1 General Information
This section provides essential information regarding the safe and compliant use of the E8 Thermo Controller.
1.1 Symbols Used in the Manual
- ⚠️ DANGER!: Indicates serious danger to safety and life.
- ❗ ATTENTION!: Indicates a possibly dangerous situation for the product and environment.
- ? NOTE!: Provides tips for the user.
1.2 Compliant Use of the Appliance
The appliance is designed for operation in hot water circulating heating systems and built to current standards. Any other use is considered unsuitable. The manufacturer is not liable for damage resulting from improper use or failure to observe the instructions in this manual.
1.3 Information to be Provided to the User
Users must be instructed on the system's use and operation, including:
- Handing over these instructions and other documentation.
- The importance of ventilation and the flue/condensate system.
- How to control water pressure and restore it.
- How to regulate temperature and thermostats for energy saving.
- Ensuring the manual accompanies the appliance upon sale or transfer.
- Recommending annual servicing by a Gas Safe registered engineer.
1.4 Safety Warnings
ATTENTION! Installation, adjustment, and maintenance must be carried out by a Gas Safe registered engineer.
DANGER! Maintenance or repair work requires a Gas Safe registered engineer. Poor maintenance can compromise safety and cause damage. Do not make changes to the boiler, gas, air, water, or power supply lines, flue pipe, safety valve, condensate pipe, or any constructive elements affecting operational safety.
Smell of Gas: In case of a gas smell, do not smoke, operate electrical switches, turn off the gas supply immediately, extinguish all ignition sources, ventilate the room, and contact the National Gas Emergency Service on 0800 111 999.
Explosive and Easily Flammable Substances: Do not use or deposit these materials in the room where the appliance is installed.
2 Instructions for Use
2.1 Description of E8 Thermo Controller (TGC) Boiler Manager Fields and Levels
The controller has various fields and levels for configuration and monitoring. Refer to the 'Instructions for use' supplied with the E8 Thermo Controller for more details.
Fields:
- General: For value selection, technician controls, and user settings (Date/Time/Holidays).
- Display: Shows system values (sensor and nominal values); no changes possible.
- User: For user-configurable setting values.
- Time program: For timed programs for heating circuits, domestic hot water, and supplementary functions.
- Expert: For settings requiring specific installer knowledge. Access is protected by code numbers.
- Plant Expert: For values sent by the element board (EB).
Levels:
- SETUP: General display and setting values for the boiler or system.
- HOT WATER: Settings related to the domestic hot water system.
- HEATING CIRCUIT I/II: Settings for respective heating circuits.
- SOLAR / MF: Settings for solar energy production and multifunctional relay configurations.
Parameter Editing Procedure:
To edit parameters:
- Use the navigation knob to select the FIELD.
- Once the FIELD is selected (e.g., DATE/TIME), press the programming key. The red LED will light up.
- The modifiable parameter will be displayed.
- Change the value using the navigation knob.
- Press the programming key again to memorize the value (the red LED will switch off).
- Move to the next editable parameter using the navigation knob and repeat the procedure.
2.2 Setting Parameters
GENERAL Field:
The GENERAL field includes DATE/TIME and SERVICE settings.
| LEVELS | DESCRIPTION | ADJUSTMENTS |
|---|---|---|
| DATE/TIME | Time Adjustment | 00:00 - 24:00 |
| Current Year Adjustment | XXXX | |
| Current Month Adjustment | 01 - 12 | |
| Current Day Adjustment | 01 - 31 | |
| HOLIDAYS | START YEAR | XXXX |
| Adjust - the current month of the start of the holidays | 01 - 12 | |
| Adjust - the current day of the start of the holidays | 01 - 31 | |
| Adjust - the current year of the end of the holidays | XXXX | |
| Adjust - the current month of the end of the holidays | 12 - 31 | |
| Adjust - the current day of the end of the holidays | 01 - 31 | |
| SUMMER TIME | Adjust - the month for the start of BST | 01 - 12 |
| Adjust - the first day for the start of BST | 01 - 31 | |
| Adjust - the month for the end of BST | 01 - 12 | |
| Adjust - the first month for the end of BST | 01 - 31 |
SERVICE Field:
Note: Some menus are only visible when connected to the relative probe (e.g., DOMESTIC HOT WATER is only visible when storage tank sensor is connected).
| LEVELS | DESCRIPTION |
|---|---|
| RELAY TEST | No relay |
| RELAY 01 | A1: Heating circuit pump 1 |
| RELAY 02 | A2: Heating circuit pump 2 |
| RELAY 03 | A3: Storage tank load pump |
| RELAY 04 | A4: Mixing valve OPEN Heating circuit 2 |
| RELAY 05 | A5: Mixing valve CLOSED Heating circuit 2 |
| RELAY 06 | A6: GC 1 ON |
| RELAY 07 | A7: GC 2 ON (2 levels: GC 1+2 (after 10 seconds) ON) |
| RELAY 08 | A8: Mixer OPEN heating circuit 1/multifunction 1 |
| RELAY 09 | A9: Mixer CLOSED heating circuit 1/multifunction 2 |
| RELAY 10 | A10: Multifunction 3 |
| RELAY 11 | A11: Manifold pump / multifunction 4 |
| SENSOR TEST F1 | Below temperature buffer boiler |
| SENSOR TEST F2 | |
| SENSOR TEST F3 | Above temperature buffer boiler |
| SENSOR TEST F5 | Heating circuit flow temperature 2 |
| SENSOR TEST F6 | Above hot water temperature |
| SENSOR TEST F8 | Heat generator / tank |
| SENSOR TEST F9 | External temperature |
| SENSOR TEST F11 | Heating circuit flow temperature 1, multifunction temp. saving 1 |
| SENSOR TEST F12 | Multifunction temp. saving below hot water temperature 2 |
| SENSOR TEST F13 | Manifold saving solid boiler 2 multifunction temp. saving 3 |
| SENSOR TEST F14 | Manifold 1 multifunction temp. saving temperature 4 |
| SENSOR TEST F15 | Heating circuit room temperature 2 saving, Value measured by the light sensor 0-10 V input voltage value saving |
| OTHER PARAMETERS SW NO XXX-XX | Software number with index |
| CASC MANUAL (1 - 8) | Start single burner levels in cascade |
| BURNER TIME (1 - 8) | Duration of burner operation for all levels |
| BURNER START (1 - 8) | Burner ignition for all levels |
| LIMITER TEST (1 - 8) | Safety limiter test with HG temp. display |
| SERVICE | Enter date / time for maintenance notification |
| RESET USER 00 | (Never use these reset functions) |
| RESET EXP 00 | (Never use these reset functions) |
| RESET PROG 00 | (Never use these reset functions) |
DISPLAY Field:
Note: Some menus are only visible when connected to the relative probe.
| LEVELS | DESCRIPTION |
|---|---|
| SETUP T-OUTSIDE | Outside temperature |
| EXT SETPOINT | External nominal value model (0-10 V) |
| T-HEADER DES | HG / Nominal tank value (cascade) |
| T-HEADER | HG / Tank temperature (cascade) |
| T-HS | Temperature level and HG status (HG1 - HG8) |
| T-SOLID FUEL | In HG 2 = boiler for solid fuels (A ) |
| T-RETURN 1 | Backflow temperature of HG1 |
| T-RETURN 2 | Backflow temperature of HG2 |
| T-BUFFER T | Sample buffer temp |
| T-BUFFER M | HG loading zone buffer temp. |
| T-BUFFER B | Solar area buffer temp |
| T-STORAGE 3 | Tank temperature 3 (e.g. swimming pool solar heating) |
| MOD DEPTH | Degree of modulation |
| DOMESTIC HOT WATER T-DHW DES | Current temperature of hot water sec. progr. |
| T-DHW | Current temperature of the domestic water |
| T-DHW I | Temperature of the DHW boiler in the bottom field |
| T-CIRCL | Circulation backflow temperature |
| HEATING CIRCUIT 1 / 2 T-ROOM DES A | Current nominal room temperature |
| T-ROOM | Current room temperature |
| HUMIDITY (***) | Indication of the room humidity |
| T-POOL DES (*) | Nominal swimming pool temperature |
| T-POOL (*) | Current swimming pool temperature |
| T-DHW DES | Nominal domestic hot water temperature |
| T-DHW (*) | Current domestic hot water temperature |
| T-FLOW DES | Current nominal flow temperature |
| T-FLOW | Current flow temperature |
| N-OPTI-TIME | Last requested period of heating |
| SOLAR / MF T-MF1 | Sensor temperature MF1 (=F11) |
| T-MF2 | Sensor temperature MF2 (=F12) |
| T-MF3 | Sensor temperature MF3 (=F13) |
| T-MF4 | Sensor temperature MF4 (=F14) |
| MF4 | Manifold temperature 1 |
| T-HEADER 1 | Over hot water temperature |
| T-DHW I | Supply hot water temperature |
USER Field:
Note: Some menus are only visible when connected to the relative probe.
| LEVELS | DESCRIPTION | ADJUSTMENTS |
|---|---|---|
| SETUP LANG | Choose Language | ENG |
| CONTRAST | Display brightness setting | 00 (-20) / (20) |
| DISPLAY SEL | Select a supplementary display | ---- |
| SELECT PROG | Choose heating circuit 1 / heat. 2 | 01 (01 - 02) |
| DOMESTIC HOT WATER 1X DHW | Disable dhw times | 00 (00 - 01) |
| T-DHW 1 | Hot water temp. 1 (time period 1) | 60 (10 - 70) |
| T-DHW 2 | Hot water temp. 2 (time period 2) | 60 (10 - 70) |
| T-DHW 3 | Hot water temp. 3 (time period 3) | 60 (10 - 70) |
| BOB VALUE | Solar integration energy savings function | 0 (0 - 70) |
| CIRCL-P-DHW | Enable storage tank recirc | 0 (0 - 1) |
| ANTILEGION | Enable anti-legionella function | 0 (0 - 1) |
| HEATING CIRCUIT 1 / 2 MODE | Operating mode setting | ----- |
| T-ROOM 1 | Room temperature 1 | 20 (5 - 40) |
| T-ROOM 2 | Room temperature 2 | 20 (5 - 40) |
| T-ROOM 3 | Room temperature 3 | 20 (5 - 40) |
| T-REDUCED | Required temperature for night-shift | 10 (5 - 40) |
| T-ABSENCE | Required temperature during holidays | 15 (5 - 40) |
| T-LIMIT DAY | 19 (-5 - +40) | |
| T-LIMIT N | 10 (-5 - +40) | |
| HEATSLOPE | External temp. compensation curve | 1,20 (0 - 3) |
| ADAPTION | Autom. heating curve setting | 0 (0 - 1) |
| ROOM INFL | Effect of room sensor | 10 (0 - 20) |
| T-ROOM ADJ | Thermometer calibration | 0 (5K - -5K) |
| OPT HEAT UP | Heat optimisation | 0 (00 - 02) |
| MAX OPT-TIME | Maximum heating optim. anticipation | 2 (00 - 03) |
| OPT REDUCED | Reduction optimisation | 0 (00 - 02) |
| PC-ENABLE | Enable PC | 0000 (0000 - 9999) |
TIME PROGRAM Field:
This section details how to set time programs for various functions.
- CIRCL TIME: Control time programme for the circulation pump.
- DHW PROGRAM (*): Control time programme for domestic hot water production.
- HTG-PROG 1 1: 1st Heat programme for the first heating circuit.
- HTG-PROG 2 1: 2nd Heat programme for the first heating circuit.
- HTG-PROG 1 2: 1st Heat programme for the second heating circuit.
- HTG-PROG 2 2: 2nd Heat programme for the second heating circuit.
Enter Access Code: Press the programming key to enter the access code for changing or viewing certain parameters.
2.3 Other Possible Settings
Settings for Heating Circuits 1 & 2:
- Heating adjusted to fixed flow temperature: Allows setting a fixed flow temperature without an external probe.
- Heating circuits temperature settings: User configurable after function is set (e.g., T-FLOW DAY).
- Second storage tank: Allows using a heating zone for a second storage tank.
- Second storage tank temperature settings: User configurable (e.g., T-DHW).
- Pool regulator: Allows using a heating zone to heat a swimming pool. Requires a swimming pool sensor.
- Pool temperature settings: User configurable after function is set (e.g., T-POOL 1/2/3).
- Screed programme: For setting a screed-drying program for underfloor heating systems.
- Screed programme temperature settings: User configurable (e.g., SCREED PROGR).
- 0-10 V Signal Usage: Enables external regulation of the climatic curve via a 0-10 V input (conn. F15).
- Curve and temperature settings with 0-10 V signal: User configurable (V-CURVE, CURVE 11-XX).
DHW Circuit Settings:
- Parallel pump operation: Keeps heating pumps running during DHW production.
- Using a storage tank thermostat (on/off): Uses a storage tank thermostat instead of a probe.
- Antilegionella: Enables the antilegionella program.
- Setting for solar manifold use: Uses a PT 1000 probe as a manifold probe.
Table 1: 0-10 V Signal Usage
| N° | U1 | U2 | T1 | T2 | UA |
|---|---|---|---|---|---|
| 0 | 2.0 | 10.0 | 0 | 90 | 2.0 |
| 1 | 2.5 | 0.3 | 38 | 80 | 5.0 |
| 2 | 2.5 | 0.3 | 38 | 75 | 5.0 |
| 3 | 2.5 | 0.3 | 38 | 45 | 5.0 |
| 4 | 4.0 | 0.1 | 20 | 85 | 5.0 |
| 5 | 4.0 | 0.1 | 20 | 75 | 5.0 |
| 6 | 4.0 | 0.1 | 20 | 55 | 5.0 |
| 7 | 4.0 | 0.1 | 30 | 87 | 5.0 |
| 8 | 4.0 | 0.1 | 38 | 87 | 5.0 |
| 9 | 4.0 | 0.1 | 38 | 73 | 5.0 |
| 10 | 4.0 | 0.1 | 38 | 53 | 5.0 |
| 11 | 4.0 | 0.1 | 20 | 90 | 5.0 |
Key: U1 - Min volt, U2 - Max volt, T1 - Min temperature (min volt), T2 - Max temperature (max volt), UA - Off.
2.4 Display Error Codes
When an error occurs, a flashing triangle, fault code, and burner number appear on the regulator screen. Consult the 'Error Search' section in the manual for system error codes.
| Code | Meaning |
|---|---|
| E1 | Thermostat trigger limit |
| E2 | Gas supply pressure low |
| E4 | No flame during burner ignition cycle |
| E5 | No flame during burner operation |
| E6 | Overheat temperature (>95°C) |
| E10 | Internal fault in local control board (EB) |
| E11 | Flame presence detected before burner ignition cycle |
| E12 | Faulty local flow sensor |
| E13 | Faulty flow sensor (HP) |
| E14 | Faulty global return sensor |
| E15 | Difference between global return sensor and local flow sensor of > 30°C (rp +10) |
| E16 | Exchanger temperature very low: probable danger of ice |
| E20 | Flame presence detected after burner is switched off |
| E22 | The air pressure switch does not switch within 30 seconds of the beginning of the burner ignition cycle |
| E23 | Air pressure switch contact always on |
| E24 | Fan speed fault: it does not reach the correct speed within 30 seconds of the beginning of the burner ignition cycle |
| E26 | Fan speed fault: the fan does not stop within 30 seconds at the end of the cycle |
| E27 | The air pressure switch detects a fault during the burner ignition cycle |
| E28 | Obstructed flue pipe |
| E29 | Water in the exhaust chamber, excessive condensate level, check whether the trap is obstructed |
| E30 | Change in parameter settings after electrical interference |
| E32 | Supply voltage below 190 Vac |
| E40 | Poor system water circulation |
| E69 | E8: F5 – flow temperature sensor Heating Circuit 2 |
| E70 | E8: F11 – flow temperature sensor Heating Circuit 1 |
| E71 | E8: F1 – buffer below temperature sensor (Buffer) |
| E72 | E8: F3 – buffer above temperature sensor (Buffer) |
| E75 | E8: F9 – external temperature sensor |
| E76 | E8: F6 – DHW storage tank temperature sensor |
| E78 | E8: F8 – boiler temperature sensor (kf) |
| E80 | E8: F2 – room temperature sensor Heating Circuit 1 |
| E81 | E8: EEPROM error. The value is not valid, it has been replaced with the standard value |
| E83 | E8: F15 – room temperature sensor Heating Circuit 2 |
| E90 | E8: Address 0 and 1 in the BUS. The bus 0 and 1 codes cannot be used simultaneously |
| E91 | E8: BUS code occupied. The set BUS code is already being used by another appliance |
| E99 | E8: Internal fault |
| E135 | E8: F12 – DHW storage tank below temperature sensor MF2 |
| E136 | E8: F13 – Heat Generator 2, manifold 2 MF3 |
| E137 | E8: F14 – Manifold 1, MULTIFUNCTION 4 |
| E138 | E8: F15 – Room temperature sensor Heating Circuit 2 |
| E200 | E8: Safety device intervention (fans at max rpm) / Communication error module 1 |
| E201 | E8: Communication error module 2 |
| E203 | E8: Communication error module 3 |
| E204 | E8: Communication error module 4 |
| E205 | E8: Communication error module 5 |
| E206 | E8: Communication error module 6 |
| E207 | E8: Communication error module 7 |
| E17 | BCM: Frozen exchanger (<2°C) |
| E18 | BCM: Flow T Delta - Return 10° greater than Max dt parameter |
| E19 | BCM: Flow probe over temperature (>95° C) |
| E37 | BCM: Internal fault |
| E38 | BCM: Settings corrupted by electromagnetic interference |
| E56 | BCM: No remote control detected |
| E57 | BCM: No E8 detected |
| E58 | BCM: Global flow sensor faulty. |
3 Quick Setup
This section provides simplified procedures for common setup tasks.
Expert Quick Setup
Navigating the EXPERT menu for quick adjustments:
- SETUP: Access general settings.
- HOT-WATER: Adjust domestic hot water parameters.
- HEATING CIRCUIT I/II: Configure heating circuit settings.
- SOLAR M/F: Manage solar and multifunctional relay settings.
Example adjustments include HC FUNCTION, PUMP FUNC, MIXER OPEN/CLOSED, MAX/MIN T-FLOW, etc.
User Quick Setup
Navigating the USER menu for quick adjustments:
- INSTALLATION: Access installation-related settings.
- HOT-WATER: Adjust DHW parameters like 1X HOT-WATER, T-DHW DES 1/2/3.
- HEATING CIRCUIT I/II: Adjust room temperatures (T-ROOM DES 1/2/3), T-REDUCED, T-ABSENCE, T-LIMIT DAY/N, HEATSLOPE.
Time Program Setup
Set time programs for circulation pump, DHW, and heating circuits.
- CIRCL TIME: Control time programme for the circulation pump.
- DHW PROGRAM (*): Control time programme for domestic hot water production.
- HTG-PROG 1 1: 1st Heat programme for the first heating circuit.
- HTG-PROG 2 1: 2nd Heat programme for the first heating circuit.
- HTG-PROG 1 2: 1st Heat programme for the second heating circuit.
- HTG-PROG 2 2: 2nd Heat programme for the second heating circuit.
Choose the day: Select days (MONDAY to SUNDAY, MON-FRI, SAT-SUN, MON-SUN) and choose on/off times.
External Temperature Compensation Graph: Illustrates the relationship between external temperature and flow temperature.
Notes and Contact Information
This manual serves as an integration to simplify operations and understanding, and does not replace the main E8 Thermo Controller manual.
For electrical connections, always consult the boiler installation manual.
During the service life of the product, performance may be affected by external factors such as water hardness, atmospheric agents, and system deposits. Declared data refers to new products correctly installed and used according to regulations.
Correct periodic maintenance is highly recommended.
Contact Alpha Therm Limited for Technical Help or Service:
- Website: www.alpha-innovation.co.uk
- Email: info@alpha-innovation.co.uk
- Alpha Helpline: 0844 871 8764
Alpha Therm Limited, Nepicar House, London Road, Wrotham Heath, Sevenoaks, Kent TN15 7RS.
ISO 9001 certified company.
