Computherm Q4Z Operating Instructions Manual page 3

1. GENERAL DESCRIPTION OF THE ZONE CONTROLLER
As the boilers usually have only one connection point for thermostats, a zone
controller is needed in order to divide the heating / cooling system into zones, to
control the zone valves and to control the boiler from more than one thermostat.
The zone controller receives switching signals from the thermostats (T1; T2;
T3; T4), controls the boiler (NO - COM) and gives commands to open/close the
heating zone valves (Z1; Z2; Z3; Z4, Z1-2; Z3- 4; Z1- 4) associated with the
thermostats.
The COMPUTHERM Q4Z zone controllers can control 1 to 4 heating / cooling
zones, which are regulated 1-4 switch-operated thermostats. The zones can
operate independently from each other or, in case of need, all zones can operate
at the same time.
To control more than 4 zones at a time we recommend using 2 or more
COMPUTHERM Q4Z zone controllers (1 zone controller needed per 4 zones). In
this case, the potential-free connection points controlling the boiler (NO - COM)
should be connected to the heater / cooler device in parallel.
The COMPUTHERM Q4Z zone control ler provides the possibility for the
thermostats to also control a pump or a zone valve in addition to starting the
heater or cooler. This way it is easy to divide a he ating / cooling system into
zones, thanks to which the heating / cooling of each room can be controlled se-
parately, thus greatly increasing comfort.
Furthermore, the zoning of the heating / cooling system will greatly contribute to
the reduction of energy costs, as due to this only those rooms will be heated /
cooled at any time where it is required.
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