UK
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pag. 2/4
2-210-0335_libretto_BT_2016-02_testo_UK.docx
4. DIMENSIONS (SEE FIG_4-1)
A
B
C
D
E
F
BT2205 -
BT2208 -
BT2212
mm
320
267
335
334
410
490
BT22051 - BT22081 - BT22121
inch "
12,6 10,4 13,1 13,0 16,0
19,3
BT3005 -
BT3008 -
BT3012
mm
320
267
470
334
545
625
BT30051 - BT30081 - BT30121
inch "
12,6 10,4 18,3 13,0 21,3
24,6
BT4505 -
BT4508 -
BT4512
mm
320
267
730
334
805
885
BT45051 - BT45081 - BT45121
inch "
12,6 10,4 28,5 13,0 31,4
34,9
BT6005 -
BT6008 -
BT6012
mm
320
267
920
334
995
1070
BT60051 - BT60081 - BT60121
inch "
12,6 10,4 35,9 13,0 38,8
42,1
BT8005 -
BT8008 -
BT8012
mm
320
267
920
334
995
1280
BT80051 - BT80081 - BT80121
inch "
12,6 10,4 35,9 13,0 38,8
50,4
5. CONSTRUCTIVE DESCRIPTION AND OPERATION
The purpose of this appliance is to heat sanitary hot water in two different ways (see FIG_5-1):
A. through the heat exchange between the engine cooling water and the water stored inside the tank. Such a
thermal exchange is possible thanks to a heat exchanger. The engine cooling water circulates through a heat
exchanger placed in the middle of the tank to diffuse the heat uniformly.
B. by means of an electric resistance (supplied with the unit).
Main parts (see FIG_5-2) :
1. Storage tank: it is entirely made of steel submitted internally to an enamelling treatment that is a vitreous coating
cooked at over 850 °C.
2. External casing: it is highly resistant to shocks and external solicitations, having at the same time a very pleasant
design.
3. Heat insulation: it is made in expanded polyurethane with closed cells and avoids useless heat loss. In this way the
heat loss for thermal inertia is reduced to 1 °C every hour for a period of 24 hours.
4. Heat exchanger: it is made of enamelled iron and its exchange surface allows to exploit at best the heat of the engine
cooling water and to get hot water also in extreme conditions (very small temperature differences).
5. Thermostat: it has two functions:
a. adjustable thermostat: it cuts off the power to the electrical heating element when the set temperature is
reached (the temperature can be adjusted between 0 ° C and 65 ° C, according to
the user’s
needs).
b. safety thermostat: in case of bad operation of the appliance, it cuts off the power to the electrical heating
element when the temperature of the water reaches 90 ° C. A manual intervention is necessary to restart the
appliance (manual reset).
Range of temperature:
0 to 65 °C
Temperature differential:
about 9 ° C
Safety temperature:
90 °C
Max current:
20 A
Max temperature:
120 °C
6. Electrical heating element: The unit is equipped with an electrical heating element (500/800 / 1200W, 120 / 230V) to
heat water even when the boat engine is turned off (for example when the boat is at the dock) . Material: Incoloy, an
alloy resistant to corrosion
7. Cold water inlet
8. Pressure relief and non-return valve: it prevents the reflux of hot water through the cold water inlet. It is also a safety
valve against overpressure: it protects the tank against any possible excessive pressure caused by the expansion of
water while heating. The water is drained through a suitable drain, which the valve is equipped of. Setting: 800 ± 50
kPa (116 ± 7 psi )
9. Hot water outlet
10. Brackets
11. Magnesium anode: it protects the tank against corrosion
6. INSTALLATION INSTRUCTIONS
The installation has to be carried out, in compliance with the current regulations, by a qualified person, being able not
only to set up the appliance correctly, but also to do all the necessary tests before starting up the water heater.
During the original installation or further maintenance, follow the instructions contained in this booklet carefully. Changes
to any type of connection or the non-observance of the instructions supplied will cause the guarantee to be invalidated.
Cut off the power to the appliance before installation or any intervention of maintenance or restoration.
7. LOCATION AND MOUNTING
The appliance is equipped with two fixing brackets (A - FIG_7-1 ). In this way we get an easy, but fixed and stable installation.
Use the kit of fixing nuts, that is supplied with the water heater, to fix the appliance.
The appliance has to be installed in such a way that the heat exchanger and/or the electric heating element are placed at the
