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INST
ALL
ATION
INSTALLATION
All the pipework connections are labelled.
Back-up Immersion
All immersion heater wiring should comply with the wiring regulations, BS7671 latest
edition. We would however recommend that a minimum of 2.5mm2 heat resistant flex
is used and the cable is terminated with crimps. This working practice has proved to
provide long lasting and reliable cable terminations in immersion heaters.
Electrical Power/Control Supplies
The existing power/control wiring should be re-connected to the new appliance as
follows:
L
N
E
Permanent 230V 50Hz
Electrical Supply
Minimum 1 cable
fused at 5A
N
N
E
N
L_
3
L_
1
L_
2
SL
_W
SL
_H
SL
_R
SL
_B
SL
_F
E
E
Room Thermostat
N E L SL
MCB
6 A
ON
OFF
L
SL
_B
E N
E
L_
P
N_
P
Boiler Wiring Terminals
Local
Isolator
If frost protection is provided the existing switched live output from the frost
thermostat should be connected into the SL-F terminal provided.
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 ...