SsangYong Stavic / SsangYong Rodius (2005 year). 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