Design Information 7.1 Positioning; Connection On The Flue Gas Side; Water Connection; Sizing Of The Heating Water Buffer Cylinder To En 303-5 - Viessmann PYROMAT ECO Technical Manual

Design information
7.1 Positioning
The specified wall clearances are required for installation and main-
tenance work, and must therefore be observed.
Minimum clearances
Wall clearances

7.2 Connection on the flue gas side

The boiler is equipped with a flue gas fan, therefore the combustion
equipment does not require a draught.
The chimney must be designed in the same way as for combustion
7
equipment with a pressure-jet oil or gas burner without draught require-
ment (flue gas temperature at rated load 160 - 200 °C).
To prevent the risk of soot contamination, provision must be made for
an insulated chimney.

7.3 Water connection

Sizing of the heating water buffer cylinder to EN 303-5

Minimal cylinder volume for a typical Q
wood.
V Buffer cylinder capacity in litres
cyl.
Q Rated heating output in kW
N
44
a
c
with T × Q for dry beech
H B N
Pyromat 35 – 65
ECO...
a mm ≥ 200 ≥ 400
b mm 600
c mm 600
d mm 800
Note
If an oil burner is used on the boiler, dimension a is increased if the
burner is fitted on the left, or dimension c if the burner is fitted on the
right.
Siting
The following points must be observed for siting:
■ Avoid air contamination by halogenated hydrocarbons (e.g. as con-
tained in sprays, paints, solvents and cleaning agents)
■ Avoid very dusty conditions
■ Avoid high levels of humidity
■ Prevent frost and ensure good ventilation
The route from the flue gas fan to the chimney should be as short as
possible. 90° bends should be avoided wherever possible.
Flue pipes more than 1 m long should be insulated.
The chimney should be connected rising at an angle of 30 - 45°. The
flue pipe, including inlet to the chimney, must be gas-tight.
61 81 101
≥ 400 ≥ 400 ≥ 400
730 730 730
800 800 800
800 800 800
PYROMAT ECO
151
730
800
800