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•
Align the primary vessel, 7.3.1 "Positioning", 34.
•
Connect the connection set (2) and (3) with the screw fittings and gaskets
to the connections at the lower vessel flange of the primary vessel.
–
Ensure that you connect the connection set for the overflow line to
the connection (2) below the label (1). If you interchange the
connections, there is a risk that the pump may run dry.
–
For vessels up to 740 mm Ø:
•
Connect the connection set (2) and (3) to the two free 1-inch
barrel nipples at the vessel flange.
•
Connect the connection set (4) of the secondary vessel to the T-
joint at the outlet of the vessel flange.
–
For vessels from 1000 mm Ø:
•
Connect the connection set (2) to the 1-inch barrel nipple of
the vessel flange.
•
Connect the connection sets (3) and (4) to the T-joint at the 1-
inch barrel nipple of the vessel flange.
Note!
If necessary, install the supplied connection set (4) at the optional
secondary vessel. Connect the connection set (4) with a user-supplied
flexible pipeline to the primary vessel.
Note!
The safety valve at the hydraulic system of the Variomat acts to protect
the vessel. It is not for protection of the connected system. The exhaust
line must be routed so that there is no danger during blowing off.
7.3.4
Hydraulic connection
7.3.4.1
Connection to the facility system
CAUTION
Hot water vapour can cause burns to skin and eyes.
Hot steam can escape from the safety valve. The hot steam will cause
scalding of the skin and eyes.
•
Ensure that the blow-off line of the safety valve is routed so that
injuries are not possible.
ATTENTION
Damage due to improper installation
Additional device stresses may arise due to the connection of pipes or system
equipment.
•
Pipelines must be connected so there are no residual forces and
torques and must be routed so they are free from vibrations.
•
If necessary, provide support structures for the pipelines or equipment.
•
If you have any questions, please contact Reflex After Sales & Service.
Note!
Each connection on the water side must be provided with a cap valve
and a draining device.
Connection to the primary tank
The control unit is positioned to the primary tank as determined by the selected
installation variant, and is connected to the tank using its connection set.
The connections to the system are identified by adhesive labels on the control
unit:
Pumpen
Überströmung
Zur Anlage
Zur Anlage
Pump to system
Overflow valve to
connection
system connection
Connection to the system
1
2
3
4
5
6
7
EC
LIS
WC
MAG
If required, install a diaphragm expansion tank MAG ≥ 35 litres (Reflex N, for
example). It reduces the switching frequency and can be also used in the
individual protection of the heat generators. According to DIN / EN 12828, the
installation of valves between the device and the heat generator is required for
heating systems. Otherwise secure locking mechanisms must be fitted.
"EC" expansion lines
Because of the degassing function, you must install two "EC" expansion lines.
•
•
The "DN" nominal connection diameter for the "EC" expansion lines must be
designed for the "P
Calculation P
The "DN" nominal connection diameter applies to an expansion line length of up
to 10 m. Beyond this length, select the next larger dimension. Integrate with the
"V" main flow volume of the system. Viewed in the system flow direction, the
gas-rich expansion line must be connected upstream of the expansion line
transporting the degassed water.
Ensure that particulate dirt cannot enter and thus creating an overload of the
"ST" dirt trap. Connect the "EC" expansion lines according to the following
installation variants.
Nachspeisung
Zum Behälter
Type
Make-up to system
VS 1
connection
VS 1
7.3.4.2
If you don't connect the automatic water make-up, you must close the
connection of the "WC" make-up line with a R ½ " blind plug.
•
•
Variomat Basic — 09.09.2022-Rev. C
Heat generator
Optional equipment and accessories
Secondary tank
Reflex rapid-action coupling R 1 x 1
Primary tank
Primary tank connection set
Typical representation of the control unit
Degassing line
•
Gas-rich water from the system
•
Degassed water to the system
"LIS" level sensor
Make-up pipe
Pressure expansion tank
One line to the system for the gas-rich water.
One line to the system for the degassed water.
" minimum operating pressure.
0
8.2 "Variomat switching points", 39.
0,
Minimum operating pressure p
0,5 - 2,0
≥ 2,0
Note!
The water temperature at the connection point of the "EC" expansion
lines must be in the range of 0 °C to 70 °C. The use of auxiliary tanks
does not increase the range of use. Because the thermal protection is
not ensured due to the flow during the degassing phase.
Make-up line
Prevent a potential device fault by ensuring manual water make-up.
Install at least one "ST" dirt trap with a mesh size ≤ 0.25 mm close
upstream to the make-up solenoid valve.
–
Install a short line between the "ST" dirt trap and the solenoid valve.
Installation
(bar)
DN25
DN32
0
X
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X
English — 35
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