Download  Print this page

Pilot Light, But Burners Will Not Come On; Main Burners Go Out During Hot Water Use - Bosch Aquastar GWH 1600 H N User Manual

Hydro-generated ignition suitable for heating potable water only not approved for space heating or preheated water applications
Hide thumbs

Advertisement

Troubleshooting
• 5. Confirm wire connection to the pilot electro valve
is secure. See Components Diagram for location.
Inspect terminals for corrosion. To clean terminals,
remove the spade connectors and clean with a pencil
eraser
• 6. Open a hot water faucet. While sparking, hold a
flame from a lit match or lighter in the pilot area. If the
pilot successfully lights, the pilot orifice may be dirty
or clogged. See chapter 5.3 on how to clean the pilot
• 7. Verify adequate voltage at the spade connection of
the pilot electro valve. When sparking, voltage
should read 1.6VAC. If voltage is proper, pilot electro
valve is defective. If voltage is not proper, electronic
control box is defective.
Visit
www.boschhotwater.com
replacement part, or call Bosch Water Heating at
800-642-3111 for replacement part if still under
warranty.
6.4
Pilot light, but burners will not
come on.
• 1. Verify gas type indicated in the rating sticker
located on the cover's right hand side, coincides with
the gas type you are using. NG is a natural gas unit
and LP is for liquid propane (See chapter 2.2).
• 2. Pilot flame should be blue in color and completely
engulfing the flame sensor. If not, the pilot orifice may
be dirty or clogged. See chapter 5.3 on how to clean
the pilot.
• 3. Flame sensor not recognizing pilot flame. Verify
wire connection clip on wire from the bottom of the
flame sensor is secure. If flame sensor is fully
engulfed by the pilot flame, it may be dirty. Clean
entire surface area of flame sensor with a pencil
eraser.
• 4. Inspect the water path for obstructions. Make sure
all outlets (i.e. showerheads, faucet aerators and
whole house filters) are clear of debris. Inspect and
clean the water heater's inlet filter screen. See
chapter 5.2.
• 5. Confirm wire connection to the burner electro
valve is secure (see components diagram for location
of burner electro valve). Inspect terminals for
corrosion. To clean terminals, remove the spade
connectors and clean with a pencil eraser.
• 6. The water valve assembly, which allows gas flow
to the burners, requires periodic maintenance (every
2-5 years depending on water quality and use). Visit
www.boschhotwater.com to purchase water valve
rebuild kit to service the water valve
• 7.Electric control box, burner electro valve or flame
sensor maybe damaged/defective. Verify adequate
voltage at the spade connection of the burner electro
valve (see components diagram for location of burner
electro valve). After the pilot lights, voltage should
20
read 1.6VAC on the burner electro valve. If voltage
is proper, the burner electro valve is defective. If
voltage is not proper, electronic control box or the
flame sensor is damaged/defective.
Visit
replacement part, or call Bosch Water Heating at
800-642-3111 for replacement part if still under
warranty.
to
purchase
Fig. 25 Electrical wiring diagram
2
3
23
25
27
28
31
32
34
50
51
110
111
6.5
• 1. Hot water flow rate is dropping below required
activation flow rate. Turn temperature adjustment
knob all the way clockwise. Fully open a hot water
faucet and fill a quart container. If the container fills in
30 seconds or less, the flow rate (1/2 gallon per
minute) is sufficient to activate the water heater. If
flow rate is not sufficient, the water heater's inlet filter
should be inspected and cleaned. See chapter 5.2.
• 2. Close installer supplied cold water shut off valve (if
none installed, install before proceeding). Open all
hot water taps supplied by the heater. Wait 5
minutes and check all taps. Any water running is a
sign of a plumbing crossover. Consult local plumber
or service person for help correcting a plumbing
crossover.
• 3. The minimum water pressure for the home should
be 30psi or greater. For installation on a private well
system with use of a pressure tank, the lowest
pressure range setting recommended is 30-50 psi
(2.07-3.45 bar).
www.boschhotwater.com
Pilot electrode
Flame sensor
Electronic control box
Burner electro valve
Gas control valve
Pilot electro valve
Temperature limiter
Flue gas safety device
LED indicator main burner operation
Hydro-generator
On/Off switch
LED failure control box
Overheat limiter
Main burners go out during hot
water use
to
purchase
6 720 608 032

Hide quick links:

Advertisement

loading

  Related Manuals for Bosch Aquastar GWH 1600 H N