Truma Combi eco, Combi eco plus, Combi comfort, Combi comfort plus Operating Instructions Manual
*
Truma Combi®
LP Gas Furnace with Supplementary Indirect Water Heating
Operating instructions
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death or
property damage.
Do not store or use gasoline or other
flammable vapors and liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Evacuate all persons from the vehicle.
• Shut off the gas supply at the gas container or source.
• Do not touch any electrical switch, or use
any phone or radio in the vehicle.
• Do not start the vehicle’s engine or electric
generator.
• Contact the nearest gas supplier or certified service technician for repairs.
• If you cannot reach a gas supplier or certified service technician, contact the nearest
fire department.
• Do not turn on the gas supply until gas
leaks have been repaired.
To be kept in the vehicle.
This document is part of the furnace.
Conforms to ANSI Std. Z21.47
Certified to CSA Std. 2.3
4010007
* Patent
Pending
Installation and service must be performed by
a qualified installer, service agency, or the gas
supplier.
Table of Contents
Trademark information ........................................................ 2
Intended use .......................................................................... 2
Prohibited use ........................................................................ 2
Mounting arrangement / Accessories ................................ 3
Furnace diagram .................................................................... 4
California Proposition 65 lists chemical sub-
stances known to the state to cause cancer,
birth defects, death, serious illness or other reproductive harm. This product may contain such
substances, be their origin from fuel combustion (gas) or components of the product itself.
Consumer Safety Information
Safety symbols and signal words ...................................... 6
Safety behavior and practices ............................................. 6
Safety features ...................................................................... 8
Operating Instructions
How the Combi furnace works ........................................... 8
Selectable modes of operation ................................................. 9
Selectable modes of power input ............................................. 9
Switch for gas shut-off valve .............................................. 9
Room temperature sensor ................................................. 10
Truma pressure relief/drain valve ..................................... 10
Opening the Truma pressure relief/drain valve ....................... 10
Closing the Truma pressure relief/drain valve ........................ 10
Starting the Combi furnace ............................................... 11
Inspections before each use .................................................. 11
Filling the water container ...................................................... 11
Switching on the furnace ....................................................... 12
Shutdown ............................................................................. 12
Switching off the furnace ....................................................... 12
Draining the water container .................................................. 13
Winterizing ........................................................................... 13
Optional: Winterizing the RV with a winterizing fluid ............. 13
Winter operation ................................................................. 13
Combi Technical Data ........................................................ 14
“ Combi” MANUFACTURER’S LIMITED WARRANTY .... 15
Maintenance and service ................................................... 16
Decalcifying and cleaning the water container ...................... 16
Truma pressure relief/drain valve ........................................... 17
Replacing the 12-volt fuse ...................................................... 17
Troubleshooting .................................................................. 18
Appendix ............................................................................... 19
Trademark information
Truma Combi® referred to as Combi below.
Intended use
The Combi LP gas furnace* with supplementary indirect water heating may be used only in
recreational vehicles (RVs) for heating the room
and the faucet water.
Recreational vehicles (RVs) are designed as
temporary living quarters for recreation, travel
and/or camping. RVs have their own power or
are towed by another vehicle.
*Models
• Combi eco
• Combi eco plus
• Combi comfort
• Combi comfort plus
The Combi eco plus and Combi comfort plus
furnaces also feature electrical heating elements
for a supply voltage of 120 V.
Prohibited use
Any use other than the intended use (see above)
is prohibited.
Examples of prohibited use:
• Use in a marine environment.
• Use as part of a space heating system.
• Use in mobile homes.
• Use in food trucks or roadside food vending
vehicles.
• Use in construction trailers.
2
Mounting arrangement / Accessories
This is a typical installation for illustration. The installation in your vehicle may vary.
The illustration is not to scale.
B
C
I
Fig. 1
H
7
0
D
A
G
F
K
J
E
Legend
A Combi furnace
B CPplus control panel
C Room temperature sensor
D Opening for circulated air intake
(with mounted grid (optional))
E Truma pressure relief/drain valve
F Wall cowl with exhaust venting system
(tube in tube)
G Warm air ducts with insulation sleeve
H Warm air end outlet with air throttle
I Wall outlet vent
J Non-return valve (optional)
K Truma water pressure regulator (optional)
3
Furnace diagram
14
12
1 (top)
4
32
5
18
6
Fig. 2
17
16
15
10
7
8
13
5
19
20b
4
20a
11
1 (top)
10
9
Fig. 3
4
3
11
2
6
7
10
18
6
7
9
19
9
8
Key
1 Combi furnace with supplementary indi-
rect water heating
2 Connection for combustion air supply
tube
3 Connection for exhaust tube
4 Switch for gas shut-off valve
5 Connection cover
6 Warm air outlets (upper)
7 Warm air outlets (lower)
8 3-pole 120 volt electrical plug
(only on Combi eco plus and
Combi comfort plus models)
9 Plastic frame feet
10 Aluminum frame feet
11 Circulated air fan
12 Fan for combustion air
13 Cold water connection (inlet)
14 Hot water connection (outlet)
15 Gas shut-off valve (behind the cover)
16 Gas connection (inlet)
17 Test connection (gas) (behind the cover)
18 Electronics housing cover
19 Recessed grips
20a Original type plate
20b Duplicate type plate
5
Consumer Safety Information
Safety symbols and signal words
This is the safety alert symbol. This symbol
alerts you to potential hazards that can kill or
hurt you and others.
• Keep the area around the Combi furnace free
from combustible materials, gasoline, and
other flammable vapors or liquids such as
pressurized dispensers or wax candles.
• Keep the area in front of the warm air outlets
(Fig.1 – H) free of combustible or heat-sensitive materials. Do not put any material into
the warm air outlets.
indicates a hazardous situation
which, if not avoided, will result in death or
serious injury.
indicates a hazardous situation
which, if not avoided, could result in death or
serious injury.
indicates a hazardous situation
which, if not avoided, could result in minor or
moderate injury.
is used to address practices not
related to physical injury.
Other important information or tips
Safety behavior and practices
Ensuring a safe operating environment
• Danger of suffocation! To ensure dis-
sipation of exhaust gases, operate the
Combi furnace outdoors only.
– Never use in enclosed spaces or tents or
breathe in the exhaust gases.
– If installing an airtight awning, make sure
that the exhaust system terminates to the
outdoors.
– If the RV is parked in an enclosed space:
– Block the flow of fuel to the Combi
furnace.
– Deactivate the time switch.
– Switch off the Combi furnace at the con-
trol panel.
– Ensure that the Combi furnace cannot be
switched on through the Truma App un-
der any circumstances.
• Use the Combi furnace only with a functional LP gas and carbon monoxide detector
installed in the RV. For installation, operation
and function test follow the manufacturer’s
guidelines.
• In order to avoid overheating of the Combi
furnace, keep the air inlets of the Combi
furnace (Fig.2 – 11), the air openings to the
area in which the Combifurnace is installed
(Fig.1 – D) and the spacing around the
Combi furnace free of obstruction.
• To ensure clean combustion, keep the wall
cowl free of obstruction. Do not lean any objects against the wall cowl (Fig.1 – F).
• Danger of hot surfaces. The temperature of
the exhaust gases can reach 320°F (160°C).
Do not touch the area around the wall cowl
and do not lean any objects against the wall
cowl or the RV.
Responsibilities of the operator
• The operator is responsible for the water filled
into the Combi water container and its quality.
• The operator is responsible for protecting the
Combi furnace against freezing.
Safe operation
• Use with LP gas (propane) only. Butane or
any mixtures containing more than 10% of
butane must not be used.
– LPG tanks must be filled by a qualified gas
supplier only.
• Danger of damage to the gas system! For
the operation of gas pressure regulation systems, gas-burning devices or gas systems
only gas cylinders that supply gas in the
gaseous phase may be used. Gas cylinders
which supply gas in the liquid phase are
prohibited.
• Ensure that the interior of the RV is sufficiently vented. The Combi furnace might
briefly emit smoke and an odor because of
dust or dirt when it is switched on, especially
if it has not been used in a long time.
– For using the Combi furnace in hot water
mode (140°F (60°C)), let it heat up several
times.
6
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