FAQ

ECD installs an electrolytic cell in a side stream. A DC field drives scale-forming ions (calcium, magnesium, etc.) toward the cathode surface, where water reduction locally raises the pH to 9–11 and causes calcium carbonate to crystallise directly on the plate. The deposit is then removed mechanically or by automatic flushing. The difference is fundamental: chemical dosing keeps the scale-forming ions in the water by suppressing precipitation, which limits cycles of concentration to roughly 3–5; ECD physically removes the hardness ions from the water, decoupling scale control from the concentration ratio. The system can therefore run at higher cycles of concentration, reducing both makeup water and blowdown.

No. ECD is installed in a side-stream (bypass) configuration: a branch line is taken from the main circulating water pipe, passed through the electrolytic cell, and returned to the system. Tie-in work is carried out while the system is running, with no shutdown of the host equipment required.

Scale inhibitors can be reduced substantially or even stopped, but biocides, algaecides and pH adjusters are usually still needed. ECD addresses scale formation; microbiological control and corrosion control are separate problems. In practice, ECD should be regarded as a replacement for the scale inhibitor, not as a replacement for the entire water-treatment chemical programme.

Conventional chemical dosing typically operates at 3–5 cycles of concentration; beyond that range the inhibitor loses effectiveness and corrosion risk rises. ECD changes the limiting condition by physically removing hardness ions, but the achievable value still depends on the makeup-water quality, system metallurgy and blowdown strategy. The figure must be calculated from on-site water analysis and cannot be quoted without those inputs.

Savings come from the reduction in blowdown and makeup water as the cycles of concentration rise. As a worked example, a system with 2 million m³ of annual circulation running at 4 cycles under chemical treatment would have annual blowdown of roughly 100,000 m³. Switching to ECD can bring this down significantly, with annual water savings in the order of tens of thousands of cubic metres. The exact number depends on the makeup-water quality, target cycles of concentration and ambient temperature/humidity, and should be calculated against the specific site parameters.

Every 0.1 mm of scale raises the condensing temperature by approximately 1 °C and increases chiller power consumption by about 3%. For a 1,000 kW centrifugal chiller running 6,000 hours per year at an industrial tariff of ¥0.8/kWh, the annual electricity bill is around ¥4.8 million, so a 3% penalty is roughly ¥144,000 per year. Because the loss is invisible in day-to-day operation, it often persists for years.

Full-condition cooling energy optimisation means finding the best match between heat-transfer efficiency and energy consumption across the entire range of operating conditions a plant sees through the year, not only at the design point. Cooling-tower leaving-water temperature, circulating-water pump frequency, fan speed and cycles of concentration are treated as linked variables. The approach covers four layers: water-quality stability, hydraulic balance, heat-exchanger cleanliness management, and intelligent O&M. It is most applicable to continuous-process plants whose load varies substantially with season and production volume.

Yes. Per GB 29364 "Fire Door Monitor" and related building-fire-protection codes, normally-open fire doors installed on evacuation routes must close automatically in a fire event, and their state must be reported back to the fire-control room. A fire door monitoring system is the dedicated system that implements this linkage and state feedback.

In normal use the door is held open by an electromagnetic release device. When the fire-alarm controller issues a linkage signal, the fire door monitor sends a release command to the door's release device; the electromagnet loses power, and the door closer drives the door to close. A door-magnet switch detects the closed position and reports "closed" back to the monitor and the fire-control room in real time.

The residual-current alarm value is typically adjustable within 20 mA–1000 mA, and the actual setting should be based on the nature of the circuit and the measured standing leakage current. The general engineering practice is: first measure the inherent leakage current under normal operation, set the alarm at least 2× that value with margin to avoid nuisance trips, and adopt a two-stage "early warning + alarm" scheme so the warning fires first and the alarm drives the linkage. This balances reliability and availability.

No. An RCD is a protective device that disconnects the circuit on detection of hazardous residual current, typically for personal-shock protection. An electrical-fire monitoring system only monitors, it does not disconnect. It issues an early warning when residual current or temperature is slowly rising, so the fault can be addressed before it becomes a fire. The two functions are complementary and cannot replace each other.

It primarily detects five states: over-voltage, under-voltage, over-current, phase loss and supply interruption. Sensors are installed on the load side of the ATS (Automatic Transfer Switch) in the fire-equipment distribution circuit and report status to the monitor in real time. The reason such a system is needed is that fire pumps, smoke-control fans and similar equipment are normally idle; a fault on their supply circuit — a circuit breaker inadvertently opened, a phase lost — remains "invisible" until a real fire exposes the failure, by which time it is too late.

Per the relevant code, the pressure differential between a smoke-proof staircase and the corridor is typically held at 40–50 Pa, and between a fire-fighting lobby and the corridor at 25–30 Pa. If the differential is too small, smoke can backflow and the pressurisation effect is lost; if it is too large, the escape door becomes difficult to open. A stairwell pressurisation system measures the differential on both sides with sensors and modulates the supply-air damper actuator to keep the value within the target band.

Standard protocol is MODBUS-RTU over RS-485, with selectable baud rates from 1,200 to 38,400 bps. This is the most common industrial protocol and connects directly to the vast majority of PLC, DCS and building-automation systems. Selected models additionally support BLE Bluetooth for on-site commissioning and mobile meter reading. For cloud upload, a Freya gateway performs protocol conversion and forwards data via MQTT/HTTP.

Taking the Rynon Weil series as an example: active energy is class 0.5S, voltage and current class 0.2, and power class 0.5, compliant with GB/T 17215-2008 and GB/T 22264-2008. Class 0.5S meets the requirements for internal energy-management accounting and sub-metering. For trade settlement (charging an external party), a meter that has passed statutory verification and carries the official seal must be selected per local metrology regulations. Please indicate the intended use at quotation stage.

The IoT meter uses a host + expansion-module architecture. IP1000 is the base module handling main metering. IP1100 is the common power module that supplies the other modules. Expansion modules are selected by need: IP5000 adds extra metering channels; IP5800 adds power-quality analysis; IP6000 adds electrical-fire monitoring; IP1600 adds status (digital I/O). A4111 is a temperature sensor. Building the system from the modules you actually need avoids paying for functionality you do not use.

Not necessarily. If the existing meters already support RS-485 and MODBUS, a gateway can collect their data and the platform can implement the billing and prepayment logic; remote on/off control requires adding a remotely operable circuit breaker on the outgoing circuit. If the existing meters do not support communication, they will need to be replaced with prepaid-capable meters. The right approach depends on the structure of the existing distribution cabinets and the outgoing circuit configuration.

Rynon is a manufacturer. The company operates its own production base in Jiading, Shanghai, equipped with SMT lines and lead-free soldering processes, with a complete manufacturing line that covers component processing through final assembly, and in-house quality control at every stage. R&D, production, commissioning and training are all performed in-house. The company was founded in 2011 and was recognised as a National High-Tech Enterprise of China in 2025.

Yes. Our service system covers three stages: pre-sales (selection support and solution configuration), in-sales (production scheduling and delivery), and after-sales (on-site commissioning, training and O&M support). For selection, please provide the circuit parameters, distribution-cabinet dimensions, communication topology and project scale; we will issue a configuration list based on that information.

Standard models are usually kept in stock or built on a short cycle, and the actual lead time depends on the specific model and quantity. Non-standard customisation and large-batch orders are scheduled according to the production plan. For urgent requirements please notify us in advance and we will provide a committable delivery date based on actual capacity. The lead time confirmed by us in writing is the binding one; this page is not a delivery commitment.