System Example 3 - Viessmann VITOSOLIC 200 Installation And Service Instructions Manual

System example 2
In conjunction with a wall mounted oil/gas boiler
Codes required at the boiler and heating circuit control unit
Code
53:3
5b:1

System example 3

DHW heating with two mono-mode DHW cylinders
Main components
■ Viessmann solar collectors
■ 2 DHW cylinders Vitocell 100-V or
Vitocell 300-V
■ Vitosolic 200
■ Solar-Divicon
■ Wall mounted oil/gas boiler or oil/gas
boiler
Function description
DHW heating with solar energy
Solar circuit pump R1 eE is switched on
and DHW cylinder 1 qP is heated up if
the temperature differential between col-
lector temperature sensor S1 eQ and
cylinder temperature sensor S2 qQ is
greater than the start temperature differ-
ential ΔTon.
Solar circuit pump R1 eE is stopped in
accordance with the following criteria:
(cont.)
Function
System without DHW circulation pump:
The circulation pump for cylinder heating 4 is connected to
output sK of internal extension H1 or H2
Internal diverter valve without function
(DHW cylinder connected downstream of the low loss
header)
■ Actual temperature dropping below
the stop temperature differential ΔToff
■ Exceeding the electronic temperature
limit of control unit eZ (max. 90 °C)
■ Reaching the temperature selected at
high limit safety cut-out qW (if installed)
Transfer pump R5/R6 qT is started in
accordance with the following criteria:
■ The temperature differential between
sensor S5 qZ and sensor S6 qU is
greater than start temperature differ-
ential ΔT6on
■ Additional function for DHW heating is
enabled
The water heated in DHW cylinder 1 qP
is transferred to DHW cylinder 2 qI. This
way, DHW cylinder 2 qI is also heated
by solar energy.
Transfer pump R5/R6 qT stops when the
actual temperature falls below stop tem-
perature differential ΔT6off or if the addi-
tional function stops.
DHW circulation pump qE (if installed)
for DHW cylinder 2 qI is controlled by
boiler control unit 2.
System examples
21