7
For the connection to the wa-
ter heater and electrical safe-
ty/drain valve, always use
hoses which are resistant to
pressure and hot water (e.g.
Truma water heater hose
SBH, foodproof and pressure
resistant up to 3.5 bar) with
an inside diameter of 10 mm.
For fixed pipe routing (e.g.
John Guest System) Truma
can provide the water con-
nectors (42), the safety/drain
valve (36) and a non-return
valve (33 + 34) with a straight
10 mm diameter tap connec-
tor as special accessories.
When connecting to a central
water supply (rural or city
mains) or if using more pow-
erful pumps, a pressure re-
duction valve must always be
installed which prevents pres-
sures above 2.8 bar from de-
veloping in the water heater.
Attention:
Route water ho-
ses as short as possible and
free of kinks. All hose con-
nections must be secured
with hose clamps (also cold
water hoses!) The thermal
expansion of the water can
cause pressures of up to
3.5 bar before the overpres-
sure safety device in the safe-
ty/drain valve reacts (also in
submergible pumps).
For fastening the hoses to the
wall or floor we recommend
using the hose clips (Art.-no.
40710-00), which also permit
frost-proof routing of water
hoses on the hot air distribu-
tor pipes of the heater.
Note:
In order to guarantee
complete emptying of the
water content and ongoing
sealing tightness of the water
hoses on the device, the
screw connection elements
provided must always be
used.
The
angled connection ele-
ment
(with venting valve,
Fig. K) is connected to the
upper
hot water connec-
tion,
and the
straight con-
nection
is connected to the
cold water connection.
Always route all water
pipes in such a way that
they descend to the safe-
ty/drain valve! There shall
be no guarantee claims for
damage caused by frost!
Installation of the
electrical safety/drain
valve
The electrical safety/drain
valve must be installed in the
heated area in the direct
vicinity of the appliance, in a
place which is easily acces-
sible for the user.
Attention:
When choosing
the location, make sure that
the safety/drain valve is not
installed in the vicinity of oth-
er heat sources (e.g. power
packs)!
Fig. G:
Drill a hole measuring
18 mm in diameter in the
floor of the vehicle. Mount
drain hose on drain connec-
tion fitting and pass through
the floor. Fasten valve with
2 screws. Drain directly to the
outside at a position protect-
ed against splash water (ap-
ply splash guard, if neces-
sary).
Routing of water pipes
Fig. G:
Connect the cold wa-
ter supply (35) to the safety/
drain valve (36). The direction
of flow is of no significance.
Attention:
The water hoses
must be routed free of ten-
sion to ensure satisfactory
operation of the safety/drain
valve!
Screw straight screw fitting
to cold water connecting pipe
(lower pipe) and screw elbow
connection with integrated
vent valve to hot water con-
necting pipe (upper pipe).
Fig. K:
Slide on nut (37),
clamping ring (38) and O-ring
(39). Join screw fitting and
connecting pipe and tighten
with nut (37).
Fig. H + J:
Provide hose con-
nection (40) for cold water
supply between safety/drain
valve (36) and supply on wa-
ter heater.
Route the hot water supply
(41) from the elbow connec-
tion with integrated vent
valve (42) to the hot water
consumers.
Fig. K:
Push the venting
hose, external diameter
11 mm (43), onto the hose
grommet of the venting valve
(44), and lay it to the outside
without any kinks. Ensure
that the bend radius is not
smaller than 40 mm.
Cut off breather hose approx.
20 mm beneath the vehicle
floor, at an angle of 45° facing
the direction of travel.
10
Installation of the
control panel
Attention:
When using con-
trol panels which are specific
to the vehicle or the manufac-
turer, the electrical connec-
tion must be established in
accordance with the Truma
interface descriptions. Any
modification made to the
Truma components pertaining
to this will lead to the invali-
dation of the guarantee, as
well as to the exclusion of
any claims for liability. The
installer (manufacturer) is re-
sponsible for providing in-
structions for use for the user
as well as for identification
printing on the control panels.
When choosing the location,
make sure that neither the
front nor rear of the control
panel is exposed to direct
heat radiation.
If the control panel can only
be installed behind curtains
or similar location where tem-
perature fluctuations may oc-
cur, it is necessary to use a
remote sensor for the room
temperature (refer to opera-
ting instructions).
Length of connecting cable
3 m.
An extension cable measur-
ing 5 m in length is also avai-
lable, if necessary (providing
an overall length of 8 m in
combination) as well as a
control panel frame for „con-
cealed assembly“ of the con-
trol panel and timer (refer to
operating instructions).
Drill a hole measuring 15 mm
in diameter for the cable
leadthrough and pass the ca-
ble through. Connect to con-
trol panel.
Remove control knob. Fasten
control panel with the two
screws and mount control
knob again.
Route the control panel cable
to the appliance. Unscrew co-
ver of electronic control unit.
Attach plug of control panel
cable and screw cover back on.
11
Electrical
connection 12 V
Electric cables, switching
units and control units for
heaters must be arranged in
the vehicle in such a way that
their satisfactory operation
cannot be adversely affected
under normal operating con-
ditions. All cables leading to
the outside must be splash
proof at the leadthrough
opening.
Prior to working on elec-
tric components the appli-
ance must be disconnect-
ed from the power supply.
Switching off at the con-
trol panel is not sufficient!
When carrying out electric
welding work on the body
the appliance connection
must be disconnected from
the vehicle electrical system.
Attention: If the connec-
tions are transposed there
is a risk of cable burning.
This also rules out any
guarantee or liability
claims.
The red cable is positive,
the blue cable is negative!
Connect the appliance to the
fused vehicle electrical sy-
stem (central electrical sy-
stem 10 A) using the 2 x
1.5 mm
2
cable, for lengths
over 6 m use 2 x 2.5 mm
2
ca-
ble. Negative cable to central
ground. For direct connec-
tion to the battery the posi-
tive and negative cable must
be fused. Connections in
Faston terminals, fully insu-
lated (motor vehicle flat con-
nector system, 6.3 mm).
Do not connect any other
consumers to the supply
line!
When using power packs,
please observe that the
appliance is only to be oper-
ated with safety extra-low
voltage in accordance with
EN 60742!
Note:
When connecting sev-
eral 12 V devices we recom-
mend the electronically con-
trolled Truma Power Pack NT
(Art.-no. 39900-01). The Tru-
ma power pack (6 A continu-
ous current) is also suitable
for trickle charging of lead-
acid batteries (not gel batter-
ies!). Other chargers are only
to be used with a car battery
12 V acting as buffer. When
calculating the power re-
quirement always consider
the starting currents: The
peak performance of power
packs can differ. A ripple
content U
Br
≤ 1 V with load
is possible.
Tip:
For saving the battery
we recommend using solar
collectors. Please ask for in-
formation from your dealer.
