AquaStar 125B NGS Посібник з монтажу та експлуатації - Сторінка 11

Переглянути онлайн або завантажити pdf Посібник з монтажу та експлуатації для Водонагрівач AquaStar 125B NGS. AquaStar 125B NGS 16 сторінок. Automatic instantaneous type water heaters for use with natural and liquefied petroleum gas

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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. Gas valve button not positioned on Burner Position

Be sure once the pilot flame is on, that after a 15 to 20

second wait, the main burner button (

the way in.

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 the heater.

Water flow rate at hot water tap is too low.

Note: The AquaStar models 125B"S" require 0.5 gallon

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 filter and clean. This screen filter is located at

the inlet side of the brass water valve (fig. 11, #35). 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 assem-

bly — 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 os 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 mois-

ture 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"S" is part # 8707002380

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

) is pushed all

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 #8 703 406 204).

WATER IS TOO HOT

1. Water flow rate is too low.

Increase the flow rate.

2. Not enough cold water mixing at faucet

Contact your plumber to adjust mixing valves on faucets.

WATER IS NOT HOT ENOUGH

1. Water flow rate is too high.

Decrease the flow rate.

2. 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.

3. Thermostat calibration is incorrect or thermostat

is defective.

Contact your service person or call CEC.

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