gledhill BM125 Installation And Servicing Instructions page 23

1 2 3 4 5
L E N
N E
MAINS BOILER
OUTGOING
INCOMING
SUPPLY
POWER
TO BOILER
SUPPLIES
230V 50 Hz
3 amp
Wiring guide from Clock to ACB
Neutral - Terminal 20
Permanent Live (to clock) - Terminal 21
Hot Water Channel Switched Live (from clock) - Terminal 22
(only required with 2 channel clock)
Heating Channel Switched Live (from clock) - Terminal 23
6 7 8 9 10
LINK
L E L N
SL
ROOMSTAT
OUTGOING
SUPPLY TO
ROOMSTAT
(IF FITTED)
2.0 INSTALLATION
2.2 INSTALLATION
Electrical Connection - Standard Appliance
The BoilerMate 2000 is pre-wired to a 12 way
terminal strip from the A.C.B. and plumbers are
well able to complete the electrical installation
provided they adhere strictly to the IEE
Requirements for Electrical Installations BS
7671. A schematic arrangement of the wiring
is shown on page 24.
All the terminals are suitably labelled.
Note: Do not attempt the electrical work
unless you are competent to carry it out to
the above standards.
Before commencing check that the power
source is in accordance with section 1.2 Site
Requirements and ensure that it is isolated.
Run the external wiring through the service
slot provided in the base of the appliance.
It is recommended that the 3 core input cable
from the isolator to the appliance is not less
11 12
2
than 1.5mm PVC grade to BS 6500.
SL
Make the connections as shown opposite on
the terminal strip provided.
The appliance is provided with a link
between terminals 9 and 11 on the terminal
strip. This must be removed if a room
thermostat is fi tted see opposite.
No Clock Models
• If a remote clock is not being provided links
will be required between 21/22 and 22/23.
• If a single remote clock is being provided
a single link will be required between 21/22
to allow the appliance to provide hot water
24hrs/day.
• If a two channel clock is being provided
no links will be required. (A two channel
clock is normally only required to eliminate
noise caused by the boiler fi ring during the
night).
• Wire the connections from the clock as
shown opposite.
Clamp the cables in the grips provided below
the terminal strip and ensure all cables are
routed to avoid hot surfaces.
Note: The appliance is provided with a 4.0mm
earth cable from an earthing strap on the
primary return (to boiler) pipe to the earth
stud on the wiring panel.
Page 23