8
DKDHR
VI.GP.N2.02
Danfoss District Energy
Instructions Water
Heaters
10.0 Mounting
10.1 Test and connections
Check and tighten all connections before adding water to the system,
as vibrations during transport may have caused leaks.
After having added water to the system, tighten all the connections
before performing leak test. If the water heater operates in accord-
ance with the dimensioning basis, re-tighten the connections and
take the water heater into continuous use.
NB!
Please note that the connections may be supplied with EPDM rubber
gaskets.
Therefore take care not to overstrain the union nuts, as
this may result in leaks.
The manufacturer accepts no liability for
leaks that result from overstrain of union nuts.
10.2 Systems with domestic hot water (DHW) recirculation
If the household plumbing system includes hot water recirculation
the water heater must be connected to the hot water recirculation
system.
Circulation set is not included in the delivery and must be ordered
separately.
It is to be recommended to prepare the substation for recirculation
before mounting it on the wall.
The recirculation pipe in your household plumbing system must
be connected to a nipple, mounted on the circulation pipe of the
substation. -
See pages 9 to 12 for information about preparation
of substation for and connection to the DHW recirculation system.
Remember always to mount circulation pump and non-return
valve on the circulation pipe and to mount safety valve on the
DCW inlet.
The pump must be installed so that the pump is pumping
water towards the water heater.
If a time-controlled pump is used, it is to be recommended that the
circulation water temperature is set to approx. 35 °C.
If the circulation pump (outside the unit) is switched off for a longer
period, it is to be recommended that the Danfoss FJVR thermostat
is closed during the same period.
NOTE!
Please note that water heaters with Danfoss AVE expanion unit
must
not
be used on systems with DHW recirculation.
Necessary assembly, start-up and maintenance work must be
performed by qualified and authorized personnel only, and always
in compliance with local regulations and this instruction manual.
The water heater must be easily accessible, enabling maintenance
work without undue discomfort.
The water heater is intended for wall mounting and the mount-
ing sheet on the back of the water heater has got holes for screw
installation. Lift the water heater in the mounting plate and fix it
to a solid wall, which has the necessary load-bearing capacity, in a
workmanlike manner with two strong bolts, screws or expansion
plugs.
Note,
The Akva Lux II and Akva Les II water heaters
are not me-
chanically fixed in the insulation back and must be handled by lifting
in both pipes and insulation simultaneously.
All pipes and connections must be cleaned and rinsed before start-
up. After that the strainers should be cleaned.
A label for each of the different connections is placed on the water
heater. Connect the water heater to the household system according
to these symbols as well as the instructions in this manual.
Circulation pipe connection
