Bosch AquaStar 125B LPS Скачать руководство пользователя страница 15

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To test the thermocouple, disconnect the thermocouple lead
to the ECO. Insert a multi-meter probe into the thermocouple
lead and attach or hold the other lead to the metal gas
valve (DC common). Light the pilot flame and hold button,
meter reading should be 24 mVDC or more. If the reading is
24 mVDC or more the thermocouple is good. To test the
electromagnet, re-connect the thermocouple lead to the
ECO, light pilot and hold button while taking a reading
between the ECO leads and the metal gas valve (DC
common). The reading should drop to 19 mVDC or less. If it
does not, 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 once the  pilot flame is on, that after a 15 to 20
second wait, the main burner button (        ) is pushed all 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.

4.

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, #34). 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 — 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 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”S” is part # 8707002393

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 13 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 BBTNA (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.

3. The heater’s fixed degree rise is too high for user

The calibration nut for the thermostat assembly at the gas
valve can be adjusted upward to lower the temperature rise.
A seal of paint coats two adjusting nuts there, the thin up-
per one is a lock nut while the lower one is the adjuster.
Loosen the lock nut one first.  Tighten the adjuster nut in-
crementally upward and check water temperature, stop when
satisfactory.  Then tighten down the lock nut. 

     Caution:

Never back the adjuster nut downward to the last thread
unless the thermostat is being replaced.  This is a gas

seal.

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

Содержание AquaStar 125B LPS

Страница 1: ... flammable combustible or corrosive vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department In...

Страница 2: ...off sensor Stainless steel burners with stabilized blue flame Built in corrosion resistant draft inducer Compact space saver mounts on a wall with two hooks Easily removable one piece cover Easy one person installation Adjustable water flow restrictor to ensure that water flow demand will not exceed the heating capacity of the heater Easy pilot flame lighting with push button piezo ignition BOSCH ...

Страница 3: ...INIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS FRONT VIEW SIDE VIEW AQUASTAR MODEL 125BS MODEL 125BS TOP A 12 FRONT B 4 BACK 0 SIDES 4 FLOOR C 12 VENT DIAMETER 5 ...

Страница 4: ... these instructions when you install your heater In the United States The installation must conform with local codes or in the absence of local codes the National Fuel Gas Code ANSI Z223 1 NFPA 54 In Canada The Installation should conform with CGA B149 1 2 INSTALLATION CODES and or local installation codes 2 Carefully plan where you install the heater Correct combustion air supply and flue pipe in...

Страница 5: ...r combustion ventilation and dilution of flue gasses Appliances located in confined spaces The confined space must be provided with two permanent openings one commencing within 12 inches of the top and one commencing within 12 inches of the bottom of the enclosure Each opening must have a minimum free area of one square inch per 1000 Btu hr if all air is taken from inside the building 2000 Btu hr ...

Страница 6: ...ttached across a pair of studs and then the heater should be attached to the support boards See Fig 1 Expansion and contraction of piping due to changing water temperature in the pipes imparts movement to the heater which if mounted directly to a brittle friable board such as plasterboard can cause failure of mounting In earthquake prone zones BBTNA recommends that installers use a large washer an...

Страница 7: ... than 45 degrees from the vertical is considered horizontal Horizontal sections must slope upwards at least inch for every foot of its horizontal length and be properly supported Keep the horizontal section short and avoid too many elbows The minimum vertical gas vent height allowed is 6 feet horizontal vent connectors and elbows are not to be considered in the total gas vent height All gas vent s...

Страница 8: ...ney Also an approved thimble or collar must be used when penetrating a masonry chimney A Existing INTERIOR Masonry Chimney The metal gas vent pipe should be permanently mounted inside the masonry chimney Double wall Type B gas vent is recommended The masonry chimney may have to be tile or metal lined before the insertion of the gas vent pipe check local codes for clarification The lining material ...

Страница 9: ...lly being used the vent pipe is therefore cold except for the short durations when hot water is being used it is therefore very important that the venting and air supply be adequate to provide a good positive draft as soon as the burners turn on See venting guide on back page The AquaStar 125B S instantaneous water heaters have built in draft diverters and are designed for indoor installation only...

Страница 10: ...l Fuel Gas Code NFPA 54 ANSI Z223 1 No Additional Allowance is necessary for an ordinary number of fittings GAS LINE SIZING Fig 4 Nominal Iron Pipe Internal Length of Black Iron Pipe Feet Size Diameter inches inches 10 20 30 40 50 60 70 80 90 100 125 150 175 200 1 4 0 364 32 22 18 15 14 12 11 11 10 9 8 8 7 6 3 8 0 493 72 49 40 34 30 27 25 23 22 21 18 17 15 14 1 2 0 622 132 92 73 63 56 50 46 43 40 ...

Страница 11: ...ines to facilitate servicing the heater see Fig 7 For installation on a private well system with the use of a pressure tank the lowest pressure range setting recommended is 30 50 psi 2 07 3 45 bar Fig 5 Installation of Gas Pressure Regulator The pressure regulator provided with the heater is adjusted to deliver the proper gas pressure as indicated on the rating plate and in the manual for altitude...

Страница 12: ...ont cover of heater 1 STOP Read the safety information above on this plate 2 The gas valve must be turned off by depressing the gas valve off button 3 Wait five 5 minutes to clear out any gas If you smell gas STOP Follow B in the safety information above on this plate If you don t smell gas go to the next step 4 The pilot burner is located behind the peephole in the front center of the jacket dire...

Страница 13: ... for a hot bath Handwashing should not be done in water hotter than 112 and cooler for older adults young children or persons with sensory loss Remember that scalding can occur in 20 seconds with 135 water MAINTENANCE AND SERVICE see maintenance table on back of manual Approximately once a year the AquaStar should be checked and cleaned To remove the front cover first remove the incandescent parti...

Страница 14: ...s 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 a gas service person to clean the pilot 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 ...

Страница 15: ...t 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 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 wat...

Страница 16: ...o be performed see 7 under BURNERS DO NOT IGNITE WHEN HOT WATER IS TURNED ON HOT WATER TEMPERATURE FLUCTUATES UNIT DEACTIVATED 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 hi...

Страница 17: ...ly 3 Burner manifold gas pressure test nipple 4 Main gas burner 5 Pilot gas tubing 6 Gas valve 7 Piezo igniter 8 Location of pressure tap screw 9 Water valve 10 Gas inlet gas pressure test nipple 5 1 4 7 9 3 10 6 2 8 Fig 10 Diagram of AquaStar 125 BS ...

Страница 18: ...18 6 720 606 518 AQ 125 BS Fig 11 INTERIOR COMPONENTS DIAGRAM AND PARTS LIST ...

Страница 19: ...lot Tube 8 710 707 166 15 Thermocouple 8 747 202 083 16 Burner assembly washer 8 710 103 060 17 Gas valve 8 707 011 467 LP Gas valve 8 707 011 469 NG 18 Gas supply pipe 8 700 705 464 19 Electromagnet 8 747 201 094 20 Electromagnet washer 8 700 103 144 21 Gas filter 8 700 507 051 22 Thermocable 8 747 202 078 23 Thermostat 8 707 206 039 24 O ring Thermostat 8 700 205 101 25 O ring Thermostat 8 700 2...

Страница 20: ...20 6 720 606 518 Fig 12 Flow chart of Aquastar 125 BS ...

Страница 21: ...will furnish a replacement part free of charge Shipping costs In addition to supplying the replacement part s BBTNA will provide ground service delivery for these parts Expedited or upgraded shipping will be charged to the customer Service labor costs This warranty does not cover any labor costs associated with service removal or re installation of part s All such costs must be borne by the Purcha...

Страница 22: ...22 6 720 606 518 ...

Страница 23: ...23 6 720 606 518 ...

Страница 24: ... Cacia 3801 856 Aveiro PORTUGAL 3 1 e g a p e e s E L B A T E C N A N E T N I A M R A E Y Y R E V E S R A E Y 2 Y R E V E S R A E Y 5 3 Y R E V E E V L A V R E T A W E T A C I R B U L E V L A V R E T A W D L I U B E R N E E R C S R E T L I F R E T A W T C E P S N I Y L B M E S S A T O L I P T C E P S N I Y L B M E S S A T N E V T C E P S N I R E N R U B N I A M T C E P S N I Recycled paper 2006 BB...

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