050612.01
5
vetus®
Water Heater WHTxx
4.2 Pipes from Engine to Calorifier
(see pages 14 and 15)
The coolant water pipes from the ship’s engine to the calorifier
should be as short as possible, so that the increase in engine cool-
ant capacity is kept to a minimum and no extra expansion space is
required. These pipes must be installed so that they are absolutely
self-bleeding.
The pipes should have the same cross-section as the calorifier/heater
connections on the ship’s engine, so that no extra resistance is created.
Also consult the engine supplier’s instructions.
Use a good quality reinforced hose or copper pipes.
c
aution
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
2
, 58 psi). You can use
the same hose as for the tap water - Vetus Article Code: WHHOSE16.
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.
4.3 Installing the Fittings
(see page 19)
On the tap water side of the calorifier, use only corrosion-resistant
fittings (stainless steel or brass).
W
arning
!
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 (13) on the tap water outlet.
4.4 Pressure Valve
The pressure valve should be adjusted to 4 bar (4 kgf/cm
2
, 58 psi). 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 out-
let connection to a pressure-free drain pipe.
When assembling all accessories and fittings, use a good quality,
removable screw-thread sealant. Disassembly may be necessary for
maintenance, draining and preparation for winter!
4.5 Pipes for Tap Water
(see page 16)
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
2
, 116 psi).
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: WHHOSE16.
4.6 Heating Element
There is an electrical heating element, power 1500 Watt / 230 V, fitted
in the calorifier. 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 21.
Connect the heating element as shown in the wiring diagram. Con-
nect the earth terminals, both from the boiler and the heating ele-
ment, to the earthing point on the boat!
A different heating element can be fitted as an alternative. The fol-
lowing electrical heating element (with adjustable thermostat) is
available:
Art. code
Power / Voltage
WHEL220
1000 W / 230 V
WHEL22500
500 W / 230 V
WHEL110
1000 W / 120 V
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 element.
Clean the screw thread if necessary and fit the heating element us-
ing hemp and liquid packaging to seal the screw thread connection.
5 Technical Data
Type:
WHT25
WHT50
WHT75
WHT100
Tap Water Tank
Capacity, litre
25 l
50 l
75 l
100 l
Imp. gallon
5.5
11
16.5
22
US gallon
6.6
13.2
19.8
20.4
Connections
G 1/2, male thread
Max. Pressure
4 bar (4 kg/cm
2
, 58 psi)
Material
Duplex stainless steel, thickness 1 mm (
1
/
32
”)
Insulation
Polyurethane, 50 mm (1
31
/
32
”)
thick with white
painted steel cover, thickness 0,5 mm (
1
/
32
”)
Heat Loss
About 12˚C (54˚F) per 24 hours
Heating spirals (engine cooling water/CH water)
Capacity, litre
0,5 l (
1
/
64
”)
Connections
G 1/2, male thread
Max. Pressure
6 bar (6 kgf/cm
2
, 87 psi)
Material
Stainless steel
AISI 316L
Electric Heating Element
Max. power
1500 Watt
Connection
G 1 1/4, female thread
Pressure Valve
Setting
4 bar (4 kgf/cm
2
, 58 psi)
Gewicht
Weight
11 kg
17 kg
23 kg
28 kg
24,3 lbs
37,5 lbs
50,7 lbs
61,7 lbs
ENGLISH
