Hydronic 10 (Water Heater) - Parts Manuals

25
Fuel Quantity Test
The fuel Quantity should be tested if the heater has difficulty
starting or maintaining a flame.
Note:
Preparation
Measure the fuel quantity when the battery is
sufficiently charged. At least 11V/22V and at
most 13V/26V should be applied at the control
unit during measurement.
• Pull the fuel line from the heater and insert into a
graduated measuring glass (size:50cm 3 )
• Switch the heater on, when fuel delivery is uniform
(approximately 63 seconds after switching on), the fuel
line is full and bled.
• Switch the heater off and empty the measuring glass.
Measurement
• Switch heater on
• Fuel delivery stars automatically approximately 63
seconds after switching on
• After 105 seconds of fuel delivery, it will shut off
a u t o m a t i c a l l y
• Wait for restart.
• Fuel pump is automatically switched off
after another 75 seconds.
• Switch off the heater.
• Measure the fuel in the measuring glass
Evaluation
Nominal value: 19 ml± 10%
If the quantity is less than the tolerance, replace the fuel
metering pump
Repair Steps
Disassembly / Assembly
1 Control unit
2 Glow pin cable
3 Glow pin
4 Overheat sensor / temperature sensor
5 Cover Blower
6 Flame sensor/heat exchanger fastening screws
7 Housing including heat exchanger, dismantled
8 Burner
9 Burner dismantled
10 Heat exchanger
11 Heat exchanger dismantled
1 Control unit (on installation of control unit, grease the
gasket with sealing paste
2 Glow pin cable