Viessmann VITOCELL 100-W - General Formulas for Calculating the Cylinder Loading System; Calculation Based on Water Volume; Calculation Based on Heat Volume

5.3 General formulas for calculating the cylinder loading system
Calculation based on water volume
With reference to EN 12831, Q = Φ is used for heat volume and
² = L for the heating output (continuous output) instead of the val-
ues previously used in DIN 4701.
L · t
V
D
=
c · ΔT
in l
V
ttl.
= V
D
+ V
cyl.
in l
= n
Z
· ´ · t in l
Calculation based on heat volume
With reference to EN 12831, Q = Φ is used for heat volume and
² = L for the heating output (continuous output) instead of the val-
ues previously used in DIN 4701.
Φ
D
= L · t in kWh
Φ
ttl.
= V
ttl.
· ΔT · c in kWh
= Φ
cyl.
+ Φ
D
in kWh
= V
ttl.
· ΔT · c = Φ
cyl.
+ Φ
D
Φ
cyl.
= V
cyl.
· c · (T
a
– T
e
) in kWh
Cylinder loading systems — Vitocell 100-L with Vitotrans 222
(cont.)
DHW heating
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