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ウォーターヒーター AquaStar 125B NGのPDF 据付・取扱説明書をオンラインで閲覧またはダウンロードできます。AquaStar 125B NG 16 ページ。 Automatic instantaneous type water heaters
AquaStar 125B NG にも：据付・取扱説明書 (17 ページ)

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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 125B is part# 8707002499 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

using the repair kit from CEC (part #8 703 406 178).

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 high (as with solar

preheated water)

Note: Only the Model "S" AquaStar should be used if the

inlet water is preheated.

3. Reduce inlet gas pressure

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 page 13 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 "MAIN BURNERS WILL NOT

IGNITE..." paragraph #6). 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.

6. Parts in water flow valve are corroded so that the

gas passage is not fully opening.

Contact your service person or Controlled Energy.

HOT WATER TEMPERATURE FLUCTUATES

1. Unbalanced pressure in waterlines

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 or shower heads are free of minerals. Do not

add any flow restrictor to the shower head.

2. Cold water is mixing with the hot water between

the AquaStar and the outlet

See #6 under "Burners do Not Ignite When Hot Water

Turned On".

3. Inlet water pressure is erratic due to inadequate

supply water pressure or saturated pressure tank

on well system

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

minimum pressure setting to 30 psi. Confirm that the

pressure tank is not water logged.

4. Gas pressure is too low

See page 2 for correct specifications.