77
Instructions for installation and use
S 22
Danfoss District Energy
VI.IE.D1.02
DKDHR
6.
Installation instructions, general
The installation, connection and maintenance of the unit must be
performed by qualified and authorised personnel. Installation must
always be performed in accordance with the applicable legislation
and in compliance with these instructions.
The unit must be installed so that it is freely accessible and can
be maintained without unnecessary disruption. Lift the unit by its
mounting plate/rear section (as far as possible do not lift the unit
by the pipes) and secure it to a solid wall using 2 expansion bolts or
the like positioned in the two keyholes in the mounting plate/rear
section. It is recommended that at least two people are involved in
the installation.
We recommend positioning of rubber spacers between the wall
and the unit to prevent the transfer of resonance noise from the
pump into the wall.
Before commissioning, rinse all the pipes in the household piping sys-
tem thoroughly to remove any impurities, and check and clean the dirt
strainers in the unit.
Test and connections
Before filling the system with water, retighten all the pipe connec-
tions because vibrations and shocks during transport and handling
may have caused leaks. Once the system has been filled with water,
tighten all the pipe connections once more before performing pres-
sure test for leaks. After heating of the system, check all the connec-
tions and retighten if necessary.
Please note that the connections may feature EPDM rubber gaskets!
Therefore, it is important that you DO NOT OVERTIGHTEN the
union nuts.
Overtightening may result in leaks. Leaks caused by
overtightening or failure to retighten connections are not covered
by the warranty.
Fitting piece for heat meter
As standard the S 22 is supplied
without
built-in fitting piece for heat
meter.
If
the unit is ordered with built-in fitting piece for heat meter this is
mounted as described below.
Fitting of heat meter
- Close the ball valves on the district heating line
- Loosen the union nuts at both ends of the fitting piece (20) and
remove it
- Fit/fasten the heat meter - remember gaskets
- Mount temperature sensors in sensor pockets (according to
meter regulations)
- Remember to check and tighten the union nuts and all pipe
connections before commissioning the heat meter.
Safety valve
Always lead the blow-off pipes from the safety valve (16) to a drain
in accordance with applicable legislation.
20
20
16
