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C-Stat 11-M | C-Stat 17-M
Installation Instructions
Mains Operated Programmable Room Thermostat
Programmable room thermostats are widely recognised as one
of the best ways in which to control central heating. Horstmann
C-Stat programmable room thermostats have a large display
and intuitive user interface, making them easy to set up and use.
C-Stat uses a sophisticated time proportional integral (TPI)
algorithm for accurate temperature control and energy
efficiency. Being mains powered these models won't need the
batteries changing every two years.
Installation and connection should only be carried out by a
suitable qualified person and in accordance with the edition of
the IEE wiring regulation.
Warning: Isolate mains supply before commencing installation.
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Related Manuals for Horstmann C-Stat 11-M
Summary of Contents for Horstmann C-Stat 11-M
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Page 1: Installation Instructions
Mains Operated Programmable Room Thermostat Programmable room thermostats are widely recognised as one of the best ways in which to control central heating. Horstmann C-Stat programmable room thermostats have a large display and intuitive user interface, making them easy to set up and use. - Page 2 Positioning the C-Stat programmable room thermostat The C-Stat should be mounted on an internal wall approximately 1.5 metres from floor level and should be in a position away from draughts, direct heat and sunlight. Ensure that there will be enough space to allow access to the two retaining screws located at the base of the wall plate.
- Page 3 Fitting the wall plate To remove the wall plate from the C-Stat undo the two retaining screws located on the underside, the wall plate should now be easily removed. Once the wall plate has been removed from the packaging please ensure the C-Stat is resealed to prevent damage from dust, debris etc.
- Page 4 Wiring Box Mounting The C-Stat wall plate may be fitted directly on to a single gang steel flush wiring box complying with BS4662, using two M3.5 screws. The C-stat is suitable for mounting on a flat surface only; it must not be positioned on an unearthed metal surface. Electrical Connections All necessary electrical connections should now be made.
- Page 5 Internal wiring diagram These diagrams are schematic and should be used for guidance only. Please ensure that all wiring complies with current IEE regulations CALL 230V MAINS SUPPLY CALL FOR HEAT The C-Stat have voltage free contacts Ÿ For mains voltage switching applications, link terminal L-1 Ÿ...
- Page 6 C-Stat Mains Supply Mains Supply Remove link if Fitted E N L COMBINATION BOILDER TERMINALS C-Stat controlling typical combination boiler installation. For precise termination connection information please refer to the boiler manufactures instructions Mains Supply COOLING LOAD C-Stat wired to control a cooling load. When necessary the C-Stat should be used in conjunction with a contactor.
- Page 7 Programmer CENTRAL WATER HEATING MAINS C-Stat SUPPLY 230V STAT MAINS SUPPLY CALL CALL PUMP & BOILER C-Stat replacing a conventional room thermostat on a fully pumped system with an existing programmer and 3 port mid-position valve. Programmer CENTRAL WATER HEATING MAINS C-Stat SUPPLY...
- Page 8 All wiring diagrams are schematic and should be used for guidance only. INSTALLATION AND CONNECTION OF THE C-STAT MUST BE CARRIED OUT BY A SUITABLY QUALIFIED PERSON. WARNING: ISOLATE MAINS SUPPLY BEFORE COMMENCING INSTALLATION TPI Temperature control software Thermostats using TPI (Time Proportional Integral) control algorithms will reduce the temperature swing that normally occurs when using traditional bellows or thermally operated thermostats.
- Page 9 Fitting the C-Stat to the wall plate Complete the installation by swinging the C-Stat into position by engaging the lugs at the top of the wall plate before pushing it firmly home into its plug-in terminal block. Tighten the 2 captive screws on the underside of the unit. Now ensure that the heating system is responding to the On/Off commands from the C-Stat.
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Page 10: Installer Settings
Installer Settings There are a number of 'Installer Settings' that should be set on installation. These can be found under the 'SET UP MENU' on page 15 of the user instructions. Clock Format AM/PM or 24 Hour clock display - Default setting AM/P Daylight saving... - Page 11 Resetting the thermostat Electronic equipment can in some circumstances be affected by electrical interference. If the display becomes frozen or scrambled simply press both the BACK and ENTER button simultaneously. BACK ENTER...
- Page 12 Specification – C-Stat 11-M | C-Stat 17-M Power Supply 230V 50Hz Contact type Micro-disconnection Wiring configuration Voltage free c/o contacts (SPDT) Contact voltage rating 230V ac 50Hz (30V dc) Contact current rating 8A (1A inductive) Temperature differential 0.5°C Temperature accuracy +/- 0.5°C to 21°C...