2
TABLE OF CONTENTS
1. GENERAL INFORMATION PA
GE
.3
1.1 G
ENERAL INSTRUCTIONS PAGE.3
1.2 OVERALL VIEW PAGE.4
2. INSTALLATION PAGE.4
2.1
R
EFERENCE STANDARDS PAGE.
5
2.2 SITING THE APPLIANCE PAGE.5
2.3 OVERALL DIMENSIONS PA
GE
.6
2.4 CLEARANCES PAGE.6
2.5 MOUNTING THE APPLIANCE PAGE.6
2.6 E
LECTRICAL CONNECTION PAGE.7
2.7 GAS CONNECTION PAGE.8
2.8
WA
TER
CONNECTION PA
GE
.
8
2.9 FLUE CONNECTION PAGE.10
2.10 C
ONTROL PANEL PAGE.18
2.11 D
IGITAL DISPLAY AND FAULT CODES PAGE.18
2.12 R
EMOVING THE FRONT PANEL PAGE.19
2.13 ROOM THERMOST
AT
CONNECTION PAGE.19
2.14 ELECTRICAL/SYSTEM DIAGRAMS PAGE.20
2.15 WATER CIRCUIT DIAGRAM PAGE.21
3. COMMISSIONING PAGE.22
3.1 I
NITIAL PREPARATION PAGE. 22
3.2 INITIAL START-UP PAGE.23
3.3 OPERATIONAL ADJUSTMENTS PAGE. 23
3.4 C
OMBUSTION ANALYSIS PAGE.24
3.5 PRODUCT OF COMBUSTION
DISCHARGE MONITORING PAGE. 24
3.6 BOILER SAFETY SYSTEMS PAGE.24
3.7 DRAINING THE SYSTEM PAGE.26
3.8 COMPLETION PAGE.26
3.9
O
PERA
TIONAL
CHECKS PA
GE
.
26
3.10 INSTRUCTING THE END USER PAGE.26
4. GAS ADJUSTMENTS PAGE.27
4.1 CHANGING THE TYPE OF GAS PAGE.27
4.2
A
DJUSTING
THE
GAS PRESSURES PA
GE
.
28
5. MAINTENANCE PAGE.32
6. SERVICING INSTRUCTIONS PA
GE
.
33
6.1 R
EPLACEMENT OF PARTS PA
GE
.
33
6.2 T
O GAIN GENERAL ACCESS PAGE.33
6.2.1 REMOVING THE FRONT
PANEL PAGE.33
6.2.2 R
EMOVING THE SEALED
CHAMBER FRONT PANEL PA
GE
.
34
6.2.3 R
EMOVING THE SIDE
PANELS PAGE.34
6.3 ACCESS TO THE COMBUSTION
CHAMBER PA
GE
.
35
6.3.1 REMO
VING THE
COMBUSTION CHAMBER PAGE.35
6.3.2
R
EMOVING THE BURNER
AND
JETS PAGE.
35
6.3.3 REMOVING THE
ELECTR
ODES
PA
GE
.35
6.3.4 REMOVING THE MAIN HEAT
EXCHANGER PAGE.36
6.3.5 REMOVING THE AIR
PRESSURE SWITCH PAGE.37
6.3.6 REMO
VING THE
FAN PA
GE
.38
6.4
A
CCESS TO THE GAS VALVE PAGE.
38
6.4.1 REMOVING THE SPARK
GENERATOR PAGE.38
6.4.2 R
EMOVING THE GAS VALVE PAGE.39
6.5 ACCESS
TO THE
WA
TER
CIRCUIT PA
GE
.39
6.5.1 REMOVING THE D.H.W. (SECONDARY)
EXCHANGER PAGE.39
6.5.2 REMOVING THE PUMP
PRESSURE SWITCH PAGE.40
6.5.3 REMO
VING THE
SAFETY
VALVE PAGE.41
6.5.4 R
EMOVING THE AUTOMATIC
AIR VENT PAGE.41
6.5.5 REMOVING THE PUMP PAGE. 42
6.5.6 REMOVING THE PRESSURE
GAUGE PAGE. 43
6.5.7 REMOVING THE EXPANSION
VESSEL PAGE.43
6.5.8 REMOVING THE OVERHEAT
THERMOSTAT PAGE.44
6.5.9 REMOVING THE C.H.
TEMPERATURE PROBE (N.T.C.) PAGE. 44
6.5.10 REMOVING THE D.H.W.
TEMPERATURE SENSOR
(N.T.C.) PAGE.45
6.5.11
R
EMO
VING THE DIVERTOR
VALVE ACTUATOR PAGE.45
6.5.12 REMOVING THE D.H.W.
F
LO
W
SWITCH PA
GE
.
45
6.6
A
CCESS
T
O
THE
CONTR
OL
SYSTEM PA
GE
.
46
6.6.1 CHECKING THE FUSES PAGE.46
6.6.2
R
EMO
VING THE
P
.C.B. P
A
GE
.
47
6.6.3
R
EMO
VING
THE
TIME CLOCK PA
GE
.
48
7. FAULT FINDING PAGE.49
7.1
F
A
UL
T
FINDING GUIDE
(FLOW-CHARTS)PAGE.49
8. EXPLODED VIEW PA
GE
.
52
8.1 SHORT SPARES LIST PAGE.53
9. TECHNICAL INFORMATION PAGE.54
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