User manual HONEYWELL L641

[. . . ] SURFACE CONTACT THERMOSTAT PRODUCT DATA L641 FEATURES · · · · · · · · · · Versions available for use as a cylinder thermostat in domestic hot water installations Versions available for use as a pipe thermostat in fan-coil applications Version available for use as a pipe thermostat in frost protection applications Version available for use as a pipe thermostat to limit the supply water temperature in underfloor heating and solid fuel systems The S. P. D. T. [. . . ] Type 1CL : 4(2) A, 230 V~ : see table : Approximately 10 K non-adjustable : 0 to 95 C o ORDERING SPECIFICATION Model L641Al039 L641Bl004 L641B1012 L641Bl020 Application Cylinder Thermostat Low Limit Pipe Thermostat High Limit Pipe Thermostat High Limit Pipe Thermostat Temperature Setting Range Min, 40 to 80 o C Min, 10 to 40o C 50 to 95oC 40 to 95oC : 0 to 70oC : L641A mounts directly onto cylinder using fixing strap provided L641B mounts directly onto pipes using fixing springs provided : 44 x 79 x 54mm (1. 73" x 3. 11" x 2. 13") (w x h x d) : 3 terminals with wiring clamps, accepting wires up to 1. 5 mm2 Dimensions Wiring DIMENSIONS IMPORTANT 1. The installer must be a trained service engineer 2. Disconnect the power supply before beginning installation Dimensions in millimetres (inches in brackets) INSTALLATION Mounting The L641A cylinder thermostat should be mounted /4 to /3 of the way from the bottom of the domestic hot water cylinder after removing a section of the insulation and cleaning the surface. The L641B pipe thermostat should be positioned less than 0. 6 m (2') from the boiler, or on a supply pipe to a fan-coil unit, close to the 3-port control valve. 1 1 Wiring Cover removal Wiring to terminals EN0R 8444 2 L641 SURFACE CONTACT THERMOSTAT APPLICATION DHW Storage Tanks/ Cylinders (see note 1) High Limit Underfloor Heating Systems (see note 2) High Limit Solid Fuel Systems (see note 2) Low Limit Frost Protection (see note 3) Fan-Coil Unit Summer/ Winter Changeover for 2-pipe units (see note 4) L641Al039 L641Bl004 L641Bl012 L641Bl020 4 4 4 4 4 4 4 Notes 1. The L641A should be mounted 1/4 to 1/3 of the way from the bottom of the cylinder. The L641B should be mounted less than 0. 6 m (2') from the boiler. [. . . ] (ENOR8402, 8403, 8406) WIRING DIAGRAMS L641A1039 DHWS ControL L641B1012 L641B1020 High Limit L641B1004 Automatic Summer/Winter Changeover XE90 Timer Heating Load Terminal 2 used on Honeywell Y-Plan systems Heating Load and existing controls Contacts C and 1 break on temperature rise L641B1004 Low Limit (Frost Protection) L641B1004 Automatic Summer/ Winter Changeover XE70 series Typical wiring XE70 Series Connected to override existing time and temperature controls Contacts C and 1 make on temperature fall Fan coil Unit Honeywell Control Systems Limited Newhouse Industrial Estate Motherwell ML1 5SB United Kingdom Helping You Control Your World EN0R 8444 [. . . ]