External Wiring - IDEAL INDEPENDENT COMBI 24 Installation And Servicing

2.19 EXTERNAL WIRING

External Controls – 230V 50Hz
Wiring a 230V 50Hz Room Thermostat,
Diagram A (with optional timer, Diagram B)
1. Remove the link wire from the room
stat/timer plug.
2. Connect the external cable from
the room stat/timer across these
two connections, if a general live
connection is used for the room stat
or timer then connect this to the fused
spur, on the load side (see Diagram
C)
3. If the room thermostat has
compensation and requires a neutral
connection, make this connection to
the fused spur, on the load side.
DIAGRAM A:
DIAGRAM A:
Programmable Room Stat or
Programmable Room Stat or
Room Stat with Internal Timer
Room Stat with Internal Timer
Optional Room Stat or
Optional Room Stat or
Frost Programmable
Frost Programmable
Stat Room Stat
Stat Room Stat
Frost Room
Room
Frost
L N
Stat L N Stat/
Stat Stat/
(Optional) Timer
Timer
(Optional)
DIAGRAM C:
DIAGRAM C:
Use of General Live for Room Stat
Use of General Live for Room Stat
Optional Room Stat
Optional Room Stat
Frost
Frost
Stat
Stat
Mains In
Mains In
Frost Room
Frost Room
L N
Stat L N
Stat/
Stat Stat/
Timer
(Optional)
Timer
(Optional)
32
SECTION 2 - INSTALLATION
Optional External Controls – Extra Low
Voltage
Wiring OpenTherm Room Control or other
OpenTherm Master Device, Diagram D.
1. Remove the timer link plug inside the
timer option cover, located on the
front of the control box
2. Unclip the timer link socket from the
aperture on the rear of the control box,
locate the plug on the same harness
branch and connect these together.
3. Using the rubber bung located
adjacent to these connections, insert
it into the open aperture.
4. Install an OpenTherm connecter (supplied
with OpenTherm Harness or Weather
Compensation kit) on the RHS of the
boiler installer connections and connect
the 2 core cable from the OpenTherm
device.
DIAGRAM B:
DIAGRAM B:
Room Stat with External Timer
Room Stat with External Timer
Optional
Optional
Frost
Frost
Stat Room Stat
Room Stat Timer
Stat
Frost Room
Frost Room
L N
Stat L N Stat/
Stat
Stat/
(Optional) Timer
(Optional) Timer
Frost Protection
If parts of the pipework run outside the
house or if the boiler will be left off for more
than a day or so then a frost thermostat
should be wired into the system.
This is usually done at the programmer, in
which case the programmer selector switches
are set to OFF and all the other controls MUST
DIAGRAM A:
be left in the running position.
Programmable Room Stat or
Room Stat with Internal Timer
The frost thermostat should be sited in a
cold place but where it can sense heat
Optional Room Stat or from the system.
Frost Programmable
Wiring a system frost thermostat, see
Stat Room Stat
digarams A, B and C. Wire the frost
thermostat across the two connections as
shown.
Note. If the boiler is installed in a garage it
may be necessary to fit a pipe thermostat,
preferably on the return pipework.
Frost Room
L N
Stat Stat/
(Optional) Timer
DIAGRAM C:
Use of General Live for Room Stat
Optional Room Stat
Frost
Stat
Timer
Mains In
Frost Room
L N
Stat Stat/
Timer
(Optional)
DIAGRAM B:
Room Stat with External Tim
Optional
Frost
Room Stat
Stat
Frost Room
L N
Stat Stat/
(Optional) Timer
DIAGRAM D:
OpenTherm Device
DO NOT CONNECT 230V TO THESE
TERMINALS OR THE BOILER ELECTRONICS
WILL BE DAMAGED
OpenTherm Device
E.G. Honeywell OT
Bridge R8810
Open Outside
Therm Sensor
Installation and Servicing
Time