Instructions for installation and use
VXe Solo HT
© Danfoss | Produced by Danfoss Redan A/S | 2023.01 | 15
AQ440953137531en-010102
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 ap-
plicable 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
system 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 instruc-
tions in this manual.
For fully insulated systems
The insulation front panel on the VXe Solo HT substations can be
removed without 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 insulation 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 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.
Heat meter, fitting pieces.
The substation is equipped with fitting pieces for heat meter on
the district heating return line. (Measurement: 3/4” x 110 mm).
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 insula-
tion 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
