Description of the device
Variomat Touch — 09.2020 - Rev. A
Risk of injury due to pressurised liquid
If installation, removal or maintenance work is not carried out correctly, there
is a risk of burns and other injuries at the connection points, if pressurised
hot water or hot steam suddenly escapes.
• Ensure proper installation, removal or maintenance work.
• Ensure that the system is de-pressurised before performing installation,
removal or maintenance work at the connection points.
Risk of injury due to heavy weight
The devices are heavy. Consequently, there is a risk of physical injury and
accidents.
• Use suitable lifting equipment for transportation and installation.
4 Description of the device
4.1 Description
The Variomat with touch control 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 with touch control 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 touch control and two
pumps
Variomat with touch control and one
pump
Control unit
• Pump(s)
• "Reflex Control Touch"
controller
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
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
min. operating pressure set up on
shop floor
Factory set minimum operating
pressure
Set minimum operating pressure
max. pressure saftey valve
factory - aline
Factory set actuating pressure of the
safety valve
Set actuating pressure of the safety
valve