Manual Truma BM 14 (page 18 of 68) (English, German, Dutch, Danish, French, Italian, Spanish)

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Exhaust duct

For the Truma boat water hea ter only the Truma Stain less

Steel Exhaust Duct AEM 24 (part no. 39430-00) and the com-

bustion air supply duct ZR 24 (part no. 39440-00) are to be

used, as the appliance has only been tested and approved

with these ducts.

The ends of the stainless steel exhaust ducts are sharp,

make sure to use working gloves when carrying out as-

sembly work.

Fig. A

Permissible duct lengths for wall cowl:

30 – 150 cm. Duct lengths of up to max. 50 cm can be rou ted

as required, as ascending duct or descending by max. 5 cm.

Route the duct with a bend (as shown in Fig. A) to pre vent

splash water from en tering.

Fig. B

Permissible duct lengths with deck cowl:

50 – 200 cm. The duct routing must be ascending at an angle

of at least 30°.

Connection of the exhaust gas double duct to

the water heater

Fig. C

Press end of ex haust duct (1) together so that winding touch-

es winding. Slide clamp (4) over exhaust duct (1). Slide ex-

haust duct over O-ring on the connection fitting (2) up to the

collar (3). Attach with clamp (4) in such a way that the knurled

edge of the clamp encloses the collar. Fasten combustion air

supply duct (5) on the connection fitting (6) using clamp (7).

Always install a new O-ring following any dis assembly!

Assembly of the wall cowl

Fig. C

Assemble wall cowl on as flat a surface as possib le, which is

well exposed to wind from all directions. Drill a hole of 70 mm

diameter (12). Sealing is carried out with the enclosed rubber

seal (13) without further sealing compound!

For greater wall thicknesses first connect ducts to the cowl

from the outside.

Slide rubber seal (13) and clamp (19) onto the cowl inner

part (15). Press end of exhaust duct (1) together so that wind-

ing touches winding, slide over the O-ring on the connection

fitting (18) up to the collar (bend pointing upward) and tighten

clamp (19) in such a way that the knur led edge of the clamp

enclo ses the collar.

Coat serrated connection fitting (14) with plastic body seal-

ant – do not use silicone! – and slide over combustion air

supply duct (5).

Fasten cowl inner part (15) with 3 screws (16) (observe instal-

lation position! The Truma lettering must be at the bottom).

Mount cowl outer part (17) and screw on with 2 screws (20).

Always mount cover cap (21) when the heater is not being

used.

Always install a new O-ring following any dis assembly!

Assembly of the deck cowl

Fig. D

Assemble deck cowl on as flat surface as possible, which is

exposed to wind from all directions. Drill a hole of 80 mm di-

ameter (22). Sealing is carried out using the enclosed cellular

rubber seal (23) without any further sealing combined.

In the case of greater roof thicknesses, first connect the ducts

to the cowl from the outside.

Pass cellular rubber seal (23) and clamp (19) over the ducts.

Press together the end of the exhaust duct (1) so that win-

ding touches winding and slide over the O-ring onto the

connection fitting (24). Fasten using clamp (19) in such a way

that the bead edge of the clamp grasps around the collar.

Slide combustion air duct (5) over the connection fitting (25)

and fasten with clamp (11).

Fasten cowl part (26) with screws (27). Screw on cowl

cover (28) with three screws (29). Always close the deck

cowl when the water heater is not being operated.

A new O-ring must always be installed after any

disassembly!

Water connection

All pressure and submergible pumps up to 2.8 bar are used

for operating the boiler and all mixed combination sets with

or without an electrical switch.

Fig. F

When using immersion pumps, a non-return valve (30 – not

included in the scope of supply) must be fitted between the

pump and the first branch point (arrow points in direction of

flow).

Fig. G

When using pressure pumps with high switching hysteresis,

hot water may flow back through the cold water tap. To pre-

vent the backflow, we recommend that a non-return valve

(31 – not included in the scope of supply) be fitted between

the outlet to the cold water tap and the drain valve.

Pressure and hot water-resistant hoses with an internal

diameter of 10 mm should be used for the boiler and the

safety/drain valve connections.

For fixed pipe routing (e.g. John Guest System) Truma can

supply the water connections (35 + 36), the safety/drain

valve (32) and a non-return valve (30 + 31) with a 12 mm

diameter inner connection as accessories.

If connecting to a central water supply (rural or city connec-

tion) or when using more powerful pumps, a pressure re-

ducer must be used which prevents pressures of greater than

2.8 bar occurring in the boiler.

Route the water hoses so that they are as short and

free of kinks as possible. All hose connections must be

secured using hose clamps (also for cold water)! Pressures

of up to 3.5 bar can occur in the safety/drain valve (also in

submergible pumps) because of the heat of the water and the

resulting expansion.

Hose clips (part no. 40712-01) are recommended for attaching

the hoses to the wall or the floor. If gas heating has been in-

stalled, the water hoses and the hose clips can be laid on the

hot air pipes, which prevents frost.

In order to guarantee that the boiler is completely emp-

ty, the enclosed elbow with breather valve (fig. E: 35)

must be used for the hot water connection!

All hot water pipes should be routed in a descending

manner to the safety/drain valve! There shall be no

claims under guarantee for damaged caused by frost!

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Truma BM 14 Manual

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