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Bryant ASPAS1BBA015 Manuale Utente Pagina 86

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Vedere la pagina 85
Page 86
SECTION 4.2
OPERATIONAL ANALYSIS
PART 4
DC CONTROL
UTILITY VOLTAGE RESTORED / RE-
TRANSFER TO UTILITY
The "Load" is powered by the "Standby" power
supply. The circuit board continues to seek an
acceptable "Utility" source voltage. On restoration of
"Utility" source voltage, the following events will
occur:
• On restoration of utility source voltage above 80
percent of the nominal rated voltage, a "retransfer
time delay" on the circuit board starts timing. The
timer will run for about fifteen (15) seconds.
• At the end of fifteen (15) seconds, the "retransfer
time delay" will stop timing and circuit board action
will open the Wire 23 circuit to ground. The transfer
relay (TR) will then de-energize.
• When the transfer relay (TR) de-energizes, its
normally-closed contacts close. "Utility" source
voltage is then delivered to the utility closing coil
(C1), via Wires N1A/N2A, the closed TR contacts,
Wire 126, limit switch XA1, and a bridge rectifier.
• The utility closing coil (C1) energizes and moves
the main current carrying contacts to their "Neutral"
position. The main contacts move to an over center
C
HAR
G
E
R
BATTERY
0
1
62
22
V
O
LTA
GE
RE
GU
LAT
OR
ELE
C
TR
O
NI
C
6
4
0
11
(
STATOR
)
DPE WINDIN
G
C
2-
8
2
C
2-
7
C
2-1
1
C
2-1
0
C
B
2
4
0
22
6
BA
FIELD
0
1
3
11
0
77
C
2-
1
3
1
2
C
1-
3
4
11
1
6
17
12
1
3
1
5
14
C
2-
3
PRINTED
C
IR
CU
I
T
0
C
1-
6
C
2-
9
0
0
55
C
2-
4
4
0
WINDIN
G
EN
G
INE R
UN
(
STATOR
)
66
CO
NTR
OL
B
O
AR
D
3
2
1
J2
3
7
9
4
6
5
J1
5
4
1
2
66A
66A
85
351
HT
O
C
1-
4
C
2-
2
0
0
S
W
2
17
22
5
1
5
224
0
66A
14
1
94
2
3
1
94
56
1
5A
66A
2
39
1
8
86
2
3
224
4
86
0
L
OP
14
22
5
2
39
1
5A
2
3
1
94
1
3
22
5B
BATTERY
C
HAR
GE
WINDIN
G
1
3
1
2
77
224B
11
22
1
66
3
4
22
5A
224A
7
7
9
9
B
CR
0
14
1
3
1
3
1
3
0
0
224
22
5A
22
5
224A
22
11
0
0
1
5A
TX - TRANSFORMER, 16 Vac 56 VA & 16 Vac 1 VA
(
DUAL SEC.
)
DIA
G
RAM KE
Y
BA - BR
US
H A
SS
EMBL
Y
SC
R -
S
TARTER
CO
NTA
C
T
O
R RELA
Y
SC
-
S
TARTER
CO
NTA
C
T
OR
HT
O
- HI
G
H
O
IL TEMPERAT
U
RE
S
WIT
CH
F
S
- F
U
EL
SO
LEN
O
I
D
CB1 - CIRCUIT BREAKER
,
MAIN OUTPU
T
L
O
P - L
O
W
O
IL PRE
SSU
RE
S
WIT
CH
IM2 - IGNITION MODULE
,
CYLINDER #
2
IM1 - IGNITION MODULE
,
CYLINDER #
1
S
W1 - A
U
T
O
/
O
FF
/
MAN
U
AL
S
WIT
CH
S
M -
S
TARTER M
O
T
OR
S
W2 -
S
ET EXER
C
I
S
E
S
WIT
CH
SP1
,
SP2 - SPARK PLUG
S
CB2 - CIRCUIT BREAKER
,
ALT. EXCITATIO
N
B
C
R - BATTERY
C
HAR
G
E RELA
Y
F2 - F
US
E 7.
5
AM
P
D - DI
O
D
E
F1 - F
US
E 1
5
AM
P
CB3 - CIRCUIT BREAKER
,
EXTERNAL OUTLET
,
PUSH/PUL
L
= 12 VD
C
ALWAY
S
PRE
S
EN
T
= A
C
V
O
LTA
GE
=
G
R
OU
ND F
O
R
CO
NTR
O
L P
U
RP
OS
E
S
= 12 VD
C
D
U
RIN
G
C
RANKIN
G
O
NL
Y
= D
C
FIELD
CO
NTR
O
L V
O
LTA
GE
= 12 VD
C
D
U
RIN
G
EN
G
INE R
U
N
CO
NDITI
ON
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