Solar Control; Solar Control Units; Solar Control Module Sm1 - Viessmann VITOSOL 200-FM SV2F Design Manual

Solar System Design Guide

Solar Control Units

Solar control module, type SM1
An external extension module for
the Viessmann Vitotronic control
based on a wall mountable
casing.
– Electronic temperature
differential control for dual
mode DHW heating and central
heating backup from solar
collectors in conjunction with
a Viessmann boiler
– Control and display via the
Vitotronic boiler control unit

Solar Control Module SM1

SCU 124 and 224
Electronic temperature differential
controller for systems with dual
mode DHW heating with solar
collectors and boilers
Functions
■ With output statement and diagnostic system.
■ Operation and display via the Viessmann Vitotronic
■ Switching the solar circuit pump.
■ Heating of two consumers via a collector array.
■ Second temperature differential controller.
■ Thermostat function for reheating or utilizing excess heat.
■ Suppression of DHW tank reheating by the boiler,
■ Suppression of reheating for central heating by the heat
■ Heat-up of the solar preheating stage for 79 USG
■ Collector safety shutdown.
■ Electronic temperature limitation in the DHW tank.
■ Order extra immersion temperature sensors, if the
SCU 345
Electronic temperature differential controller
for up to three consumers for the following
systems with solar collectors and boilers:
– Dual mode DHW heating with dual mode
DHW tanks or several tanks
– Dual mode DHW and swimming pool
heating
– Dual mode DHW heating and central
heating backup
– Industrial/commercial heating systems
boiler control unit.
subject to solar yield.
source in the case of central heating backup.
(300 L) or 119 USG (450 L) dual coil DHW tanks.
following functions are required:
■ For DHW circulation diversion in systems with two
DHW tanks.
■ For return changeover between the heat generator
and the heating water buffer tank.
■ For heating additional thermal loads

Solar Control

17