Minimum Clearances - Viessmann VITODENS 242-F Technical Manual

Design information
Rated heat input
kW
30.5
34.9
Sizing recommendation, gas flow switch
In supply areas with H
IB
pliant with category I , determine a fictitious rated heat input. This
2N
fictitious rated heat input results from the rated heat input (Q
appliance, multiplied by a factor of 1.23 (ratio H
fictitious rated heat input to select the gas flow switch and plan the
pipework to TRGI 2008 [or local regulations].

Minimum clearances

Space required in front of the Vitodens for maintenance:
min. 700 mm
6
VIESMANN
48
(cont.)
Gas type Connection values
m 3
Natural gas E 3.23
Natural gas LL 3.75
LPG
Natural gas E 3.86
Natural gas LL 4.49
LPG
below 8.6 kWh/m 3 and gas appliances com-
8.6/7.0). Use this
IB
kg/h
/h
2.38
2.85
Rated heating output
kW
11 to 19
) of the
NB
26
35
The sizing recommendation for the gas flow switch does not waive the
requirement for sizing the pipework correctly.
No maintenance clearances are required to the left or right of the
Vitodens.
Nominal diameter of the gas supply
pipe
DN 15 DN 20 DN 25
Max. possible pipe length in m
4 21 68
– 16 53
23 100 –
4 21 68
– 16 53
23 100 –
Gas flow switch
for natural gas
GS 4
GS 6
GS 10
VITODENS