Junkers ZWE 24-5 MFA Manuale utente
2| Contents
Contents
1. 7.
8.
9.
7.1
7.1.1
7.1.2
7.1.3
7.1.4
7.1.5
7.2
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
7.2.7
7.2.8
7.2.9
7.2.10
7.2.11
7.2.12
7.2.13
7.2.14
7.2.15
7.2.16
7.2.17
7.2.18
7.2.19
7.2.20
8.1
8.1.1
8.1.2
8.2
8.3
8.4
2.
3.
4.
5.
6.
2.1
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
3.1
3.2
3.3
3.4
3.4.1
3.4.2
4.1
4.2
4.3
4.4
4.5
5.1
6.1
6.2
6.3
5.2
1.1
Safety precautions and symbols Gas setting values
Temperature sensor resistance values
Display Symbols
ZWE 24/28-5 MFK/MFA/MFAE types
ZWE 24-5 MFK types
ZWE 24-5 MFA types
ZWE 24-5 MFAE / NGVM 24-4 types
ZWE 28-5 MFA / 29 VRC types
ZWE 28-5 MFAE / NGVM 28-4 types
ZWC/ZSC 18/21/24/28/30/35-5 MFK/MFA
ZWC/ZSC 18-3 MFK types
ZWC/ZSC 24-3 MFK/MFKP and
ZWC/ZSC 24/28-3 MFK Dual output types
ZWC/ZSC 28-3 MFK types
NGLA / NGLS 28-4 types
ZWC/ZSC 21-3 MFA types
ZWC/ZSC 24-3 MFA/MFAP types
ZWC/ZSC 24-3 MFA/MFAP and
ZWC/ZSC 28-3 MFA types
ZWC/ZSC 28-3 MFA/MFAP types
ZWC/ZSC 28-3 MFA/MFAE types
ZWC/ZSC 35-3 MFA types
ZWC/ZSC 35-3 MFA types
ZWC/ZSC 35-3 MFAE and NGVA 35-4 types
ZWC/ZSC 24-3 MFAM types
ZWC/ZSC 24-28-3 MFAM Dual output types
NGVA/NGVS 28-4 types
ZWC/ZSC 30-3 MFAM types
ZWC/ZSC 35-3 MFAM types
ZWC/ZSC 35-3 MFAM and NGVA/NGVS
CH flow NTC
ZWC/ZSC - 3 and NGVA/NGVS - 4
ZWE - 5 and NGVM/NGLM - 4 types
DHW NTC
Flue gas NTC
Combustion chamber NTC
35-4 types
NGLA/NGLS 24-4 types
NGVA/NGVS 24-4 types
MFAP/MFAE/MFAM types
Appliance layaut and hydraulic diagrams
Heatronic 3 functions
Electrial wiring diagrams
Electrial values
Troubleshooting
Appliance layaut
ZWE 24 / 28 - 5 MFA / MFAE
ZWE 24 - 5 MFK
ZWC 21/24/28/30/35-3 MFA/MFAP/MFAE/MFAM
ZSC 21/24/28/30/35-3 MFA/MFAE/MFAM
ZSC 21/24/28/30/35-3 MFA/MFAE/MFAM
ZWC 18/24/28-3 MFK/MFKP
ZSC 18/24/28-3 MFK
Temperature display
Failure display
Private working programme display
Service Functions
1st level service functions
2nd level service functions
ZWE 24/28-5 MFA/MFAE types
ZWE 24-5 MFK types
ZWC/ZSC 21/24/28/35-3 MFA/MFAP/MFAE types
ZWC/ZSC 24/28/30/35-3 MFAM types
ZWC/ZSC 18/24/28-3 MFAK/MFKP types
ZWE 24/28-5 MFA/MFAE and ZWC/ZSC
How to use error codes
Failure display
Error codes
ZWE 24-5 MFK and ZWC 18/24/28-3
MFK/MFKP types
21/24/28/30/35-3 MFA/MFAP/MFAE/MFAM types
ZWC 18/24/28 MFK/MFKP
ZSC 18/24/28 MFK
Hydraulic diagrams
ZWE 24/28-5 MFA/MFAE
ZWE 24-5 MFK
ZWC 21/24/28/30/35-3 MFA/MFAP/MFAE/MFAM
Symbols
Safety precautions
3 5 5
8 4
8 6
55
55
57
59
59
62
63
63
64
66
67
69
70
71
72
74
74
75
77
78
79
81
81
82
82
83
83
84
84
84
85
85
85
4
1 6
2 0
2 5
2 9
29
29
31
20
21
22
23
24
25
27
16
16
16
17
17
19
4
4
5
6
7
8
9
10
10
11
12
13
14
15
3
3
1.2
6 720 660 238 (2008/07)
2
6 720 660 238 (2008/07) 3
1 Safety precautions and symbols
1.1 Safety precautions
Danger on smelling gas
Turn off gas service cock (page 25).
Open the windows.
Do not operate any electrical switches.
Extinguish any naked flames.
Leave the building and call up your gas company and
authorized dealer from an outside phone .
Danger on smelling fumes from the appliance
Switch off the appliance (page 26).
Open windows and doors.
Inform your heating engineer.
Fitting and Modifications
Fitting of the appliance or any modifications to the
appliancemayonlybecarried out by a competentper-
son.
Flue systems must not be modified in any way.
If the appliance has a type B.. flue system:Ventila-
tion openings in doors, windows and walls must not
be sealed or restricted. If draught-proof windows are
installed, measures must be taken to ensure there is
an adequate supply of air to the appliance for com-
bustion.
Inspection/Maintenance
We recommend that you take out a
maintenance contract with a competent installer and
have the appliance serviced at regular intervals.
Inspections-/
The operator is responsible for the general and envi-
ronmental safety of the system.
Only use genuine spare parts!
Combustible materials
Donotstoreor useanycombustible materials(paper,
thinners, paints etc.) in the vicinity of the appliance.
Combustion Air/Ambient Air
Keep combustion air/ambient air free of corrosive
substances (e. g. halogenated hydrocarbons which
contain chlorine or fluorine compounds). In this way
corrosion can be prevented.
Instructions to the customer
Instruct the customer in the use of the appliance and
how its works.
Point out to the customer that he/she must not carry
outanyrepairsormodificationstotheappliance.
1.2 Symbols
Signal words indicate the seriousness of the hazard in
terms of the consequences of not following the safety
instructions.
•Caution indicates that minor damage to property
could result.
•Warning indicates that minor personal injury or seri-
ous damage to property could result.
•Danger indicates that serious personal injury could
result. In particularly serious cases, lives could be at
risk.
Notes contain important information in cases where
there is no risk of personal injury or damage to property.
Safety instructions in this document are
identified by a warning-triangle symbol and
are printed on a grey background.
Notes are identified by the symbol shown
on the left. They are bordered by horizontal
lines above and below the text.
3|
Safety precautions and symbols
2.1.1 ZWE 24/28-5 MFA/MFAE
2. Appliance layout and hydralic diagrams
2.1 Appliance layout
Fig. 1
3Testing point (injector pressure)
4Heatronic 3
6Temperature limiter for heat exchanger
6.3 Temperature sensor for hot water
7Testing point for gas supply pressure
8.1 Pressure gauge
15 Safety valve (CH system)
18 Central heating pump
18.1 Pump speed selector switch
20 Expansion vessel
27 Automatic air vent
29 Burner with injector manifold
32 Flame sensing electrode
33 Igniter electrodes
36 Temperature sensor in CH flow
38 System filling loop
43 CH flow
56 Gas valve
63 Adjusting nut for max. gas inlet flow volume
64 Adjusting screw for min. gas inlet flow volume
102 Inspection window
120 Fixing points
221.1 Flue duct
221.2 Combustion air intake
226 Fan
228 Differential pressure switch
295 Appliance type sticker
361.1 Drain tap
413 DHW flow meter (turbine)
418 Data plate
6 720 613 076-02.1O
221.2
18
18.1
27
32
29
228
120
8.1
361.1
418
7
226
64
63
33
221.1
102
43
38
4
20
3
56
6.3
36
6
15
413
295
6 720 660 238 (2008/07)
4
4| Appliance Layout and Hydralic Diagrams
2.1.2 ZWE 24-5 MFK
Fig. 2
3Testing point (injector pressure)
4Heatronic 3
6Temperature limiter for heat exchanger
6.1 Flue gas monitoring system (draught diverter)
6.2 Flue gas monitoring system (combustion chamber)
6.3 Temperature sensor for hot water
7Testing point for gas supply pressure
8.1 Pressure gauge
15 Safety valve (CH system)
18 Central heating pump
18.1 Pump speed selector switch
20 Expansion vessel
27 Automatic air vent
29 Burner with injector manifold
32 Flame sensing electrode
33 Igniter electrodes
36 Temperature sensor in CH flow
38 System filling loop
39 Draught diverter
43 CH flow
56 Gas valve
63 Adjusting nut for max. gas inlet flow volume
64 Adjusting screw for min. gas inlet flow volume
102 Inspection window
120 Fixing points
295 Appliance type sticker
361.1 Drain tap
413 DHW flow meter (turbine)
418 Data plate
6 720 613 077-02.1O
15
6.1
120
6
102
38
7
64
63
33
56
3
11
39
27
18
18.1
361.1
418
8.1
4
29
6.2
295
20
32
36
6.3
43
413
6 720 660 238 (2008/07) 5
5|Appliance Layout and Hydralic Diagrams
2.1.3 ZXC 21/24/28/30/35-3 MFA/MFAP/MFAE/MFAM
Fig. 3
3Testing point (injector pressure)
4Heatronic 3
6Temperature limiter for heat exchanger
6.3 Temperature sensor for hot water
7Testing point for gas supply pressure
8.1 Pressure gauge
15 Safety valve (CH system)
18 Central heating pump
18.1 Pump speed selector switch
20 Expansion vessel
27 Automatic air vent
29 Burner with injector manifold
32 Flame sensing electrode
33 Igniter electrodes
36 Temperature sensor in CH flow
38 System filling loop
43 CH flow
56 Gas valve
63 Adjusting nut for max. gas inlet flow volume
64 Adjusting screw for min. gas inlet flow volume
84 Motor
88 3-way valve
102 Inspection window
120 Fixing points
221.1 Flue duct
221.2 Combustion air intake
226 Fan
228 Differential pressure switch
295 Appliance type sticker
355 Plate-type domestic hot water heat exchanger
361.1 Drain tap
413 DHW flow meter (turbine)
418 Data plate
6 720 613 084-03.1O
20
221.2
413
18
18.1
27
32
228
120
8.1
361.1
418
88
7
6
226
6.3
64
355
63
33
221.1
36
102
43
38
4
29
20
3
56
84
295
15
6 720 660 238 (2008/07)
6
4| Appliance Layout and Hydralic Diagrams
2.1.4 ZSC 21/24/28/30/35-3 MFA/MFAE/MFAP/MFAM
Fig. 4
3Testing point (injector pressure)
4Heatronic 3
6Temperature limiter for heat exchanger
7Testing point for gas supply pressure
8.1 Pressure gauge
15 Safety valve (CH system)
18 Central heating pump
18.1 Pump speed selector switch
20 Expansion vessel
27 Automatic air vent
29 Burner with injector manifold
32 Flame sensing electrode
33 Igniter electrodes
36 Temperature sensor in CH flow
39 Draught diverter
43 CH flow
56 Gas valve
63 Adjusting nut for max. gas inlet flow volume
64 Adjusting screw for min. gas inlet flow volume
71 Storage flow pipe
72 Storage return pipe
84 Motor
88 3-way valve
102 Inspection window
120 Fixing points
221.1 Flue duct
221.2 Combustion air intake
226 Fan
228 Differential pressure switch
295 Appliance type sticker
361.1 Drain tap
418 Data plate
6 720 613 084 - 04.1O
20
102
88
84
7
64
63
33
56
3
36
11
43
27
18
18.1
361.1
418
8.1
4
221.2
6
226
228
221.1
120
71
72
32
29
295
15
7|Appliance Layout and Hydralic Diagrams
6 720 660 238 (2008/07) 7
2.1.5. ZWC 18/24/28 MFK/MFKP
Fig. 5
3Testing point (injector pressure)
4Heatronic 3
6Temperature limiter for heat exchanger
6.1 Flue gas monitoring system (draught diverter)
6.2 Flue gas monitoring syst em (combustion chamber)
6.3 Temperature sensor for hot water
7Testing point for gas supply pressure
8.1 Pressure gauge
15 Safety valve (CH system)
18 Central heating pump
18.1 Pump speed selector switch
20 Expansion vessel
27 Automatic air vent
29 Burner with injector manifold
32 Flame sensing electrode
33 Igniter electrodes
36 Temperature sensor in CH flow
38 System filling loop
39 Draught diverter
43 CH flow
56 Gas valve
63 Adjusting nut for max. gas inlet flow volume
64 Adjusting screw for min. gas inlet flow volume
84 Motor 3-way diverter valve
88 3-way valve
102 Inspection window
120 Fixing points
295 Appliance type sticker
355 Plate-type domestic hot water heat exchanger
361.1 Drain tap
413 DHW flow meter (turbine)
418 Data plate
6 720 613 085 - 03.1O
6.1
120
20
6
102
84
88
38
6.3
355
7
64
63
33
56
3
36
11
43
39
27
18
18.1
413
361.1
418
15
8.1
4
32
29
6.2
295
8| Appliance Layout and Hydralic Diagrams
6 720 660 238 (2008/07)
8
2.1.6 ZSC 18/27/28 MFK
Fig. 6
3Testing point (injector pressure)
4Heatronic 3
6Temperature limiter for heat exchanger
6.1 Flue gas monitoring system (draught diverter)
6.2 Flue gas monitoring system (combustion chamber NTC)
7Testing point for gas supply pressure
8.1 Pressure gauge
15 Safety valve (CH system)
18 Central heating pump
18.1 Pump speed selector switch
20 Expansion vessel
27 Automatic air vent
29 Burner with injector manifold
32 Flame sensing electrode
33 Igniter electrodes
36 Temperature sensor in CH flow
39 Draught diverter
43 CH flow
56 Gas valve
63 Adjusting nut for max. gas inlet flow volume
64 Adjusting screw for min. gas inlet flow volume
71 Storage flow pipe
72 Storage return pipe
84 Motor 3-way diverter valve
88 3-way valve
102 Inspection window
120 Fixing points
295 Appliance type sticker
361.1 Drain tap
418 Data plate
6 720 613 085 - 04.1O
6.1
120
20
6
102
84
88
7
64
63
33
56
3
36
11
43
39
27
18
18.1
361.1
418
8.1
4
32
29
6.2
295
15
9|Appliance Layout and Hydralic Diagrams
6 720 660 238 (2008/07) 9
2.2.1 ZWE 24/28-5 MFA/MFAE
2.2 Hydraulic Diagrams
Fig. 7
6 720 660 238 (2008/07)
10
10| Appliance Layout and Hydralic Diagrams
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