Computherm Q4Z Operating Instructions Manual page 3

To control more than 4 zones at a time we recommend using
2 or more COMPUTHERM Q4Z zone controllers. In this case,
the potential-free connection points controlling the boiler (NO
and COM) should be connected to the boiler in parallel.
2. The connecTion poinTs of The zone conTroller,
mosT imporTanT Technical daTa
Each of the 4 heating zones have an associated pair of
connection points; one for a room thermostat and one for
a zone valve/pump. The thermostat of the first zone (T1)
controls the zone valve/pump of the first zone (Z1), the
thermostat of the second zone (T2) controls the zone valve/
pump of the second zone (Z2) etc. Following the heating
3