SsangYong Stavic / SsangYong Rodius (2005 year). Service manual — part 290
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
8
FFH & PTC
STAVIC - 2004.09
3B
Heater
Heating medium
Control of the heat flow
Heat flow
Fuel consumption per hour
Mean electric power consumption
Rated voltage
Operating range
• Lower voltage limit: An undervoltage protection
device in the controller switches the heaters off at
approx. 10 volt.
• Upper voltage limit: An overvoltage protection device
in the controller switches the heaters off at approx.
15 volt.
Tolerable operating pressure
Minimum water flow through the heater
Fuel
Tolerable ambient temperature
Weight
(with controller, water pump and fuel pump)
4. FFH SPECIFICATION
D 5 S-H
Coolant
100 W
12 W
12 V
10 V
15 V
up to 2.5 bar overpressure
300 L/H
In the main fuel tank
-40°C ~ 80°C
-40°C ~ 125°C (2h for 125°C)
approx. 2.7 kg
in operation
at start
after-running
operation
storage
Large (full load)
5000 W
0.63
35 W
Small (small load)
2300 W
0.28
11 W
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
9
FFH & PTC
STAVIC - 2004.09
3B
Above graph shows the FFH control process while the FFH is operating.
The control element is coolant as shown in the graph.
The FFH is operated in HI mode (high output: approx. 5000 W) until the coolant temperature reaches at 80°C and starts
to be operated in LO mode (low output: approx. 2300 W) from 81°C.
When the coolant temperature reaches at approx. 85°C, FFH stops its operation until the operating conditions will be
met again.
5. FFH OPERATING PROCESS
Operating Condition
FFH is operated according to the ambient temperature and coolant tempreature.
Initial and repeat operating conditions of FFH
Initial Operating Conditions of FFH:
Ambient temperature: below 5°C
Coolant temperature: below 75°C
Repeat Operating Conditions of FFH:
Coolant temperature: below 75°C
When the difference between the ambient temperature at initial operation and current ambient temperature is
over 3°C (to reduce the hysteresis with the temperature difference when operating FFH), FFH is operated
again. For example, if the initial operating temperature was 4°C, the ambient temperature at repeat operation
should be below 1°C and the coolant temperature should be below 75°C.
FFH operations according to the changes of coolant temperature
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
10
FFH & PTC
STAVIC - 2004.09
3B
Connecting the Coolant Circuit
The heater is connected to the coolant circuit in the coolant feed pipe from the vehicle engine to the heat exchanger.
Coolant Circulating Route
Water pump
Heating system
Blower fan
Heater module
Heater
Heater module
Engine
Fan
Rear
Front
[Notice]
•
Parts conveying coolant must be routed and fastened in such a way that they pose no temperature risk to person or
material sensitive to temperature from radiation and direct contact.
•
Before working on the coolant circuit, disconnect the negative battery cable and wait until all components have cooled
down completely.
•
When installing the heater and the water pump, note the direction of flow of the coolant circuit.
•
Fill the heater and water hoses with coolant before connecting to the coolant circuit.
•
When routing the coolant pipes, observe a sufficient clearance to hot vehicle parts.
•
Protect all coolant hoses/coolant pipes from chafing and from extreme temperatures.
•
Secure all hose connections with hose clips.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
11
FFH & PTC
STAVIC - 2004.09
3B
The FFH has various sensors in FFH unit, and the FFH unit is connected to the water pump, the fuel circulation pump
and the ambient temperature sensor (switch) that provides important signals for the initial and repeat operations.
For diagnosis, remove the FFH system connector and install the scan tool. Currently, the K-Line that is connected to
the diagnostic connector is not available.
Circuit Diagram
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