10 | © Danfoss | Produced by Danfoss Redan A/S | 2022.03
145X2068
AQ40514397064001-000101
6. GENERAL, MOUNTING OF HEAT METER AND SAFETY VALVES
General
The installation, connection and maintenance of the substation 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 substation must be installed so that it is freely accessible and can
be maintained without unnecessary disruption. Lift the substation
by its mounting plate/rear section and secure it to a solid wall using
4 sturdy bolts (max. 8 mm), screws or expansion bolts positioned in the
four keyholes.
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 substation.
Connect the substation to the household piping in accordance with
the labelling at the bottom and/or in accordance with the instructions
in this manual.
For fully insulated systems
The insulation front panel on the VXe substations can be removed with-
out using tools. Take hold of the air duct in the top and bottom of the
front insulation section and pull carefully forward until the front insu-
lation section releases from the rear section. Then pull gently until the
front section is free from the components.
Test and connections
Before filling the system with water, retighten all the pipe connections
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 pressure
test for leaks. After heating of the system, check all the connections 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.
Heat meter, fitting pieces.
The substation is equipped with 3/4” fitting pieces in the DH return line
for fitting of a heat meter.
Calculator of the heat meter can be mounted into a special chamber,
that is designed for easy reading.
The substation is always equipped with 3/4” fittingpieces in the cylinder
return line for fitting of a heat meter..
Fitting of heat meters
- Close the four ball valves on the district heating and the
heating sides.
- Loosen the union nuts at both ends of the fitting piece (A + B)and
remove it.
- Fit the heat meter, - remember to insert gaskets.
- Mount sensor, - remember to insert gaskets.
- Mount temperature sensors in sensorpockets (according to
heat meter instructions.
- After mounting of heat meter remember to check and tighten
all pipe connections before commissioning the substation.
Meter display (reading unit)
The meter reading unit is placed on the console together with the ECL
regulator, as shown in the photo to the right, so that reading of the
meter can be done without removing the insulation cover.
Safety valve(s)
Always lead the blow-off pipe from the safety valve to a drain in
accordance with applicable legislation.
The insulation cover is be prepared for this and blow-off pipe from the
safety valves are led through the slit in the insulating cover as shown
in the photo to the right.
Meter
display
A
B
Expansion tank connection.
The substation is prepared for connection of an expansion tank
and is made with a flat-sealing screw connection 3/4”
Montage- und Betriebsanleitung / User manual
VXe SLS
