Siemens QAA73 User manual

Pag. 1/5

17.10.2008 Service instructions Lmu34 sw 2.09

Condensing gas boilers

NOVADENS …

USING THE SIEMENS TEMPERATURE

REGULATOR QAA73 TO PROGRAM

BOILERS PARAMETERS

Pag. 2/5

17.10.2008 Service instructions Lmu34 sw 2.09

The editable parameters are those between 504 and 652 (parameters 650 and 652 are reading only

parameters).

Proceed as follows to access this parameters:

1) Simultaneously press keys 1-4on QAA73 temperature regulator for about 3 seconds. The

“Initialising BMU parameters” appears on the display (line 725).

2) Simultaneously press keys 1-2on QAA73 temperature regulator for about 3 seconds. The

“Initialising BMU SERVICE” (line 504 “TkSmax”).

3) Press keys 1-2to scroll through the list of parameters.

4) To change the value of the selected parameter, press key 3-4 to decrease or increase the value

respectively.

5) Press key 5 to enter the new values and exit programming of the boiler’s electronic main board.

DEFAULT PARAMETERS LIST

NOVADENS

1.240

240

280

QAA73

parameters

Description of parameters

20/24 kW

24/28 kW

Pag. 3/5

17.10.2008 Service instructions Lmu34 sw 2.09

504

Maximum flow setpoint temperature (°C)

516

Summer / winter changeover temperature

532

Heating curve slope heating circuit HC1

534

Room temperature adjustment (°C)

536

Maximum speed (rpm) at maximum output in heating mode

(maximum speed limitation)

5900

4300

5050

541

Maximum degree of modulation in heating mode (%)

100

544

Overrun time (s) of pumps

180

545

Minimum burner pause time (s)

(heat demand-dependent switching hysteresis)

180

555.0

Chimney sweep function

ON =active

OFF=deactivate

OFF

555.1

Legionella function

ON =active

OFF=deactivate

555.2

Setting

ON = hydraulic differential pressure switch

OFF = pressure switch

OFF

555.3…555.7

NOT used

608

Setting value of modulation air at ignition load (PWM%),

609

Setting value of modulation (PWM%) air at low-fire; lower limit

modulation range

610

Setting value of modulation (PWM%) air at high-fire; upper limit

modulation range

100

611

Setting value of required speed (rpm) at ignition load

4500

4300

4400

612

Setting value of required speed (rpm) at low-fire

1850

1600

2000

613

Setting value of required speed (rpm) at high-fire

5900

5100

5900

DEFAULT PARAMETERS LIST

NOVADENS

1.240

240

280

QAA73

parameters

Description of parameters

20/24 kW

24/28 kW

Pag. 4/5

17.10.2008 Service instructions Lmu34 sw 2.09

614

Open Therm input setting (QAA73)

0= only with QAA73

1= with Low Voltage room thermostat RT or QAA73

2= factory default –only for LUNA IN models

641

Setting value post purge time (s)

677

Preset output BMU (controller stop function)

max = 100 %

min = 0 %

678

MANUFACTURE information

205

202

205

651

Hydraulic system adjustment

652

MANUFACTURE information

1240

2242

2280

ONLY READING PARAMETERS

700 **

1st previous fault code counter

-----

702

1st internal previous fault code

-----

703 **

2nd previous fault code counter

-----

705

2nd internal previous fault code

-----

706 **

3rd previous fault code counter

-----

708

3rd internal previous fault code

-----

709 **

4th previous fault code counter

-----

711

4th internal previous fault code

-----

DEFAULT PARAMETERS LIST

NOVADENS

1.240

240

280

QAA73

parameters

Description of parameters

20/24 kW

24/28 kW

Pag. 5/5

17.10.2008 Service instructions Lmu34 sw 2.09

712 **

5th previous fault code counter

-----

714

5th internal previous fault code

-----

715

Actual fault code counter

-----

** The counter shows the number of times of same error happened

728

HMI code of 1st previous error counter

-----

729

HMI code of 2nd previous error counter

-----

730

HMI code of 3rd previous error counter

-----

731

HMI code of 4th previous error counter

-----

732

HMI code of 5th previous error counter

-----

733

HMI code of actual error counter

-----

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