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Betacom c Engineer Support

Welcome to the Engineer Technical Support section. Please use the different sections below to find answers to your technical questions. You can also find a range of useful contact numbers, including Technical support, here.  

 

Fault Finding diagram

 

 

Fault Finding Information

 

 

Wiring Diagram

Fault Finding Information

Dip Switch Adjustments

DS1 & DS7 is used for gas selection

DS2: Pump Working Mode Selection

OFF: Pump works continuously in CH mode ( factory setting )

ON : Pump stops 45 secs. after burner shuts down

 

 

DS3: DHW Mode / CH Mode Transition Time Selection

OFF: Waiting 45 secs. in DHW mode, in case any DHW demand occurs

ON: Instant transition from DHW to CH

DS4: Combi Type Selection

OFF: Standard Combi

ON: Combi with extra water storage tank

 

 

DS6: Floor Heating Selection

OFF: 30-85°C CH temp. Mode

ON: 30-50°C CH temp. mode

 

 

 

 

 

 

 

 

P7= Ignition capacity adjustment set to 4 0 clock position which is approx 4 to 5 m/bars

 

P5 Antifast cycle position set to 12 0 clock = 45 seconds.

P2 Central heating capacity adjustment. Clockwise capacity increases. Set to 4 0 clock position

 

 

 

  • FAN = 80 W With hall effect function integrated
  •  
  • VOLTAGES
  •  At Rest
  • White 4.5 VDC
  • Grey 0
  • Red 4.5 VDC
  • Running
  • White 2.7 VDC
  • Grey
  • Red 2.7 VDC

  

 

 

FULL FLAME – 10 VDC APPROX

LOW FLAME – 3.5 VDC APPROX

BURNER PRESSURESEV1, EV2 coils 230 VAC

 

24 = 2.0 – 12.5 mbars

30 = 3.5 – 14 mbars

Coil resistance Ev1 and Ev2  = 7 kohms

 

COMPONENT SPEC

DOMESTIC HOT WATER SENSOR

 

AT REST

RED      -  4.6 VDC

WHITE  – 0

GREY    – 0 OR 4.5 VDC DEPENDING ON POSITION WHERE SPINNER LANDS ON SENSOR

 

 

OPERATING

RED      -  4.6 VDC

WHITE  – 0

GREY    – 2.1 VDC

 

 

 

 

 

LOW PRESSURE SWITCH

 

34 VDC @ 1.6 BAR

 

BETACOM C

 

DIP SWITCH CONFIGURATION

 

Dipswitches 1 & 7 used for gas selection

NG         Dip 1 OFF       Dip 7 OFF

LPG       Dip 1 OFF       Dip 7 ON

 

Dipswitch 2 used for pump selection mode

OFF – Pump runs continuously in CH mode (Factory setting)

ON  - Pump stops 45 seconds after burner shuts down

 

Dipswitch 3 used for ‘waiting’ time after DHW drawn

OFF – Waits for 45 seconds if DHW drawn while in CH mode before firing again for CH (Factory setting)

ON – Instant transition from DHW to CH

 

Dipswitch 4 used for combi type selection

OFF – Standard combi (Factory setting)

ON  - Extra DHW storage tank – Not an option in UK

 

Dipswitch 5 used for additional pump selection

OFF – Pump working in CH mode (Factory setting)

ON  - Combi pump not working in CH mode. Additional pump(s) can be connected to system (zones) – Not an option in UK

 

Dipswitch 6 used to adjust maximum heating temperature

OFF – 30 - 85°C (Factory setting)

ON  - 30 - 50°C

 

Dipswitch 8 used to set maximum fan speed

OFF – 24KW

ON  - 28KW

 

POTENTIOMETER ADJUSTMENTS

 

P7 – Ignition burner pressure adjustment

Set at 4 o’clock position = 5 > 6 mbars

 

P5 – Cycling time adjustment

Set at 12 o’clock position

 

P2 – Range rating

 

P4 – Not used

VOLTAGES

 

Fan Hall effect sensor

Measured at PCB. Red wire at connection CN4. White & Grey wires at connection X14.

At Rest

White – 4.5 vdc

Grey   – 0 vdc

Red     – 4.5 vdc

Running

White – 2.7 vdc

Grey   – 0 vdc

Red     – 2.7 vdc

 

Gas Valve

EV1 & EV2 coils – 230 vac

Modulator coil – 17 vdc maximum

Full flame – 10 vdc approx

Low flame – 3.5 vdc approx

Burner pressures

24 = 2.0 – 12.5 mbars

30 = 3.5 – 14 mbars

 

3 Way Valve motor

Motor drives out for CH & drives in for DHW

CH demand

White – 230 vac

Red    – 0.5 vac

Black – 0.5 vac

DHW demand

White – 0.5 vac

Red    – 230 vac

Black – 0.5 vac

 

DHW Flow Sensor

At Rest

Red    – 4.6 vdc

White – 0 vdc

Grey   – 0 or 4.5 vdc

Running

Red    – 4.6 vdc

White – 0 vdc

Grey  – 2.1 vdc

 

Loss of Water Pressure Switch

34 vdc @ 1.6 BAR

 

MAXIMUM FLUE LENGTHS

24 KW – Horizontal = 3m – Restrictor required up to 1m

             – Twin flue = 20m – Restrictor required up to 2m

30 KW – Horizontal = 3m – Restrictor required up to 1m

             – Twin flue = 20m – Restrictor required up to 1m

 

Sequence of Operation

DOMESTIC HOT WATER DEMAND

1 ) Mains on LED will be illuminated.

2 ) Domestic hot water temperature control turned up above set point.

3 ) Summer winter control turned to summer / summer and winter position.

4 ) With the tap turned on the flow switch should  make and 2.1vdc on the grey wire should be recorded at the X10 connection on the  PCB indicating that the hall effect flow switch is spinning.

5 ) The motorized valve will motor (  out ) with 240 volts ac recorded  between red and black on J14/15 on  X19 of the PCB.

6 ) The pump and fan will run ( 240 volts ac ). At X12 ( J 16/17 pump ) ( J 19/20 fan ).

7 ) With the fan and pump running, the air pressure switch will operate and 30vdc  approx will be recorded at both wires on the  PCB air pressure switch connection. Test to earth X16 J64/65

8 ) The gas valve solenoid will be energised, and the spark generator will commence sparking and the boiler should fire. The sparking will continue for 3 seconds after ignition and then cease.

9 ) The gas valve modulator  will modulate dependant upon the resistance of the domestic hot water thermister from 13 volts  dc full flame down to 3.5 volts dc low flame.

10 )  At the end of domestic hot water the pump will run for a further 3 seconds, and the fan will continue to  run for  45 seconds.

 

CENTRAL HEATING

1 ) Mains on LED will be illuminated.

2 ) With inbuilt timer and any external controls ( room stat ) calling for heat.

3 ) With the summer / winter  control turned to the summer / winter position.

4 ) With the heating temperature control turned up above set point.

5 ) The motorized valve will motor ( in ) with 240 volts ac recorded between white and black on the X 19 ( J 13/15 ) connection of the  PCB.

6 ) The fan and pump will run 240 volts ac at X 12 ( J16/17 pump ) ( J 19 /20 fan ).

7 ) With the fan and pump running, the air pressure switch will operate with 30 volts dc at both connections. Test to earth on X16 ( J 64/65 ).

8 ) The gas valve will be energised, and the spark generator ( on the  PCB ) will commence sparking and the boiler should fire. The spark generator will continue for a further 3 seconds and then cease.

9 ) The gas valve modulator will modulate dependent on the resistance of the heating thermister from 13 volts dc full flame down to 3.5 volts dc low flame.

10 ) Once the temperature of the heating has reached set point the burner will switch off and the fan will continue to run for 45 seconds.

11 ) At the end of a call for heating ie time clock off time reached the fan will run for 45 seconds and the pump will overrun for 10 seconds.

NB The three way valve will return to the domestic hot water position.

 

Domestic hot water demand while central heating is on.

1 ) Tap turned on should make and 2.1 vdc on the grey wire should be recorded at the  PCB indicating that the hall effect flow switch is spinning.

2 ) The motorized valve will motor  ( in ) with 240 volts ac recorded between red and black on the  PCB.

3 ) The fan and pump will not be interrupted and will continue to run. The main burner will continue ensuring a smooth transition between heating and hot water.

 

4 ) At the end of domestic hot water  the burner will switch off and the pump and fan will continue to run, after 15 seconds the pump will stop but the fan will continue  for a further 30 seconds, and then switch off. After 5 seconds the three way valve will move to heating position ( out ) with 240 volts ac recorded between white and black of the PCB. 

The pump and fan will now run and the boiler fire to continue the heating request. 

Fault Codes

 

Fault Diagnostic Lights

SOLID light means Temperature Range

FLASHING light means Lockout Fault

 

Gas Settings

Roomstat Wiring

Available Literature

 

Installation ManualUser Manual

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