Preparing For Installation; Installation Information; System Example 1 - Viessmann VITOSOLIC 100 Installation And Service Instructions Manual

Preparing for installation

Installation information

Danger
Subject to system configuration,
DHW temperatures above 60 °C
can occur. DHW with tempera-
tures in excess of 60 °C can result
in scalding.

System example 1

DHW heating with dual-mode DHW cylinder
Main components
■ Viessmann solar collectors
■ DHW cylinders Vitocell 100-B or
Vitocell 300-B
■ Vitosolic 100, type SD1
■ Solar-Divicon
■ Wall mounted oil/gas boiler or oil/gas
boiler
Function description
DHW heating with solar energy
Solar circuit pump R1 eE starts and
DHW cylinder qP is heated up if the tem-
perature differential between collector
temperature sensor S1 eQ and cylinder
temperature sensor S2 qQ exceeds the
starting temperature differential DT E.
Solar circuit pump R1 eE is stopped in
accordance with the following criteria:
■ The actual temperature falls below the
shutdown temperature differential
DT A.
■ Exceeding the electronic temperature
limit (max. 90°C) of control unit eZ
■ Reaching the temperature selected at
high limit safety cut-out qW (if installed)
6
To limit the temperature to 60 °C,
install mixing equipment, e.g. a
thermostatically controlled mix-
ing valve (accessory). Install a
mixer tap as anti-scalding device
at the draw-off point.
Auxiliary function for DHW heating
The requirements for the auxiliary func-
tion are achieved through circulation
pump R2 qT.
Suppression of DHW cylinder reheat-
ing by the boiler
Coding address "67" in boiler control unit
2 defaults a third set DHW temperature
(setting range 10 to 95 °C). This value
must be below the first set DHW temper-
ature. DHW cylinder qP will only be
heated by boiler 1 (solar circuit
pump R1 eE runs) if this set value cannot
be achieved by the solar thermal sys-
tem.
DHW heating without solar energy
The upper section of DHW cylinder qP is
heated by boiler 1. The cylinder ther-
mostat with cylinder temperature sen-
sor 3 of boiler control unit 2 regulates
cylinder heating.