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HydroWHIZ VSD

Hardware Features

Enclosure:
- IP44 rated, powder coated mild steel enclosure with removable gland plate, integral ventilation and thermostatically controlled fan
Protection:
- Pad-lockable mains power isolator switch
- Circuit breaker protected low voltage control and input circuitry
- Individual pump circuit breaker protection
Control & interface:
- HydroWHIZ colour touch screen HMI (see Interface features)
- HydroWHIZ PCB control module
- Variable speed drive per pump
Inputs:
- Single phase (230Vac) or three phase (400Vac) power supply
- Analog 4-20mA input for level, pressure or temperature transducer
- Up to 8x digital 24Vdc inputs for backup low and high float switches, pressure switches or thermostats, system enable/disable input and a low flow switch
Outputs:
- 1-6 pump outputs (230Vac three phase for both 1 & 3 phase versions)
- Digital volt free outputs for power on, low pressure, common fault, common pump run and common pump fault
- Output for solenoid valve available upon request
- Modbus RTU Serial RS485 connections for SCADA

Function Features

Multi pump control - Control of up to 6 pumps in any number of duty, duty assist and standby pump configurations
Pump limiting - For limiting max flow or power requirements
Duty sharing and alternation - Adjustable duty change period and bumpless transfer
Pump staging and destaging - Additional pumps are staged into operation to maintain setpoint and destaged when no longer required
Staggered pump start and stop - Prevents excessive current draw and reduce water surge or hammer
Manual control - Manual modes for system and pumps with 10 minute timeout to revert back to auto mode
System types - Level, pressure or temperature control modes
Control directions - For emptying or filling a tank, boosting or dropping pressure and heating or cooling temperature
Speed control of pumps - Proportional speed control for level and temperature control, PID control for pressure with adjustable proportional and integral values to change VSD responsiveness
Level control mode - Controlled by 4-20mA hydrostatic level transducer and optional backup high and low level float switches, submerged in a tank or pit
Tank top up valve control - Tops up tank with mains water when normal inflow of rain or treated water into tank does not keep up with demand (Specific to level control)
Maintain minimum level - Ensures minimum tank level is maintained (Specific to level mode, empty direction)
Pressure control mode - Controlled by 4-20mA pressure transducer and optional high and low pressure switches
Jacking pump control - Pump 1 will always be the first to wake from sleep and main pumps will start if unable to keep up with demand (Specific to pressure mode)
Mains bypass valve control - Switches to mains water to bypass supply tank when pumping system is out of water or in fault condition (Specific to pressure mode)
Sleep assist speed minimise - When the system is at setpoint and pump speed is constant due to no demand for water, the system will slowly drop the pump speed, helping it to go to sleep sooner (Specific to pressure mode)
Sleep assist boost - When the system is nearing setpoint and there is no demand for water, the system will boost the pressure before going to sleep so it can sleep for longer, reducing pump cycling (Specific to pressure control)
Pipe fill - If the system wakes up and pressure is low, pipe fill runs a single pump to gently build pipe pressure and shuts the pump down if unable to build pressure within 10 minutes (Specific to pressure mode)
Temperature control mode - Controlled by 4-20mA temperature transducer and optional backup high and low temperature thermostats
Sleep modes - Sleep can be enabled to allow pumps to sleep when setpoint is reached, or disabled so one pump is always running to circulate water (specific to temperature mode)

Fault Protection

Protection modes - Apply to most protections, and include alarm (alarm only), lockout (alarm and pump shutdown) and inhibit (pump shutdown only, no alarm)
High and low level, pressure or temperature protection - Alarm and/or shutdown on high and low level, pressure or temperature depending on the system type, low pressure protection features automatic restart attempts
Auxiliary tank level protection - Pump shut-down on supply tank low or destination tank full
Pump anti-seize protection - Runs pumps periodically during low use to prevent seizing
Maximum run protection - Activates after pumps run at max speed for 30 mins, protecting the system in the event of a burst pipe, with automatic restart attempts
Pump cycle protection - Activates if system goes to sleep but wakes up within 5 seconds, 10 times in a row, due to a faulty non-return valve or similar fault preventing the system from maintaining pressure
No flow protection - Activates if a pump is running but there is no flow for 30 seconds (if using flow switch instead of low level float), with automatic restart attempts
Feedback signal fault protection - Shuts down all pumps in the event of a transducer failing
Pump VSD fault protection - VSDs feature short circuit, overload, supply phase loss, under/over voltage, earth fault and other protections to protect the pumps

Interface Features

Main screen with system status, auto/off/manual modes
Pump screens with status, logged data and auto/off/manual control
Alarms screens with mute/reset, date & time stamped historical faults
Logged data with system event & fault counts, pump starts, run hours
Analog feedback value trend graph
Streamlined, user friendly system setup process
System diagnostics for easy fault finding, factory reset

Additional Options

/SMS - With ME-Link Module for SMS alarm/status messaging
/RMC - With rain/mains changeover control module and 12Vdc pulse latching solenoid valve
/GEN - With generator input socket and manual changeover switch
/ATS - With automatic generator changeover
Output for normally closed tank top up valve
IP56 rated enclosure with inner door and fan/vent covers
316 stainless steel enclosure
Free standing enclosure with plinth
Separate compartments for power authority meters
Modbus TCP gateway with ethernet port

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