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7.4.1.2
Using a district heating substation
1
District heating house substation
2
Primary vessel
3
"MAG" expansion vessel
4
Site-provided make-up unit
5
Control unit
WC
Make-up pipe
PIS
Pressure transducer
WV
Make-up solenoid valve
ST
Dirt trap
EC
Degassing line
•
For gas-rich water from the system.
•
For degassed water into the system.
LIS
Level sensor
District heating water is particularly suitable as make-up water.
•
Water treatment is not necessary.
•
Use an "ST" dirt trap with a mesh size ≥ 0.25 mm for the make-up.
Note!
You require the approval of the district heating water supplier.
7.4.1.3
Use in a system with central return flow admixture
1
Heat generator
2
"MAG" expansion vessel
3
Primary vessel
4
Control unit
5
Reflex Fillsoft
6
Fillset Impuls
WC
Make-up pipe
PIS
Pressure transducer
WV
Make-up solenoid valve
ST
Dirt trap
EC
LIS
Make-up with water via a softening system.
•
Always integrate the device in the "V" main volume flow to ensure
degassing the system water. It is the system side in systems with central
return flow admixture or hydraulic switching points. The vessel of the heat
generator must be fitted with an individual protective device.
•
When using Reflex Fillsoft softening systems, always install the Fillset
Impulse.
–
7.5
Risk of serious injury or death due to electric shock.
If live parts are touched, there is risk of life-threatening injuries.
•
•
•
The following descriptions apply to standard systems and are limited to the
necessary user-provided connections.
1.
Disconnect the system from the power source and secure it against
unintentional reactivation.
2.
Remove the cover.
parts of the device's circuit board may still be live with 230 V even after the
device has been physically isolated from the power supply by pulling out of
the mains plug. Before you remove the covers, completely isolate the
device controller from the power supply. Verify that the main circuit board
is voltage-free.
3.
Install a screwed cable gland suitable for the respective cable. M16 or M20,
for example.
4.
Thread all cables to be connected through the cable gland.
5.
Connect all cables as shown in the terminal diagram.
–
6.
Install the cover.
7.
Connect the mains plug to the 230 V power supply.
8.
Activate the system.
The electrical connection is completed.
7.5.1
"L" fuse for electronics and
1
solenoid valves
2
"N" fuse for solenoid valves
Variomat Basic — 09.09.2022-Rev. C
Degassing line
•
For gas-rich water from the system.
•
For degassed water into the system.
Level sensor
The device controller evaluates the make-up quantities and signals a
required replacement of the softening cartridges.
Note!
The quality of the make-up water must comply with the applicable
standards such as VDI 2035.
Electrical connection
DANGER
Ensure that the supply cable to the device is disconnected and secured
against being switched back on.
Ensure that the system is secured and cannot be reactivated by other
persons.
Ensure that installation work for the electric connection of the device is
carried out by an electrician, and in compliance with electrical locally
applicable electrical engineering regulations.
DANGER Risk of serious injury or death due to electric shock. Some
For installer supplied fusing, comply with the connected loads of the
device , 6 "Technical data", 32.
Terminal diagram
Installation
9
Digital inputs
•
Water meter
•
Low water
10 Motor ball valve (energy
connection)
English — 37
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