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Summary of Contents for Computherm Q4Z
- Page 1 COMPUTHERM Q4Z zone controller (for controlling 1 to 4 heating zones) Operating Instructions...
- Page 2 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 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, controls the boiler and gives commands to open/close the heating zone valves (max.
- 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.
- Page 4 command of the thermostats, 230V AC voltage appears on the connection points of the zone valves associated with the thermostats, and the zone valves/pumps connected to these connection points open/start. For ease of use, the connection points associated with the same zone have the same color. The first and second zones, beside their regular connection points, also have a joint connection point for a zone valve/ pump (Z1-2).
- Page 5 which do not have a separate thermostat, do not need heating at all times but need heating when any of the first two zones heat. The third and fourth zones, similarly to the first and second zones, have a joint connection point for a zone valve/pump (Z3-4), too.
- Page 6 connection point is suitable to control the heating in such rooms (e.g. the hall or the bathroom), which do not have a separate thermostat, do not need heating at all times but need heating when any of the four zones heat. This connection point is also suitable for controlling a central circulating pump, which starts whenever any of the heating zones starts.
- Page 7 this starts the boiler. This connection point is also equipped with a delaying circuit. In case of using an electro-thermal zone valve that operates slowly and all the zones are closed when the boiler is inactive, then the boiler should be started with a delay in order to protect the pump of the boiler.
- Page 8 connection points controlling the boiler connection points of the heating zones connection points of the thermostats “DELAY” jumper connection points for power supply...
- Page 9 4. insTalling The zone conTroller and puTTing iT inTo operaTion To install the zone controller, detach its rear panel from its front panel by loosening the screws at the bottom of the cover. By this, the connection points of the thermostats, the zone valves/pumps, the boiler and the power supply are unblocked.
- Page 10 AC, the maximum loadability of the zones is 1A (0,5A inductive load) per zone. This information should be considered at the installation. COMPUTHERM The size of the connection points of the zone controller allow at most 2 or 3 devices to be connected in parallel to any heating zone.
- Page 11 After connecting all the wires to the zone controller, mount its rear panel on the wall with the screws provided. In case of using an electro-thermal zone valve that operates slowly and all the zones are closed when the boiler is inactive, then the boiler should be started with a delay in order to protect the pump of the boiler.
- Page 12 5. using The zone conTroller After installing the device, putting it into operation and turning it on with its switch (position ON), it is ready for operation, which is indicated by the illuminated state of the red LED light with sign “POWER” and the blue LED light with sign “A/M”...
- Page 13 Pressing the “A/M” button separates the thermostats from the zone controller. In this case, the boiler and the heating zones can only be started manually, without any temperature inspection. The continuously illuminated blue LED indicates automatic (thermostat-controlled) mode, while its switched off state indicates manual mode. This function might be needed for example, if the battery has run down in one of the thermostats.
- Page 14 by pressing the “RESET” button, the device quits manual control and resumes automatic (thermostat-controlled) operation, which is indicated by the illuminated blue LED light.
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Page 15: Technical Data
Technical daTa Any switch-operated room thermostat can be connected to the zone controller, whose output relay has a loadability of 230V AC, min. 1A (0.5A inductive load). — Supply voltage: 230V AC, 50Hz — Standby power consumption: 0.5W — Voltage of the zone outputs: 230V AC, 50Hz —... - Page 16 The COMPUTHERM Q4Z type zone controller complies with the requirements of standards EU EMC89/336/EEC; LVD 73/23/EEC and 93/68/EEC. Importer: Thermostats4U Email: sales@thermostats4u.co.uk For additional information visit: thermostats4U.co.uk For better reading download this Operating Instruction from our website!
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