SiFlux 21-YG2.0-I 65/120-3/2-SC-10-T4

Pre-assembled multi-pump system for HVAC applications comprising one baseplate with oscillation absorbers, flange spacers, 2 painted steel distributors with suction- and discharge-side manometers, n electronically controlled in-line pumps (including 1 standby pump), one SCe HVAC switchgear with connection, swing check valves on the end pressure side, manual stop valves, counter flanges with seal on the loading and end pressure sides, cones and a differential pressure sensor with connection lines.

This ready-to-operate, stand-alone system has been predominantly designed for pumping heating water (in accordance with VDI 2035), chilled water and water-glycol mixtures without abrasive substances in closed heating, air conditioning and cooling systems. With mechanical seal for pumping water up to Tmax.=+120 °C.

Note: If water-glycol mixtures are used (or fluids with a viscosity other than that of clean water), then approval from Wilo must be obtained in advance.

Components

Switchgear

Hardware

Fully electronic Smart Controller (SCe) in a sheet metal enclosure, comprised of internal power supply, microprocessor with “Soft PLC”, analogue and digital inputs and outputs, LCD display (backlit) for displaying operating data, controller parameters, operating states of the pumps, error messages and the history memory. LEDs for display of the system status (operation/fault). Configuration of operating parameters and recognition of fault messages via Green Button Technology. Ascertainable main switch. Potential-free contacts for collective run and collective fault signals (SBM/SSM). Contacts for External On/Off and second setpoint. Wire break monitoring of the transmitter path. Fuse protection of the pump motors and of the variable frequency drive in the direct starting version via motor protection switch, in the SD version: Fuse in combination with thermal actuators. Fuse for cut-in of the pumps in the SD version, including thermal actuators and time relays in the star-delta combination.

Automatic, load-sensitive cut-in of 1 to n peak-load pump(s), depending on the control variables

• Pressure - constant, p-c
• Differential pressure - constant, dp-c
• Temperature controller, n=f (Tx)
• Speed controller, n=f (analogue In)
• Differential pressure constant, dT

Variable frequency drive with sine filter for an infinitely variable control of the base-load pump. Actual value display via analogue signal 0-10 V for external measurement/display option, 10 V corresponds to the final sensor value. External remote setpoint adjustment by 4…20 mA signal.

Additional costs for optional modules and connection modules for BMS and bus systems (installation at factory or later after technical clarification).

M-0-A switch (manual-zero-automatic): Preselection of the operating mode of the individual pumps and manual operation in the event of a control fault “Manual” (emergency/test mode available at mains power, motor protection available), “O” (pump switched off – cannot be switched on using the controller) and “Auto” (pump enabled for automatic mode via the controller). Evaluation relay for positive temperature coefficient, individual operation and fault signals. Converter 0/2-10 V to 0/4…20 mA, soft starter for peak-load pumps, connection to BMS systems in accordance with VDI 3814.

Bus systems: BACnet, LON bus, Modbus RTU.

Software functions

Fully automatic control of 1 to 4 pumps with frequency-controlled base-load pump via comparison of the setpoint/actual value. 4-20 mA sensor signal (wire break monitoring) for the actual value as controlled variable. Menu navigation with symbols and menu numbers. Two parameter settings can be selected: uncomplicated menu (setpoint and control mode) or expert mode (operation and control parameters). With/without standby pump, to be selected by Customer Service. Automatic cycling to the standby pump in the event of a duty pump fault. Operating mode of the pumps freely selectable (manual, off, automatic). Elapsed time indicator per pump and system. Switch cycle display per pump and system.

Automatically adjustable pump alternation:

• Standard setting: Impulse - The base-load pump is cycled at each new demand, regardless of operating hours
• Alternatively: Pump alternation dependent on operating hours, cycling of the base-load pump after the specified operating hours

Test run of automatic pump (pump kick)

• can be switched on
• Time between two pump test runs is freely programmable

Monitoring of maximum and minimum system values with adjustable time delays and limit values. External On / Off via contact for switching off the system automatic mode. Fault register for the last 16 faults. Setpoint switching, second setpoint can be switched on via contact. Logical reversal can be applied to SBM and SSM. Factory-preset parameters for easy commissioning/starter device.

Standard followed

Electrical equipment of machines EN 60204-1

Low-voltage switchgear combinations EN 61439-1 and 61439-2

EMC - Interference immunity for Industrial Environments EN 61000-6-2

EMC – Interference emission for residential, commercial and light-industrial environments EN 61000-6-3 (only for SC-FC up to 7.5 kW, above this interference emission for industrial environments EN 61000-6-4)

Limit values for motor efficiency in accordance with IEC 60034-30-2

Pumps

Glanded centrifugal pump in in-line design with built-in variable frequency drive for electronic control in the “constant differential pressure” (dp-c) operating mode.

Manual operation level with a pushbutton

• Setpoint adjustment or speed adaptation
• Control mode selection
  • dp-c (differential pressure constant)
  • n constant (speed)
  • PID controller
• Pump On/Off
• Select operating mode (for dual-pump operation):
• Main/standby mode
• Parallel operation
• Configuration of operating parameters
• Error confirmation

Pump display for displaying

• Control mode
• setpoint (differential pressure or speed)
• Errors and warning messages
• Actual values (e.g. electricity consumption, actual value of the sensor)
• Operating data (e.g. electricity consumption, operating hours)
• Status data (e.g. status of SSM and SBM relays)
• Device data (e.g. pump designation)

Interfaces

• 1x “Overriding Off” control input
• 1x “External pump alternation” control input (effective only in dual-pump operation)
• 1x Analogue input 0–10 V, 2–10 V, 0–20 mA, 4–20 mA for control mode (DDC) or for remote adjustment of the setpoint
• 1x Analogue input 0–10 V, 2–10 V, 0–20 mA, 4–20 mA for actual value signal of the pressure sensor
• Slot for Wilo CIF modules for connection to the building automation system
• Configurable potential-free fault and operation/operation-ready message
• Interface for dual-pump connection

Three-phase current motor with variable frequency drive, integrated dual-pump management, adjustable time interval for pump alternation (in dual-pump mode), integrated full motor protection, various operating modes for the heating mode (HV) or the air-conditioning mode (AC), access disable, various operation levels: Standard / Maintenance.

Scope of delivery

• Multi-pump system Wilo-SiFlux
• Wilo-SiFlux installation and operating instructions
• Pump installation and operating instructions
• Switchgear installation and operating instructions