Vetus WHT25 Manuel D'installation Et D'utilisation page 10

4 Use
Proceed as follows before using the calorifier for the first time.
• Clean the inside of both the tank and heating coils by rinsing
them with clean tap water.
• Open the stop cock in the water pipe between pump and tank.
Open the hot water tap to release air from the tank and it fills with
water.
• Fill the heating coils from the engine's cooling system and the
ship's heating system respectively.
• Check all connections, pipes and fittings for leaks.
In the event of a leak, stop the engine immediately or switch off
the ship's heating system and repair the leak before restarting
the engine or switching on the heating system.
• Stop the engine and check the coolant level. Top up if necessary.
• Check the liquid level of the heating system and top up if neces-
sary.
• The calorifier is now ready for use.
4 .1 Heating with engine heat
The engine has to run for a certain time before the tap water heats
up. The time required depends on the size of the calorifier and the
size of the engine.
The hot tap water can be very hot, temperatures up to 80˚C
(176˚F) are possible!
For safe use, always mix with cold water.
4 .2 Heating while the engine is idle
When the engine is idle, the water can be brought to and maintained
at the desired temperature through the ship's heating system or the
electrical heating element.
Heating tap water in the boiler tank in this manner usually takes con-
siderably more time than by using the heat of the engine.
The amount of heat created by an internal combustion engine,
and thus available for heating the calorifier, is about the same as
the engine power output. So an engine which delivers 50 kW at
the shaft will also provide about 50 kW of heat! Generally speak-
ing, a ship's heating system has a substantially smaller heat ca-
pacity and an electrical heating element is only 1.5 kW or less.
Never switch on the electric heating element if the calorifier
tank is not completely filled with tap water.
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5 Preparation for Winter
The entire drinking water system, including the boiler's tap water
tank, must be completely drained. See "12 Draining the Boiler" on p.
34. Never fill the drinking water system with anti-freeze as an alter-
native. This is very toxic.
• To drain the boiler, remove the hoses from connections C and D.
Open the tap water taps so that the tap water pipes drain com-
pletely.
• Remove the screw from the pressure valve/non-return valve and
open the purge valve. The boiler's tap water tank can now drain
completely.
• Once the tap water tank has been drained, close the purge valve
and re-fit the screw.
The heating spiral does not require draining.
6 Technical Data
Type: WHT25
Tap Water Tank
Capacity, litre 25 l
Imp. gallon 5.5
US gallon 6.6
Connections
Max. Pressure
Material Duplex stainless steel, thickness 1 mm (
Insulation Polyurethane, 50 mm (1
painted steel cover, thickness 0,5 mm (
Heat Loss
Heating spirals (engine cooling water/CH water)
Capacity, litre
Connections
Max. Pressure
Material
Electric Heating Element
Max. power
Connection
Pressure Valve
Setting
Gewicht
Empty 11 kg
24,3 lbs
Installation and user manual Water Heater WHTxx
WHT50 WHT75
50 l 75 l
11 16.5
13.2 19.8
G 1/2, male thread
6 bar (6 kg/cm 2 , 87 psi)
31 / ") thick with white
32
About 12˚C (54˚F) per 24 hours
0,5 l ( 1 / ")
64
G 1/2, male thread
6 bar (6 kgf/cm 2 , 87 psi)
Stainless steel AISI 316L
1500 Watt
G 1 1/4, female thread
6 bar (6 kgf/cm 2 , 87 psi)
17 kg 23 kg
37,5 lbs 50,7 lbs
WHT100
100 l
22
20.4
1 / ")
32
1 / ")
32
28 kg
61,7 lbs