Operation8825−1/A1
Winterthur Gas & Diesel Ltd.
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2.1 Power Consumption Values
The table below gives an estimate for the power consumption values for the heating
cables installed on the engine:
Number of Cylinders
4 5 6 7 8
Power Consumption (W)
Worst Case T_Amb = 0_C
2100 2600 3100 3600 4100
Power Consumption (W)
Stable Operation Conditions
1200 1500 1800 2100 2400
A resistance insulation test must be done at regular intervals (a minimum of four each
year) for each electrical trace heating circuit. The results must be monitored and
recorded (see the Maintenance Manual 8825-1).
2.2 Usual Operation
When the engine operates with:
D Marine Diesel Oil (MDO): The heating cables must be set to off.
D Heavy Fuel Oil (HFO): It is recommended that the heating cables are set to on.
This keeps the HFO at the correct temperature.
When the engine has stopped after operation with:
D MDO − The heating cables must be set to off.
D HFO − The heating cables must be set to on.
2.3 Operation Modes
The electrical heating system can operate in Manual mode or automatic mode.
In the control box E88, you set the switch to the applicable position as follows:
D On
D Off
D Auto.
In Auto mode, the temperature measured on the fuel inlet pipe, sets the electrical
trace heating system to on or off.
If available, you can also use the MDO/HFO switch in the plant to set the electrical
heating system to on and off (MDO − open contact, HFO − closed contact).
2.4 MDO / HFO Supply Status (E88 to ECS)
The temperature element TE3411C (10) measures the fuel temperature in the fuel
inlet pipe (9) (see Fig. 2).
The control box E88 gives the status signal XS3411C HFO Supply to the engine
control system (ECS) in relation to the measured temperature if:
D The temperature is less than 60_C, then the contact is open (when the engine
operates with MDO)
D The temperature is equal to or more than 60_C, then the contact is closed (when
the engine operates with HFO).
The status is shown on the LDU-20 on the related page (see 4002-2, paragraph 3.10
User Parameters).
2015-03
Electrical Trace Heating System
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