Truma Combi 4 Installation Instructions Manual page 14

Route all water lines so they drop down to FrostControl!
There shall be no guarantee claims for damage
caused by frost!
Installing FrostControl (safety/drain valve)
FrostControl must be installed in the immediate vicinity of the
unit in the heated room in a position that the user can easily
access. Make sure that rotary switch (30) and push button (31)
can still be operated.
When selecting a location, please ensure that the FrostControl
(24) is not installed in the vicinity of external heat sources
(e.g. power supplies) or in the immediate proximity of warm
air pipes.
Drain directly to the outside at a position protected against
splash water (apply splash guard, if necessary).
24
31
31
25
Drill a hole (18 mm diameter) in the floor of the vehicle. Attach
drain tube (24a) to drain connection, insert both through the
floor and route outside. Seal gap between drain hose and hole
with plastic body sealant from below. Fasten FrostControl with
two screws B 5.5 x 25 (included with delivery).
Routing of water pipes
Connect cold water supply (23) to FrostControl (24). Route the
water hoses without tension in order to ensure that the safety/
drain valve will work properly!
Slide elbow fitting (27) onto cold water connecting pipe and
elbow fitting with integrated ventilating valve (28) onto hot
water connecting pipe of heater as far as it will go. Pull in
opposite direction in order to make sure the elbow fittings are
securely attached.
Create the hose connection (25) for cold water supply
between FrostControl (24) and the inlet on the boiler.
Ensure that the cold water supply does not come into
contact with cold bridges (e.g. the outer wall) in order to
prevent freezing.
14
30
23
24a
32
29
20 mm 45º
Route the hot water supply (26) from the elbow connec tion
with integrated vent valve (28) to the hot water consumers.
Push the venting hose, external diameter 11 mm (29), onto
the hose grommet of the venting valve (32), and lay it to the
outside without any kinks. Ensure that the bend radius is not
smaller than 40 mm.
Cut off the aeration hose about 20 mm below the vehicle floor
at a 45° angle to the direction of travel (see image).
Installing the room temperature sensor
When selecting the location, bear in mind that the room tem-
perature sensor must not be subjected to any direct radiant
heat. For optimum room temperature regulation, we recom-
mend that the room temperature sensor be fitted above the
entrance door.
Please ensure that the room temperature sensor is al-
ways attached to a vertical wall. There may be no ob-
structions preventing the room air from flowing around it.
Drill a hole 10 mm in diameter. Guide the connection cable
through the drillhole from behind and plug the cable end to
the sensor by means of an insulated connector plug (there is
no need to be concerned about polarity). Slide in the room
temperature sensor and lay the cable end with the two insu-
lated connector plugs to the heating electronics unit (extend
to a maximum overall length of 10 m using 2 x 0.5 mm² cable
if necessary).
The provided room temperature sensor must always be
connected, otherwise the heater will switch to fault.
Installing the control panel
(Combi 4 / Combi 6)
28
Reserve a place for the control panel at an easily visible
location. The scope of delivery includes a 3-metre connecting
cable (34).
Drill 55 mm dia. hole. Insert the plug (35) on the connection
cable (34) into the control panel (33). Make sure that the plug
engages in the control panel. Clamp the connecting cable (34)
into the control panel cable guide, slide through towards
the rear and route to the heater. Attach control panel with
27
4 screws (36) and fit the cover frame (37).
34
35
10 mm
m
m
5 5
Ø
36
35
33
38
38
37