Reflex Variomat VS 1-1/140 Originalbetriebsanleitung Seite 29

4 Description of the device
4.1 Description
The Variomat VS 1-1/140 and VS 1-2/140 is a pump-controlled pressure
maintaining, make-up and degassing station for heating and cooling water
systems. The Variomat is essentially a controller with pumps and at least one
expansion tank. The expansion tank is fitted with a diaphragm to divide the tank
into an air space and a water space. preventing the ingress of atmospheric
oxygen into the expansion water.
The Variomat VS 1-1/140 and VS 1-2/140 provides the following safety features:
• Optimisation of all pressure maintaining, degassing and make-up
processes.
– No direct intake of air thanks to a regulation of the pressure
maintenance with automatic make-up.
– No circulation issues caused by free bubbles in the circuit water.
– Reduced corrosion damage due to oxygen removal from fill and
make-up water.
4.2 Overview
Variomat with one pump (VS 1-1/140) Variomat with two pumps (VS 1-
1 Main switch
2 Control unit
• Connecting unit for
pump(s)
• Operating unit for
"Reflex Control Touch"
controller
3 "VE" equalisation elbow
4.3 Identification
4.3.1 Nameplate
The nameplate provides information about the manufacturer, the year of
manufacture, the manufacturing number and the technical data.
Information on the type plate
Type
Serial No.
min. / max. allowable pressure P
2/140)
4 Degassing valve "DV"
5 "VF" secondary vessel
6 "VF" primary vessel
7 Feed and drain cock "FD"
8 "LIS" level sensor
Meaning
Device name
Serial number
Minimum/maximum permissible
pressure
Variomat 140 — 25.09.2020 - Rev. A
Information on the type plate
max. continuous operating
temperature
min. / max. allowable temperature
/ flow temperature TS
Year built
min. operating pressure set up on
shop floor
at site
max. pressure saftey valve
factory - aline
at site
4.3.2 Type code
No.
Control unit
1
designation
2 Number of pumps
Variomat VS 1- 1 VG 500 l, VF 500 l
3 "VG" primary vessel
4 Nominal volume
"VF" secondary
5
vessel
6 Nominal volume
4.4 Function
1 Heating system
2 "MAG" expansion vessel
3 Reflex Fillset Impulse
4 Control unit
5 Hydraulic inlets
6 Primary vessel air space
Secondary vessel air
7
space
ST Dirt trap
FQIRA+ Contact water meter
WC Make-up pipe
Expansion vessel
One primary vessel and multiple optional secondary vessels may be connected. A
membrane separates the vessels into an air and a water space, preventing the
penetration of atmospheric oxygen into the expansion water. The "VE" line
connects the air space with the atmosphere. The primary vessel is hydraulically
flexibly connected to the control unit. The function of the "LIS" level measuring
using a pressure pick-up is thus ensured.
Description of the device
Meaning
Maximum temperature for continuous
operation
Minimum / maximum permissible
temperature / TS flow temperature
Year of manufacture
Factory set minimum operating
pressure
Set minimum operating pressure
Factory set actuating pressure of the
safety valve
Set actuating pressure of the safety
valve
Type code (example)
1 2 3 4 5 6
WV Make-up valve
PIS Pressure sensor
PV Overflow valve (motor ball
valve)
PU Pump (pressurisation)
SV Safety valve
EC Expansion pipe
FD Feed and drain cock
LIS Pressure load cell
DV Degassing valve
VE Ventilation
English — 29