Grant 50/70 - Typical Control System Wiring Diagram - Utility Models; Typical Control System Wiring Diagram - Utility Models (3-Port Valve)

43
Grant Vortex Indoor/Utility, System and Boiler House Oil Boilers
Utility models with CH and HW controlled by two 2-port zone valves
Typical control system wiring diagram - Utility models
10.3
Utility models with CH and HW controlled by 3-port mid position valve
Typical control system wiring diagram - Utility models
10.4
10 - WIRING DIAGRAMS
LN E
240 V
50 HZ
Frost
Thermostat
Pipe
Thermostat
(if fitted)
Wiring Centre
1
2
3
45 6 7 8 9 10
134NL
Cylinder
Stat
1
C
Room Stat
21
3
Pump
E
N
L
2-port
Zone Valve
Motor
HTG
2-port
Zone Valve
Motor
DHW
Grey
Blue Blue
Brown
Brown
Green/Yellow
Green/Yellow
Orange
Orange
Grey
123456
LNE
78910
ENL
Boiler
Terminal Block
Remove link 1 to 4 when
plug-in programmer is fitted
Programmer/Timer
123456
LNE
78910
ENL
L
N
E
Supply to
burner
Cylinder
Stat
1
C2
LN E
240 V
50 Hz
Room
Stat
213
3-Port
Mid Position
Zone Valve
Pump
E
N
L
Blue
Green/Yellow
White
Grey
Orange
Frost
Thermostat
Pipe
Thermostat
(if fitted)
Wiring Centre
12345678910
134NL
Boiler Terminal Block
Remove link 1 to 4 when
plug-in programmer is fitted
Programmer/Timer