GENERAL INFORMATION AND FEATURES
ENGLISH
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5. CONSTRUCTION DESCRIPTION AND OPERATION
The purpose of this device is to heat the domestic hot water in two different ways (see FIG_5-1.):
A. through the heat exchange between the engine cooling water and the water stored in the tank. Such heat
exchange is possible thanks to a heat exchanger. The engine cooling water circulates through a coil placed at the
center of the tank to spread the heat evenly.
B. by means of an electric resistance (supplied as standard with the appliance).
Main parts (see FIG_5-2.):
1. Storage tank: it is entirely made of steel submitted internally to a double enamelling treatment that is a vitreous
coating cooked at over 850 °C.
2. External coating: aluminum; it is highly resistant to shocks and external solicitations, having at the same time a very
pleasant design.
3. Thermal insulation: made of expanded polyurethane with closed cells avoids unnecessary heat losses. In this way
the heat loss by thermal inertia is reduced to 1 ° C per 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. Electrical resistance: the device is equipped with an electric heating element to heat the water even when the boat
engine is turned off (for example when the boat is on the dock). Material: Incoloy corrosion resistant alloy.
6. Thermostat: has two functions, namely
a. temperature control: interrupts the power supply to the heater element when reaching the set temperature
b. overtemperature safety: interrupts the power supply to the resistance in case of excessive water temperature.
characteristics: temperature control: 0 ° C - 60 ° C; Differential temperature: about 9 ° C; intervention
temperature: 83 ° C; maximum current: 20 A
7. Cold water inlet and pressure relief valve (it protects the tank from possible excessive pressures caused by the
expansion of water during heating. Automatically, without the assistance of different energy from that of the hot fluid
under pressure, discharge a quantity of fluid such as to prevent them from being exceeded the predetermined
pressure and temperature limits to protect the storage tanks. Calibration: 800 kpa - 116 psi)
8. Hot water outlet
10. Mounting bracket
6. GENERAL WARNINGS
The installation must be performed in accordance with current legislation, by a qualified person who can do, not only
a proper set up of the device, but also the necessary tests before starting the water heater.
during the original installation and subsequent maintenance, follow the instructions in this booklet carefully. changes
to any type of connection or failure to follow instructions will cause the warranty expires.
before the installation, maintenance or repair, remove the power supply unit.
WARNING: USE THE BOILER ONLY FOR APPLICATIONS IN THIS SECTION. DO NOT USE THIS
EQUIPMENT FOR OTHER TYPES OF OPERATION. THE
MANUFACTURER DOESN’T
ASSUME
RESPONSIBILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES CAUSED BY IMPROPER
APPLIANCE.
7. POSITION AND ASSEMBLY
The device can be installed in any space, without limitation, subject to compliance with the instructions provided in section 1.
GENERAL PRECAUTIONS.
On the unit there are two fixing brackets (FIG_7-1). This way you get easy installation but stable and safe.
The appliance must be installed in such a way that the heat exchanger and / or the electrical resistance are placed in the
lower part (FIG_7-2). For other installations not covered in this manual and for installation on sloping walls, contact our
technical office.
It is possible to install the device even on sloping walls (FIG_7-2)
8. HYDRAULIC CONNECTIONS
To extend the life of the appliance water quality must meet the following limits:
1. hardness comprised between 15 and 50 ° F (in
particular, where the water has undergone a softening
or desalination treatment)
2. chlorides comprised between 25 and 100 mg / l
3. PH between 6.5 and 9.5
4. conductivity between 400 and 1500mS / cm
Minimum pressure water inlet: 70 kpa.
Maximum water inlet pressure: 750 kpa (for higher inlet pressures is necessary to mount a pressure reducer with
compensation of inlet pressure; adjustable downstream pressure, max 700 kpa)
Connect the appliance according to the following directions:
