What you should know about your heating system
2
Logamatic 4321/4322 - Technical specifications are subject to change without prior notice.
9
Why do I need a timer?
Advanced heating systems are equipped with a timer to
save energy. With a timer, you can set up an automatic
changeover between two different room temperatures,
subject to time. This enables you to set a reduced room
temperature at night, or at other times when a reduced
temperature is sufficient, while operating your heating
system with the standard room temperature during the
day.
You have four options for reducing the room
temperature via the control panel. Your heating
contractor will select one according to your requirements
and will set it up for you:
–
Total shutdown (no room temperature control)
–
Rreduced room temperature (a reduced room
temperature will be maintained)
–
Change between total shutdown and reduced
heating subject to room temperature
–
Change between total shutdown and reduced
heating subject to outdoor temperature
With
total shutdown
of the heating system, no pumps
or other system components are operated. Heating only
starts up again if the heating system is subject to a risk
of frost.
Heating with reduced room temperature
(night mode)
only differs from standard heating mode (day mode)
through a lower supply temperature.
When
changing from total shutdown to reduced
heating
, the boiler will remain shut down as long as the
room temperature exceeds a set level
. This function
is only available if a room temperature sensor is
installed.
When
changing from total shutdown to reduced
heating based on outdoor temperature
, the boiler will
remain shut down as long as the
outdoor temperature
exceeds a preset level
.
What are heating zones?
A heating zone describes the circuit made by the boiler
water from the boiler via the radiators and back again
(
Æ
Fig 1, page 6). A simple heating zone comprises a
heat generator, a supply pipe, a radiator and a return
pipe. A pump installed in the piping circulates the boiler
water.
Several heating zones may be connected to one boiler,
for example, one heating zone for supplying radiators
and another zone for supplying a radiant floor heating
system. In this case, the radiators are supplied at a
higher supply temperature than the radiant floor
heating system.
The supply of different supply temperatures to different
heating zones can be achieved by e.g. installing a
3-way mixing valve between the heat source and the
radiant floor heating system.
Using an additional temperature sensor in the supply of
the heating zone to be supplied, sufficient cold return
water is mixed via a 3-way mixing valve into the hot flow
water, to achieve the desired lower temperature. It is
important to note that heating zones with 3-way mixing
valves require an additional pump. This pump enables
the second heating zone to be operated independently
of the first heating zone.
