Specifications

Hydronic D4W SC Hydronic D5W SC Hydronic D5W S Hydronic B4W SC Hydronic B5W SC
Hydronic B5W S
8.4 cm3 / 90 seconds 9.5 cm3 / 90 seconds 8.6 cm3 / 90 seconds 11.3 cm3 / 90 seconds 11.9 cm3 / 90 seconds Max
7.3 cm3 / 90 seconds 8.5 cm3 / 90 seconds 7.6 cm3 / 90 seconds 10.1 cm3 / 90 seconds 10.7 cm3 / 90 seconds Min
Hydronic B4W SC
Hydronic B5W SC
Hydronic
B5W
S
11.3 cm3 / 90 seconds
11.9 cm3 / 90 seconds
10.1 cm3 / 90 seconds
10.7 cm3 / 90 seconds
6
Maintenance / Troubleshooting & Repair
18
REVISION LEVEL A - 12/09/13
FUEL QUANTITY TEST
The fuel Quantity should be tested if the heater has difculty starting or
maintaining a ame, using graduated cylinder part # 5520004 10ml.
Measure the fuel quantity when the battery is sufciently charged. At least 11V
and at most 13V should be applied at the control unit during measurement.
PREPARATION
• Remove metering pump cover in the cases of SC versions.
• Pull the fuel line off the combustion chamber and insert into a graduated
measuring glass.
• Switch the heater on, when fuel delivery is uniform (approximately 40
seconds after switching on), the fuel line is full and bled.
• Switch heater off.
• Empty measuring glass and replace.
MEASUREMENT
• Switch heater on.
• Fuel delivery starts automatically approximately 40 seconds after
switching on.
• Hold the graduated measuring glass at the glow pin height during
measurement.
• After 90 seconds of fuel delivery, it will shut off automatically.
• Switch heater off.
• Read off quantity of fuel delivery in the graduated measuring glass.
EVALUATION
If measured quantity of fuel is over or under the nominal value,
the metering pump must be replaced or fuel restriction eliminated.
Figure 12
DIESEL GASOLINE
PLEASE NOTE!