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BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER
5.2
SECOND SERVICE LEVEL (ENTER AT THE FIRST SERVICE LEVEL AND PRESS THE
ECO BUTTON AND SIMULTANEOUSLY FOR 3 SECONDS)
Description
8.A
Software version
8.b
Code plug number
8.C
GFA status (not applicable)
8.d
GFA error (not applicable)
8.E
Reset all parameters
8.F
Permanent ignition
9.A
Operation mode permanent
9.b
Actual fan speed
9.C
Actual heat output
9.d
9.E
Start fan speed
Turbine signal delay (combi only)
9.F
Pump over-run time (CH mode)
Tab. 7 CDi Service - second level
-
-
00
Display
CF ** **
-- ** **
00-01
00-02
*..** (Hz)
** (%)
45-55
02-08
00-03
-
Range adjustable from - to/
Description
-
-
1000-4000; corresponds to digits 7 to 10 of order number for example: 8 714 411 062 0
0 (must be stored in order to set all parameters to factory settings)
0 = off
1 = on (Do not run for more than 2 minutes!)
0 normal
1 min
2 max
-
0-U0
45-55 Hz
2-8 [quarter seconds] (corresponds to 0.5-2 sec)
0-3 min
Reset Value
(after parameter reset) read only read only read only read only
00
00
00 read only read only
50 Hz
04 (corresponds to
1 sec)
03
5.3
EXPLANATION OF SERVICE FUNCTIONS
5.3.1
FIRST SERVICE LEVEL
1.A MAX. OUTPUT (HEATING)
The heating output can be set to any level between min. rated heat output and max rated heat output to limit it to the specific heat requirements.
Even if the heating output is limited, the full rated heat output remains available for hot water.
The factory setting is maximum rated output – it depends on appliance type.
1.B MAX. OUTPUT (HOTWATER - COMBI ONLY)
The hot water output can be set to any level between minimum rated hot water output and maximum rated hot water output to limit it to the specific hot water requirements.
The factory setting is maximum rated output – display shows U0.
1.C PUMP MAP (HEATING)
(COMBI & SYSTEM ONLY)
The appliance is supplied with this function set to
4 (Proportional pressure high). See pump characteristics below.
The pump map indicates how the pump is controlled in heating mode. The pump switches between the various pump speeds so as to reproduce the characteristic curve selected.
Changing the pump characteristic can be helpful if a lower pressure difference will guarantee the necessary circulation on the basis of the system dimensions and pump characteristic.
8 716 115 748 (2009/09) 19
BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER
In order to save as much energy as possible and to minimise the possibility of water circulation noise, a low characteristic should be chosen.
The pump map can be selected within:
•
0 (Pump step adjustable), see service function
1.d (Map pump step (heating))
•
1 (Constant pressure high)
•
2 (Constant pressure middle)
•
3 (Constant pressure low)
•
4 (Proportional pressure high)
•
5 (Proportional pressure low)
The factory setting is:
1.C Pump map (heating) 4 (Proportional pressure high)
H
(bar)
0,6
0,5
0,4
0,3
1
2
3
0,2
0,1
0
0 200 400 600
Fig. 12 Constant pressure
800 1000 1200 1400 1600
Q (l/h)
H
(bar)
0,6
0,5
0,4
0,3
0,2
0,1
4
5
0
0 200 400 600 800 1000 1200 1400 1600
Q (l/h)
Fig. 13 Proportional pressure
1-5 Characteristics
H Pressure
Q Water circulation rate
If this parameter is set to 0 then the pump speed set under function 1.d (Map pump step (heating)) is active.
1.D MAP PUMP STEP (HEATING)
(combi & system only)
This service function corresponds to the pump speed switch used on conventional heating pumps.
However, the setting is only active if function 1.C (Pump map (heating)), is set to 0.
The factory setting is:
1.d Map pump step (heating) 7
0,6
H
(bar)
0,5
0,4
0,3
0,2
2
3
4
5
6
7
0,1
0
0 200 400 600 800 1000 1200 1400 1600
Q (l/h)
6 720 612 126-45.1O
Fig. 14 Characteristics
2-7 Characteristics
H Pressure
Q Water circulation rate
20 8 716 115 748 (2009/09)
•
1.E PUMP SWITCH MODE
The choice of settings is as follows:
•
Control Mode 1
For heating equipment without a control unit.
The pump is controlled by the central heating flow temperature control.
•
Control Mode 2 (factory setting)
For heating systems with room thermostat.
The central heating flow temperature control controls only the gas, the pump is not affected. The room thermostat controls both the gas and the pump.
The pump and fan have an over-run time of between
15 s and 3 min.
•
Control Mode 3
Not applicable
2.B MAX. FLOW TEMPERATURE
The maximum CH flow temperature can be set to between 35 °C and 88 °C (factory setting). Even if the
CH flow temperature control is set higher, the setting entered for 2.b (Max. flow temperature) is not exceeded.
2.C AIR PURGE MODE
The first time the appliance is switched on, a once-only venting function is activated. The heating pump then switches on and off at intervals. This sequence lasts about 8 minutes.
The 2-digit display shows in alternation with the CH flow temperature.
The automatic vent will open during venting and then close once the venting sequence is complete.
The venting function can be activated manually after servicing.
If the venting function is set to “On” (with automatic deactivation), the function is set to “Off” once the sequence has been completed
2.F OPERATING MODE
There are 3 operating modes to choose from.
•
Normal mode: the appliance operates according to the commands received from the programmer. The display shows 0.
•
Minimum mode: the appliance runs constantly at minimum output.
The display shows 1. The 2-digit display alternates between the CH flow temperature and . After
15 min the minimal mode changes to normal mode.
BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER
• Maximum mode: the appliance runs constantly at maximum output.
The display shows 2. The 2-digit display alternates between the CH flow temperature and . After
15 min the maximal mode changes to normal mode.
3.B ANTI-CYCLE TIME
The anti-cycle time is factory set to 3 minutes.
The shortest possible anti-cycle time is 1 minute
(recommended for single-pipe and hot-air heating systems).
If the setting 0 is entered, the anti-cycle time is inactive.
B Enter the anti-cycle time on the commissioning record enclosed with the appliance.
3.C ANTI-CYCLE FLOW TEMPERATURE DIFFERENTIAL
The switching difference is the permissible differential from the specified CH flow temperature. It can be set in increments of 1 K. The adjustment range is 0 to 30 K (is factory set to 10 K). The minimum CH flow temperature is 35 °C.
Note: 1K =^ 1 °C.
B The switching difference setting should be entered on the commissioning record supplied with the appliance.
3.E CYCLE TIME (HOT WATER) (COMBI ONLY)
The appliance is supplied with the pre-heat cycle time set to 20 minutes.
After pre-heating or DHW demand, this function will stipulate the period of time before the next permissible pre-heat. This will prevent excessive pre-heat cycling.
3.F BURNER OFF AFTER DHW DEMAND (HOT WATER)
(COMBI ONLY)
The appliance is supplied with the hot water duration set to 1 minute.
The “hot water duration” time specifies how long, after hot water has been drawn, that the heating mode remains disabled.
8 716 115 748 (2009/09) 21
BOILER SERVICE FUNCTIONS - CDI COMBI & SYSTEM BOILER
4.F SYPHON-FILL PROGRAMME
The syphon filling function ensures that the syphon trap is filled when the appliance is first installed or shut down for a long period. Flue gas is prevented from escaping into the room that the appliance is installed.
The syphon filling function is activated when:
• the appliance is switched on at the main switch
• the burner has not been in operation for at least
48 hours
• the appliance is switched from summer to winter mode
The next time the heating or hot water system calls for heat, the appliance is held at minimum output for
15 minutes.
The syphon filling programme remains active until the appliance has completed 15 minutes of operation at minimum output.
The 2-digit display alternates between and the CH flow temperature.
If the syphon is not filled, flue gas can escape!
B Only deactivate the syphon filling programme in order to carry out servicing work.
B Always re-activate trap filling programme once servicing is complete.
5.A RESET SERVICE REMINDER
The burner service interval of 2324 hours has run out.
After the service inspection store 0 for resetting the service interval.
5.B FAN OVER-RUN TIME
Set the time of fan over-run after a boiler demand.
6.A LAST FAULT
The last fault can also be recalled for servicing purposes when the appliance is functioning correctly.
6.D ACTUAL FLOW RATE TURBINE (COMBI ONLY)
The actual flow rate of the turbine is displayed.
6.E PROGRAMMER INPUT
Shows the status of channel 1 of the timer DT10/20.
Left digit is “Heat demand”, heating mode will be activated according to the programmer commands.
Shows the status of channel 2 of the timer DT20.
Right digit is “DHW demand”, hot water mode will be activated according to the programmer commands.
7.A FAULT INDICATOR LED ON/OFF
The fault indicator LED flashes in case of error even when its setting is off (0).
5.3.2
SECOND SERVICE LEVEL
8.A SOFTWARE VERSION
The version number of the software is displayed.
8.B CODE PLUG
The 4-digit part number of the code plug (digits no. 7 up to 10 of order no.) is indicated.
The code plug determines the appliance functions. If the appliance is converted from natural gas to LPG or vice versa (using conversion kit) the code plug also has to be changed.
8.C GFA STATUS
(not applicable)
8.D GFA ERROR
(not applicable)
8.E RESET ALL PARAMETERS
Set all parameters to factory setting. See also section 3.6.
8.F PERMANENT IGNITION
This function allows permanent ignition without gas supply to be activated for the purposes of checking the ignition mechanism.
Do not run for more than 2 minutes!
9.A OPERATION MODE PERMANENT
Set a fixed operation mode even when boiler has been switched off.
9.B ACTUAL FAN SPEED
The current fan speed is displayed in Hertz (Hz).
9.C ACTUAL HEAT OUTPUT
The actual heat output of the appliance at the time viewed is displayed.
9.D START FAN SPEED
The actual start fan speed between 45 and 55 Hz is displayed in Hertz (Hz).
9.E TURBINE SIGNAL DELAY (COMBI ONLY)
Set a delay time relates to the beginning of DHW demand to avoid an undesired demand by water surge hammer.
9.F PUMP OVER-RUN TIME (CH MODE)
Set the time of pump over-run after the end of a heating demand.
22 8 716 115 748 (2009/09)
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