Page 1
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Air
heaters D 7 L
Technical Description
Installation Instructions
Eberspacher
J.
Eberspiicner
Eberspiicherstr.
D-7300
Telefon (zentral)
(0711)
3109-0
Telefax
3109-500
(0711)
24
Esslingen
Page 2
Contents Page
Optional control elements
Control
Scope of
Installation instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
elements.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
delivery / Cat. No. . . . . . . . . . . . . . . . . . . . . . . . . .
..
..
..
Approval, official regulations,
general
..............................................
Typical installations/
installation location.
Installing the heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Principaldimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..
..
..
Permissible installations
positions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running the heating air
Running the combustion air
.............................
...........................
Running the exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuelsupply . . . . .
Electrics/wiring diagrams
.. .. .. ..
. .
.. ..
. . . . . . . . . .
......................
.. . .. ..
..
8,9
..
10,11,12
12,13,14
Operating instructions are supplied with control elements.
2
3
4
4
5
Heating timer with
fasteners
Cat. No.
12 V 25 1482 89 19 00
24 V
251483890200
6
6
6
7
7
Timer
Cat. No.
12 V 25 1482 89 25
24 V
251483891000
00
Fasteners
(only required for installation with screen)
Cat. No.
2514827001
00
Cat.
switch
No.
Universal
251380890400
Bulb
12 V 207 00 005
24 V 207 00 006
Room thermostat
Cat. No.
black 25 1557 80
01
00
brown 25 1557 80 07 00
2
Page 3
Scope
of
supply
w
K
Item
10
11
12
13
C)
14 Temperature
15
._._.-.--
__
~~-.r'-
Qty.
2
3
4
5
6
8
9
1
1
1
1
1
1
1 Impulse transmitter
1
1
1 Socket connection casing,
Designation
Basic heater
12
V 25
148001
24 V 25 1481
Identification plate with
Name plate V
Thermal cutout automatic fuse
Solenoid valve for combustion air A
Fuel
metering pump
Control unit B
Main fuse
Universal switch
6 poles
Cable harness
(accessory)
Bulb for universal switch
16
not available
01
alone W
cat.
no.
A
limiting device
+Batterie
..
_._.-·-=>-Batterie
K
E
Cold air
Warm air
Combustion air
Exhaust
Fuel
supply
3
Page 4
Installation Instructions
The Eberspacher D 7 L heaters are diesel or fuel oil operated fresh-air heating and ventilating units for universal
installation. They can
be
operated independently of the
vehicle's engine.
Area of application: large vehicles (freight space of trucks,
passenger areas of buses).
See page 6 for installation
registered
in
West-Germany.
The suggestions put forward
in
passenger areas of vehicles
in
these installation instructions are only examples. Possibilities other than those illustrated
tion, means of running
they meet the requirements
fic regulations
(e.g.
with regard to the choice of installation loca-
air)
are also permissible, provided
of
the West German road traf-
(StVZO),
and if necessary after consultation
with the manufacturer.
Approval, official regulations, general
1.
For
vehicles registered
road traffic regulations
ved by the Federal Motor Vehicle
official test symbol
plate). .
name
The year of first operation
in
West Germany (subject to the
StVZO),
the heaters are appro-
Office and receive
(D
7 L 'VV"V.S
is
124)
indicated
a requirement of German
on
an
the
approval not representing a model number.
2.lf the heater
is
installed
in
special-purpose vehicles
(e.g.
vehicles transporting dangerous cargoes), the regulations applicable to such vehicles must be observed.
3.
The heater must not
be
operated
in
closed rooms,
e.g.
garages.
The heater must always
tank
is
to
be
filled.
4.
The heaters must
by the manufacturer and
be
switched off when the petrol
be
installed by a workshop approved
in
compliance with the installa-
tion instructions.
5.
The heaters may only
by the manufacturer and
be
used for the purpose specified
in
compliance with the operating instructions supplied with every heater.
Operating the heater
mable vapours or dust can build up
is
not permitted where inflam-
(e.g.
near fuel, coal
or sawdust stores, grain silos etc.).
6.
The proposed installations
tions are only examples.
in
the installation instruc-
Other installation locations are
also permissible, provided they comply with the general
installation requirements the manufacturer should
consulted
if
necessary.
In
all other respects, differences
be
from the installation instructions, particularly with regard
to wiring (wiring diagrams), fuel supply, combustion air
and exhaust ducts, and use of operating and control
elements not supplied by the manufacturer, are only
permissible with the written approval of the manufacturer.
Failing that, the manufacturer's warranty
is
null and
void for the entire heater system, as is the general operating permit.
7.
Every combustion process generates exhaust gas,
which has toxic constituents. Because of this and the
high temperatures generated, the exhaust duct must
comply without fail with the installation instructions.
Failure to comply with the instructions or operation of
the heater
in
closed rooms (garages) harbours the risk
of poisoning.
8.
When the heater or the heating system
authorized workshop must
mage
in
an expert manner and using genuine spare
be
called
is
damaged, an
in
to repair the da-
parts.
Makeshift repairs (on one's own initiative) or the use of
non-genuine spare parts are dangerous, and therefore
not permitted. When carried out
the general design approval
in
cars, they invalidate
of
the heater and conse-
quently the general permit of the vehicle.
9.
The warranty conditions are set forth
let given to
when the heater
you by the after-sales service workshop
is
installed.
in
the heater book-
Only our warranty conditions shall apply.
4
Page 5
/
T'y
"
plcal installat"
Ion I Reci rculation heat" mg
-8US-
il_
j
)
1 Heater
~
Fuel .metering pum
Heating-air inlet p
~w
Farm
air outlet
tank
uel
7 Exhaust '
8
C pipe
ombustion air '
9
Universal switCh
PIPe
('j
T'
"
~Plcal
(site
installatio "
officetraiter)n m a room with box
1 Heater
~
Fuel ,metering pum
Heating air
~
~arm
xhaust pipe
Comb
8
9 ustlon air '
Fuel conne t' pipe
10 Bo
11
B x ventilation
ox seal
13 U '
n1versal
14 R
oom thermostat
inlet p
air outlet
'
,c
Ion
switch
5
Page 6
Installing the heater
Permissible installation positions:
Installation should as a rule be
illustrated.
consult
A heater
both axes out of this position by up to
non-level positions of the vehicle while it
and
starting
of up to
Heating
Installation
For installation
in
West Germany, the following applies:
Since fuel, exhaust and combustion air lines
areas may not have any
must be installed
area and with
the outside must
Heaters must not
areas of buses
sengers).
If
different arrangements are necessary, please
the manufacturer.
installed
still operate. Furthermore, continuous operation after
is
possible at deviations from the normal position
in
the normal position can be tilted by
± 30°, provided these positions are not long-term.
is
impossible at more than 30° deviation.
in
passenger areas:
in
passenger areas of vehicles registered
in
a box sealed off from the passenger
ventilation from the outside. Openings to
be
proof against splash water.
be
installed
(vehicles with seats for more than 8 pas-
in
the normal position
±
15°,
as a result of
is
being driven,
in
loose connections, the heater
in
the driver and passenger
as
passenger
If
the bus has nowhere but the interior to install a heater,
then the bodywork must
located
sible using a box integral to the bodywork, ventilated from
the outside and airtight to the inside,
then placed.
The factory plate must be clearly visible with the heater
place.
xed, with the same information as the
on the heater which
a cover
necessary if the
without the aid of tools.
Electrical
in
is
heater components, protection against spray water);
plugs should
on
the outside and not the inside. This
If
necessary, a second plate (duplicate) can be affi-
placed
the vehicle
not affected (sufficient clearance from hot vehicle and
in
front of the heater. A second plate
original
wiring, switches and controls must
in
such a manner that their proper operation
face downward.
be
modified so that the heater
is
also fea-
in
which the heater
original, to a place
is
clearly visible after installation, or to
is
is
visible after removal of a cover
be
arranged
is
in
un-
all
is
( )
~/
Principal dimensions
~---323
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6
Page 7
Running the combustion air Piping
I
i Combustion air
i \
Solenoid valve
The combustion air must be sucked
(not from the passenger compartment
flexible tubing mounted to the heater without shortening
or extending this tubing but leaving it unchanged.
When the heater is
adequately ventilated to the outside. The opening (approx.
2
25
cm
to the outside must be located in such a
)
it is protected against spraywater and dirt
provided with an elbow tube.
Running the exhaust Piping
installed in a box, the latter
in
from the outside
or
trunk) using the
must
way
or
it
must
Exhaust
be
that
be
..
In
running the exhaust lines, care should be taken that:
1.
Exhaust gases cannot be expected to enter the vehicle
or be sucked in through the vehicle or heater blower.
2.
The outlet of the exhaust pipe must extend to the outside and must be run in such a manner that
clogged by dirt
enter can
Should a further extension of the exhaust line be necessary, a
steel tube
40 mm (approx.1
at the joining end (approx.
exhaust pipe
connection and it should be laid with a slight downward
slope or have approx. 5
lowest points.
The exhaust
the air stream formed by the vehicle's travel. The exhaust connection on the heater may not be shortened,
but it
may
the same.
and
flow out.
must
outlet
be bent,
snow
and that any water that does
42
x 1
mm
with an internal diameter of
5/8
in.)
which is opened out to
13/4
in.)
should be used. The
be securely attached to the exhaust
mm
(0.2
in.)
drain holes at the
must
be to the outside but not facing
so
long as the total length remains
it
cannot be
42
mm
()
3.
Penetrations to the outside of the vehicle should be made tight against spray-water with a grommet.
4.
Parts of the vehicle important for its operation must not
have their function disturbed (maintain adequate
ance).
• Exhaust
----------------~~
7
clear-
Page 8
Running
the
heating air
Locate the
the exhaust gases from the
heater
In
fresh air heating (drawing the heating air from outside),
the fresh air
possible and not
area subjected to wind pressure or vacuum. When operating as a
ting air
sucked
A heater provides the greatest heating air flow when it
blows freely. Components which carry heating air reduce
the
flow of heating air.
1.
Installation without temperature limiting device
inlet for the heating air
itself cannot contaminate the heating air.
should be drawn
in
the vicinity of the exhaust pipe or
recirculating heater, locate the inlet for the hea-
in
such a way that the out-flowing hot air cannot be
directly
in
again.
in
such a manner that
vehicle's engine and from the
in
from as high a position as
in
an
In
order to enable you to determine whether the installation method you intend to employ excessively reduces
the
flow of heating air - the limit is reached when the hea-
ter overheats - we have
ry
heater model and a component rating for every compo-
nent through which heating air
Equipment Catalog).
The component rating sum of the components attached to
the heater through which heating air flows may not exceed the heater rating.
outflow temperature
The
measured after
from the heater) when parts are used that have not been
given a component factor. The temperature may not exceed
140°C.
completion of installation (300 mm down
stipulated a heater rating for eve-
flows (See Additional
in
the hot air line must only be
.I
7
Item
Item
2
3
4
5
7
Total of component factors
Designation
D 7 L heater
Designation
2 connections
Flexible tube 100 mm ¢
(40
1 m
4 m
2 x
Outflow grid 100 mm ¢
in)
(160
in)
90° bends of flexible tubing 100
(4
m.
in)
run
(4
in)
mm ¢ (4
Cat.
No.
25 1226 89
10 2114
in)
251226890500
8
00
11
380000
Heater factor
8
Component factor
0,2
1,0
4,0
1,0
1,8
8,0
0
Page 9
2. Installation with temperature limiting device
C-)
Item
Item
2
3
4
5
7
8
Total of components factors
Designation
D 7 L heater
Designation Cat. No.
2 Connections 25
Flexible tube 100 mm ¢
1 m (40
3 m
2 x 90° bends of flexible tubing 100
Outflow grid 100 mm ¢
Outflow tube 100 mm ¢
with temperature limiting device
(120
in)
in)
(4
(4
m.
in)
in)
run
(4
in)
mm ¢ (4
in)
12268900
102114
25
1226890500
25
1431
11
38 00 00
8901
00
Heater factor
8
Component factor
0,2
1,0
3,0
1,0
1,8
0,7
7,7
(~~
\ /
9
Page 10
Fuel
supply
Divergences
1.
Fuel is
preferably
connection)
Sketch 1
1
2.
In
the
event
diesel-engined
for
from
as
of
heaters
the
instructions
tapped
shown
difficulties
in
vehicles
of
more
than 5 kW
set
from
the
Sketch
and
1.
in
fitting
petrol-engined
forth
vehicle
the
riser
(as a
here
fuel
pipe,
vehicles
rule
trucks.
are
not
permitted.
tank
or
from a separate
the
supply
with a mechanical
construction
as
they
fuel
line
can
be
machinery
can
lead
tank
Fuel
connection
tapped
fuel
pump
etc.)
to
malfunctions.
with
separate
as
shown
.
riser
to
heater
in
Sketch 2 in
pipe
(tank
the
case
of
.....
S_ke_t_c_h_2
___
rl-II-,i~
!:I·
I I •
1
I
: I 4
c:
Dimension a = max.
max.
Dimension b =
Dimension c = max.
Dimension d = max.
max.
~!-,IZI.I!_
,I-
.
.f4f'1======::]
•
'.u
~
~
r injection
fii~i}C
~riV~~
750
mm
with
petrol
2000
mm
with
diesel
50
mm
300
mm
4 m
with
petrol
6 m
with
diesel
To
Gmechanical
engine
pump
or
1 Fuel
2
3
4 Fuel
5 Fuel metering
6
7 Fuel pipe, plastic, internal dia. 2
8 Riser pipe (tank connection),
9 Fuel pipe, internal dia. 4
Fuel connection
---.--
fuel
pump
6.
to
heater
0
7
tank
(vehicle
Fuel branch
Fuel hose, internal dia. 5
Cat. No.
(only necessary
Cat. No.
Fuel hose, internal dia.
Cat. No.
Cat. No.
Cat. No.
Cat. No.
360
pre-filter
25
360
090
25
049
08016001
75
1226
pump
75
31117
1156
10
tank
350
when
contaminated
89
00
(150 to
300
300000
030
steel
copper
or
separate tank)
mm
37
vertically
3.5
mm
mm
internal dia. 4
mm
C)
fuel is used)
upwards)
mm
10
Page 11
3.
Permissible suction and pressure heads for installations
as per
1.
and
2.;
permissible positioning of metering
pump.
Max.
fuel level
Fuel
connection to heater
e
Supply pressure from tank to metering pump:
e = max. 1000 mm
Suction head:
with tank at zero pressure:
f=
max. 750 mm with diesel oil
Metering pump
_._.1-
Min. fuel level
4.
Important
Sections 45 and 46 of the West German road traffic regulations also apply, with due alteration of details, for the fuel
lines
and additional tanks of heaters.
Protect
ting; do not install near
fuel line, filter and metering pump from overhea-
silencers and exhaust pipes.
Check whether tank ventilation
Intake
from tank when underpressure occurs during
operation
f=
Pressure head, metering pump to heater:
g = max.
Fuel line, metering pump to heater, should not have a
slope if at all possible.
When laying fuel line, fuel filter and fuel metering pump
near the rear
latter.
For
tubing, never
(valve 0.03 bars
max. 400 mm with diesel oil
2000 mm
axle, allow for the spring deflection of the
connection of the fuel branches, always use rubber
plastic pipe.
is
working properly
in
tank cap):
Cut
fuel tubes and pipes to length only with a sharp knife.
Cuts may not be indented, any must be burr-free.
Right
Wrong
Connect up
flush.
11
fuel pipes with a fuel tube.
C!ip Tube
with screw
Heat and bend
Fit
the fuel pipe
plastic pipe
Page 12
Fuel grades
Fuel
of
D 7 L at low temperatures
The heater can take without problem the fuel you use
your tank and which is commercially available.
diesel fuel
mitted.
The refineries
winter temperatures (winter diesel).
Difficulties can therefore only arise at extremely low temperature (as
manual).
If
the heater
rules must be observed: at temperatures above 0 °C, any
type of diesel fuel can be used.
If
there
tures, mix
Electrics:
Arrange electric cables, switch and control units
vehicle
cannot be impaired under
tions.
no.
1 and
no.
2.
Admixture of used oil
automatically adapt their fuels to normal
in
the engine - see the vehicle's instruction
is
fuelled from a separate tank, the following
is
no special diesel fuel available at low tempera-
in
petroleum or petrol according to the table.
in
such a way that their correct functioning
normal operating condi-
Control unit
Permissible
installation angles
In
the USA
is
not per-
in
in
the
Temperature Winter
diesel fuel
o °C to - 15 °C**
-
15°C
to - 25 °C
-
25°C
to - 40 °C
* or special winter diesel fuels.
**
or
in
accordance with fuel manufacturer's specifications.
The fuel line and the fuel pump must be
fuel by operation for 15 minutes.
Fuel for special cases
In
special cases, the heaters can also be operated with
extralight fuel oil (above
please consult the manufacturer.
Fit
the control unit so that
(from both its own vehicle and preceding ones). Outside
is
installation
ged
in
ward.
thus not permissible. The unit
the vehicle interior, with the plugs pointing down-
Non-permissible
100%
50%
0 0c) or petroleum.
it
is
protected from splash water
Control unit
installation angles
Additive
50 % Petroleum or
petrol
100
% Petroleum*
filled with new
If
in
doubt,
is
best arran-
Electric installation
The required cross-sectional areas of the + lines and
- lines must be determined from the
If
the dimensions of the line are too small then there is a
danger that the heater will be switched off
after starting due to undervoltage.
Total length
in
meters
(+ and - cable
lengths added)
up to 5
5-8
8 - 14
20
14 -
- 28
20
In
general use
up to 7
7 -
11
11
-18
18-28
in
DIN
section
in
10
16
25
America
(5.2)
(8.4)
(13.4)
(21.5)
cross-
mm
4
6
following table.
automatically
2
Cable
No.
general use
in
America)
10
8
6
4
(in
Example
Line length (plus)
Line length (minus)
Example
Line length (plus)
Line length (minus)
12
1:
2:
heater - battery
heater - battery
overall length
resulting line
cross-section
heater - battery
heater - chassis
overall length
resulting line
cross-section
=4m
=4m
=8m
=6mm
=4m
=1m
=5m
=4
mm
2
2
Page 13
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bl
2,5'
sw
.-_.
__
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__
._-
2.1
Control unit
2.2
Fuel
metering pump
2.2.1
Fuel
circulation pump
12~1
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Total
L.c._.-:J
1.1
Blower motor
2.3 Air
solenoid valve
1.2
Glow-spark plug
2.4
Impulse transmitter
1.3
Ignition spark generator
2.7
Maine fuse
16
A
1.4
Temperature switch
2.7.2
Motor fuse
20 A
1.5
Safety thermal cutout switch
No.
204 00 87
1.5.1
Automatic thermal cutout fuse 0.4 A
2.8.9 Connection
L
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