Publication No. 5105703
24
GV2
T2
T3
T4
T5
T6
T7
T8
T1
GV1
Gas
Control
Valve
Gravity Hot Water
or Pump Over Run
Thermostat
Gravity/Fully
Pumped System
Selection Switch
(Shown in Fully
Pumped Position)
Boiler Thermostat
Red
Red
4 NO
2
NC
3
C
Brown
Brown
Brown
Brown
Blue
Bro
wn
White
Blue
Black
Pump
L
Pump
N
N
Central Heating Switched
Live on Combined Gravity
D.H.W. Pumped C.H. Systems
Domestic Hot Water Switched
Live on Combined Gravity
D.H.W. Pumped C.H. Systems
PRF0029A
L
SwL
Permanent Live on
Fully Pumped Systems
Switched Live on
Fully Pumped Systems
Test Socket
Air
Pressure
Switch
Fan
S1
S2
Electronic
Control
Overheat
Thermostat
White
White
White
Brown
Red
Red
Blue
Blue
Blue
Blue
Black
Orange
N
(NO)
(NC)
(C)
2
3
1
R
R
B
BR
R
BR
B
B
BK
G/Y
G/Y
G/Y
G/Y
W
BR
OR
R
R
BR
BR
BR
Colour Key
BR =
Brown
BK =
Black
B =
Blue
W =
White
OR =
Orange
G/Y =
Green/ Yellow
R
Installer Terminal (6 way)
This Appliance must be Earthed
Mains
Pump
L
N
SwL
L
N
L
N
SwL
L
N
Honeywell Gas Valve
W
BR
BR
B
R
W
B
BK
BR
BR
W
BK
B
G/Y
B
G/Y
BR
B
B
BK
W
BK
PRF0033A
W
W
Fig. 27
Fig. 28
Commissioning