Description of the device
4 — English
Reflexomat Basic — 20.09.2020 - Rev. A
4
Description of the device
4.1
Description
•
One "RG" primary vessel as an expansion vessel with up to 600 litres
nominal volume.
–
The RS 90 / 1 compact control unit is factory-installed on the primary
vessel.
–
All electric and air side connections between control unit and
expansion vessel are pre-installed.
•
The connection of "RF" secondary vessels to the primary vessel is available
as an option
4.2
Overview
1
"SV" safety valve
3
"RF" secondary vessel
2
"RS 90 / 1" control unit
•
Compressor
•
Controller
4
"RG" primary vessel
5
"LIS" level sensor
6
"EC" expansion line
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
Meaning
Type
Device name
Serial No.
Serial number
min. / max. allowable pressure P
Minimum/maximum permissible
pressure
max. continuous operating
temperature
Maximum temperature for continuous
operation
min. / max. allowable temperature
/ flow temperature TS
Minimum / maximum permissible
temperature / TS flow temperature
Year built
Year of manufacture
min. operating pressure set up on
shop floor
Factory set minimum operating
pressure
at site
Set minimum operating pressure
max. pressure saftey valve
factory - aline
Factory set actuating pressure of the
safety valve
at site
Set actuating pressure of the safety
valve
4.3.2
Type code
No.
Reflexomat Basic type key
1
Control unit designation
Reflexomat RS 90/ 1
2
Number of compressors
1
2
4.4
Function
1
Water make-up using “Fillvalve”, “Fillcontrol” or “Servitec”
2
Control unit
3
Primary vessel as expansion vessel
4
Secondary vessel as additional expansion vessel
WC Make-up pipe
PIS Pressure sensor
SV
Safety valve
PV Solenoid valve
LIS Pressure load cell
EC
Expansion pipe
Expansion vessels
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 primary vessel
is connected to the control unit on the air side and connected hydraulically to
the system circuit. Pressure relief occurs on the air side by means of the "SV"
safety valves of the vessels.
Control unit
The control unit comprises a "CO" compressor and the "Reflex Control Basic"
controller. Via the primary vessel, the pressure is measured with the "PIS"
pressure sensor and the water level with the "LIS" pressure load cell and the
values then displayed in the controller display.
Pressurisation
•
If the water is heated, it expands and the pressure increases in the system
circuit. If the pressure set at the controller is exceeded, the "PV" solenoid
valve opens and discharges air from the primary vessel. Water flows from
the system into the primary vessel and the pressure drops in the system
circuit until the pressure in the system circuit and the primary vessel is the
same.
•
The pressure in the system circuit drops when the water cools. When the
pressure drops below the set value, the "CO" compressor cuts in and
delivers compressed air into the primary vessel. This displaces water out of
the primary vessel into the system circuit. The pressure in the system
circuit rises.
Make-up
The addition of more water is controlled via the controller. The "LIS" pressure
load cell determines the water level and sends this value to the controller. This
controls an external make-up. Water is directly added into the system circuit in a
controlled manner by monitoring the make-up time and the make-up cycles.
If the water level in the primary vessel falls below minimum, a fault message is
output from the controller and shown in the display.
