Maintenance - Nibe VPA 300/200-CU Montage- Und Bedienungsanweisung

Pipe installation
The water heater must be fitted with the requisite valves
according to applicable standards, such as a safety valve,
cut-off valve, non-return valve, mixing valve and vacuum
valve. Copper inserts should be fitted when a plastic pipe or
annealed copper pipe is used.
An discharge pipe must be routed from the safety valve to a
suitable drain. The size of the discharge pipe must be the
same as on the safety valve. The discharge pipe must be
routed downwards to prevent water pockets and must be
frost proof. The outlet of the discharge pipe should be
visible.
The water heater is equipped with two outgoing docking
connections (5) to facilitate docking from the preferred side
of the water heater.
A drain valve can be fitted to the G11/2" connection (5)
(use an adapter from G11/2" to the required size) which is
not used for docking.
Filling
Water heater
The water heater is filled by first opening a hot water tap in
the system and then opening the cut-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 tap be shut off and the water heater is filled.
Heating system
When filling the heating system, the double-jacketed space
should be vented by opening the air nipple (6). The air
nipple can be closed when water comes out of the air hole.
Electrical installation
VPA 300/200 can be supplemented with one or two
immersion heaters. The connection size is G2" and the
maximum immersion heater length is 650 mm.
NOTE!
Electrical installation and service must be
carried out under the supervision of a qua-
lified electrician. Electrical installation and
wiring must be carried out in accordance
with the stipulations in force.
Emptying
Water heater
Emptying the water heater takes place through the siphon
in the cold water connection (1). The hot water tap in the
system can be opened and a pipe coupling on the hot
water side can be loosened to provide an air supply.
Heating system
Empty the double-jacketed space through the siphon on the
docking connection (5), outgoing to the external heat
source. Here the air nipple (6) can be opened to supply air.
The entire heating system must be taken into consideration
before emptying the double-jacketed space.

Maintenance

Safety valve (not supplied)
The safety valve should be inspected regularly, about 4
times a year, to prevent clogging. It must be replaced if it
does not work correctly.
The safety valve sometimes releases a little water after hot
water has been tapped. This discharge is due to the cold
water that pours into the water heater expands and
produces a pressure increase, which opens the safety valve.
Sacrificial anode (only VPA 300/200 -E)
The water heater is equipped with a magnesium anode (40)
which offers extra corrosion protection. The anode is
consumed partly by sacrificing itself for the pores in the
enamel and 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 diameter of 21
mm. When the diameter has reduced in its most used area
to under 10 mm the anode is consumed and must be
replaced. To change anodes in confined spaces, there is a
chain anode available that only needs about 180 mm above
the heater.
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 sacrificial anode (40) is a consumable
article.
With special water qualities, a direct current anode
(accessory) is recommended.
Service
Contact the main contractor when a service is necessary.
You must then state the serial number (95) 14 digits.
VPA 300/200
GB
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