Technical information
2
TABLE OF CONTENTS
1. GENERAL INFORMATION
1.1. GENERAL INFORMATION 3
1.2. T
ECHNICAL INFORMATION 4
1.3. O
VERALL VIEW 6
2. INSTALLATION
2.1. REFERENCE STANDARDS 7
2.2. S
I
TING THE
AP
PLIANCE
7
2.3. O
V
ERALL
DI
MENSIONS
8
2.4. M
I
NIMUM
CL
EARANCES
8
2.5. M
O
UNTING THE
AP
PLIANCE
9
2.6. E
L
ECTRICAL
CO
NNECTION
9
2.7. G
A
S
CO
NNECTION
9
2.8. W
A
TER
CO
NNECTIONS
10
2
.9. F
L
UE
CO
NNECTIONS
1
3
2.9.1 F
ITTING THE COAXIAL FLUE
(
Ø 60 / 100 H
O
RIZONTAL
)
14
2.9.2 F
ITTING THE 5” FLUE
(Ø 80 / 125 Horizontal/Vertical) 15
2.9.3
F
ITTING
THE COAXIAL FLUE
(Ø 60 / 100 VERTICAL) 16
2.9.4 FITTING THE TWIN PIPE (Ø80 / 80) 17
2.10. F
ITTING THE MECHANICAL/DIGITAL
TIME CLOCK 20
2.11. S
E
TTING THE
ME
CHANICAL
TI
ME
CL
OCK
22
2.11.1. S
E
TTING THE
DI
GITAL
TI
ME
CL
OCK
22
2.12. A
CCESSORY CONNECTION 24
2.13. E
LECTRICAL DIAGRAM 26
2.14. W
A
TER
CI
RCUIT DIAGRAM
28
3. COMMISSIONING
3.1. INITIAL PREPARATION 30
3.2. R
EMO
VING THE
CASING 32
3.3. C
ONTROL PANEL 33
3.4. I
NITIAL STAR
T
-UP 35
3.5. D
ISPLA
Y
: MESSA
GES
SHO
WN
DURING
NORMAL OPERATION 36
3.6. O
PERATING PARAMETERS 37
3.6.1. R
EGULATION MENU TABLE 37
3.6.2. S
ETTINGS DISPLAY 43
3.6.3. G
AS REGULATION CHECK 44
3.6.4. I
GNITION DELAY ADJUSTMENT 45
3.6.5. A
DJUSTING THE MAXIMUM HEATING
PO
WER
45
3.6.6. S
OFT LIGHT ADJUSTMENT 45
3.7. C
HANGING THE TYPE OF GAS 45
3.8.
A
DJUSTING
THE
DOMESTIC HO
T
WA
TER
FLO
W
RA
TE
45
3.9. B
ALANCING THE CENTRAL
HEATING SYSTEM 45
3.10. B
OILER SAFETY SYSTEMS 46
3.11. C
OMPLETION 47
3.12.
D
RAINING 47
4. ZONE VALVES 48
5. SEQUENCE OF OPERATION 51
5.1 CENTRAL HEATING MODE 51
5.2 D
OMESTIC HOT WATER MODE 51
6. MAINTENANCE 52
6.1. GE
NERAL
RE
MARKS
52
6.2. C
L
EANING THE
PR
IMARY
EX
CHANGER
52
6.3. C
L
EANING THE
CO
NDENSATE
TR
AP
52
6.4. O
P
ERATIONAL
TE
ST
52
7. SERVICING INSTRUCTIONS 53
7.1. REPLACEMENT OF PARTS 53
7
.2. T
O GAIN GENERAL ACCESS 5
3
7
.3. A
CCESS TO THE COMBUSTION
CHAMBER 5
4
7.3.1. R
E
MOVING THE
FA
N
54
7.3.2. R
E
MOVING THE
AI
R
PR
ESSURE
SW
ITCH
55
7.3.3. R
E
MOVING THE
BU
RNER
55
7.3.4. R
E
MOVING THE
EL
ECTRODES
56
7.3.5. R
E
MOVING THE
HE
AT
EX
CHANGER
56
7.3.6. R
E
MOVING THE
CO
NDENSATE
TR
AP
(T
UBE
)58
7.3.7. R
E
MOVING THE
CO
NDENSATE
TR
AP
58
7.4. A
C
CESS TO THE
GA
S
VA
LVE
59
7.4.1. R
EMOVING THE GAS VALVE 59
7.4.2. R
EMOVING THE SPARK GENERATOR 60
7.5. A
CCESS TO THE WATER CIRCUIT 60
7.5.1. R
EMOVING THE D.H.W.
(S
ECONDARY) EXCHANGER 60
7.5.2. R
E
MO
VING THE SA
FETY
VA
L
VE 61
7.5.3. R
EMOVING THE AUTOMATIC AIR VENT 61
7.5.4. R
EMOVING THE DIVERTER VALVE
ACTUATOR 62
7.5.5. R
E
MOVING THE
DHW FL
OW
SW
ITCH
(MFFI ONLY) 62
7.5.6. R
EMOVING THE PUMP 62
7.5.7.
R
EMO
VING
THE
PRESSURE GAUGE 63
7.5.8.
R
EMO
VING THE
EXP
ANSION
VESSEL 64
7.5.9. R
EMOVING THE D.H.W. TEMPERATURE
PROBE (N.T.C. - MFFI ONLY)64
7.5.10. R
EMOVING THE C.H. FLOW
TEMPERATURE PROBE (N.T.C.) 65
7.5.11. R
EMOVING THE C.H. RETURN
TEMPERATURE PROBE (N.T.C.) 65
7.6. A
CCESS TO THE CONTROL SYSTEM 66
7.6.1.
C
HECKING
THE
FUSES 66
7.6.2. R
EMOVING THE PRINTED CIRCUIT
BOARDS 66
7.6.3.
R
EMO
VING
THE
TIME CLOCK 67
8. FAULT FINDING 68
8.1 FAULT FINDING GUIDE
(FLO
W
-CHAR
TS
)
68
9.
SHOR
T SP
ARES PARTS LIST 72
10. ANNUAL MAINTENANCE CHECKLIST 76
11. BENCHMARK COMMISSIONING
CHECKLIST 78
12.
SER
VICE INTER
VAL RECORD 79
PA
GE
PA
GE