1001

Burner Pressure C.H. and D.H.W.

8.6To Range Rate the Boiler C.H. (not required for standard installations).

The boiler can be range rated for an output from 11.8 kW up to 27.9 kW. When the boiler is supplied it is factory set at the maximum output 27.9 kW.

Procedure

a.Release the control panel fixing screws (fig. 30) and lower panel.

b.Loosen the screw in the burner pressure test point (fig. 22) and attach a gauge.

c.Switch on the electricity supply to relight the main burner.

Balance tube

Test point burner pressure

Gas valve

Modureg

Fig. 22

Gas inlet pressure test point

Note 1 - Modulation is available on central heating, so the procedures must be carried out while the system is relatively cold. Recheck boiler thermostat is set to maximum.

d.Adjust the potentiometer P1 on the PCB (fig. 24) in the control panel until the required burner pressure is obtained (Anticlockwise to reduce the pressure).

Note 2 - The range of inputs with corresponding burner pressure is given on the Data badge which is situated behind the top front panel. Further informations is on (fig. 23).

e.With the pressure set, turn off the electrical supply and mark the set input on the Data badge (with sticker supplied).

Burner Pressure C.H. and D.H.W.

P1 =C.H. range rating to be set on site

P2 =D.H.W. temperature (factory set, not to be adjusted)

P1 Adjust with screwdriver!

12 11 10 9

8

7

6

5

4

3

2

1

4

3

2

1

6

5

4

 

2

1

 

230V

X1

 

 

 

 

 

 

 

 

 

 

 

X4

 

 

 

 

 

 

 

50Hz

 

 

 

 

 

 

 

 

 

 

 

X2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

8

7

6

5

4

3

2

1

MIN

 

P1

 

MAX

MIN

P2

MAX

 

 

 

 

 

 

 

 

 

 

 

 

Pressure

 

Minimum

 

Maximum

 

settings

 

 

mbar

 

mbar

 

 

 

 

 

 

 

Natural Gas

 

3.0

 

15.0

 

 

 

 

 

 

 

L.P.G.

 

6.9

 

34.5

 

13 12

10 9

7

6

5

3

2

1

X5

 

 

 

 

 

 

 

 

 

2

1

 

 

 

 

 

 

 

X3

X7

 

 

 

 

 

 

 

 

 

 

L7

P1

P2

RY1

RY2

JP1

X8

TR1

31

X6

2AT

F1

RY4

JP4

Fig. 23

21

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Optima Company 1001 installation instructions Burner Pressure C.H. and D.H.W, Procedure
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1001 specifications

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