Electrical Installation; Installing A Thermostat; Maintenance - Nibe EMINENT-35 E Installation And Maintenance Instructions Manual

Electrical installation

The electrical installation and service should be carried
out according to the directives that apply at the site
where the water heater is installed and used.
The hot water heater is equipped with a power cord and
earthed plug for 1-phase installation (1 kW).
1-phase installation is the best option for the service life
of the immersion heater.
If the power cord is damaged replacement must be car-
ried out under the supervision of a qualified electrician.
The lowest point of the power cord should be below the
power socket when you connect the hot water heater to
the socket. This prevents any drops of water from being
led into the socket.
When 3 kW is required the hot water heater must be
connected with a permanent installation (2x400V). At
a fixed installation shall the water heater be preceded
by an omnipolar circuit breaker (preferably with a signal
lamp) with at least a 3 mm gap. The existing connection
cable can be used if you cut off the plug.
NOTE! All work must be carried out under the supervi-
sion of a qualified electrician.
Electrical circuit diagram
Thermostat/
temperature limiter (5)
Immersion heater (6)

Installing a thermostat

A setting of 60 °C (max about 80 °C) is recommended
for the best operating conditions.
About 60 °C
EMINENT-E/CU/R 35, 55, 100, 120

Maintenance

Safety valve
The safety valve (23) should be inspected regularly, about
4 times a year, to prevent clogging.
The check is made by turning the safety valves knob
anticlockwise, water should then flow through the over-
flow pipe. If this does not happen then the safety valve is
defective and must be changed.
The safety valve sometimes releases a little water after
hot water has been tapped. This discharge is caused by
the expansion of the cold water taken into the water
heater, resulting in a pressure increase, whereby the
safety valve opens.
Sacrificial anode (only EMINENT-E)
The water heater is equipped with a magnesium anode
(40) that provides extra corrosion protection. The anode
is consumed partly by sacrificing itself for the pores in
the enamel, partly through self-consumption depending
on the chemical composition of the water.
Check the anode within a year. And then regularly in
relation to its use. When the anode is new it has a dia-
meter of approx. 21 mm. When the diameter has redu-
ced in its most used area to under 10 mm the anode is
consumed and must be replaced.
If anode consumption has not occurred after a few
years, this may be due to inferior conductivity in the
water and a water analysis is recommended.
NOTE! The anode is a consumable part.
Replacement/Inspection of the sacrificial anode
The anode can be replaced/inspected without the need
of emptying the water heater, when there is a hot water
tap on the pipe system located below the highest point
of the water heater. If there is not a hot water tap or
the hot water heater has been installed horizontally,
the hot water heater must be emptied, see the section
"Emptying".
1 Switch off the power to the water heater.
2 Close the shutoff/non-return valve by turning
the knob (22) clockwise until it bottoms.
3 Open the hot water tap mentioned above.
4 Remove the plastic cover (3) and the insulation
plug, see the figure.
5 The sacrificial anode (40) is unscrewed using a
27 mm, or 24 mm, socket spanner.
To change anodes in confined spaces, there is a chain
anode available that only needs about 180 mm above
the heater. The chain anode can only be used in verti-
cally installed hot water heaters and should be cut as set
out in the table, see "Technical specifications".
GB
11