Computherm Q10Z User manual

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zone controller
(for controlling 1 to 10 heating zones)
COMPUTHERM Q10Z
Operating Instructions

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1. A GENERAL DESCRIPTION OF THE COMPUTHERM
Q10Z ZONE CONTROLLER
Since in the boilers a connector has been installed only for one room ther-
mostat, a zone controller is needed to divide the heating network into zones,
to control zone valves and to operate the boiler from several thermostats. The
zone controllers receives switch signals from room thermostats T1 to T10,
opens zone valve(s) connected to valve outputs VALVE ZONE 1 to ZONE
10, starts pump(s) connected to pump outputs PUMP ZONE 1 to ZONE 10
and to common outputs C1 to C4 and starts heating/cooling devices connec-
ted to output NO-COM.
The COMPUTHERM Q10Z zone controller is able to control 1 to 10 heating
zones regulated by switch mode room thermostats so that various zones can
operate either simultaneously or independently of each other.
Controlling more than 10 zones can be solved by using additional zone
controller COMPUTHERM Q4Z (1 Q4Z zone controller for every 4 zones)
or Q10Z (1 Q10Z zone controller for every ten zones). In this case
potential-free boiler controller outputs (NO-COM) should be connected in
parallel to the heating/cooling devices, while zone outputs operate indepen-
dently of each other.
By means of the COMPUTHERM Q10Z zone controller a heating/cooling
system can be easily divided into zones and in this way heating/cooling of va-
rious rooms can be controlled separately to improve comfort to a great extent.
Besides, dividing the heating/cooling system into zones highly contributes to
the reduction of energy costs because in this way only those rooms will be
heated whenever and wherever it is needed.

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The gure below shows an example of dividing the heating system into zones:
For the sake of energy saving, it is recommended that comfort temperature is
set only in those rooms and in those periods which and when are being used,
because an every temperature reduction of 1 °C results in 6 percent energy
savings during a heating season.
Connection points of the zone controller and the most im-
portant technical information relating thereto.
connector of the control
cable of the front panel
connectors for room
thermostat inputs
connector for remote
controller input
fuse
(15A)
connector for
boiler controller
output
connectors for
common pump
outputs
connectors for
valve outputs connector for
mains cable
connectors for
pump outputs

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All 10 zones have a connection point to a room thermostat, a valve controller
output and a pump controller output. The NO-COM output points of the poten-
tial-free room thermostats should be connected to the thermostat connection
points (T1 to T10) of the zones. Each of the valve outputs (VALVE ZONE 1 to
ZONE 10) has a xed neutral conductor (N), a switched phase (L) and a xed
phase (FL) connection points (to operate some zone valve adjustment motors
a xed phase connection point is also required). Fixed phase connectors are
active only when the main switch of the zone controller is on. Each of the valve
controller outputs (PUMP ZONE 1 to ZONE 10 has a xed neutral conductor
(N), a switched phase (L) and a xed ground (⏚) connection points. For easi-
er installation terminals of the same colour are mounted onto thermostat, zone
valve and pump connectors that belong to various zones.
The zone controller has 4 freely congurable common outputs (C1 to C4)
which have a xed neutral conductor (N), a switched phase (L) and a xed ⏚
ground connection points. Each of these outputs can freely be set to switch on
when one or more predened zones of the zone controller are being switched
on. The process to adjust common outputs can be found in Chapter 4.1.
The zones of the devise have a common potential-free boiler controller output
(NO-COM) which starts the heating/cooling device connected thereto at the
switch-on command of any thermostat.
The zone controller has a remote-control input (REMOTE), with the help of
which the heating/cooling system can easily be made remotely controllable.
For a detailed description of this process please refer to Chapter 4.2.
Mains supply to the device should be connected to connection points neutral
(N) and phase (L) of the mains input of the controller (POWER INPUT). The
zone controller is a non-earthed, double-insulated device whose input earth
connection point (⏚) is exclusively used to secure earth connection points of
the outputs.
A 15 A fuse located in the right upper part of the electrical panel protects the
components of the zone controller against overload. In case of overload the
fuse element melts and the fuse protects the controller component against
overload. If the wire element of the fuse has melted, before using the control-
ler again please check the condition of and loan on the devices connected to
the zone controller, and remove any faulty device or those which can cause
overload then replace the melted fuse.

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2. CONNECTING THE ZONE CONTROLLER AND
PUTTING IT INTO OPERATION
Attention! It is reasonable to locate the zone controller close to the distributor/
collector of the heating system so that it is protected against dust, chemicals,
harmful e󰀨ects of heat and mechanical damages.
Attention! The device should be installed / put into operation by a compe-
tent person! Before putting it into operation, make sure that neither the zone
controller nor the device to be connected to the controller is connected to the
230 V network. Any modication to the device can lead to a risk of an electric
shock or a failure.
Attention! We recommend that you establish the heating system to be reg-
ulated with the COMPUTHERM Q10Z zone controller so that the heating me-
dium can circulate even when all zone valves are in closed position and a
circulating pump is on. This can be done either by a permanently open heating
circuit or installing a by-pass valve.
Attention! The operating voltage of the zone valves and pumps connected to
the zone controller is 230 V, and the maximum loadability of all zone outputs
and the common output of the zone controller is 2 A (0.5 A inductive load). Sin-
ce the loads connected to the valve output and pump control output belonging
to a given zone go through the thermostat of the respective zone, the total
maximum load on the valve output and pump control output belonging to a
given zone must not exceed the maximum loadability of the thermostat of the
respective zone either. Please also make sure that the maximum combined
load on all zone outputs and the common output is 15 A, regardless of indi-
vidual maximum loadabilities of various outputs. The loadability of the boiler
controller output is 16 A (4 A inductive load). We propose to install connecting
cables by taking these parameters into account.
The dimensions of the connectors of the COMPUTHERM Q10Z zone
controller are suitable for receiving cables of maximum 2 – 3 parallel connec-
ted devices (zone valve, pump, etc.). If you intend to connect more devices
(e.g. 4 zone valves) in parallel to a zone output than you have to join the
cables thereof before connection, and connect the common cable to the zone
controller.

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To put the zone controller into operation follow the steps below:
• Loosen the screws on the lower edge of the box of the device and se-
parate the cover plate from the base plate. Then the connectors of the
thermostats, zone valves, pump(s), the boiler and the network cable be-
come accessible.
• Select the location of the zone controller in the vicinity of the boiler (distri-
butor/collector of the heating system, zone valves), and prepare the holes
needed for xing the device in the wall.
• Fix the base plate of the zone controller (its half equipped with cable con-
nectors) to the wall by means of the screws provided.
• Connect the cables of the devices needed for heating control (thermos-
tats, zone valves, pumps and boiler) and the mains cable to the zone
controller.
• Where necessary, break out the easily removable plastic covers of cable
outlets on the lower edge of the box of the zone controller and x the cab-
les with the cable clamps. To do so, rst loosen the screws of the cable
clamps, put the cables into the grooves then replace the cable clamps
in-place.
• Connect the control cable connected to front panel of the zone controller
to the corresponding socket of the back cover then replace the front panel
of the zone controller and x it with the screws on the lower edge of the
box of the device.
• Connect the zone controller to the 230 V network.
3. OPERATION OF THE ZONE CONTROLLER
After making connections, connecting the device to the network and switching
on the network slide switch of the device (ON position), all LEDs of the zone
controller will ash for approx. 2 seconds, and the controller is ready for ope-
ration which is indicated by the continuous light of the green LED labelled with
„POWER” on the front panel of the device.
When the zone controller is on, at the switch-on command of the thermostat
of any zone 230 V AC voltage appears on the valve outputs belonging to the
respective zone, on zone outputs and common output(s) synchronized with
the zone, as a result of which zone valve(s) connected to the outputs open,
and the pump(s) start(s). The room thermostat of the 1st zone (T1) controls
the valve output (VALVE ZONE 1) and pump output (PUMP ZONE 1) of the
1st zone, the room thermostat of the 2nd zone (T2) controls the valve output
(VALVE ZONE 2) and pump output (PUMP ZONE 2) of the 2nd zone, and so
on.

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The zone controller has a common potential-free output (NO-COM) as well,
which normally (when all thermostat connected to the zone controller give
switch-o󰀨 command) is in open position This output will get into closed posi-
tion when at least one thermostat gives a switch-on command, thereby start-
ing the heating/cooling device connected thereto.
For all outputs the continuous light of the respective red LED indicates that
the output is on.
4. SPECIAL FUNCTIONS OF THE ZONE
CONTROLLER
4.1 Adjusting the common outputs
For all four freely congurable common outputs (C1 to C4) you can set the
zones of the zone controller which should be matched with the outputs. When
any of the zones matched with the respective common output switches on
then the 230 V AC voltage appears on the respective output, and as a result
the device (e.g. a pump) connected thereto will switch on. By means of these
common outlets a heating circulating pump can be started which is responsib-
le for circulating heating water in several zones.
In factory settings the common outputs are not matched with any zone. To set
the common outlets follow the steps below:
• Depending on which common outlet you intend to set, push the button
of the zone with the same serial number (e.g. the button that belongs to
zone Z3 in case of common output C3) for 5 seconds. Then the red LED
of the common output starts to ash at 1 second intervals.
• Press the button that belongs to the zones with which you intend to match
the respective common output. The selected state of a given zone is indi-
cated by the continuous light of the corresponding red LED.
• To complete and save setting of a common output wait for approx.
5 seconds until ashing of the red LED belonging to the common output
ends.
By means of the steps described above settings of the common outlets can be
modied at any time. Pressing the „RESET” button the common outputs can
be reset to factory default settings (at the same time all synchronizations will
be deleted). Use a non-conducting thin, pointed object to press the „RESET”
button (e.g. a toothpick).

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4.2 Remote control of the zone controller
The zone controller has a remote-control input (REMOTE), with the help of
which the heating/cooling system can easily be made remotely controllable.
This function has been disabled by a short wire loop at the factory. After the
wire loop has been removed, the remote control of the zone controller can be
easily provided by connecting the NO-COM connection points of an optional
switch mode (potential-free) thermostat to the remote-control input, depend-
ing on the output of the thermostat.
When the output of the thermostat connected to REMOTE connection point
switches on (the NO-COM connection points of the thermostat are being
closed) then the zone controller is functioning normally (in accordance with
thermostats T1 to T10). When the output of the thermostat connected to
REMOTE connection point switches o󰀨, the zone controller disables all of its
outputs and the heating/cooling system stops. During this time the orange
LED labelled REMOTE of the thermostat permanently lights, indicating the
activated REMOTE function. When you connect a remotely controllable ther-
mostat (e.g. a COMPUTHERM Wi-Fi thermostat) to these connection points
then by modifying the set temperature of the thermostat remotely the whole
heating system can be switched to an “away” (e.g. frost-free) temperature
then can be reset to the normal (e.g. comfort) operation.
Attention! When selecting and connecting the REMOTE-control thermostat,
make sure that it bears the theoretical maximum total ampere rating of all
devices connected to the zone controller, because the starting and operating
currents of all controlled zone valves and pumps ows through it.
Attention! The manufacturer assumes no responsibility for any direct or
indirect damages and loss of income occurring while the appliance is
being used.

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─Supply voltage:
─Standby power consumption:
─Voltage of zone outputs and
common outputs:
─Loadability of zone outputs and
common outputs:
─Switchable voltage of the
relay that controls the boiler:
─Switchable current of the relay
that controls the boiler:
─Storage temperature:
─Operating humidity:
─Protection against environmental impacts:
─Dimensions:
─Weight:
TECHNICAL DATA
230 V AC; 50 Hz
max 0.5 W
230 V AC; 50 Hz
2 A (0.5 A inductive load)
Attention! Ensure that the com-
bined load of 2 outputs belong-
ing to a zone does not exceed
the maximum loadability of the
thermostat of the respective zone,
and the combined load of all zone
outputs and the common output is
not more than 15 (4) A.
30 V DC / 250 V AC, 50 Hz
16 A (4 A inductive load)
-10 °C to +40 °C
5% to 90% (non-condensing)
IP 30
385 x 125 x 45.7 mm (L x W x H)
895 g