Worcester 28i Junior Spezifikationen PDF herunterladen (Seite 11)

Commence normal

central heating mode

until temperature

reaches 20°C

34

There is a delay of 6 seconds,

pump pulses for 2 seconds,

60 second wait,

2 second pump pulse,

60 second wait,

pump pulses for 2 seconds.

OVERRUN FUNCTION

Run pump

4 min ON

30 min OFF

END DHW

DEMAND

END CH

DEMAND

Pump runs

for

3 minutes

AUTOFROSTAT FUNCTION

Monitor

central

heating

sensor

Below

5°C

5°C

to

9°C

Above

9°C

No demand

and primary

temperature

below 8°C

Internal

"Autofrostat"

demand

Return to

normal off

state

Fan low speed

35 seconds

Fan low speed if

primary temp

above 85°C until

below 80°C.

11

Fig. 9. Wiring diagram.

Control Board

Fan

Flame

sense

electrode

Spark

electrode

Spark

Generator

Mains in

Link

Black 6.3mm tag Common

White 4.8mm tag Low Speed

Red 2.8mm tag High Speed

Flow

turbine

ST16

2 blue

2 orange

2 brown

brown

blue

blue

brown

green

2 yellow

2 red

ST2

ST15

ST1

Pump

Gas valve

white

black

Earth tabs

CH

sensor

Air

Pressure

Switch

2 green

white

black

Regulator

Valve

Safety

Valve

red

white

green/yellow

2 violet

Safety

Valve

DHW

sensor

Overheat cut-off device

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 21 22

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