Honeywell A4021 Series - General Wiring Diagrams

13
EN2R--9023 9705R0--NE
GENERAL WIRING DIAGRAMS
LGPS GPS
Valve Proving System
A4021A
6(N)
V2
8
10
ALARM
vent--valve
11
13
15
Ignition controller
4(N)
N L
1
2
T
(ext.)
1214
heat--demand
input
7
9
main--valve
output
V1
16 5(N)
reset
fuse
3
L
N
16A
Fig. 10. Wiring diagram for 2--valve configuration
pre--configuration
LGPS GPS
Valve Proving System
A4021A
6(N)
V2
8
10
ALARM
vent--valve
11
13
Ignition controller
4(N)
N L
1
2
(ext.)
1214
heat--demand
input
9
15 7
main--valve
output
V1
16 5(N)
reset
fuse
3
L
N
16A
T
Fig. 11. Wiring diagram 2--valve configuration for
post--configuration
LGPS GPS
Valve Proving System
A4021A
6(N)
V2
8
10
ALARM
vent--valve
11
13
Ignition controller
4(N)
N L
1
2
T
(ext.)
1214
heat--demand
input
9
15
main
output
V1
16 5(N)
reset
fuse
3
L
N
16A
Vp
7
pilot
output
valve
valve
Fig. 12. wiring diagram 3--valve configuration
(pre--configuration)
LGPS GPS
Valve Proving System
A4021A
6(N)
V2
8
10
ALARM
vent--valve
11
13
Ignition controller
4(N)
N L
1
2
(ext.)
heat--demand
input
9
V1
16 5(N)
reset
fuse
3
L
N
16A
Vp
1214
T
15
main
7
pilot
output
valve
valve
output
Fig. 13. Wiring diagram 3--valve configuration
(post--configuration)
WARNING
These are general wiring diagram and have not been
approved yet by an official approval body. Depending
on the application and used ignition controller special
wiring diagrams maybe required.