The EPC-89D is a high-precision dual pump controller designed to optimize heating system efficiency and equipment lifespan through intelligent temperature differential management.
Need to Control Only One Pump?
If your system only requires single-loop control (either heating or hot water tank separately), view our cost-effective EPC-89S Single Pump Controller or explore more in our Pump Controllers category.
| Parameter | Specification Value |
| Power Supply | 230V AC ±10% / 50Hz |
| Power Consumption | 2W |
| Max Load (per pump) | 6A |
| Temperature Display | 0 – 99°C |
| C.H. Setpoint Range | 5 – 80°C |
| H.W. Setpoint Range | 20 – 80°C |
| Hysteresis (H.W.) | 5 – 30°C |
| Sensor Range | -10 – 120°C |
| Working Temperature | -10 – +50°C |
| Product Compliance | CE (RED/EMC/LVD), UKCA, FCC, ETL Listed, EAC, CRA, WEEE, RoHS 2011/65/EU, REACH, EMC 2014/30/EU |
| Factory Quality System | ISO9001:2015, ISO14001:2015 |
Installation Note
Troubleshooting
E1: C.H. sensor short circuit (C.H. pump runs continuously as safety measure)
E2: C.H. sensor open circuit (C.H. pump runs continuously as safety measure)
E3: H.W. sensor short circuit
E4: H.W. sensor open circuit
Note: For indoor use only. Keep in dry environment.
A: The EPC-89D uses smart temperature differential logic to manage both C.H. and H.W. pumps efficiently. The C.H. pump runs only when the boiler reaches your set temperature, while the H.W. pump automatically balances boiler and tank temperatures based on your hysteresis settings. This targeted distribution prevents unnecessary energy waste and reduces fuel consumption.
A: The controller features comprehensive automatic protections, including:
Anti-Stop Function: Runs each pump for 15 seconds every 14 days during off-season to prevent limescale buildup and motor seizure.
Frost Protection: Activates pumps to circulate water once temperatures drop below 5°C to prevent pipe freezing.
Overheating Safety: Instantly triggers an acoustic alarm and visual alert if the boiler exceeds 91°C.
A: Yes. The EPC-89D offers multiple modes. In Priority Mode (P), the controller prioritizes domestic hot water heating first, running the C.H. pump only after the target H.W. tank temperature is met. You can also switch off priority to run them independently, or activate Summer Mode (L) to run hot water only while C.H. remains idle.
A: These codes indicate specific temperature sensor faults for quick diagnostic troubleshooting:
E1 / E2: C.H. sensor short circuit or open circuit. (As a safety fallback, the C.H. pump will run continuously until resolved).
E3 / E4: H.W. sensor short circuit or open circuit.
A: Absolutely. The EPC-89D is manufactured under strict ISO9001:2015 and ISO14001:2015 certified quality systems. The product itself carries major global market certifications, including CE (RED/EMC/LVD), UKCA, FCC, ETL Listed, EAC, CRA, WEEE, and RoHS, ensuring complete safety and commercial readiness for installers worldwide.
The EPC-89D is a high-precision dual pump controller designed to optimize heating system efficiency and equipment lifespan through intelligent temperature differential management. Model: EPC-89D Dimension: 159.5 mm (W) x 70 mm (H) x 36.5 mm (D) Application: Central Heating (C.H.) & Domestic Hot Water (H.W.) pumps Power Supply: 230V AC ±10% / 50Hz Max Load: 6A per channel Certifications: ETL Listed, CE, UKCA, CRA, EAC, WEEE
Learn More
The EPC-89D is a high-precision dual pump controller designed to optimize heating system efficiency and equipment lifespan through intelligent temperature differential management. Model: EPC-89D Dimension: 159.5 mm (W) x 70 mm (H) x 36.5 mm (D) Application: Central Heating (C.H.) & Domestic Hot Water (H.W.) pumps Power Supply: 230V AC ±10% / 50Hz Max Load: 6A per channel Certifications: ETL Listed, CE, UKCA, CRA, EAC, WEEE
Learn More
Address:No.6 of Tong'an Industrial Park, Meixi Rd,Tong'an District, Xiamen China 361100
Phone:+86 0592 6155792
Email:info@etopcontrols.com
