN HOT WATER IS

TURNED ON

1. Pilot is not on.

Light the pilot. See lighting instructions.

2. Gas valve button not positioned on Burner Position

Be sure pilot flame is on. Slide gas valve control to burner

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: When the flow control is turned all the way clockwise,

the AquaStar models 125B require 1/2 gallon per minute

flow to activate the burners. This is a flow which would fill

a quart jar in 30 seconds. If the flow control knob is turned

fully counterclockwise, a flow rate of 1.1 gpm is required

to activate the burners.

5. Cold water inlet filter on heater is dirty.

Remove filter and clean. This screen filter is located at

the inlet side of the brass water valve (fig. 12, #28). 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

— i.e. 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.