ENGO CONTROLS EPC12HW Controller for CH Pump and HW Pump Instruction Manual

: October 30, 2023
: ENGO CONTROLS

Table of Contents

ENGO CONTROLS EPC12HW Controller for CH Pump and HW Pump
Product Information
Product Specification
Product Usage Instructions
Introduction
Product Compliance
Safety Information
Controller description
Technical specification
Wiring diagram
Controller operation
Manual mode
Tank temperature preview
Additional functions
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

ENGO CONTROLS EPC12HW Controller for CH Pump and HW Pump

Product Information

The EPC12HW Controller is designed to control CH (Central Heating) and HW (Hot Water) pumps. The CH pump turns on when the boiler temperature exceeds the user setpoint temperature. The HW pump turns on when the boiler temperature exceeds the temperature of the tank by a hysteresis value set by the user. The HW pump works until the temperature of the boiler and the temperature of the tank are equal or until the setpoint temperature of the tank is achieved. The product complies with the essential requirements and other relevant provisions of the following EU Directives: EMC 2014/30/EU, RoHS 2011/65/EU. It is for indoor use only and must be installed by a qualified person in accordance with national and EU regulations. Incorrect wiring connections may cause device damage.

Product Specification

Power supply : 230 V AC
Max load of the CH pump output : not specified
Max load of the DHW pump output : not specified
Temp. measurement range: not specified
Setpoint temp. range for CH : not specified
Setpoint temp. range for DHW : not specified
Sensor temp. range : not specified
CH sensor cable length : not specified
DHW sensor cable length : not specified
Dimension [mm]: not specified

Product Usage Instructions

To change the hysteresis and setpoint temperatures for CH and HW pumps, press the menu button. On the display, a flashing letter “C”, “U”, or “H” will appear. Use the up and down buttons to change the desired setpoint temperatures. After a few seconds, the controller will go into operating mode and display the current temperature. The controller has a priority function (P function). When the priority is enabled, the HW pump turns on first, and then, after reaching the setpoint temperature of the HW tank, the CH pump starts to work. To activate priority, press and hold the menu button until the “P” and “L” letters appear on the display. Use the up and down buttons to select “P” and then confirm your selection with the menu button. Use the up and down buttons to activate (ON) or deactivate (OFF) the priority function. Confirm the selection with the menu button. The controller also has a summer mode function (L function). To activate summer mode, press and hold the menu button until the “P” and “L” letters appear on the display. Use the up and down buttons to select “L” and then confirm your selection with the menu button. Use the up and down buttons to activate (ON) or deactivate (OFF) summer mode. Confirm the selection with the menu button.

Introduction

The controller is designed to control CH and HW pumps. CH pump turns ON when boiler temperature exceeds user setpoint temperature. HW pump work depends on the temperature difference. HW pump turns on when boiler temperature exceeds the temperature of the tank by hysteresis value set by user. HW pump works until the temperature of the boiler and the temperature of the tank will be equal or setpoint temperature of the tank will be achieved.

Product Compliance

This product complies with the essential requirements and other relevant provisions of the following EU Directives: EMC 2014/30/EU, RoHS 2011/65/EU.

Safety Information

Use in accordance to national and EU regulations. Use the device as intended, keeping it in dry condition. Product for indoor use only. Installation must be carried out by a qualified person in accordance to national and EU regulations. Before carrying out any activities related to the power supply (connecting wires, device installing etc.), make sure that main power is not connected to the controller! Incorrect wiring connections may cause device damage.

Controller description

Power supply indicator
CH pump operation indicator
HW pump operation indicator
Display
Increasing setpoint temperature or value
Menu button
Decreasing setpoint temperature or value
Controller power supply
CH pump power supply
HW pump power supply
HW temperature sensor
CH temperature sensor
ON/OFF power supply switch

Technical specification

Power supply 230 V / 50Hz
Max load of the CH pump output 3 (1) A
Max load of the DHW pump output 3 (1) A
Temp. measurement range 0 – 99°C
Setpoint temp. range for CH 5 – 80°C
Setpoint temp. range for DHW 20 – 80°C
Sensor temp. range -10 – 120°C
CH sensor cable lenght 1,5m
DHW sensor cable lenght 3m
Dimension [mm] 155 x 70 x 39

Wiring diagram

ENGO-CONTROLS-EPC12HW-Controller-for-CH-Pump-and-HW-Pump-
fig-2

Controller operation

Hysteresis and setpoint temperatures for CH and HW pumps can be changed by pressing button (menu option). On the display will appear flashing letter „C”, „U”, or „H” and at this point we can change the desired setpoint temperatures using or buttons. After few seconds controller will go itself into operating mode and display the current temperature.

C – activation temperature of the CH pump above the set value (setting range 5-80°C).
U – maximum reservoir temperature (deactivates the DHW pump above the set value, setting range 20-80°C).
H – hysteresis of switching on the HW pump ( setting range 5-30°C).

P Function (priority)
With the priority enabled, the pumps are prioritized. HW pump turns on firstly and then, after reaching setpoint temperature of the HW tank – CH pump starts to work. With the priority turned off pumps are working independently without priority for the HW pump. To activate priority, press and hold button until the „P” and „L” letters will appear on the display. Use or buttons to select „P” and then confirm your selection with button. Use or buttons to activate (ON) or deactivate (OFF) priority function. Confirm the selection with button.

L function (summer mode)
This function deactivates CH pump. Only HW pump is running and CH pump will turn on only when boiler reaches 90°C temperature – protecting function will protect boiler against overheating

To activate summer mode, press and hold button until the „P” and „L” letters will appear on the display. Use or buttons to select „L” and then confirm your selection with button. Use or buttons to activate (ON) or deactivate (OFF) summer mode. Confirm the selection with button

Manual mode

Manual control of the CH and HW pump depends on the operation mode and safety rules in the central heating phase (overheating). Holding down the and buttons will enable / disable the central heating pump for continuous operation. Holding down the and buttons will enable / disable the hot water pump for continuous operation. The hot utility water pump turns off always after reaching the maximum temperature of the reservoir or until the temperatures are equal.

Tank temperature preview

Tank temperature preview is available on pressing the button. After a few seconds, the controller will return to displaying the boiler temperature

Histeresis
This is the difference between setpoint temperature of the pump start and setpoint temperature of the pump stop.

For example:

For the central heating system, the controller has a constant 2°C hysteresis. After setting the temperature in the „C” parameter, eg at 30 °C, the pump will be turned on after exceeding 30 °C, and it will be turned off when the temperature drops below 28 °C.
In the HW system, after setting the temperature in the „U” parameter to 50 °C, the H.W pump will be turned off when the temperature exceeds 50 °C. However, it will be activated when the temperature drops below the „U-H” value

Additional functions

Controller has an „anti-stop” function which protects pump against lime scale when there is no heating season. Pump is turned on every 14 days for 15 seconds. An additional protection is the frost protection function, which runs pump permanently when temperature on the sensor drops below 5°C.

Alarm
The controller is equipped with an acoustic alarm signaling: