AquaStar 125X NG Manuel d'installation et d'utilisation - Page 12

Parcourez en ligne ou téléchargez le pdf Manuel d'installation et d'utilisation pour {nom_de_la_catégorie} AquaStar 125X NG. AquaStar 125X NG 16 pages. Automatic instantaneous type water heaters for use with natural and liquefied petroleum gas

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PILOT SPARKS CONTINUOUSLY WITH NO WATER

RUNNING

1. Microswitch needs adjustment

If no water is running, but pilot electrode continuously

sparks, the microswitch screw to the water valve needs

adjustment. See Figure 12.

PILOT LIGHTS BUT BURNERS WILL NOT COME ON

1. Confirm water valve assembly is working properly.

2. Confirm the flame sensor is in its proper position.

3. Confirm the burner electrovalve switch is

functioning properly.

Call CEC

4. The electrical Control Box (Fig. 13) may need to be

replaced.

Call CEC.

Fig. 13 - Electrical wiring diagram

electronic control box

pilot electrovalve

pilot electrode

flame sensor

microswitch assembly

on/off switch

MAIN BURNERS GO OUT DURING HOT WATER USE

1. Flow rate diminished below activation rate

2. Unbalanced pressure in the water lines

The added restriction caused by the AquaStar in the hot

water system can result in uneven pressures between the

cold and the hot. In such cases when mixing cold water at

the tap, the lower hot water pressure may be overpowered

by a much higher cold water pressure, which may cause

the AquaStar burners to shut down. Make sure faucet

aerators and showerheads are free of minerals and dirt.

Do not add any flow restrictor to the shower head.

114

gas control valve

115

burner electrovalve

116

battery compartment

1.5V D batteries (2)

119

overheat sensor

3. ECO (overheat sensor) tripped due to overheating

4. Minimum inlet pressure on well is inadequate

Check the inlet water pressure. On a private well, raise

the minimum pressure setting to 30 psi. Confirm that the

pressure tank is not water logged.

WATER IS TOO HOT

1. Temperature Selection too high

Turn the temperature adjustment knob counter-clockwise

(to the left) to lower the maximum water temperature.

Note: This will increase the activation flow rate.

2. Inlet water temperature is too hot (as with solar

preheated water or high ground water

temperatures)

Decrease gas pressure. Note: Only the Model "S"

AquaStar should be used if the inlet water is preheated.

WATER IS NOT HOT ENOUGH

1. Temperature selection too low.

Change the setting. Turn the temperature adjustment knob

clockwise (to the right).

Note: This will decrease the activation flow rate.

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

heaters, the burners of a tankless water heater must be

very powerful to heat water instantaneously since they do

this only at the time hot water is actually being used. It is

therefore imperative that the gas pressure requirement

be met exactly. Insufficient gas pressure will directly affect

the water temperature at the time of usage. See page 2

for correct gas pressure settings and fig. 14 for locations

where gas pressures are taken.

4. Btu input is too low due to insufficient gas supply

Make sure your main gas line is fully opened. If using LP

gas, be sure that the size of the propane tank is adequate

to supply the required gas pressure.

5. Cold water is mixing with the hot water between

the AquaStar and the outlet

Compare water temperature at outlet of the AquaStar (hold

the AquaStar's outlet pipe with your hand) and at the tap.

If these two are very different, check for mixing valve or

plumbing crossover (see "NO SPARK AT THE PILOT"

paragraph #4). Where automatic "anti-scald" valves are

required by code, lower the temperature setting on the

AquaStar as much as possible and balance the pressure

between cold and hot water after the AquaStar.