Maintenance - Nibe EKS 500 Installation And Maintenance Instructions Manual

Pipe installation
NOTE!
Fit the cover discs before the pipe
installation is made.
The water heater must be supplied with shut-off, non-
return, safety and vacuum valves according to applicable
norms together with thermometer and pressure gauge
The water heater must be supplied with a mixer valve,
which limits the temperature of outgoing hot water to
60 °C. If this valve is not fi tted, some other measure
must be taken to prevent the risk of scalding.
The safety valve must be set to maximum 10 bar
(1 MPa) and the overfl ow pipe must run freely over the
drain. The size of the overfl ow pipe must be the same
as on the safety valve. The overfl ow pipe must be rout-
ed downwards to prevent water pockets and to be frost
proof. The outlet of the overfl ow pipe should be visible.
Electrical connections
NOTE!
Electrical installation and service must
be carried out under the supervision of
a qualified electrician.
The hot water heater has two immersion heater con-
nections for a maximum output of 2 x 9 kW. Separate
supply from group central is routed to each immersion
heater.
Each immersion heater is supplemented with junction
box type K11 (2 pole thermostat, 3 pole temperature
limiter).
Do not modify or reconnect!
NOTE!
The hot water heater must be com-
pletely filled with water before it is
connected on the electrical side.
Filling
The hot water heater is fi lled by fi rst opening a hot
water tap in the system and then opening the shut off
valve on the incoming cold water. This valve should
then be fully open during operations. When only water
comes out of the hot water tap (initially an air-water
mixture comes out of the tap) can the hot water tap be
shutoff and the water heater is fi lled.
Installation and maintenance
Emptying
Turn off the power to the water heater.
Shut off the cold water inlet with valve.
Loosen the cover of the drain valve (7) and mount the
supplied hose connector and hose.
NOTE! The drain valve will open as soon as the
supplied hose connector is mounted.
During draining, air must be let into the water heater by
loosening the hot water connection (2) or a hot water
tap. In order to ensure the complete emptying of the
water heater the hose connection must be completely
tight and the outlet be below the lowest point of the
water heater.
When mounted in locations exposed to the risk of frost,
the water heater must be emptied whenever not in ope-
ration. Freezing will result in the water heater bursting.

Maintenance

The safety valve must be inspected regularly, about 4
times a year, to prevent clogging. The check is made by
opening the safety valve manually, water should then
fl ow through the overfl ow 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 wa-
ter heater, resulting in a pressure increase, whereby the
safety valve opens.
Dealing with malfunctions
If the water fails to heat up, check the fuses in the
distribution box. If none of the fuses have blown, the
reason may be that the temperature limiter has tripped
as a result of a fault in the hot water heater. Once the
fault has been remedied, the temperature limiter can
be reset. This must be done under the supervision of a
qualifi ed electrician.
Service
When a service is necessary, contact the main contrac-
tor; you will need, under all circumstances, to state the
manufacturing number (95) and installation date.
EKS 500
GB
5