3 132 Synco™ 700 Boiler Sequence Controller RMK770 • Modular controller for sequencing up to 6 boilers, for boiler temperature, heating circuit and precontrol; supplied with 18 programmed multiboiler plants • Menu-driven operation with separate operator unit (plug-in type or detached) • KNX bus connection facility for operation and process information Use Types of buildings • • • • • • Office and administrative buildings Commercial buildings and shops Schools Hospitals Industrial buildings and worksh
Functions General functions • Maximum of 7 control systems with modulating outputs (3-position or DC 0…10 V): − Modulating burner − Heating circuit with mixing valve − Precontrol with mixing valve − Maintained boiler return temperature with mixing valve • Control of a maximum of 7 pumps (single or twin pumps) • 18 programmed multiboiler plants integrated • Freely configurable inputs for measuring signals and extra operating functions • Fault status indication with red LED, acknowledgement with button.
• Room model for room functions without room temperature sensor • Automatic heating limit for demand-dependent control of the heating system with adjustable heating limits fo r Comfort and Economy mode • Automatic changeover to summer operation (heating off) • Maximum limitation of the room temperature • Minimum and maximum limitation of the flow temperature • Maximum limitation of the return temperature • Limitation of the rate of flow temperature increase • Valve overrun, valve kick • Pump overrun, pump k
• Sending the 7-day or yearly program for holidays / special days to some other controller, or reception of the 7-day or yearly program for holidays / special days from another controller Universal transmission and reception zones Device RMK770 allows for universal data exchange via own terminals as well as via terminals of extension modules RMZ78x. Data between devices is exchanged via KNX bus.
Type summary Boiler sequence controller Device Boiler sequence controller Selection of languages The following languages are loaded: Type RMK770-1 Data sheet N3132 English, German, French, Italian, Spanish, Portuguese, Dutch, Danish, Finnish, Norwegian, Swedish, Polish, Czech, Hungarian, Russian, Slovakian, Bulgarian, Greek, Romanian, Slovenian, Serbian, Croatian, Turkish. Note Starting from software version 3.00, all languages are included in the same type.
Technical design Mode of operation The RMK770 boiler sequence controller is supplied complete with 18 programmed standard applications including heat sources with 2 boilers. Some of them necessitate extension modules. All types of plant can be matched to specific requirements, such as additional boilers, primary controller, heating circuit or twin pumps.
K1.x 3132S01 Types of hydraulic circuits Multiboiler plant with • 1 main pump in the common boiler flow 3132S04 K2.x M Multiboiler plant with • 1 main pump in the common boiler flow • 1 shutoff valve in the return of each boiler M 3132S07 K3.x M M Multiboiler plant with • 1 main pump in the common flow • 1 bypass pump per boiler • 1 shutoff valve in the return of each boiler 3132S10 K4.x Multiboiler plant with • 1 pump in the return of each boiler 3132S13 K5.
3132S16 K6.x Variants Multiboiler plant with • 1 shutoff valve in the return of each boiler • Maintained boiler return temperature of each boiler (modulating or 3-position control) To ensure optimum plant operation, all programmed plant types are configured with boiler sensor, main flow sensor and main return sensor. Following must be observed: T If no boiler sensor is installed, use of a main flow sensor is mandatory.
In addition to boiler sequence control and boiler temperature control (boilers 1…6), the RMK770 provides the following control functions: • Control of a heating circuit in the form of weather-compensated flow temperature control • Demand-dependent precontrol Heating circuit control R5 A5 3132S37 B5 R5 A5 Weather-compensated pump heating circuit control B9 B9 3132S77 Weather-compensated heating circuit control Generation of a weathercompensated flow temperature setpoint R5 A5 B9 3132S76 Control l
1 2 11 3 3144Z01 Operating, display and connecting elements 4 1 2 3 4 5 6 7 8 9 10 11 5 6 7 8 9 5 11 10 Connection facility for service interface (RJ45 socket) Connection facility for operator unit (with removable cover) LED (green) for indication of operation Fault button with LED (red) for indication of faults and for resetting Openings for plug-in type operator unit RMZ790 Button for assigning the device address LED (red) for indication of the programming process Mounting facility for fitti
3144Z03de Kleinspannungsseite Netzspannungsseite • Prior to mounting the RMK770, the system must be disconnected from power supply • The insert of the RMK770 must not be removed from the terminal base! • If extension modules are used, they must be attached to the right side of the RMK770 in the correct order and in accordance with the internal configuration • The extension modules require no wiring between them or from the modules to the RMK770.
Technical data Power supply (G, G0) Functional data Analog inputs X1…X8 Digital inputs X1…X8, D1, D2 Positioning output Y1, Y2 Switching outputs Q1x…Q7x Operating voltage Requirements for external safety isolating transformer (100 % duty, max. 320 VA) to Frequency Power consumption (excl.
Contact life at AC 250 V 0.1 A (res.) N.O. contact at 0.5 A (res.) Changeover contact at 0.5 A (res.) N.O. contact at 4 A (res.) Changeover contact at 4 A (res.) Reduction factor at ind. (cos φ = 0.
Ambient conditions Operation to Climatic conditions Temperature (housing with electronics) Humidity Mechanical conditions IEC 60721-3-3 class 3K5 0…50 °C 5…95 % r. h. (non-condensing) class 3M2 Transport to Climatic conditions Temperature Humidity Mechanical conditions IEC 60 721-3-2 class 2K3 −25…+70 °C <95 % r. h.
G X1 M X2 M G1 X3 M X4 M G1 X5 M X6 M G1 X7 M X8 M Q11 Q23 Q14 N1 Q24 Q33 Q41 Q53 Q63 Q73 N2 Q34 Q42 Q44 Q54 Q64 Q74 RMK770 G0 G1 Y1 G0 G1 Y2 G0 CE D1 M D2 M CE CE+ CE− D1, D2 G, G0 G0 G1 M N1, N2 Q1…, Q4… Q2…, Q3…, Q5…, Q6…, Q7… X1…X8 Y1, Y2 Notes Q12 3132G01 Connection diagram KNX bus data line (positive) KNX bus data line (negative) Status or impulse contact Operating voltage AC 24 V System neutral for signal output Output voltage AC 24 V for powering external active sensors, s
L G AC 230 V AC 24 V ∆p G F4 M X... M X... M X... F32 F31 G0 Q63 Q73 Q64 Q74 F31 N1 F32 K2 K1 G0 3132A01 Connection of 1 twin pump or 2 single pumps N F31, F32 F4 K1 K2 N1 L AC 24...230 V Connection of safety loop for a 2-stage burner Overcurrent release contact Pressure switch Motor contactor for pump Motor contactor for pump RMK770 boiler sequence controller Q23 Q33 Q34 N1 Q24 F2 F1 E1 1. 3132A04 2. N E1 F1 F2 N1 L AC 24...
Overview of the programmed plant types Plant diagram K1.1 N.Q7 N.X1 N.X3 N.X6 N.Q2 N.Q5 3132S19 Plant type Description K1.1 Functions: • Boiler temperature control with 1-stage burner; optionally with modulating burner using DC 0…10 V control • Control of the main flow or main return temperature • Control of the main pump N.X2 Functions: • Boiler temperature control with 2-stage burner • Control of the main flow or main return temperature • Control of the main pump K1.2 N.Q7 N.X1 N.X6 N.X3 1.
Plant diagram K2.3 N.Q7 N.X1 N.X3 N.X6 N.Q2 A9.Q1 A9.Q2 N.Q5 A9.Q3 A9.Q4 N.Q1 M N.Q4 M 3132S24 Plant type Description K2.3 Functions: • Boiler temperature control with modulating burner using 3-position control • Control of the shutoff valve in the boiler return • Control of the main flow or main return temperature • Control of the main pump This requires extension module type RMZ789 N.
Plant diagram K4.2 N.X3 N.X1 N.X6 1. 2. 1. 2. N.Q2 N.Q3 N.Q5 N.Q6 3132S29 Plant type Description K4.2 Functions: • Boiler temperature control with 2-stage burner • Control of the boiler return pump • Control of the main flow or main return pump N.Q4 N.Q1 N.X2 Functions: • Boiler temperature control with modulating burner using 3-position control • Control of the boiler return pump • Control of the main flow or main return temperature This requires extension module type RMZ789 K4.3 N.X3 N.
K6.3 N.Q2 N.Q5 N.X7 N.X4 N.Q4 N.Q1 A9.Q3 A9.Q4 A9.Q1 A9.Q2 N.X2 Maintained boiler return temperature DC 0…10 V None RMZ789 Functions: • Boiler temperature control with 2-stage burner • Controlled maintained boiler return temperature, with 3position control (optionally with DC 0…10 V control) • Control of the boiler circuit pump • Control of the main flow or main return temperature If 3-position control is used for maintained boiler return temperature, extension module type RMZ789 is required K6.
Dimensions 80 5 3 173 2 3 44 RMZ790 66,4 = EN 60 715-TH 35-7.
Issued by Siemens Switzerland Ltd Building Technologies Division International Headquarters Gubelstrasse 22 6301 Zug Switzerland Tel. +41 41-724 24 24 www.siemens.com/buildingtechnologies © Siemens Switzerland Ltd, 2004 Technical specifications and availability subject to change without notice.
