Detailed Description

The DHC-8000 series was discontinued 13 years ago and subsequently upgraded to the DHC-9000 series, which has the same dimensions but more powerful functions and is fully replaceable.

1.1 Features of the DHC-9000 Series Microcomputer Water Supply Controller

This product is the latest advanced microcomputer water supply and replenishment controller developed in response to the demands of a wide range of users. The controller uses high-quality surface-mount electronic components and is powered by a switching power supply, integrating the latest single-chip microcomputer control technology. When combined with a frequency converter, it forms a water supply system for both domestic and fire-fighting use.

Features:

1.    Powerful functionality: Timed pump switching, six-period timed startup/shutdown, and six-period time-controlled pressure enable the entire system to meet the requirements of different users.

2.    Flexible configuration: The controller supports one active and one standby pump, one active and one replenishment pump, two-pump cyclic soft start, three-pump cyclic soft start, and four-pump cyclic soft start.

3.    Easy to use: Panel-mounted card-style installation for convenient setup and use. Features a dustproof and waterproof industrial panel designed to CE standards.

4.    Simple debugging: Simplified keyboard menu settings and adjustments for operational status. Utilizes intelligent PID algorithm with self-tuning PID parameters for high reliability and precision.

5.    High reliability: Hardware WATCHDOG for fault reset, with the microcomputer performing automatic checks every second. Software incorporates fault tolerance and anti-interference algorithms. Additionally, internal isolation enhances hardware interference resistance.

1.2  Functions of the DHC-9000 Series Microcomputer Water Supply Controller

l           Programmable settings for one to four pumps operation.

l           Full soft start for working pumps, following the principle of first start, first stop.

l           Timed pump switching when no additional pump is needed.

l           Configurable upper limit protection pressure and pressure relief output.

l           Configurable input of (0-5V) or (4-20mA).

l           Compensation for sensor errors.

l           Remote manual start/stop control.

l           Dynamic and static pressure method for boiler water replenishment.

l           Display of set pressure and real-time pressure.

l           Display of inverter frequency and real-time pressure.

l           Fault indicators for inverter, remote meter, under-voltage timeout, and water level alarm.

l           Real-time clock function (with battery) (models with /T suffix have this feature).

l           Programmable daily six-period high/low pressure water supply and startup/shutdown (T-type models have this function).

l           Sleep function.

l           Programmable operational duration.

l           Comprehensive password protection.

1.3  Technical Specifications

Power supply: AC 220V ±15%

Power consumption: < 6W

Contact capacity: 5A / 250V AC   5A / 30V DC

Operating temperature: 0°C to 40°C

Storage temperature: -20°C to 85°C

Relative humidity: 20 to 90% RH

Cutout dimensions: Width 151±1mm, Height 75±1mm.

Maximum dimensions: Width 160mm, Height 80mm, Depth 95mm.

Installation method: Plug-in.

Installation environment: Locations free from water droplets, steam, corrosive and flammable gases, dust, and metal particles.

Selection Guide

1.   2 pumps, one active and one standby (replenishment):  DHC-9100 / T

2.   2 pumps cyclic soft start:  DHC-9200 / T

3.   3 pumps cyclic soft start:  DHC-9300 / T

4.   4 pumps cyclic soft start:  DHC-9400 / T    

Model explanation:    D H C – 9 X 0 0 / T (with clock control)

Model   Series number  Number of operational pumps