2
TABLE OF CONTENTS
1.
GENERAL INFORMATION
1.1.
G
ENERAL
I
NFORMATION
1.2.
T
ECHNICAL
I
NFORMATION
1.3.
O
VERALL
V
IEW
2.
INSTALLATION
2.1.
R
EFERENCE
S
TANDARDS
2.2.
S
ITING THE
A
PPLIANCE
2.3.
O
VERALL
D
IMENSIONS
2.4.
M
INIMUM
C
LEARANCES
2.5.
M
OUNTING THE
A
PPLIANCE
2.6.
E
LECTRICAL
C
ONNECTION
2.7.
G
AS
C
ONNECTION
2.8.
W
ATER
C
ONNECTIONS
2.9.
F
LUE
C
ONNECTIONS
2.10.
A
CCESSORY
C
ONNECTION
2.11.
E
LECTRICAL DIAGRAM
2.12.
W
ATER
C
IRCUIT DIAGRAM
3.
COMMISSIONING
3.1.
I
NITIAL
P
REPARATION
3.2.
R
EMOVING THE
C
ASING
3.3.
C
ONTROL
P
ANEL
3.4.
I
NITIAL
S
TART
-
UP
3.5.
D
ISPLAY
: M
ESSAGES
S
HOWN
D
URING
N
ORMAL
O
PERATION
3.6.
O
PERATING
P
ARAMETERS
3.6.1.
R
EGULATION
M
ENU
T
ABLE
3.6.2.
S
ETTINGS
D
ISPLAY
3.6.3.
G
AS
R
EGULATION
C
HECK
3.6.4.
I
GNITION
D
ELAY
A
DJUSTMENT
3.6.5.
A
DJUSTING THE
M
AXIMUM
H
EATING
P
OWER
3.6.6.
S
OFT
L
IGHT
A
DJUSTMENT
3.7.
C
HANGING THE
T
YPE OF
G
AS
3.8.
B
OILER
S
AFETY
S
YSTEMS
3.9.
C
OMBUSTION
A
NALYSIS
3.10.
C
OMPLETION
3.11.
D
RAINING
4.
ZONE VALVES
5.
MAINTENANCE
5.1.
G
ENERAL
R
EMARKS
5.2.
C
LEANING THE
P
RIMARY
E
XCHANGER
5.3.
C
LEANING THE
C
ONDENSATE
T
RAP
5.4.
O
PERATIONAL
T
EST
6.
SERVICING INSTRUCTIONS
6.1.
R
EPLACEMENT OF
P
ARTS
6.2.
T
O
G
AIN
G
ENERAL
A
CCESS
6.3.
A
CCESS TO THE
C
OMBUSTION
C
HAMBER
6.3.1.
R
EMOVING THE
F
AN
6.3.2.
R
EMOVING THE
A
IR
P
RESSURE
S
WITCH
6.3.3.
R
EMOVING THE
B
URNER
6.3.4.
R
EMOVING THE
E
LECTRODES
6.3.5.
R
EMOVING THE
H
EAT
E
XCHANGER
6.3.6.
R
EMOVING THE
C
ONDENSATE
T
RAP
(
TUBE
)
6.3.7.
R
EMOVING THE
C
ONDENSATE
T
RAP
6.4.
A
CCESS TO THE
G
AS
V
ALVE
6.4.1.
R
EMOVING THE
G
AS
V
ALVE
6.4.2.
R
EMOVING THE
S
PARK
G
ENERATOR
6.5.
A
CCESS TO THE
W
ATER
C
IRCUIT
6.5.1.
R
EMOVING THE
D.H.W.
(S
ECONDARY
) E
XCHANGER
6.5.2.
R
EMOVING THE
S
AFETY
V
ALVE
6.5.3.
R
EMOVING THE
A
UTOMATIC
A
IR
V
ENT
6.5.4.
R
EMOVING THE
D
IVERTER
V
ALVE
A
CTUATOR
6.5.5.
R
EMOVING THE
DHW F
LOW
S
WITCH
(MFFI
ONLY
)
6.5.6.
R
EMOVING THE
P
UMP
6.5.7.
R
EMOVING THE
P
RESSURE
G
AUGE
6.5.8.
R
EMOVING THE
E
XPANSION
V
ESSEL
6.5.9.
R
EMOVING THE
D.H.W. T
EMPERATURE
P
ROBE
(N.T.C. - MFFI
ONLY
)
6.5.10.
R
EMOVING THE
C.H. F
LOW
T
EMPERATURE
P
ROBE
(N.T.C.)
6.5.11.
R
EMOVING THE
C.H. R
ETURN
T
EMPERATURE
P
ROBE
(N.T.C.)
6.6.
A
CCESS TO THE
C
ONTROL
S
YSTEM
6.6.1.
C
HECKING THE
F
USES
6.6.2.
R
EMOVING THE
P
RINTED
C
IRCUIT
B
OARDS
6.6.3.
R
EMOVING THE
T
IME
C
LOCK
7.
FAULT FINDING
7.1
F
AULT
F
INDING
G
UIDE
(F
LOW
-C
HARTS
)
8.
SHORT SPARES PARTS LIST
8.1.
ACO 27 MFFI
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