Vetus WHT25 Manuel D'installation Et D'utilisation page 9

Always connect metal pipes with short lengths of hose to the
engine and the calorifier. The hose will accommodate vibration
and prevent the pipes splitting.
The reinforced hose should be resistant to a temperature of at least
100˚C (212˚F), and a pressure of 4 bar (4 kgf/cm
the same hose as for the tap water - VETUS Article Code: HWHOSE16.
Fit each hose connection with a stainless steel hose clamp.
In order to reduce heat loss with the engine off, it is recommended
that the pipes and fittings are insulated.
3 .3 Installing the Fittings
(see page 31)
On the tap water side of the calorifier, use only corrosion-resistant
fittings (stainless steel or brass).
Never use fittings made of steel or iron!
Fit a non-return valve (3) on the tap water intake and an excess pres-
sure valve (15) on the tap water outlet.
3 .4 Pressure valve/non-return valve
The pressure valve and the non-return valve have been combined
in a single fitting. Mount this pressure valve/non-return valve (15)
on the tap water intake. The pressure valve has been set to 6 bar
(6 kgf/cm2). As the water heats up, the pressure valve will operate,
water droplets and a little water loss is normal. If you do not want
water running about freely, then connect the outlet connection to
a pressure-free drain pipe. When assembling all accessories and fit-
tings, use a drinking water approved, sealing cord (e.g. Loctite 55) or
liquid sealant (e.g. Loctite SI 5331). Disassembly may be necessary for
maintenance, draining and preparation for winter!
3 .5 Pipes for Tap Water
(see page 27)
Use a good quality reinforced hose, stainless steel or copper pipes for
the tap water pipes. Always connect pipes to the calorifier with short
lengths of hose. These lengths of hose will accommodate vibration
and prevent the pipes splitting.
The reinforced hose must be of foodstuffs quality and resistant to at
least 100˚C (212˚F) and a pressure of 8 bar (8 kgf/cm
Insulate the pipes and fittings to prevent unnecessary heat loss.
VETUS supplies a hose which is suitable for tap water. This hose has
an internal diameter of 16 mm., is tasteless, non-toxic, resistant to
temperatures up to 160˚C (320˚F), with a working pressure of 8 bar (8
kgf/cm 2 , 116 psi). Article Code: HWHOSE16.
3 .6 Heating Element
There is an electrical heating element, power 1500 Watt / 230 V, fitted
in the calorifier (WHEL1500). The heating element is controlled by a
thermostat.
Remove the connecting lid L and lead the cable from E to the heating
element, see drawing on page 32.
Connect the heating element as shown in the wiring diagram.
Installation and user manual Water Heater WHTxx
c
aution
2 , 58 psi). You can use
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2 , 116 psi).
Connect the earth terminals, both from the boiler and the heating
element, to the earthing point on the boat!
A different heating element can be fitted as an alternative. The following
electrical heating elements (with adjustable thermostat) are available:
Product code
WHEL1500
WHEL220
WHEL22500
WHEL110
All heating elements are fitted with external screw thread G 1 1/4.
• Use a right-angled open-ended spanner or an open ring spanner,
size 55 when assembling and disassembling the heating ele-
ment.
• Clean the screw thread if necessary. Provide the threads with a
sealing cord approved for potable water (e.g. Loctite 55) or liquid
sealant (e.g. Loctite SI 5331). After this, install the heating element
3 .7 Troubleshooting
Working with 230 V alternating current (AC) can be life-threat-
ening. Improper use or a moment's inattention can lead to seri-
ous injury or even death by electrocution. If in doubt about the
correct knowledge or skills, consult a qualified electrician!
Never connect the power supply to the heating element with-
out a thermostat!
If the calorifier does not heat the water, perform the following checks:
Calorifier
• Check that the calorifier is completely filled with tap water. Top it
up if necessary.
Supply voltage
• Check that the boiler is connected to the correct supply voltage
(230 V AC) and adjust if necessary.
Thermostat
• Switch off the calorifier power supply and allow the calorifier to
cool down, if necessary.
• Connect a multimeter to points 1 and 2 of the thermostat (see
electrical diagram, chapter 11, page 32).
• Switch on the calorifier power supply. The thermostat switches on
and the voltage between point 1 and 2 is 230 V. If this is not the
case, replace the thermostat.
• Press the 'SAFETY RESET' button and check the thermostat again.
Heating element
If the supply voltage is correct and the thermostat works but the
calorifier does not heat up, the heating element should be replaced.
Power Voltage
1500 W 230 V
1000 W 230 V
500 W 230 V
1000 W 120 V
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050612.01
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