Functional Description - Danfoss Termix VMTD-F-B Installation Manual

Installation Guide Termix VMTD-F-B

2.0 Functional description

District heating substation for direct heating and
instantaneous domestic hot water.
Application
The Termix VMTD-F-B is a complete solution with built-in water
heater and a differential pressure controlled heatingsystem. Termix
VMTD-F-B is applicable for single and multi-family houses and for
decentralized systems.
District heating (DH)
The substation is prefabricated with a differential pressure
controller, a fitting piece and sensor pockets for insertion of a heat
meter as well as strainer and ball valves.
Heating (HE)
The heating circuit is designed for direct generation of heat.
The differential pressure control sets the optimum operation
conditions for radiator thermostatic valves in order to enable
individual temperature control in each room. In order to enable a
time-depending temperature control program, a zone valve with
actuator and a room thermostat can be included as an option.
Domestic hot water (DHW)
The domestic hot water is prepared in the heat exchanger and the
temperature is regulated with a thermostatic control valve. The
patented sensor accelerator accelerates the closing of the Danfoss
AVTB valve and protects the heat exchanger against overheating
and lime scale formation. The heat exchanger cools the DH water
very efficiently, thereby creating a very good operating economy.
The sensor accelerator and AVTB valve also works as a bypass
keeping the house supply line warm. This shortens the waiting
periods during summer when the heating system is in reduced
operation. The sensor accelerator helps to ensure a stable hot
water temperature regardless of varying loads, flow temperatures
and differential pressure without the need for readjusting the valve.
Danfoss District Energy
VI.CW.C3.02 / LUK40110 DEN-GT 3