General Wiring Diagrams - Honeywell A4021 Series Product Handbook

GENERAL WIRING DIAGRAMS

Ignition controller
heat--demand
N L
reset
N
L
4(N) 3 2
fuse
16A
9 16
T
V1
LGPS
Fig. 10. Wiring diagram for 2--valve configuration
pre--configuration
Ignition controller
N L
reset
N
L
4(N) 3 2
fuse
16A
9 16
V1
LGPS
Fig. 11. Wiring diagram 2--valve configuration for
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.
main--valve
output
input
(ext.)
14 12 15 7 10
Valve Proving System
A4021A
6(N)
1 5(N) 8 13
V2
GPS
heat--demand main--valve
input output
T
(ext.)
14 12 15 7 10
Valve Proving System
A4021A
6(N)
1 5(N) 8 13
V2
GPS
N
ALARM
L
4(N)
11
fuse
16A
T
vent--valve
Fig. 12. wiring diagram 3--valve configuration
(pre--configuration)
N
ALARM
L
4(N)
11
fuse
16A
vent--valve
Fig. 13. Wiring diagram 3--valve configuration
(post--configuration)
13
Ignition controller
pilot
valve
heat--demand
output
N L input
reset
(ext.)
3 2 14 12
Valve Proving System
9 16 1 5(N)
V1
LGPS GPS
Ignition controller
heat--demand
N L input
reset
T
(ext.)
3 2 14 12
Valve Proving System
9 16 1 5(N)
V1
LGPS GPS
main
valve
output
ALARM
15 7 10
11
A4021A
6(N)
8 13
vent--valve
V2
Vp
pilot
main
valve
valve
output output
ALARM
10
15 7
11
A4021A
6(N)
8 13
vent--valve
V2
Vp
EN2R--9023 9705R0--NE