Grant Vortex VTXBH15/26 - Page 25

Overheat
Stat
Control
Stat
C
2
C
2 1
Link*
Link*
Connector*
Earth stud on
top of boiler
Power supply
from controls
Power supply
to burner
L E N N E L
Green/Yellow
BrownBrown
Blue Blue
Figure 8-3: Dual thermostat wiring diagram
Page 25
! NOTE !
* Links and connector (to link Neutral wires) to be supplied
and tted by installer.
! WARNING !
DO NOT connect N (Neutral) to any terminals on either
thermostat.
Cylinder
Stat
N
2-Channel
Programmer
230V
50HZ
L N E
5A
1 2 3 4 5 6 7 8 9 10
L
Frost
Thermostat
Pipe Stat
(If fitted)
Wiring
Centre
Grey
Orange
Green/Yellow
Brown
Blue
Blue
Green/Yellow
Brown
OFFOFF ON ON
HW HT HW HT
3-Port Mid Position
Zone Valve
Motor
Blue
Green/Yellow
1
C
2
White
Link
13k
2W
270k
0.25W
Pump
E
N
L
Room
Stat
2 1 3
Overheat
Stat
1
C
2
Control
Stat
1
C
2
Link
Link
Burner
L N E
Refer to Figure 8-3 for connection details
Earth Stud on
top of Boiler
Green/Yellow
Blue
Brown
Blue
Green/Yellow
Figure 8-2: 3-port valve control system
Section 8: Electrical