Hydraulic Connection - Viessmann VITODENS 200-W Technical Manual

Design information
Condensate lifting system
Part no. 7374 796
Automatic condensate lifting system for condensate with a pH value
≥ 2.7 from oil and gas condensing boilers.
Components:
■ Condensate container 0.5 l
■ Shaftless permanent magnet ball motor pump
■ Control unit for pump operation, display of operating conditions and
fault messages
■ 2 m long power cable with plug
■ Two 7 24 mm connection apertures for condensate inlet
The standard delivery comprises:
■ 6 m long drain hose 7 14 x 2 mm
■ Non-return valve
A B
168
A Condensate inlet
B Condensate inlet with drain plug
C Condensate drain

4.3 Hydraulic connection

General information
System design
Viessmann condensing boilers can generally be installed in any pum-
ped hot water heating system (sealed unvented system).
Connection sets with an integral circulation pump are available as
accessories.
Minimum system pressure 1.0 bar.
The boiler water temperature is limited to 82 ºC.
To keep distribution losses as low as possible, we recommend sizing
the heat distribution system for a maximum flow temperature of
70 °C.
Chemical anti-corrosion agents
Corrosion is generally avoided in correctly installed and operated
sealed unvented heating systems.
Never use chemical anti-corrosion additives.
VITODENS 200-W
(cont.)
C
Specification
Rated voltage
Rated frequency
Power consumption
IP rating
Protection class
Permissible medium temperature
Max. head
Max. capacity
Zero volt contact
Some manufacturers of plastic pipes recommend the use of chemical
additives. In such cases, only use anti-corrosion agents offered by the
heating trade that have been approved for boilers with DHW heating
via single-walled heat exchangers (instantaneous water heater or
DHW cylinder).
For this, observe the VDI Directive 2035 [or local regulations].
Heating circuits
For heating systems with plastic pipes, we recommend the use of
impermeable pipes to prevent the diffusion of oxygen through the pipe
walls.
Provide system separation in heating systems with plastic pipes (DIN
4726) that are permeable to oxygen. We supply a separate heat
exchanger for this purpose.
Install a sludge separator in underfloor heating systems and systems
with a large water content; see the Viessmann Vitoset pricelist.
230 V~
50 Hz
20 W
IP 44
F
+60 °C
45 kPa
450 l/h
N/C, breaking capacity
230 VA
VIESMANN
43
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