Buderus 7747011938 4321 Master Controller Logamatic 4000
Buderus 7747011938 Logamatic 4000 - 4321 Master Controller
R 4321/4322 Page: 1 / 2 Wiring diagram: Issue: 04/2009 7308 6720618975 Proj. no.: Mat. no.: Boiler control panel R4321/4322 US Signal hours run Signal fault Boiler water temp. controller (TR) Burner enable L via safety equipment 105 warmer colder Signal hours Output voltage L1 Burner close/off Burner open/on Note! Installation, circuit breaker, main shutoff switch, emergency shutoff switch and protective measures in accordance with local regulations. Please note! Never use ground wire (green/yellow) for controls purposes. Verify that power is connected to the appropriate terminals. This control must be hard wired. 1) Contact opens when the selected temperature is exceeded. 2) The total current for each power circuit (L1, L2) must not exceed 10A. This value must be adhered to. Verify maximum current draw after start-up in order to avoid damage to the device! 3) Please note! Only one MEC2 can be allocated to each control panel. The MEC2 can be plugged into the control panel or room wall-mounted using the wall installation kit (optional) wired to the ZM or FM module. 4) Terminal for optional external safety equipment. Interrupts the burner only! 5) When connecting multiple ECOCAN-BUS components, the S1 hook switches (termination on the NM482) of the two outermost ECOCAN-BUS devices must be closed. 6) L2: fuse protection of the modules in slots A, 1, and 2 L1: fuse protection of the modules in slots 3 and 4 B Boiler module ZM434 Controller module CM431 Slots 3 & 4 for FM modules Slots 1 & 2 for FM modules Power module NM482 (behind the controller module) MEC23) or boiler display AUT 0 max AUT 0 1 2 A B 3 4 60 50 90 80 70 AUT Connector socket for external service units BUS (internal) Switching states M Switch position Stage 1 Stage 2/ modulating k1 k2 k3 Button Button pressed pressed AUT 0 max l+ll Control mode Control mode hotter Control mode colder M Switch (PK) (SR) (SR) position k4 k5 k6 0 AUT Control mode Control mode Control mode = warmer = colder Control voltage 120V Extra-low voltage for sensors A Controller module CM431 Power module NM482 ECO BUS 123 5) S1 Netz NL L1 N N L2 ECOCAN-BUS AWG18 shieled AUT Operation 1a 1b 2a 2b 1 2 Fuses each 10AT 2) 6) L1 L2 Manual 1 reset 2 3 high limit (STB) 1) 1b 1a 1 NL Power supply for additional FM module at slot 3 (4) Boiler water 2 4 temperature 1 controller (TR) 1) Boiler module ZM434 AUT 0 max l+ll k1 Input autom. control 1 k2 k3 M AUT 0 k4 k5 k6 Netz NL N1 2 3 4 5 6 7 8 9 10 11 12 13 ES FG FZ FK FA BF UBR UPU 121212121212- +- + -+ Power supply for additional FM module at slot 1 or 2 NL AWG18 SI NL 17 18 19 AWG12 /PE N L Mains 120V 60Hz Max. permissible fuse rating 20AT on site Component 1 Component 2 4) 23 1 23 1 Connection example for safety components (on site) BR 4 8 9 10 11 12 4 8 9 10 11 12 N B4 S3 T1 T2 L1 Gas/oil burner Burner connection stage 1 max. 8A2) (BR) SG 4567 Terminals for vent damper (SG) UE N1 2 3 4 Terminals for flue gas monitoring (UE) SR 41 43 44 AWG14 41 43 44 N Return temp. actuator (SR) 120V max 5A 2) PK 61 63 BR II 36 37 38 39 AWG14 N ML Boiler pump (PK) 120V max 5A 2) 36 37 38 39 B5 T6 T7 T8 Burner connection stage 2 or connection for modulating burner (BRII) -+ 12 12 External Flue gas fault input temp. sensor (zero volt) (FG) (ES) or input fuel changeover two-fuel burner 5VDC 10mA Auxiliary temp. sensor (FZ) 12 Boiler water temp. sensor (FK) Outdoor Remote control temp. sensor MEC2 3) (FA) or BFU (BF) Voltage output 0-10V burner (UBR) M Voltage output 0-10V pump (UPU) For system example, see back of page Boiler control panel R4321/4322 Proj. no.: Mat. no.: 7308 6720618975 Wiring diagram: Issue: 04/2009 R 4321/4322 Page: 2 / 2 System example 1 FA BF AWG18 ES Mains AWG14 AWG18 AWG18 R 4321 AWG14 AWG18 UBR AWG18 BR FK BR AWG18 FZ M SR Buderus Thermostream boiler or LT boiler with base line temperature Example of the connection of a Thermostream boiler or LT boiler with low-end temperature control via a separate boiler circuit actuator (SR). System example 3 FA BF AWG18 ES AWG18 Mains AWG14 R 4321 AWG18 AWG18 AWG14 AWG18 UBR AWG18 BR FK BR UPu FZ PK 1) Legend: BF remote control MEC2 or BFU BR burner ES external fault input (dry contact) FA outdoor temperature sensor FK boiler water temperature sensor FZ auxiliary temperature sensor PK boiler pump SR return temperature actuator UPu voltage output 0-10V pump UBr voltage output 0-10V burner Buderus LT boiler Example of connecting a low temperature boiler. Low temperature boilers require heating circuit actuators to control the operating conditions. 1) A boiler circuit pump may be controlled when using low loss headers. Terminal UPu only required for modulating boiler circuit pump (0-10V). System example 2 FA AWG18 AWG18 Mains AWG14 R 4321 FK BrII BR BR BF ES AWG18 AWG14 AWG14 AWG18 UPu FZ PK M SR Buderus Thermostream boiler Example for integration of Thermostream boilers. Control via boiler actuator. Terminal UPu only required for modulating boiler circuit pump. System example 4 FA AWG18 AWG18 Mains AWG14 R 4321 FK BrII BR BR BF ES AWG18 AWG14 AWG14 AWG18 PK FZ M SR Buderus LT boiler with minimum return temperature Example for integration of boilers with return temperature control. Control via separate boiler actuator (SR). USAcrobat Distiller 8.1.0 (Windows)