050608.01
5
Calorifier WH20B, WH31B, WH45B, WH55B and WH75B
ENGLISH
Installing the Fittings
On the tap water side of the calorifier, use only corrosion-resist-
ant fittings (stainless steel or brass).
WARNING!
Never use fittings made of steel or iron!
Fit a non-return valve (8) on the tap water intake and an excess
pressure valve (6) on the tap water outlet.
Pressure Valve
The pressure valve should be adjusted to 4 Bar (4 kgf/cm
2
). As
the water heats up, the pressure valve will operate, water drop-
lets 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 fittings, use a good qual-
ity, removable screw-thread sealant. Disassembly may be nec-
essary for maintenance, draining and preparation for winter!
Pipes for Tap Water
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 and a pressure of 8 Bar (8kgf/cm
2
).
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, with a working pressure
of 8 Bar (8kgf/cm
2
).
Article Code: WHHOSE16.
Pipes from Engine to Calorifier
The coolant water pipes from the ship’s engine to the calorifier
should be as short as possible, so that the increase in engine
coolant 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 calori-
fier/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.
TAKE CARE
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, and a pressure of 4 Bar (4 kgf/cm
2
). 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 recom-
mended that the pipes and fittings are insulated.
Heating Element
There is an electrical heating element, power 1000 Watt / 230
V, fitted in the boiler. The heating element is controlled by a
thermostat.
Connect the heating element as shown in the wiring diagram.
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 element (with adjustable thermostat)
is available:
Art. code
Power / Voltage
WHEL22500
500 W / 230 V
WHEL110
1000 W / 120 V
Alle verwarmingselelementen zijn voorzien van uitwendige
schroefdread G 1 1/4.
All heating elements are fitted with external screw thread
G 1 1/4.
Clean the screw thread if necessary and fit the heating element
using hemp and liquid packaging to seal the screw thread con-
nection.
Technical Data
Type
WH20B WH31B WH45B WH55B WH75B
Tap Water Tank
Capacity
20 l
31 l
45 l
55 l
75 l
Connections
G 1/2, male thread
Max.Pressure
4 bar (4 kg/cm
2
)
Material
Stainless steel, AISI 304, 1.5 mm thick
Heat Loss
About 12˚C per 24 hours
Outer Tank (Engine coolant)
Capacity
4 l
7 l
7,5 l
8 l
9,5 l
Heated surface
0,4 m
2
0,55 m
2
0,73 m
2
0,87 m
2
1,11 m
2
Connections
G 1/2, male thread
Max.Pressure
3 bar (3 kgf/cm
2
)
Material
AISI 304, dikte 2 mm
Insulation
Polyurethane, 35 mm thick with AISI 304
cover
Electric Heating Element
Max.Power
1000 Watt
Connection
G 1 1/4, female thread
Pressure Valve
Setting
4 bar (4 kgf/cm
2
)
Weight,
empty
23 kg
28 kg
34 kg
39 kg
48 kg
