Page 22
1b
1a
1
Bl
Bl
Bl
Bl
Bl
R
R
R
G/Y
G/Y
Br
Br
Br
Br
Br
Br
Y
Br
Br
Br
Br
Br
Y
B
Y
B
O
O
B
B
G
Wh
Wh
Wh
Wh
Or
Wh
Br
Br
Br
Bl
Br
R
R
Or
Wh
Br
Bl
B
Or
Wh
Or
Wh
B
BL
Br
Bl
Bl
Br
Br
B
B
Br
G/Y
G/Y
Wh
O
O
B
B
Y
Y
S4
S5
S6
ID_RESIST
OR
S3
S1 & S2
FRONT PANEL
Neon Illuminated
ON / OFF Switch
Red LED
Push Button
J33
J32
J34
J28
J5
J3
J31
J9
L
L
N
N
E
E
M
M
M
1
2
3
5
4
GRASSLIN CLOCK
Hot Water
Central Heating
* All wire sizes 0.5mm2 unless otherwise stated
N
L
2
3
4
1
ON
SPD1/2A
OPTIONAL EX
TR
A IF FIT
TED
(PART No XB142)
SCALE INHIBITOR
S 3
S 4
S 5
S 6
Store overheat sensors
Cold Water IN
Domestic Hot Water OUT
Bottom Immersion Heater
2K2 Resistor (Black) A_01
Top Immersion Heater
S1 & S2
ID_RESISTOR
SENSOR LEGEND
BLUE
Bl
BROWN
Br
GREEN
GREY
GREEN / YELLOW
G
Gr
G/Y
WIRE COLOUR LEGEND
BLACK
ORANGE
YELLOW
WHITE
RED
B
Or
Y
Y
Y
Y
Wh
R
Flat Ribbon Cable
2 DOUBLE POLE
CHANGE OVER SWITCHES
WITH CENTRE OFF
FACTORY FITTED CLOCK
(STANDARD) OPTION
(1) Connection only used
if Modulating Pump is fitted
(1)
(1)
(Boiler ON / OFF)
(Heating S-L)
(Hot Water S-L)
(Frost Protection S-L)
(Room Stat S-L)
DHW
Pump
Boiler
Heating
Pump
Pump
Bl
Br
B
G/Y
L
N
E
M
6B
2A
5B
2A
5B
3A
4B
3A
1A
6B
4B
1A
I
1a
1
1b
Rocker Switch
Terminal
Connections
O
White Covering
G/Y
Or
Wh
BL
J33
J32
J34
J28
J29
J5
J3
J30
J31
J9
(1)
(1)
Br
Br
B
B
R
Or
R
Or
Remove Link
To Fit
Room Thermostat
Br
B
Or
Wh
Br
Br
Br
Bl Bl
Bl
G/Y G/Y
G/Y
Br
SL
-F
SL
-B
SL
-R
SL
-H
SL-
W
E
E
E
L1
L2
L3
N
N
N
MCB 1
6A
HT
G S
wit
ched Liv
e
Room sta
t S/W Liv
e (L)
HW S
wit
ched Liv
e
Fr
ost P
rot
ec
tion S/W Liv
e (L)
Boiler S/W Liv
e (L)
Liv
e
(L) 230
V ac
Neutr
al
Main Supply
230V 50Hz 10A
(1.0 mm2 T & E cable)
Y
4.0mm High Temp
2
3
1
2
8
7
6
5
4
A
B
C
D
E
INSTALLATION
INST
ALL
ATION
Summary of Contents for BMAS 150 OVR
Page 38: ...Page 38 APPENDIX APPENDIX B ...
Page 40: ...Page 40 APPENDIX D NOTES ...
Page 41: ...Page 41 NOTES ...