Transcript
Termix VMTD-F-Q Direct substation for flats, single and multi-family houses with up to 7 apartments District heating substation for direct heating and instantaneous domestic hot water with a self-acting thermostatic/flow controller. Designed for wall-mounting. Application The Termix VMTD-F-Q is a complete solution with built-in water heater and a differential pressure controlled heating system. Termix VMTD-F-Q 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 pocket 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 controller 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
VL.KS.T1.02 © Danfoss 11/2007
temperature is controlled by a selfacting thermostatic control valve that controls the DHW preparation by using a flow-compensation and a thermostatic principle. The rapid closing of the control valve protects the heat exchanger against over heating and lime scale formation. The control valve ensures a stable hot water temperature by varying loads, flow temperatures and differential pressure without the need for readjusting the valve. The heat exchanger cools the district heating water very efficiently, thereby creating a very good operating economy. The control valve also works as a bypass keeping the house supply line at 35 °C during standstill. This shortens the waiting periods during summer when the heating system is in reduced operation.
Construction All pipes are made of stainless steel. The connections are made by nuts and gaskets. It is recommended to mount a strainer with a mesh size of 0.6 mm on the cold water supply. The Termix VMTD-F-Q can be delivered with white-lacquered steel cover in modern design.
Options The Termix VMTD-F-Q can be supplied with built-in non-return valve and safety valve mounted in the cold water supply. It can also be supplied with a thermostatic circulation valve.
• Minimum space required for installation
FEATURES AND BENEFITS • Substation for DH and decentralized systems • Direct heating and DHW temperature regulation with a thermostatic control valve • Capacity: 33 - 80 kW for DHW • DHW in sufficient quantity • Operates independently of differential pressure and flow temperature • Pipes and plate heat exchanger made of stainless steel • Minimized risk of lime scale and bacteria formation
Termix VMTD-F-Q Circuit diagram - example B 8 9 14 31 32 41
Plate heat exchanger, DHW Flow-comp. thermostatic valve Strainer Sensor pocket, heat meter Differential pressure controller Control valve Fitting piece, heat meter return ¾” x 110 mm 41A Fitting piece, cold water inlet ¾” x 110 mm
DHW
41 A
DCW
B
32
DCW
8
14
DH supply
9
41
DH return
Technical parameters: Nominal pressure: DH supply temperature: DCW static pressure: Brazing material (HEX):
PN 16 Tmax = 120 °C pmin = 1,0 bar Copper
Weight incl. cover:
20 kg (incl. packing)
Cover:
White-lacquered steel sheet
Dimensions (mm): Without cover (including ball valves): H 640 x W 505 x D 150 With cover (built-in wall variant): H 830 x W 540 x D 150 With cover (mounted on wall variant): H 800 x W 540 x D 190
HE supply
HE return
31
Connections: 1 District heating (DH) supply 2 District heating (DH) return 3 Domestic cold water (DCW) 4 Domestic cold water (DCW) 5 Domestic hot water (DHW) 6 Heating (HE) supply 7 Heating (HE) return
Connections sizes: DH + HE: DCW + DHW:
G ¾” (int. thread) G ¾” (int. thread)
Options: • Mounting rail with ball valves • White-lacquered stainless steel cover (built in) • White-lacquered stainless steel cover (on the wall) • Safety valve and non-return valve (10 bar) • Safety valve with thermostatic circulation set • Thermostatic circulation set • Pressure compensation valve (GTU) • Room thermostat • Zone valve with actuator • Air screw (DH supply) • Return temperature limiter • Connection for circulation • Circulation pump • Thermometer • Ball valves
DHW: Capacity examples Substation type VMTD-1 VMTD-2 VMTD-3 VMTD-4
DHW Capacity kW 33 40 50 58 60 73 70 80
Supply flow Primary °C 60 70 60 70 60 70 60 70
Return flow Primary °C
DCW / DHW °C
20
10/45 10/50 10/45 10/50 10/45 10/50 10/45 10/50
Pressure loss Primary* kPa 30 25 30 35 30
Flow rate Secondary l/min 13,5 14,4 20,5 21,0 25,0 26,3 29,0
* heat meter not included
Gemina Termix A/S · Member of the Danfoss Group · Navervej 15-17 · DK-7451 Sunds · Denmark Tel.: +45 9714 1444 · Fax: +45 9714 1159 ·
[email protected] · www.heating.danfoss.com
VL.KS.T1.02 © Danfoss 11/2007
DH-SMT/PL
