Truma DuoComfort User manual

Operating instructions Page 2
To be kept in the vehicle!
DuoComfort

2
DuoComfort
Table of Contents
Intended use ...................................................................................... 2
Safety instructions ......................................................................... 3
Operating instructions
Control and display panels ................................................................ 4
Start-up .............................................................................................. 4
Changeover ....................................................................................... 4
Removal status .................................................................................. 5
Changing cylinders ............................................................................ 5
Hose change ..................................................................................... 6
Using only one gas cylinder .............................................................. 6
Checking for leaks in the high-pressure section ............................... 6
Accessories ..................................................................................... 7
Technical data ................................................................................. 7
Symbols used
The unit may only be
installed and repaired by
an expert.
Symbol indicates possible
hazards.
Note containing infor-
mation and tips.
Intended use
Truma DuoComfort is an auto-
matic changeover valve for a
two-cylinder system. It permits
replacement of gas cylinders
without interrupting the gas
supply.

3
The DuoComfort must be op-
erated in conjunction with a
downstream, wall-mounted gas
pressure regulation system, e.g.
MonoControl CS or GOK Type
EN61-DS (inlet connection with
male thread M20 x 1.5). Using
other gas pressure regulation
systems is prohibited.
The DuoComfort changeover
valve can be used in commercial
vehicles (e.g. in accordance with
DGUV regulation 79 – previously
BGV D 34).
Using the DuoComfort in closed
rooms (e.g. at home), on boats
or in EX Zone 0 (e.g. tankers) is
prohibited.
The national regulations must
be observed if there is a possi-
bility of it being used in mobile
homes. In Germany, its use in
mobile homes is prohibited.
Safety instructions
– The use of upright gas cylin-
ders from which gas is taken
in the gas phase is manda-
tory for operation of the
changeover valve, gas equip-
ment and gas systems. Gas
cylinders from which gas is
taken in the liquid phase (e.g.
for fork lifts) must not be used,
since they would result in
damage to the gas system.
– Two high-pressure hoses are
needed for connecting to the
gas cylinders. Truma provides
the necessary high-pressure
hoses with the most common-
ly-used connection variants for
European gas cylinders (see
Page67– 68).
– High-pressure hoses with
hose rupture protection (HRP)
on the inlet side are manda-
tory for “operating the gas
system while driving”. See the
notes in the relevant operating
instructions for the down-
stream gas pressure regu-
lation system.
– Pressure regulation devices
and hoses must be replaced
with new ones no more than
10years after their date of
manufacture (every 8 years if
used commercially). The oper-
ator is responsible for this.
– To avoid disturbances in the
gas system during winter
operation, the DuoComfort
changeover valve may be
equipped with Truma's
“EisEx” regulator heating
(part. no. 53101-01).

4
Control and display panels
DuoComfort
min.
50 cm
a
d
d
b
c
Figure 1 – MonoControl CS
example
a = control knob for the oper-
ating / reserve cylinder
b = status display – operating /
reserve cylinder (green / red)
c = green reset button – crash
sensor triggering element
d = green button – hose rupture
protection
Truma offers a remote in-
dicator as an accessory
(partno. 50210-01) to permit
reading of the operating cylin-
der's status from inside the
vehicle.
Start-up
– For example, turn control knob
(a) to the left until it stops
(left connection is operating
cylinder.
– Connect gas cylinders and
make sure all hose connec-
tions are in good condition.
– Open the valves on both gas
cylinders.
– Firmly press the hose rupture
protection (d – green button)
for about 5 seconds. The dis-
play in the mica window (b)
turns green.
Operating instructions – Put the gas pressure regu-
lation system into operation
(see the relevant operating
instructions).
Changeover
As soon as the pressure in the
operating cylinder falls below
0.5 bar, the valve automatically
switches over and begins taking
gas from the second gas cylin-
der. The display in the mica win-
dow turns red.
In extreme cold or when a
large amount of gas is con-
sumed from the cylinder over a
long period of time, the gas pres-
sure may fall below 0.5bar even
though there is still some gas left
in the cylinder. This may result in
gas being taken from both gas
cylinders simultaneously.

5
If necessary, use the control knob
(a) to manually select which cyl-
inder will be operating and which
will be held in reserve.
Always turn control knob (a) as far
to the left or right as it will go (an
intermediate position will cause
gas to be removed from both
gas cylinders simultaneously).
Removal status
In the normal position (operating
cylinder on the left, reserve cyl-
inder on the right), the following
display will be seen:
– Status display (b) is green =
gas taken from the left cylin-
der (operating cylinder).
– Status display (b) is red = gas
taken from the right cylinder
(reserve cylinder).
Changing cylinders
Residual gas: No smok-
ing, no naked flames!
DuoComfort offers the possibility
of changing empty gas cylinders
without interrupting operation
of the consumers. Non-return
valves integrated into the inlet
connections prevent gas from
escaping when only one gas
cylinder is attached for a short
time (see “Using only one gas
cylinder”).
– Rotate the control knob (a) by
180° or half a turn to the stop
position, and the previous
reserve cylinder becomes the
operating cylinder. After the
cylinder change the full gas
cylinder is available again as
the reserve cylinder.
The status display (b) changes
to green.
– Close the empty cylinder's
valve and screw off the high
pressure hose.
– Screw the high-pressure hose
onto the full gas cylinder and
open the cylinder valve. If
necessary firmly press the
hose rupture protection (d) for
about 5 seconds.
The status display (b) remains
on green.
After any intervention,
check the hose connection
on the cylinder valve for leaks
(see “Checking for leaks in the
high-pressure section”).

6
Hose change
Residual gas: No smok-
ing, no naked flames!
We recommend the Truma screw
aid (Part no. 50020-61500) for
screwing the hoses on and off.
It will help you generate the
necessary tightening torque and
will prevent damage to the screw
fittings, which may otherwise re-
sult from using an improper tool.
– Close the gas cylinder valve.
– Remove the high pressure
hose from the gas cylinder (or
from the slip-on adapter) and
from the inlet to DuoComfort.
– Screw the country-specific
high-pressure hose onto the
DuoComfort inlet and onto the
cylinder (or onto the slip-on
adapter).
– Open the gas cylinder valve.
– If necessary firmly press the
hose rupture protection (d) for
about 5seconds.
– Put the gas pressure regu-
lation system into operation
(see the relevant operating
instructions).
When changing the hose,
ensure that the seal pro-
vided with the hose (hose outlet –
changeover valve inlet) is correct-
ly installed and is not damaged.
We recommend that the
seal (part no. 50020-
76300) be replaced every time
the hose is changed.
After any intervention, check the
hose connection on the cylinder
valve and at the DuoComfort inlet
for leaks (see “Checking for leaks
in the high-pressure section”).
Using only one gas cylinder
You can also use DuoComfort
with only one gas cylinder.
Non-return valves integrated into
the inlet connection prevent gas
from escaping through the un-
used connection.
– The free inlet must be sealed
off using the provided blind
cover (brass) if only one cylin-
der is being used.
– Turn the control knob (a) to-
wards the operating cylinder.
Checking for leaks in the
high-pressure section
A trained technician must
check the medium and low pres-
sure sections for leaks. In ad-
dition, we recommend that the
person responsible for operating
the gas system checks the high

7
pressure section every time a
cylinder or hose is replaced.
In particular, the screw fittings
on the gas cylinder valve and on
the changeover valve should be
checked for leaks with the proper
tools, such as a leak-finder spray
according to DIN EN 14291.
Accessories
High-pressure hoses
(with hose rupture protection)
see Page 67 – 68
1.5-metre connection hose
for connecting external
gas cylinders (G.5;
part no. 50020-61300)
Replacement seals
for high-pressure hoses
(G.13 and M20 x 1,5;
part no. 50020-76300)
EisEx regulator heating
(part no. 53101-01)
Remote indicator
(including EisEx)
shows the removal status from
inside the vehicle.
(part no. 50211-01)
Elbow union 90 °
(part no. 50020-56000)
Additional kit
required when gas cylinders are
more than 100 cm apart
(part no. 50020-61100)
Gas remote switch
for shutting off the gas supply
from the vehicle interior
GS 8 (part no. 57014-01)
GS 10 (part no. 57024-01)
Screw aid
(part no. 50020-61500)
Gas filter
suitable for all wall-mounted
changeover valves with a
M20x1.5 inlet screw joint (male
thread – G.13). Install upstream
of the changeover valve.
(part no. 50600-01)
Technical data
determined in accordance with
EN 16129:2013 and Truma test
conditions
Type of gas
Liquid gas (propane / butane)
Admission pressure
0.95 – 16 bar
Output pressure
0.3 – 0.9 bar
Nominal changeover
pressure (pdi)
750 mbar
Valve inlet
Male thread M20 x 1.5 (G.13)

8
Valve outlet
Union nut M20 x 1.5 (H.20)
Recommended tightening torque
3 – 5 Nm for union nut
M20 x 1.5 (G.13, H.20)
Operating temperature
-20 °C to +50 °C
Product ID number
CE-0085BQ0102
DG approval number: 3894
Subject to technical changes.

9
Hochdruckschlauch / High pressure hose / Lyre haute pression
Verwendung nach Ländern / Use in countries / Utilisation selon les pays
G.1
50410-04
50420-04 •••
G.2
50410-03
50420-03
o•ooo
•oo
G.7
50410-02
50420-02
•
propane • butane
G.8
50410-06
50420-06 ••••
o•
butane •• • propane
G.10
50410-05
50420-05
G.12
50410-01
50420-01 ••o•
•= Gängigster Anschluss / Most common connection / Raccordement le plus courant
o= Ebenfalls erhältliche Anschlüsse / Also available connections / Raccordements également disponibles
x= für Gasflaschen mit Clip-on Adapter / for gas cylinders with clip-on adapter / pour bouteilles de gaz avec
adaptateur à clipser
Art-Nr. / part no. / N° d’art.: 50410-xx (450 mm)
50420-xx (750 mm)

10
Hochdruckschlauch / High pressure hose / Lyre haute pression
Verwendung nach Ländern / Use in countries / Utilisation selon les pays
TR YU
G.1
50410-04
50420-04 ••
G.2
50410-03
50420-03
oo ooooo
G.7
50410-02
50420-02
G.8
50410-06
50420-06
o•x••••
G.10
50410-05
50420-05 • •••
G.12
50410-01
50420-01
o•
•= Gängigster Anschluss / Most common connection / Raccordement le plus courant
o= Ebenfalls erhältliche Anschlüsse / Also available connections / Raccordements également disponibles
x= für Gasflaschen mit Clip-on Adapter / for gas cylinders with clip-on adapter / pour bouteilles de gaz avec
adaptateur à clipser
Art-Nr. / part no. / N° d’art.: 50410-xx (450 mm)
50420-xx (750 mm)

Truma Gerätetechnik GmbH & Co. KG
Wernher-von-Braun-Straße 12
85640 Putzbrunn
Deutschland
Service
Telefon [phone]
Telefax [phone]
[email protected]
www.truma.com
Las instrucciones de uso y de montaje en su idio-
ma pueden solicitarse al fabricante Truma o al
Servicio postventa Truma en su país.
Saat käyttö- ja asennusohjeen pyynnöstä omalla
kielelläsi valmistajalta (Truma) tai maasi
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στη χώρα σας.
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vyžádat u výrobce Truma nebo servisu Truma ve
vaší zemi.
Návod na použitie a montáž vo Vašom štátnom
jazyku si môžete vyžiadať u výrobcu Truma alebo
vservise Truma vo Vašej krajine.
Instrukcję obsługi i montażu we właściwej wersji
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02 490-85 / 50020-56300 · 10 · 08/2016 · ©